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Servicetech · 03-15-16, 07:06 PM

To hit 85% you have to get the air/fuel ratio exactly right. At 83% you start having condensation problems. You’re talking about modifications to get THREE PERCENT. In TEXAS you will NEVER see the difference in your gas bill. Is 92f already, you use the heat 3 times a year?

We went from an 88k 80% to a 44k 90% in Oklahoma, didn't see any real world difference in gas bills. Cutting the furnace size in HALF did make a HUGE difference in comfort, no more wide temp swings between cycles.

Your efforts are much better spent on improving AC efficiency, there’s a LOT more on the line. REAL MONEY.... Looking at your signature you have really tightened up the house, when it comes time to replace the AC install HALF the typical 500sqft per ton. 1,000sqft per ton may sound nuts for TX, but does your house not have about 1/2 the typical heat gain for your area?

03-15-16, 07:06 PM	#14
Servicetech Apprentice EcoRenovator Join Date: Nov 2013 Location: Moore Oklahoma Posts: 267 Thanks: 108 Thanked 23 Times in 21 Posts	To hit 85% you have to get the air/fuel ratio exactly right. At 83% you start having condensation problems. You’re talking about modifications to get THREE PERCENT. In TEXAS you will NEVER see the difference in your gas bill. Is 92f already, you use the heat 3 times a year? We went from an 88k 80% to a 44k 90% in Oklahoma, didn't see any real world difference in gas bills. Cutting the furnace size in HALF did make a HUGE difference in comfort, no more wide temp swings between cycles. Your efforts are much better spent on improving AC efficiency, there’s a LOT more on the line. REAL MONEY.... Looking at your signature you have really tightened up the house, when it comes time to replace the AC install HALF the typical 500sqft per ton. 1,000sqft per ton may sound nuts for TX, but does your house not have about 1/2 the typical heat gain for your area?