I don't know about legally, but I would make sure you get something from the homeowner telling you that they are okay with window coverings if you are going that route. My concern would be that even if there is drapes, you cannot force people to draw them. People tend to have a short memory of...
BronYrAur,
Nope they are not. The give external static pressure, which does not include anything outside the furnace itself (maybe a 1" disposable filter is included). They have no way of knowing what coil is being put on the furnace, and besides the biggest difference on a residential "A"...
Thanks for the replies.
I know i must be missing something really simple here. I understand that matter changes density with temperature, I just don't know how a blower is able to produce an external static pressure of 0.8 in.w.c. with cool air, and only able to produce 0.5 in.w.c. for warm...
I had a customer call me up and ask if he could use a different furnace for a design i did for him. When checking out the blower specs for the furnace he was asking about, it gave me fan speeds for up to 0.8" w.c. for cooling, but limits me to 0.5" w.c. for heating.
Why would the pressure...
