Closing your cooler vents in the ceiling or walls is not going to stop heat loss - just slow it down a little. Cover your vents so that you eliminate heat loss via draughting. You'll get a payback usually in one season as your home will be quicker to heat and stay warmer longer letting your heating system take a breather:
Make sure you select the correct AC-Draftshield for your vent. This involves measuring two sides of the vent. You should measure all vents in your home as often vents can be of different sizings although they may look similar.
Measure square and rectangular vents the same way.
Ac Draftshields have been applied across many industries to seal off vents and associated duct work. Whether it is for winterization, energy audits, duct cleaning, containment of asbestos, smoke, or debris from renovation, our covers are the instant reusable HVAC seal for you.
A typical family spends about a third of its annual heating and cooling budget on air that leaks into or out of the house through unintended gaps and cracks.