Reduce Drafts from Pipes

To save energy & reduce drafts, use spray foam or caulk to seal holes around penetrations, such as pipes wiring, vents or recessed lights, that go through the home to the outside, attic, crawlspace, or an unfinished basement.

The exterior of your home — the outer walls, ceiling, windows, and floor— is called the “envelope” or “shell” Sealing & insulating— done by a knowledgeable homeowner or skilled contractor— can save up to 20% on heating and cooling costs (or up to 10% on the annual energy bills) It will also make your home more comfortable and help your heating & cooling system run more efficiently

(Energy star.gov)