EcoRenovator - View Single Post - Heating Degree Days NOT useful for sizing

stevehull · 03-12-16, 07:21 AM

Elcam,

You are exactly correct that oversizing an AC unit doesn't cost any more to cool than a correctly sized unit.

But ONLY if you are talking temperature . . . .

The condensation of latent heat requires that the unit actually run longer if the system is to remove humidity. That is the reason AC works - to remove moisture and as an added benefit, the air is cooler.

Steve

03-12-16, 07:21 AM	#8
stevehull Steve Hull Join Date: Dec 2012 Location: hilly, tree covered Arcadia, OK USA Posts: 826 Thanks: 241 Thanked 165 Times in 123 Posts	Elcam, You are exactly correct that oversizing an AC unit doesn't cost any more to cool than a correctly sized unit. But ONLY if you are talking temperature . . . . The condensation of latent heat requires that the unit actually run longer if the system is to remove humidity. That is the reason AC works - to remove moisture and as an added benefit, the air is cooler. Steve __________________ consulting on geothermal heating/cooling & rational energy use since 1990