Will the humidifier work on my furnace?

Yes! The Desert Spring humidifier works with any forced air furnace, including heat pumps. Generally, the humidity output will be slightly higher on gas or oil burning furnaces compared to electric or heat pumps due to their hotter output air temperature. The orientation of the furnace is not important. It will work on up flow, down flow, vertical, and horizontal configurations. What is important is to check for sufficient access space to mount the unit on the cold air return duct.