3 Ways to Visualize Square Feet – wikiHow, Picture 400 square feet as a two car garage. A 400 square foot space will be roughly the size of a typical two car garage. You can imagine the space being large enough to fit two cars with a small amount of wiggle room.
How to Measure Your Home’s Square Footage, To measure a home’s square footage, sketch a floor plan of the interior. Break down the sketch into measurable rectangles. Go through the house measure the length and width of each rectangle, then multiply the length by its width. Add up the square footage of all the rectangles to get the home’s total square footage.
How to Determine Duct Size Per Room | Hunker, In order for your forced air furnace to work properly, you have to have the right sizes of duct vents in each room expelling air. The duct vent size will depend on the size of the furnace and the size of your home, so you know how many vents you need in each room. The furnace’s British thermal