Well it's really getting cold here and our heating system can't get the humidity much above 30%. The house is 1.900 sq. ft. on a single floor. 95% efficient gas furnace with a Honeywell HE360 powered humidifier on the warm air plenum fed by hot water. The humidifier should be good for 4,500 sq. ft. and has a new media pad installed. The windows are Pella triple glazed and there is 18" of insulation in the attic. The home qualified as Energy Star efficient when built seven years ago. I have run the system with the humidifier always on when the furnace runs, but at 20 degrees outdoor temperature and 71 degrees indoor thermostat setting, the humidity still won't go above 32 percent. Any Ideas what is amiss?
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