Cost to Install a Window Air Conditioner
Installing a window air conditioner means mounting the unit on the sill with support hardware, fastening it to the window frame, fitting its accordion side panels, and weather-stripping the remaining gaps. The work is straightforward when the opening, window type, and sill can support the unit, but safe lifting and a secure fit matter.
Common reasons homeowners do this job
- A room needs cooling from a window unit.
- A homeowner is adding a window air conditioner.
- An existing window air conditioner is worn or damaged.
- A homeowner is upgrading a window air conditioner.
DIY or call a pro?
This is a DIY-friendly installation, but consider a professional if lifting the unit, installing the mounting bracket, or securing it to the window frame feels uncomfortable. Get help from a second person for a heavy unit, and keep your body inside the window during installation. The unit needs to be securely fastened so it stays in the window.
Frequently asked questions
- Can I install a window air conditioner myself?
- Yes, provided the window opening fits the unit, the mounting hardware works with the window type, and the window frame and sill can carry the unit's weight. A screwdriver, drill, level, tape measure, utility knife, and putty knife are used for the installation. Consider hiring help if the unit is heavy or if securing the bracket and unit feels uncertain.
- What makes a window air conditioner installation cost more?
- The price can rise with the number of window air conditioner units, the labor time involved, and the materials needed, including mounting hardware, screws, and weather stripping. A small job may also include a minimum or trip charge.
- What should I check before installing a window air conditioner?
- Measure the window opening first, then confirm that the window type is compatible with the unit's mounting hardware. Verify that the window frame and sill can support the unit's weight, and read the manufacturer's installation instructions for that model before starting.
- How do I keep a window air conditioner secure and sealed?
- Install the mounting bracket or support hardware on the sill, secure the unit to the window frame with the provided screws, and fasten the accordion side panels to the frame. Lower the sash onto the top of the unit and apply weather stripping to gaps between the window and unit. Use a second person for heavy lifting and avoid leaning out of the window.
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