Originally Posted by Marvin Gardens
I just installed an Armstrong 95% and they state that you can vent in different places. They say that the intake can be inside and the exhaust outside.
Now that is a pressure difference. Not a big one but there is a difference in pressure especially when the wind is blowing.
I was going to do an inside intake but the energytrust.org says to get their rebate of $200 I have to have the intake outside.
The one I vented up a chimney and did the intake out the back is working fine.
Where the pressure switch comes into play is if the pressure in the exhaust gets too high, then it will shut down. This assumes that the vent is blocked. In fact to test them I just put my hand over the exhaust and it shuts down.
They are rated for indoor air, yes. But not for going into diff press zones.
The press differential is measured by the double tap press switch and will cut out if not with in a specific range of WC".
I had a go round with my OLD,old school dist. He told everybody they could run pipes to diff side of home.
I called Allied air tech service and they said "NO WAY JOSE'" direct quote, that. So they gotta go out on the same side.
Don't take my word for it, call Armstrong .