Our contractor wants to install only two cold air returns in a 2400 square foot first floor. The homes I have owned before had a cold air return in every room. I find that houses with very few large returns are noisy and I would think less efficient in heating and cooling.
What are the design "best practices" for cold air returns besides the return size (square inches) being equal to the supply size?
What are the design "best practices" for cold air returns besides the return size (square inches) being equal to the supply size?