Re: The HVAC is kaputt decisions decisions

Posted by Geo-TH,In on August 01, 2016 at 13:05:45 from (172.78.89.144):

In Reply to: The HVAC is kaputt decisions decisions posted by Dodgeit on August 01, 2016 at 08:27:36:

Dodgeit,

Here are the facts. I have a 2000+ sq ft home, plus 2 car, plus basement. I have a 16 year old 12 seer Rudd 2.5 ton. It handles my house in Terre Haute just fine. Doesn't run all the time to keep my place at 72. Normally I would set thermostat to 75, but I have to lower temp to lower humidity.

If you have good windows and doors, it's not the size of the AC that matters as much as how well your attic and walls are insulated. If your walls have a way to block radiant heat gain. I think having a brick home is the next thing to having an underground house. It takes a long time for my 25000 brick to heat up and a long time to cool off.

I have a 1560 ft country home too, wood siding. Insulated and vented the same as my 2000+ place. Basement isn't tall enough for central. It's cooled nicely with a 7000 BTU window shaker in master and 10,0000 in Dining. That's about 1.5 ton. 12,000=ton.
All my duct work is metal and in the basement, not in a hot attic. I also pull a lot of 55 degree air off my basement floor. Dehumidifier in basement doesn't run during the AC season too.

I worked my way through college as a commercial HVAC repairman at Bethlehem Steel , N Indiana. I'm not a fan of heat pumps. Won't have one ever!!!

I believe attics can't have too much ventilation. I have eve, roof and power vent in my house to reduce AC load.

My last AC lasted 29 years without any repairs. Only cleaned condenser regularly, change filers and oil fans.
So does size really matter?

Hope I was helpful.
geo

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