we install quite a few general air 1042 humidifiers at work.home owners always ask us if they work well and i always reply yes,that is the model i have at home.my boss on the other hand says the flow throughs are crap and a steam type though expensive is the only way to go.so i went out and bought a hygrometer for my house and the humidity varies bettween 34% and 40% with the humidifier on.so i turn humidifier off and low and behold the readings remain basically the same.i do have an older home that is by no means air tight and i have no HRV.the heating system is forced air hi-eff gas.just wondered if any of you other guys have actually monitored your humidity readings????????