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Old 07-18-2016, 10:35 AM
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Join Date: Apr 2000
Location: Central Arkansas
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Originally Posted by jjakucyk View Post
Bigger HVAC equipment is more expensive, but is downsizing the heating equipment worth the cost of upsizing the air conditioning equipment? Using the lights as supplementary heat seems to be a pre-energy-crisis strategy of the 1960s and early 1970s, because it does increase operating costs even if it may save on initial equipment installation. Of course the trap is that if you're going to switch to high-efficiency lighting, it means the HVAC system needs to be re-engineered as well. There's not enough heat in the winter, and now the a/c is oversized so unless it has modulating capability it will not be able to dehumidify sufficiently.
I thought the same heating and cooling loads were used to size the heating and the cooling.