Hello Well having Wood Pellet heat and keeping it from escaping is another problem. Cold winds coming in the Gable vents will take it out! After having the roof done years ago with the new building code to cut a ridge vent along the peak is a big issue in the winter. Sure, the roofers said it was great! It makes the roof last longer and keeps the house cooler in the summer!! But noone said how the air flow from the soffit vents up to the ridge vent create a vacuum that literally sucks the heat right out of the house!! So I put in the styrofoam proper vents from the soffit to the ridge between the rafters and covered them with reflectix foil all from home depot. Recently a roofer told me, well if there is enough insulation in the attic floor, then proper vents are not needed. By code they are only installed in Cathedral Ceilings!! Well the Building Code should be changed The codes are not perfect!! So I just finished building plywood doors to cover up the 2 Gable Vents for the winter! Just got the last one done over the weekend. I cannot tell you how much of a difference. My daughter says she can now sleep better at night because her room is no longer drafty The Pellet stove now can heat the 2,000 sqft house on heat setting 2 and then bumped up to heat setting 3 early in the morning on colder nights like last night when it was down to 15 degrees. Before I bumped it up to 3 at 6:30 AM, the livingroom was 67 degrees and really not bad. No more draftyness from the roof!! So beware of Gable Vents and Ridge vents in open attic spaces during the winter!! See pic of snow maps below and Closed Gable Vent!!