"Stormin Mormon" wrote:

I've not heard of anyone doing this, but how about a flex hose like dryer
vent. From the air intake side of the furnace to an outdoor vent, like a
dryer vent. Every time the furnace runs, it would draw in some slight
ammount of fresh air from the outside. Of course, it would gently pressurize
the house so you'd lose some heat that way. But, it would be a convenient
way to do it, and it sounds like you're losing heat using the present sytem
of open windows every three days. So, it wouldn't be a major change in the
power bill.

That's exactly what the hvac contractor did on my new house except that he used
solid 6" pipe, not flex hose. He said I could buy a powered damper, but he
didn't think would would be any better than a manual damper which is what we
ended up with.

--
"Tell me what I should do, Annie."
"Stay. Here. Forever." - Life On Mars