Help...Why is there such a difference in price for the toilet vent filters? Is one really better than the other for a $50-$75 price difference? I don't want the big orange...but I have been looking at Voker...and I thought they are 5/8 inch, not 3/4 as someone said in the thread? Any ideas...
Where is the reverse cycle valve? I am trying to plan ahead if my heat does not work this Spring. Last Spring, it worked, but by late summer, the heat would not work. Blower worked, just no heat. A/C was fine. I am now seeing that you should turn your heat on throughout the Summer to keep the...