do i need a spacer for 20x27x2 air filter loose fit problem

If your 20x27x2 air filter rattles or slides around inside the return vent, you are not alone. At HVACHaven, we have helped thousands of homeowners troubleshoot this exact problem, and in our experience, the root cause almost always comes down to one thing: a mismatch between the filter’s actual dimensions and the return vent opening. … Read more