Forced air systems and the duct work required to move that air are complex systems. They require a great deal of calculation to size correctly so that they operate properly and efficiently. If a duct run isn't sized correctly you can have a room which doesn't get enou...

For those of you that are building nerds like me, here are a few videos from Building Science Laboratories on... you guessed it building science principles.

 

From Ice dams, to vapour barrier vs. air barriers, to managing humidty, to insulating in cold climates.

 

http://l...

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