I want to vent smoke, such as roasting coffee smoke and cooking grease out of my kitchen. I do not have a hood, nor is there room to install one due to cabinet and window placements just above the stove. I have a window just above the stove, so placing a fan in the window is doable and seemingly effective. But in the winter having a fan suck all of the hot air out of the house is not ideal.
Is the loss of heat, over a 20 minute period of window fanning a few times a week a big deal?
Is there a way for the fan to suck out the smoke without losing too much hot air?
Should I invest in a through the wall vent, and would this be any better than the window fan?