In the cooling season the cold dense air needs a little more help to flow. So we turn the furnace up to high speed to get that air to flow.

A Heat recovery ventilator has a few jobs to do and does a good job at it as long as its being maintained and is set up properly. So what...

it was able to heat the incoming water by about 7 degrees and that is pretty good considering this one was hooked up backwards.

make sure the unit is powered for 24hrs before you use it for the first time. This will allow time for the oil to warm up before use.

What is attic rain? When humidity gets trapped or there is just too much inside the attic, it will build up as frost on the roof sheeting, a