It may seem like extra work, but taking the time to remove the A/C unit from your window prevents cold air from sneaking through cracks. If you can't manage to remove it, invest in a heavy tarp to cover the unit during the winter.
Related: Bob Vila's 10 "Must Do" Projects for December
Honeywell RTH2300B1012/E1 ... $16.75
Stansport #T-810 Reinforce... $8.99
Dap 18001 Kwik Seal Caulk ... $1.18
Hampton Bay Hugger 52 In. ... $44.99
Michigan Peat 2750 Leisure... $30.58
Hausbell 7W Ultra Bright M... $6.99
BLACK+DECKER LDX120C 20-Vo... $48.00
Custom Leathercraft 125M H... $9.52
Safe Paw Non-Toxic Ice Mel... $15.50
WORX 16-Inch 14.5 Amp Elec... $91.11
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