Venting and cooling the 2nd floor (master bedroom + bath)
As we moving along with our renovation upstairs, I came back to get some guidance on venting and cooling the 2nd floor.
With the help of this forum from Martin, Dana and others we did our best to insulate the 2nd floor (it was not new construction, this will be our master bedroom with a large bathroom). Our rafters are 5.5 inches deep, so we did 3″ closed cell, I then as advised here added the 1″ foil faced EPS foam strips onto the rafter edges to add an extra inch, and filled the rest of the cavity with 3.5 Inch of Roxul Batt and. Walls we fully filled with open cell and added 1/2″ XPS ridgit foam board.
Windows: went with Intus tripple pane. Will have 3 total new windows installed shortly.
The rest of the house:
Have not started to do any work on the rest of the house yet, but in the future, as we renovate more, would also like to insulate well and get this home to be as well insulated as we can.
Question to the experts:
Since everything still pretty much accessible, what would be the best air flow system to put in place? I have read many threads here and still confused on what to go with? ERV, HRV? or Exhaust only?
Should the system be concentrated for upstairs with the option to later expand for the whole house? or should i go with the standalone units like Lunos E2? WhisperComfort 40/20 or 20/10 CFM Ceiling Spot Energy Recovery Ventilator? If so, which?
My “old school dad” who is the handy man claims that exhaust fan only approach in the bathroom would be more than enough, however he has not done much research, have not kept up to date on these things and is not considering that the 2nd floor now is pretty well insulated and air tight. He does great work, but needs my “new age” direction in this and guidance. My position, is to get this thing right the first time, I think since we want to live here for some time, we are looking to ensure good air quality first, then the wife is very sensitive when it comes to noise, and lastly budget. I’m willing to spend a bit more on a good quiet efficient system that would serve our needs.
Also, we don’t have central air and would like to install a split system. If I can kill two birds with one stone here, and get recommendation/advice on both things, that would be great.
We live in Northern NJ, the space upstairs is approximately 800sqf (with full bathroom). I can supply pictures, and answer any other questions that would point me in the right direction.
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