I have been reading and searching on this forum as much as I possibly can, I am a total HVAC noob lol. My wife and I just bought our first house and it is the first house in our lives weve had that have a ventilation controller system. Its the AprilAire 8126. We have a gas furnace rated at 90 FMEU's or whatever the rating is. The 8126 is integrated into that.
It is a 2 story house, with crawlspace. It is roughly 1600 sq ft home,3 bedrooms, gas stove and gas fireplace. Brand new construction completed 9.21.09. It also has central AC. Its an energy effecient home.
My wife and I have never had gas furnace nor a ventilation controller. The builders supposedly configured it for defaults of our home.
I look and the dial that sets the ventilation time is set to 45mins! I sure hope the cycle time is every 3 hours or something cuz according to the manual 20mins every 1 hr is standard.
I have read the controllers manual and understand for the most part how it operates and whats conditions in operation are, but dont have any idea how that plays into our environment and indoor house conditions.
I am confused tho, and winter is fast coming up. If this thing ventilates air while we are trying to keep the house warm in winter, wont all that heat energy go to waste because this thing is letting in cold fresh air??
Or does the controller take into account the heater running and considers that "ventilation time" and therefore will not ventilate?
I am also confused about RH and dewpoint and all that stuff when it comes to indoors vs outdoor air mixture and how that all changes with the ventilator.
I know the ventilator reads indoor RH and somehow compares that with outdoor temperatures...but in the case above? would bringing in the cold air cause indoor RH to go above 55%?(the controllers indoor RH cutoff) and therefore not run anyways? Or, does the outdoor temp really not matter and it has to do with dewpoint, therefore the controller only looking at outdoor temp...doesnt really know what will happen? It decides to run anyways and causes our house to get bad humidity, etc...
I just dont know what the best setting is for this device and whether it will waste our energy during the winter...or cause mold / mildew problems...
So, Im asking if anyone would be willing to maybe educate me a bit and suggest best settings for this ventilator?