Aprilaire 4655 Manual Humidistat<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> The indoor humidity should be set to match the outdoor temperature to prevent water from running down the sides of your windows </span></li><li><span class="a-list-item"> When the relative humidity reverses the Aprilaire 4655 manual digital control humidistat will close the control switch. The Aprilaire 4655 manual digital control humidistat can either be wall mounted or mounted on the return Plenum </span></li><li><span class="a-list-item"> This even water distribution ensures maximum evaporation from your humidifier </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31eOqlxv%2BwL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31ReBGQlpmL.jpg" noproxy>