We are int he process of re-doing the basement. Everything is pretty much done and sealed off and we have an issue.
The architect put vents from the furnace room the the exterior of the home, these were installed and insulated by the contractor and the inspector approved it before closing it up completely. We recently had a couple of days where it was about -5 degrees and I noticed the water in some pipes froze, mainly the upstairs shower drain and some downstairs pipes.
We haven't had a day like this again but for now I covered the vent with insulation(I know this is a no no but the vent has never been there in the first place with the same setup so I figure I'll be good until I find a solution or it get a bit warmer, 1-2 weeks tops).
I've spoken to the contractor and he tells me everything was done right, which I saw was all insulated, the city inspector has also been very strict and he actually made them insulate the vents more prior to closing up and giving us the OK. So as much as I would like to say this is a mistake on their(contractor) part I honestly don't think it was.
I have asked the contractor to please take the vent cover off as I want to see if there is any non insulated space between the pipes and outside(circular pipe, rectangular opening)
Sorry for the lengthy post, what I am looking for is some sort of vent grill that can open and close either based on temperature of the furnace operating. I know they exist, but the opening is a rectangular one... I would not mind paying for this and having a good solution(not closing it up during coldest winter weeks).
having it open/close also minimizes the cold air coming in or hot air in the summer.
Something like this looks like something I would use but I was thinking if they exist with some insulation, as I am sure the cold will get through pretty quick with this setup:
Picture of the setup, this is from the blueprint: