Can I use my humidifier during the cooling season with my air conditioner?

For a number of reasons, this is not generally recommended. However, most homes in North America that require winter humidification will not require supplemental humidification during the summer months. The output of a furnace humidifier when cold air is passed through it is very low, creating the potential for water stagnation in the reservoir. Further, most of the added humidity would immediate condense on the air conditioning coil anyway and be lost.