hotblast1357 wrote:But before I added the baro, I was not sucking as much air out as I am now
Here’s another way of looking at air infiltration and barometric dampers:
My house is 2,000 square feet. With 8-foot ceilings it contains 16,000 cubic feet of air (ignoring attic and cellar). An “average” not-too-bad home has one air exchange per hour, so in my case 16,000 cubic feet per hour.
Now let’s take a typical coal stove convection blower that moves 200 cubic feet of air per minute. When you stand by your stove, you can feel quite a blast of air. Imagine that we take the blower off the stove and set it up with a vent so it is drawing outside air into my house. In an hour, the blower will move 12,000 cubic feet, significantly less than the natural exchange rate.
Compare the blast you feel from the convection blower, to the low flow into your barometric damper, and you will probably conclude that the baro’s effect on infiltration is trivial.