Dry indoor air affects comfort, health, and homes during heating season. Knowing how whole-house humidifiers work helps contractors match homeowners with the right solution.

Question: I installed a high-efficiency furnace in my 1968 home, which has no HRV. It works great, but sometimes the air in the house gets kind of dry. My thermostat tells me the humidity in the house ...

Bob is a service technician who is well trained and nationally certified. However, he has sometimes suffered from the same confusion that all technicians occasionally do — the facts that he gathers ...