Just to review, up until now we know how to stop Cold Air Penetration down in the basement and restrict Heat Loss up in the attic. This included things like the hole in the floor under the Tub/Shower and the Attic Access panel. Right? Right!
Now that our house is that much more tightly insulated against all that winter can and will throw at us it is time to consider indoor air quality. Without cold air coming into the house and heat escaping the inside air becomes stagnant and filled with excessive moisture. When all this happens and everything goes badly this will lead to mold and mildew.
There in two brief paragraphs I’ve covered weeks of blog posts.
A Heat Recovery Ventilation unit (HRV) is installed inside stale stagnant air is exhausted outside and fresh air from outside is pumped inside. And, poof your problem is solved. The stagnant interior air with all its nasty smells and moisture is exhausted outside. At the same time clean Vermont Fresh Air is pumped inside. Isn’t that just great!
Well, not so fast. If that is all we do we have solved nothing. Granted the inside air is clean and fresh. Granted all the smells are gone. Oops, the heating bill just went through the ceiling and we have failed to conserve energy. Remember the hole in the floor under the tub and the miserable attic access panel? If all we do is exhaust air and pump in fresh air then things have not improved at all!
But, if we incorporate within the exhausting air and the fresh air, a Heat Recovery Unit that captures the heat and transfers it to the cold air; then we will have improved everything.
Down in the basement we can install a Heat Recovery Unit that will solve the problems. This is where the “magic” of the ventilation system happens. Tomorrow we will look inside and see how it all works and to what degree of Energy Efficiency.