What cooling performance to expect with 2.5 ton central ac at 2000 square feet house in chicago?
Q. I have a 2000 square feet home, basement, 1st and 2nd floor, temp sensor is on first floor. Central ac unit is 2.5 ton, with 130PSI freon (or what ever coolant), today out door is 89 F, in house is 82 before ac. I turned ac on at 11:30am, and sensor is reading 82 F, and now it's 2:30pm sensor is reading 79F, that's 3F drop in 3 hours, is it normal?
Asked by simon - Sat Jun 20 15:46:56 2009 - - 1 Answers - 0 Comments
Q. I have a 2000 square feet home, basement, 1st and 2nd floor, temp sensor is on first floor. Central ac unit is 2.5 ton, with 130PSI freon (or what ever coolant), today out door is 89 F, in house is 82 before ac. I turned ac on at 11:30am, and sensor is reading 82 F, and now it's 2:30pm sensor is reading 79F, that's 3F drop in 3 hours, is it normal?
Asked by simon - Sat Jun 20 15:46:56 2009 - - 1 Answers - 0 Comments
How do I keep my new central AC condenser from blowing fuses?
Q. We had a brand new Kelvinator 5-ton central AC installed in our home just over a month ago. It worked fine for 2 weeks but started blowing hot air or *room temperature* air one day. After turning it off and on several times it started blowing cold air again, but days later...it was *broken* for good and would only blow hot air. I went outside to check the fusebox by the condenser and found most of the insides of it MELTED...wires/fuses/swit ch/connectors. I hired an electrician to come out and replace the fusebox and he noticed that the wires were only 10g which was definitely not enough to carry the amount amps needed for the unit. He also noticed that condenser was located roughly 80 feet away from the electric panel meaning a very far… [cont.]
Asked by Johnny N - Mon Sep 3 14:13:52 2007 - - 12 Answers - 0 Comments
A. contact the plce you bought it from warranty dude
Answered by Ive gone diving - Tue Sep 11 13:52:52 2007
Q. We had a brand new Kelvinator 5-ton central AC installed in our home just over a month ago. It worked fine for 2 weeks but started blowing hot air or *room temperature* air one day. After turning it off and on several times it started blowing cold air again, but days later...it was *broken* for good and would only blow hot air. I went outside to check the fusebox by the condenser and found most of the insides of it MELTED...wires/fuses/swit ch/connectors. I hired an electrician to come out and replace the fusebox and he noticed that the wires were only 10g which was definitely not enough to carry the amount amps needed for the unit. He also noticed that condenser was located roughly 80 feet away from the electric panel meaning a very far… [cont.]
Asked by Johnny N - Mon Sep 3 14:13:52 2007 - - 12 Answers - 0 Comments
A. contact the plce you bought it from warranty dude
Answered by Ive gone diving - Tue Sep 11 13:52:52 2007
Central Air or window ac in a large house to save money?
Q. We just bought a new house in north new jersey. Its a quite big house for NJ. about 5 bedrooms [all about 18 x 20 or bigger] and 2.5 bath. And 2 spare rooms [15 x 18] with a large kitchen . The House has a 3.5 Ton central AC Unit installed and working. I was just wondering how much it would cost to run such an central AC. Would it make more sense closing all vents and buying window AC units to replace such a huge central AC system? We need to cool all 4 bedrooms and the living and kitchen at the least.
Asked by Jessica R - Sun Jul 13 17:37:02 2008 - - 2 Answers - 0 Comments
A. With as many rooms as you want to cool, definitely keep the central air running, rather than window units. Keep the thermostat set as high as you can comfortably handle, turn it up a few degrees higher when no one is home, and the energy cost should be manageable, depending on the weather, expect 75 -100 dollars worth of electricity to run it monthly. Hope this helps 20+ yrs HVAC Tech
Answered by uncledjm14 - Sun Jul 13 18:29:45 2008
Q. We just bought a new house in north new jersey. Its a quite big house for NJ. about 5 bedrooms [all about 18 x 20 or bigger] and 2.5 bath. And 2 spare rooms [15 x 18] with a large kitchen . The House has a 3.5 Ton central AC Unit installed and working. I was just wondering how much it would cost to run such an central AC. Would it make more sense closing all vents and buying window AC units to replace such a huge central AC system? We need to cool all 4 bedrooms and the living and kitchen at the least.
Asked by Jessica R - Sun Jul 13 17:37:02 2008 - - 2 Answers - 0 Comments
A. With as many rooms as you want to cool, definitely keep the central air running, rather than window units. Keep the thermostat set as high as you can comfortably handle, turn it up a few degrees higher when no one is home, and the energy cost should be manageable, depending on the weather, expect 75 -100 dollars worth of electricity to run it monthly. Hope this helps 20+ yrs HVAC Tech
Answered by uncledjm14 - Sun Jul 13 18:29:45 2008
What is the ideal central air condition ton size per square feet of house?
Q. is it 1 ton for every 500 square feet? so a 2000 square foot house would require a 4 ton ac?
Asked by Bombshell - Thu Jan 25 18:10:27 2007 - - 8 Answers - 0 Comments
A. Roughly. But it all depends... It depends on how hot it gets where you are, what your house is insulated like, and the layout. The more exterior walls you have, and the more hot your climate, the more HVAC you'll need. But odds are, 4 tons is probably going to suffice. Mainly, the trick to getting good cooling is setting the thermostat, leaving it alone, and keeping the house closed up. Unless you live in desert conditions, you really only need to knock the temps back a few degrees on most days, it's the humidity you want to keep low and that's accomplished by keeping the house closed up. If you have further questions, feel free to email me at fortitudinousskeptic@yaho o.com
Answered by fortitudinousskeptic - Thu Jan 25 18:21:41 2007
Q. is it 1 ton for every 500 square feet? so a 2000 square foot house would require a 4 ton ac?
Asked by Bombshell - Thu Jan 25 18:10:27 2007 - - 8 Answers - 0 Comments
A. Roughly. But it all depends... It depends on how hot it gets where you are, what your house is insulated like, and the layout. The more exterior walls you have, and the more hot your climate, the more HVAC you'll need. But odds are, 4 tons is probably going to suffice. Mainly, the trick to getting good cooling is setting the thermostat, leaving it alone, and keeping the house closed up. Unless you live in desert conditions, you really only need to knock the temps back a few degrees on most days, it's the humidity you want to keep low and that's accomplished by keeping the house closed up. If you have further questions, feel free to email me at fortitudinousskeptic@yaho o.com
Answered by fortitudinousskeptic - Thu Jan 25 18:21:41 2007
How many central AC units do I need?
Q. My house is 3325 square feet, 1 story, and one sun room open through the family room. It located in North of Dallas Texas. How many central AC units do I need? or how many ton? (It is 14 SEER)
Asked by PD N - Tue Feb 12 10:58:27 2008 - - 2 Answers - 0 Comments
A. Sizing AC units needs an inspection. It takes into consideration the number of windows and doors. If a company uses only the square footage of your home to install a unit, you will not be happy with it. In your case, they will probably recommend two units at around 3 ton each. Ducts will be another consideration.
Answered by sensible_man - Tue Feb 12 11:05:17 2008
Q. My house is 3325 square feet, 1 story, and one sun room open through the family room. It located in North of Dallas Texas. How many central AC units do I need? or how many ton? (It is 14 SEER)
Asked by PD N - Tue Feb 12 10:58:27 2008 - - 2 Answers - 0 Comments
A. Sizing AC units needs an inspection. It takes into consideration the number of windows and doors. If a company uses only the square footage of your home to install a unit, you will not be happy with it. In your case, they will probably recommend two units at around 3 ton each. Ducts will be another consideration.
Answered by sensible_man - Tue Feb 12 11:05:17 2008
Can I use the existing lines of a central ac unit if the unit is 3 ton and i want to replace it with a 3.5 ton
Q. Can I use the existing lines of a central ac unit if the unit is 3 ton and i want to replace it with a 3.5 ton
Asked by robert s - Sun Jul 8 19:22:34 2007 - - 7 Answers - 0 Comments
A. Yes you can , there are no difference in the lines !
Answered by Ratchet1957 - Sun Jul 8 19:30:24 2007
Q. Can I use the existing lines of a central ac unit if the unit is 3 ton and i want to replace it with a 3.5 ton
Asked by robert s - Sun Jul 8 19:22:34 2007 - - 7 Answers - 0 Comments
A. Yes you can , there are no difference in the lines !
Answered by Ratchet1957 - Sun Jul 8 19:30:24 2007
What is a "Two-Stage" Central AC/Heating System?
Q. I had my 12-year-old system replaced w/ a "2-stage" (3.5 ton/13 seer ac, and gas furnace) and although it's quiet and shiny-new, I'm noticing more dirt build-up in the house when I do my "white sock" test on the floors.
Asked by Deck - Sun Jun 7 09:39:53 2009 - - 3 Answers - 0 Comments
Q. I had my 12-year-old system replaced w/ a "2-stage" (3.5 ton/13 seer ac, and gas furnace) and although it's quiet and shiny-new, I'm noticing more dirt build-up in the house when I do my "white sock" test on the floors.
Asked by Deck - Sun Jun 7 09:39:53 2009 - - 3 Answers - 0 Comments
Which central AC system is best for phoenix?
Q. We need to replace our lennox 5 ton split system. Live in phoenix and wanted to know if one brand is better. Can get good prices on Goodman and Hairer but trust Carrier and Trane more. Is there really a difference? Do you have a Hairer or Goodman?
Asked by chairshot - Mon May 18 12:31:19 2009 - - 1 Answers - 0 Comments
A. We have two Trane units in our 4 year old house. In our prior home which was new when we moved in, we had two Trane units that ran all summer non-stop for 11 years. We have the units cleaned and inspected each year, but that was/is the only incurred expense for either set of units!! Out here, I would go with what consistently works.. Good Luck
Answered by Paulie - Mon May 18 16:46:18 2009
Q. We need to replace our lennox 5 ton split system. Live in phoenix and wanted to know if one brand is better. Can get good prices on Goodman and Hairer but trust Carrier and Trane more. Is there really a difference? Do you have a Hairer or Goodman?
Asked by chairshot - Mon May 18 12:31:19 2009 - - 1 Answers - 0 Comments
A. We have two Trane units in our 4 year old house. In our prior home which was new when we moved in, we had two Trane units that ran all summer non-stop for 11 years. We have the units cleaned and inspected each year, but that was/is the only incurred expense for either set of units!! Out here, I would go with what consistently works.. Good Luck
Answered by Paulie - Mon May 18 16:46:18 2009
What refrigerant pressure readings should I have on my central AC unit.?
Q. The reason I'm asking is that I had my evaporator ice up the other day, and was told that low freon could be the cause. Filter is good, and drain is clear. I believe I have a 4 ton system, and it's using R22 as its refrigerant. Checked for leaks at the evaporator and condensor with a "sniffer", and could not detect any leaks. I know sniffers aren't fool proof, so I want to check the pressures. Evaporator hasn't iced up since, even though we are experiencing record high temps and humidity, and will be for the remainder of the week.
Asked by biondomeister - Mon Jul 31 23:59:28 2006 - - 4 Answers - 0 Comments
A. You said you checked the filter and drain. Did you check the evaporator coils to see if they were clean? Low air flow can make unit ice up. Hold a good flashlight on one side of coils and if you can't see light through them they need cleaning . also check your coils on the outside condenser. If coils are clean inside and outside, prosed. If the large line going to the condenser, the suction line is sweating heavy unit should be ok. Mine did this the other day also iced up and my unit is clean as a new one and pressures are ok. On a four ton unit suction pressure should be around 60 psi. and discharge high side should be around 250 psi. Don't for get your unit has a squirrel cage blower, if blades are dirty it will not draw enough air over… [cont.]
Answered by renegadesail - Tue Aug 1 00:54:15 2006
Q. The reason I'm asking is that I had my evaporator ice up the other day, and was told that low freon could be the cause. Filter is good, and drain is clear. I believe I have a 4 ton system, and it's using R22 as its refrigerant. Checked for leaks at the evaporator and condensor with a "sniffer", and could not detect any leaks. I know sniffers aren't fool proof, so I want to check the pressures. Evaporator hasn't iced up since, even though we are experiencing record high temps and humidity, and will be for the remainder of the week.
Asked by biondomeister - Mon Jul 31 23:59:28 2006 - - 4 Answers - 0 Comments
A. You said you checked the filter and drain. Did you check the evaporator coils to see if they were clean? Low air flow can make unit ice up. Hold a good flashlight on one side of coils and if you can't see light through them they need cleaning . also check your coils on the outside condenser. If coils are clean inside and outside, prosed. If the large line going to the condenser, the suction line is sweating heavy unit should be ok. Mine did this the other day also iced up and my unit is clean as a new one and pressures are ok. On a four ton unit suction pressure should be around 60 psi. and discharge high side should be around 250 psi. Don't for get your unit has a squirrel cage blower, if blades are dirty it will not draw enough air over… [cont.]
Answered by renegadesail - Tue Aug 1 00:54:15 2006
New Central AC Sweating / Condensation on coil cover?
Q. I live in Rockville, MD and I just got a new carrier infinity 3 ton ac with humidifier and 95% furnace a week ago. The system is just fantastic, so cool and quite. The system has a condensate pump that pumps to my laundry sink. Only problem I noticed some condensation on the covers where coil is located and also on the cover of the humidifier unit. Is this normal? The condensation was dripping onto the floor, and I never noticed anything like this before. I think also the room with furnace (basement laundry room) is very, very cold, as opposed to the rest of house. Could it have been set up wrong? Please advise.
Asked by MAN - Fri Jun 19 12:53:59 2009 - - 1 Answers - 0 Comments
A. The evaporator for the air conditioning is inside there and condensation is normal when the system is cooling. The humidifier itself shouldn't cause any external condensation, but it's probably downwind of the coil, so it would be cold cabinet wall there caused by the a/c. Can you rule out a water supply leak? Just shut off the water spigot to it to see if that makes any difference. You don't need humidifying now, do you?
Answered by wallmeis - Fri Jun 19 13:07:20 2009
Q. I live in Rockville, MD and I just got a new carrier infinity 3 ton ac with humidifier and 95% furnace a week ago. The system is just fantastic, so cool and quite. The system has a condensate pump that pumps to my laundry sink. Only problem I noticed some condensation on the covers where coil is located and also on the cover of the humidifier unit. Is this normal? The condensation was dripping onto the floor, and I never noticed anything like this before. I think also the room with furnace (basement laundry room) is very, very cold, as opposed to the rest of house. Could it have been set up wrong? Please advise.
Asked by MAN - Fri Jun 19 12:53:59 2009 - - 1 Answers - 0 Comments
A. The evaporator for the air conditioning is inside there and condensation is normal when the system is cooling. The humidifier itself shouldn't cause any external condensation, but it's probably downwind of the coil, so it would be cold cabinet wall there caused by the a/c. Can you rule out a water supply leak? Just shut off the water spigot to it to see if that makes any difference. You don't need humidifying now, do you?
Answered by wallmeis - Fri Jun 19 13:07:20 2009
Is a 5 ton Central Heat and Air Unit for a 1500 sq. ft. home in Oklahoma too big?
Q. I have found a good price on a new 5 ton unit but my husband is concerned that it is too big for our newly constructed home which has R-10 Insulation. He is concerned the AC will freeze up because our home is too small for it.
Asked by Tina - Tue Mar 2 18:36:32 2010 - - 4 Answers - 0 Comments
Q. I have found a good price on a new 5 ton unit but my husband is concerned that it is too big for our newly constructed home which has R-10 Insulation. He is concerned the AC will freeze up because our home is too small for it.
Asked by Tina - Tue Mar 2 18:36:32 2010 - - 4 Answers - 0 Comments
What is an inexpensive central AC/Heat unit for 1000 sq. ft townhouse? This is a tough one for me. Cost?
Q. My research shows I will need at least a 13 SEER? Not sure of the size in tons. My old unit was a small Trane, 23 years, it was good, but now it is shot! The tech told me the compressor is locked-up The ducts, pipes, and wiring into the house all appear to be in good condition. I have not found any decent guides on the Web and most companies want to sell me an expensive monster. Thanks.
Asked by Alan Superman - Fri Aug 17 16:36:14 2007 - - 3 Answers - 0 Comments
A. I would get another opinion on that locked up compressor. Not all service people are well trained. Maybe an existing capacitor is out or a start kit would help. If your not confident that your repair man tried all avenues to unstick this compressor have another company check it and they can give you another estimate at same time.
Answered by gizmoe - Fri Aug 17 22:23:11 2007
Q. My research shows I will need at least a 13 SEER? Not sure of the size in tons. My old unit was a small Trane, 23 years, it was good, but now it is shot! The tech told me the compressor is locked-up The ducts, pipes, and wiring into the house all appear to be in good condition. I have not found any decent guides on the Web and most companies want to sell me an expensive monster. Thanks.
Asked by Alan Superman - Fri Aug 17 16:36:14 2007 - - 3 Answers - 0 Comments
A. I would get another opinion on that locked up compressor. Not all service people are well trained. Maybe an existing capacitor is out or a start kit would help. If your not confident that your repair man tried all avenues to unstick this compressor have another company check it and they can give you another estimate at same time.
Answered by gizmoe - Fri Aug 17 22:23:11 2007
Central AC still not working well, please help!?
Q. This is the continuing saga of our Central AC: We replaced the outside unit last November. It is a 31/2 ton, and that is the same size as we had. This year, the coil went out. Replaced the coil, not cooling enough, replaced the coil, and again... We are on the 4th coil, 2nd AC guy. Both contractors said that the coils they installed were fine, they say the problem is in the ducts- they are 30 years old, and worn out. So... I personally replaced the ducts. Checked for leaks. Temp at coil is 68, temp at outlet (register or damper, depending on who we've talked to) is 70. Temp in house is 83. It all worked great last year, any idea of why it is not working this year??? ANY help/ideas would be greatly appreciated!!! Thanks.
Asked by staz - Wed Jul 30 20:33:48 2008 - - 6 Answers - 0 Comments
A. Check the temp of the air going into, and leaving the furnace / ac system, you should get a minimum of a 20 degree drop across the inside coil, or something's amiss. Take a measurement where the filter goes in, then another at the first air outlet point you can find. If you're not getting the 20 degree drop, the system's not doing what it should, mechanically. If the problem with the ducts is that they're undersized, you should actually get more of a temp drop, but end up with a system that will not move enough air throughout the house, and will likely cause the compressor to fail before it's time. What you really need is a GOOD hvac tech to look the situation over, and give you an honest answer to what's going on. You may be ready… [cont.]
Answered by uncledjm14 - Wed Jul 30 20:47:51 2008
Q. This is the continuing saga of our Central AC: We replaced the outside unit last November. It is a 31/2 ton, and that is the same size as we had. This year, the coil went out. Replaced the coil, not cooling enough, replaced the coil, and again... We are on the 4th coil, 2nd AC guy. Both contractors said that the coils they installed were fine, they say the problem is in the ducts- they are 30 years old, and worn out. So... I personally replaced the ducts. Checked for leaks. Temp at coil is 68, temp at outlet (register or damper, depending on who we've talked to) is 70. Temp in house is 83. It all worked great last year, any idea of why it is not working this year??? ANY help/ideas would be greatly appreciated!!! Thanks.
Asked by staz - Wed Jul 30 20:33:48 2008 - - 6 Answers - 0 Comments
A. Check the temp of the air going into, and leaving the furnace / ac system, you should get a minimum of a 20 degree drop across the inside coil, or something's amiss. Take a measurement where the filter goes in, then another at the first air outlet point you can find. If you're not getting the 20 degree drop, the system's not doing what it should, mechanically. If the problem with the ducts is that they're undersized, you should actually get more of a temp drop, but end up with a system that will not move enough air throughout the house, and will likely cause the compressor to fail before it's time. What you really need is a GOOD hvac tech to look the situation over, and give you an honest answer to what's going on. You may be ready… [cont.]
Answered by uncledjm14 - Wed Jul 30 20:47:51 2008
Replacing Central AC 2500 sqft South Florida?
Q. Homedepot sent a guy to my house. I have two 3 ton units. Wanted to replace both with one five ton unit. The current units are all mixed up. I have a Newer air handler with an Old compressor and an Old air handler with a Newer Compressor. I was thinking move the Newer air handler with the newercompressor and install a brand New air handler and compressor. Sales guy says NOOO. Just buy two spanking new TRANE 17 seer rating systems and you'll be real happy! Total cost..oh with the current discounts you'll save 3K in rebates for a total cost of $12,000!! My in laws have a 3K sqft house and have a 5 ton..why do I need 6 tons??!!
Asked by Noel - Fri Aug 17 20:36:37 2007 - - 3 Answers - 0 Comments
A. First of all don't go through Home Depot or any other 3rd party. Leave out the middle man and hire an HVAC company directly. Home Depot will be getting a cut of that 12k. As long as there are not any leaks there is no reason you cannot put the newer condenser with the newer air handler. There is no good reason to junk good equipment. If the existing air handler does not have a TXV for the metering device have one installed or replace the evaporator coil with one that does. That will make a huge difference in performance. For the new system it is up to you if you want to go with a system that uses the new refrigerant (r410-a). You will need a new lineset since the oils are not compatible. You just need to find an honest company… [cont.]
Answered by mike b - Fri Aug 17 21:29:29 2007
Q. Homedepot sent a guy to my house. I have two 3 ton units. Wanted to replace both with one five ton unit. The current units are all mixed up. I have a Newer air handler with an Old compressor and an Old air handler with a Newer Compressor. I was thinking move the Newer air handler with the newercompressor and install a brand New air handler and compressor. Sales guy says NOOO. Just buy two spanking new TRANE 17 seer rating systems and you'll be real happy! Total cost..oh with the current discounts you'll save 3K in rebates for a total cost of $12,000!! My in laws have a 3K sqft house and have a 5 ton..why do I need 6 tons??!!
Asked by Noel - Fri Aug 17 20:36:37 2007 - - 3 Answers - 0 Comments
A. First of all don't go through Home Depot or any other 3rd party. Leave out the middle man and hire an HVAC company directly. Home Depot will be getting a cut of that 12k. As long as there are not any leaks there is no reason you cannot put the newer condenser with the newer air handler. There is no good reason to junk good equipment. If the existing air handler does not have a TXV for the metering device have one installed or replace the evaporator coil with one that does. That will make a huge difference in performance. For the new system it is up to you if you want to go with a system that uses the new refrigerant (r410-a). You will need a new lineset since the oils are not compatible. You just need to find an honest company… [cont.]
Answered by mike b - Fri Aug 17 21:29:29 2007
Is it cheaper to heat one room with an electric space heater or the whole house with central gas furnace?
Q. I have a 3 bedroom house with a modern central heat/ac. The central heat is a new 3 burner/ton gas furnace by Lennox. I live in an area where daytimes are comfortable but evenings are cold and I have been using an electric space heater to keep the room I sleep in warm at night. I know there are many variables, but assuming everything is average (average size home, bed room, insulation, etc) would it be cheaper to heat only one room with the more expensive electricity or the entire house with the cheaper natural gas?
Asked by NT - Fri Dec 8 00:32:55 2006 - - 1 Answers - 1 Comments
A. Heat the one room.
Answered by Mary F - Fri Dec 8 00:42:34 2006
Q. I have a 3 bedroom house with a modern central heat/ac. The central heat is a new 3 burner/ton gas furnace by Lennox. I live in an area where daytimes are comfortable but evenings are cold and I have been using an electric space heater to keep the room I sleep in warm at night. I know there are many variables, but assuming everything is average (average size home, bed room, insulation, etc) would it be cheaper to heat only one room with the more expensive electricity or the entire house with the cheaper natural gas?
Asked by NT - Fri Dec 8 00:32:55 2006 - - 1 Answers - 1 Comments
A. Heat the one room.
Answered by Mary F - Fri Dec 8 00:42:34 2006
HVAC central air conditioning unit-information?
Q. * 3 ton 13 SEER 36k btu 230 volt central AC unit* What does SEER stand for and how are smaller/larger different-10 to 14 SEER ?
Asked by Tennessee NatureBoy - Mon May 8 00:22:22 2006 - - 4 Answers - 0 Comments
A. SEER stands for "seasonal energy efficiency ratio". It is really just stating how much energy it uses for it's total amount of cooling output. A change from SEER 10 to SEER 13 represents a 30 percent improvement in energy efficiency. It looks like the unit is usually only a few inches taller to go from a 10 SEER to a 13 SEER unit.
Answered by Devo - Mon May 8 00:42:56 2006
Q. * 3 ton 13 SEER 36k btu 230 volt central AC unit* What does SEER stand for and how are smaller/larger different-10 to 14 SEER ?
Asked by Tennessee NatureBoy - Mon May 8 00:22:22 2006 - - 4 Answers - 0 Comments
A. SEER stands for "seasonal energy efficiency ratio". It is really just stating how much energy it uses for it's total amount of cooling output. A change from SEER 10 to SEER 13 represents a 30 percent improvement in energy efficiency. It looks like the unit is usually only a few inches taller to go from a 10 SEER to a 13 SEER unit.
Answered by Devo - Mon May 8 00:42:56 2006
HVAC-- Converting a R-22 AC over to new R-407 freon. Can it be done by changing out orifice in the M coil?
Q. I have a 9 yr old Rheem 3 1/2 ton Central Air. The "M" coil is leaking and needs to be replaced. Can I put in a new coil with a R-407 orifice and convert it over, while still using the same compressor? I would prefer a licensed HVAC tech answer, who has done it before. Thanks Debbie, thanks for the compliment. John, always good to hear from other trade people. I gave the best answer to Orak, since he had some info on the queston. I found out that the new freon is 410a instead of 407c. Carrier calls it Puron. I wanted to get an idea if I could get away wothout replacing the whole unit. The AC guys that I deal with, wanted to completely replace everything including the two lines that connect the compressor and condenser. I wanted… [cont.]
Asked by Fordman - Sat Aug 4 14:28:38 2007 - - 3 Answers - 0 Comments
A. From the Gentron (distributor of refrigerants) site: < >: "Relative to R-22, there is little to no capacity decrease with Genetron 407C, making it easy to use in R-22 equipment designs. However, some loss of efficiency may occur and some equipment modifications will be required when retrofitting these systems to Genetron 407C. For retrofitting R-22 systems, the equipment manufacturer should be consulted for their specific guidelines for R-407C. "Genetron 407C has been designed as a substitute for R-22, but it is not a drop-in replacement. Mineral oils used with R-22 are immiscible with Genetron 407C. Service technicians should consult the original equipment manufacturer for the recommended lubricants and retrofit guidelines. Genetron… [cont.]
Answered by OrakTheBold - Sat Aug 4 20:16:53 2007
Q. I have a 9 yr old Rheem 3 1/2 ton Central Air. The "M" coil is leaking and needs to be replaced. Can I put in a new coil with a R-407 orifice and convert it over, while still using the same compressor? I would prefer a licensed HVAC tech answer, who has done it before. Thanks Debbie, thanks for the compliment. John, always good to hear from other trade people. I gave the best answer to Orak, since he had some info on the queston. I found out that the new freon is 410a instead of 407c. Carrier calls it Puron. I wanted to get an idea if I could get away wothout replacing the whole unit. The AC guys that I deal with, wanted to completely replace everything including the two lines that connect the compressor and condenser. I wanted… [cont.]
Asked by Fordman - Sat Aug 4 14:28:38 2007 - - 3 Answers - 0 Comments
A. From the Gentron (distributor of refrigerants) site: < >: "Relative to R-22, there is little to no capacity decrease with Genetron 407C, making it easy to use in R-22 equipment designs. However, some loss of efficiency may occur and some equipment modifications will be required when retrofitting these systems to Genetron 407C. For retrofitting R-22 systems, the equipment manufacturer should be consulted for their specific guidelines for R-407C. "Genetron 407C has been designed as a substitute for R-22, but it is not a drop-in replacement. Mineral oils used with R-22 are immiscible with Genetron 407C. Service technicians should consult the original equipment manufacturer for the recommended lubricants and retrofit guidelines. Genetron… [cont.]
Answered by OrakTheBold - Sat Aug 4 20:16:53 2007
My second floor central AC unit in the attic does not cool sufficiently in the daytime.?
Q. At night the outlet registers blow air between 60 - 64 degrees, the return register air leaves at about 76. During the day the outlets blow only 72 - 75 degrees, with the air exiting into the return register at about 78. The overall upstairs of the house is approximately 50 x 25 and I have a 3 ton unit. The evaporator coil and condenser were replaced last fall. By my calculations the unit requires 1200cfm on the returns, and I have 4 return registers in different rooms running 6" return flex duct. From some web sites it sounds like that is not sufficient to achieve the 1200cfm requirements of a 3 ton system, but the flow into the rooms doesn't seem bad. Would inadequate return flow cause the symptom of increased temperature of the… [cont.]
Asked by Dave - Tue Jun 16 22:02:55 2009 - - 2 Answers - 0 Comments
Q. At night the outlet registers blow air between 60 - 64 degrees, the return register air leaves at about 76. During the day the outlets blow only 72 - 75 degrees, with the air exiting into the return register at about 78. The overall upstairs of the house is approximately 50 x 25 and I have a 3 ton unit. The evaporator coil and condenser were replaced last fall. By my calculations the unit requires 1200cfm on the returns, and I have 4 return registers in different rooms running 6" return flex duct. From some web sites it sounds like that is not sufficient to achieve the 1200cfm requirements of a 3 ton system, but the flow into the rooms doesn't seem bad. Would inadequate return flow cause the symptom of increased temperature of the… [cont.]
Asked by Dave - Tue Jun 16 22:02:55 2009 - - 2 Answers - 0 Comments
Central Air Conditioner dimensions? (The outside part) And a little about Carrier?
Q. Are different tons bigger or smaller depending on what ton they are? My neighbor has this really small looking one and I am getting 2.5 ton AC so I was wondering if the sizes were different. Are Carrier Air Conditioners good? Like I said I am getting a 2.5 ton 13 SEER A/C unit.
Asked by Mary - Thu Sep 20 21:59:14 2007 - - 6 Answers - 0 Comments
A. The tonnage-12000 BTU = 1 ton and the SEER rating (seasonal energy efficiency rating will determine your condenser size. The more surface area the mor heat can be dissapated. A 13 SEER will be larger than the 10 SEER of many years ago even with the same tonnage.
Answered by Kevin D - Fri Sep 21 02:47:32 2007
Q. Are different tons bigger or smaller depending on what ton they are? My neighbor has this really small looking one and I am getting 2.5 ton AC so I was wondering if the sizes were different. Are Carrier Air Conditioners good? Like I said I am getting a 2.5 ton 13 SEER A/C unit.
Asked by Mary - Thu Sep 20 21:59:14 2007 - - 6 Answers - 0 Comments
A. The tonnage-12000 BTU = 1 ton and the SEER rating (seasonal energy efficiency rating will determine your condenser size. The more surface area the mor heat can be dissapated. A 13 SEER will be larger than the 10 SEER of many years ago even with the same tonnage.
Answered by Kevin D - Fri Sep 21 02:47:32 2007
What pressures do the high and low side run at on central air conditioners?
Q. I do car AC but never my house, does anyone know the high and low side pressures that a central air unit runs, at present its 75PSI on the suction side and 225PSI on the high side, its a 3 ton 10 seer.running r22 any answers would be welcome. Chris
Asked by chris s - Sun Jun 29 10:31:05 2008 - - 2 Answers - 0 Comments
A. It is according to the tempature outside and your indoor heat load. Normal Low side at 80 degree outdoor and 76 indoor would be about 72psi suction 225 head pressure. If your head is higher than 250psi check you outdoor coil for dirt. hope this helps
Answered by Daryl E - Sun Jun 29 10:37:07 2008
Q. I do car AC but never my house, does anyone know the high and low side pressures that a central air unit runs, at present its 75PSI on the suction side and 225PSI on the high side, its a 3 ton 10 seer.running r22 any answers would be welcome. Chris
Asked by chris s - Sun Jun 29 10:31:05 2008 - - 2 Answers - 0 Comments
A. It is according to the tempature outside and your indoor heat load. Normal Low side at 80 degree outdoor and 76 indoor would be about 72psi suction 225 head pressure. If your head is higher than 250psi check you outdoor coil for dirt. hope this helps
Answered by Daryl E - Sun Jun 29 10:37:07 2008
From Yahoo Answer Search: 'ton central ac'
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Aaron Crowe
Wed, 09 Sep 2009 18:00:01 GM
A 2.5 . ton central air-conditioning. unit running 24 hours a day costs $312 a month at the 12 cents national average for a kilowatt, versus $8.88 a month for using a floor fan 24 hours a day. I don't know what a kilowatt costs in ...
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