Do you know how your range hood or bathroom exhaust is vented, most people do not however it can make all the difference in the world to do them properly.
Range Hoods we only use solid ductwork, not the cheap flexible ductwork. We prefer to vent these through the roof however we can do side damper’s as well on the side of the home. It’s important to use 6″ ductwork when doing your range hood or microwave, it ensures coupled with the right blower that the smoke you’re creating goes outside and not back into your home.
Bathroom Exhaust we see more often than not that these are just put into the attic without any ductwork. We prefer to use when possible the solid ductwork as well but sometimes situations do not allow. One thing we always try to do is to exhaust these through a damper on the side of your home, not on the roof. The reason we do this is because of the moisture you’re sending out of your home that if you’re trying to blow through the roof it’s not going to make it out but on a slight pitch down on a damper it will leave the home. Water is the worst thing you can keep in your home, it needs to be managed so it’s important to install these properly and vent properly.