Let me start with a gas furnace question. Correct me if mistaken, but with a gas furnace, say 100kBTU, if one is 80% efficient and the other 95%, you get more heating capacity with the 95%. So you might be able to use a slightly smaller furnace if 95% compared to 80%. Is that correct? Does the gas furnace efficiency also take into account any electrical savings related to a more efficient blower motor (because that part of it wouldn't change the size of furnace needed)?
Now to AC. Part of the efficiency improvement may be due to the compressor itself, part is due to the condensor coil, and part is due to the evaporator coil (and maybe a little due to fan motor ??). So if we compare an older 3-ton 10 SEER AC unit with a 3-ton 16 SEER AC unit for example, do we get more cooling with the 16 SEER unit, and thus does it impact the size of the AC unit needed?
I would think only the SEER improvement due to the evaporator coil is what might change the size of the AC unit needed, but that's what I'm asking. Is that something that contractors take into account when recommending an AC unit?
Now to AC. Part of the efficiency improvement may be due to the compressor itself, part is due to the condensor coil, and part is due to the evaporator coil (and maybe a little due to fan motor ??). So if we compare an older 3-ton 10 SEER AC unit with a 3-ton 16 SEER AC unit for example, do we get more cooling with the 16 SEER unit, and thus does it impact the size of the AC unit needed?
I would think only the SEER improvement due to the evaporator coil is what might change the size of the AC unit needed, but that's what I'm asking. Is that something that contractors take into account when recommending an AC unit?
