it comes with this one i used. http://www.skuttle.com/model_190.html the installation manual is kind of confusing, since it installed on hot duct and suck from return duct. the common practice is installed on returning duct and bypass to hot duct. Since the previous owner hired somebody to install, the installer used the common practice and ignore the manual. or maybe because of the layout limitation, the common way works better. 45% is good, typically it's 30-60% but if outside is below 20F or lower, 30-60% is high even it's comfortable zone. you have to low the humidity, otherwise you will have condensation on your windows or walls, which could introduce mold. so the coder the weather outside, the dryer the air is, however you have to lower down your humidity even you want more moisture because of the condensation. if you close monitor you home humidity, it's in comfort zone, but you still feel dry, you can not do anything about it, because outside is dry as well. cold air intends to be dry.
s*8
18 楼
理论上达到这些数值是不会产生condensation。如果有,你需要检查你的窗户和墙的保温能力。
duct duct , because on
【在 b*****t 的大作中提到】 : it comes with this one i used. : http://www.skuttle.com/model_190.html : the installation manual is kind of confusing, since it installed on hot duct : and suck from return duct. the common practice is installed on returning duct : and bypass to hot duct. Since the previous owner hired somebody to install, : the installer used the common practice and ignore the manual. or maybe because : of the layout limitation, the common way works better. : 45% is good, typically it's 30-60% : but if outside is below 20F or lower, 30-60% is high even it's comfortable : zone. you have to low the humidity, otherwise you will have condensation on