Sealing a window AC unit is one of the best "bang for your buck" home improvements you can do. It stops hot air from infiltrating your home, keeps bugs out, and significantly lowers your electricity bill.
Sealing a window AC unit takes less than 30 minutes and costs under $15 in materials. The result: lower energy bills, better cooling performance, and no unwanted drafts or bugs. Follow the steps above, use removable materials, and inspect periodically for best results. how to seal a window ac unit
Properly sealing a window AC unit is a direct way to save on energy costs, improve indoor comfort, and keep out unwanted pests and allergens. By eliminating gaps, you ensure your air conditioner cools the room efficiently rather than working overtime to battle incoming hot air. Essential Materials for a Tight Seal Sealing a window AC unit is one of
Here is a helpful, step-by-step guide to sealing your window AC unit properly. The result: lower energy bills, better cooling performance,
| Item | Purpose | |------|---------| | Foam insulating tape (1–2 inches wide, adhesive-backed) | Sealing gaps between window sash and AC frame | | Weatherstripping (V-seal or felt) | Top and side window gaps | | Heavy-duty plastic sheeting or clear acrylic sheet | Optional for large gaps above unit | | Double-sided tape | Securing plastic sheeting | | Caulk (silicone or rope caulk) | Permanent sealing for stationary parts | | Scissors or utility knife | Cutting foam/tape | | Screwdriver (if using AC bracket/support) | Installing support hardware | | Level | Ensuring AC tilts slightly downward to drain condensation |
Ideal for replacing or reinforcing thin accordion side panels.
It was a sweltering summer day in late August, and Tom was determined to seal his window AC unit to prevent cold air from escaping and hot air from entering. He had just moved into a new apartment and was eager to make it cozy and energy-efficient.