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BobVila.com > Channels > HVAC > All Tips > Exterior Caulking Small openings on the exterior of your home can allow for significant energy loss. Caulk around openings for electric, gas, oil and water supply lines, drainage pipes, plumbing for outside spigots, cable TV and telephone cables. Dryer vents, mechanical ventilation system vents and combustion air supply vents for furnaces should also be sealed. Related Showrooms A.I.M. Radiant Heating - Clean, Quiet, Efficient Heating Intelligent Warmth - The Value and Benefits of Today's Oilheat Sears - Heating & Cooling Repair InsWeb - Lower Your Homeowners Insurance Bill up to 25% Online |