Hacker News Reader

Sorry but this is incorrect. Boilers aka hydronic heat is usually delivered through baseboard fin-tube or hot water radiators. These heat mostly through convection with some radiation. Any humidity in the house is retained. Forced air heats the air and removes humidity absent a humidifier.

View on HN

Forced air doesn't remove humidity from the air either. Humidity is lost through air leakage in homes. Since the air outside had less absolute humidity in the air then humidity will drop due to air leakage. Most measurements of humidity is relative humidity though which changes with air temperature. So any system that heats air will reduce relative humidity.

Neither removes humidity, only AC does that. All types of heating lower relative humidity by increasing the temperature of the air.

Reply on news.ycombinator.com