How to stop draft from window air conditioner

Are you tired of the cold drafts seeping through your window air conditioner? Worry not! In this comprehensive guide, we’ll walk you through practical steps to stop those unwanted chills.

Understanding the Draft Issue:

Before diving into solutions, it’s crucial to understand why your window AC might be causing drafts. Common reasons include poor installation, worn-out weather stripping, or gaps around the unit.

Effective Draft Prevention Methods:

1. Reinforce Weather Stripping:

  • Inspect and replace worn-out weather stripping.
  • Ensure a snug fit to prevent air leakage.

2. Seal Gaps Around the Unit:

  • Identify gaps between the AC unit and the window frame.
  • Use weather-resistant sealant to seal any openings.

3. Install Window Insulation Kits:

  • Affordable and easy-to-install kits are available.
  • They create an additional barrier against drafts.

4. Use Draft Stoppers:

  • Place draft stoppers along the bottom of the window.
  • This simple solution can make a significant difference.

5. Consider Thermal Curtains:

  • Invest in curtains designed to insulate against temperature changes.
  • Close them during colder periods to keep drafts at bay.

Stephani (she/her) serves as the Executive Director of Strategy and Operations at, where she conducts comprehensive research, testing, and analysis of fabric-based products spanning sheets, mattresses, towels, pillows, fitness apparel, and other clothing items..Read more

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