Furnace Condensate Production

A high-efficiency furnace (95% AFUE) typically produces one gallon of condensate per hour per 100,000 BTUs, assuming continuous operation. However, actual condensate levels can vary based on several factors:

• Run Time – Short cycling reduces total condensate production.

• Return Air Temperature – Colder return air increases condensation, while warmer air reduces it.

• Humidity Levels – Higher indoor humidity may slightly impact condensate formation.

• System Efficiency – More efficient combustion results in greater condensate production.

Proper drainage and neutralization of condensate are essential to prevent damage to flooring, drains, and HVAC components.