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The Water Cooler
General Discussion
HVAC problem (undersized unit)
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<blockquote data-quote="Viper16" data-source="post: 2776489" data-attributes="member: 1558"><p>A 3-Ton could do it, the problem is your builder was getting extra credit back from the rebates because of the energy star rating he gave the house. I bet you have no trouble heating the home? </p><p></p><p>I would have a contractor that is willing to run a heat load on the building. A block load is good enough to correctly select a tonnage for cooling. </p><p></p><p>Alot of the problem is the systems are only designed to run at their capacity when it is 95F Ambient outside temp. If the sun is radiant on the condenser and we are above 95F then you get a reduction in capacity...the house has trouble cooling. </p><p></p><p>I have a 3 ton in my 1500 sq ft home, and have trouble cooling it with my bad insulation/windows...although I am asking my system to run outside its design conditions. I want a 95F ambient outdoor condenser to run my house below 75F-78F indoor temp...and I complain because I want it to be 70-72F in the house. If you look at the AHRI ratings they are for cooling "Nomnical Cooling Capacities are based on: Indoor Temp of 80F DB / 67F WB. Outdoor Temp of 95F DB, 75F WB. </p><p></p><p>What temperature are you trying to achieve in your home?</p></blockquote><p></p>
[QUOTE="Viper16, post: 2776489, member: 1558"] A 3-Ton could do it, the problem is your builder was getting extra credit back from the rebates because of the energy star rating he gave the house. I bet you have no trouble heating the home? I would have a contractor that is willing to run a heat load on the building. A block load is good enough to correctly select a tonnage for cooling. Alot of the problem is the systems are only designed to run at their capacity when it is 95F Ambient outside temp. If the sun is radiant on the condenser and we are above 95F then you get a reduction in capacity...the house has trouble cooling. I have a 3 ton in my 1500 sq ft home, and have trouble cooling it with my bad insulation/windows...although I am asking my system to run outside its design conditions. I want a 95F ambient outdoor condenser to run my house below 75F-78F indoor temp...and I complain because I want it to be 70-72F in the house. If you look at the AHRI ratings they are for cooling "Nomnical Cooling Capacities are based on: Indoor Temp of 80F DB / 67F WB. Outdoor Temp of 95F DB, 75F WB. What temperature are you trying to achieve in your home? [/QUOTE]
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HVAC problem (undersized unit)
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