Smarty wrote:

... It takes 1000 Btu to evaporate a pound of water.

I disagree.

Really? :-)

How much energy do you need to keep your house RH 50% at 70 F with
an indoor humidity ratio wi = 0.00787 pounds of water per pound
of dry air when the outdoor humidity ratio wo = 0.0025, with 200 cfm
of natural air leakage?

Nick