Is installing a venting skylight to release hot air from my a home a good idea?
I own a 100-year old two story semi in Toronto. The attic is very well insulated and vented. The second story builds up heat during the night. We only use the central AC a few days a year on the on the really hot days. The rest of the time I wish I could vent out the hot air and draw in the cooler night are thru open windows. Is it a good idea to use a venting skylight or someother similar vent product to accomplish this? Many thanks for your help
Fred van Velsen
Skylights have a lot of drawbacks that are not always considered before they are purchased and installed. Yes, they can be used for ventilation, as all windows can, but are they really the best way to ventilate? Check this page first –
Are skylights an asset or a liability?
There is a lot of heat loss associated with skylights, and while they can be a great way to let hot air escape in an effort to reduce the burden of your air conditioning system, those savings may well be negated by higher heating bills as well as direct sunlight and heat streaming in through that very skylight you hoped would help cool your house. So the net result may in fact be more energy consumption, not less.
There is no escaping the fact that they can improve quality of life by providing a lot of natural light to homes, but durability issues often arise, along with higher energy bills. The net result of a skylight can be nicer brighter room, but it inevitably comes with additional energy costs and often costly maintenance issues from water damage, whether that is due to leaking or condensation on the inside. Have a read on that article and let us know what you think, we are happy to help you work out passive ventilation and cooling suggestions.
Here is another article that will help you a lot I think -
How to keep a house cool with no air conditioning