How do I stop drafts coming in through a wall unit heater/ ac.?

We have an old wall unit in our master bedroom. I've seals and caulked all around the inside and outside, but it still has cold air just flowing thorough. We've never felt them before, butthis uear its bad. Taking it out is not an option at the moment. We do not use it.

3 Answers

  • 8 years ago
    Favorite Answer

    tape a piece od plastic to the inside wall and over the unit

  • Anonymous
    8 years ago

    I recommend getting compressible foam insulation (about 1" wide) and use it to make a tighter fit around the air conditioners.

    Source(s): I specialize in HVAC and energy.
  • 8 years ago

    I would cover it up from the outside with something like a tarp. Sealing the tarp around the entire unit and past onto the wall of the building.

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