AC Installation in Knoxville, TN
A new air conditioner in Knoxville will run from May through September every year. Tell us about the house, and a licensed contractor who covers Knox County will get in touch.
Tell us about the job
It takes about a minute.
Five months of Knoxville heat, on one system
Your air conditioner in Knox County works from May through September, five months of the year. Summer afternoons here average 87°F, and it has to hold the house steady through all of them.
Knox County also sees storms come through, with 181 damaging wind events and 28 hail events recorded over the past ten years, some hail stones as big as 1.75 inches. Whatever gets installed sits outside through that. If it is new, it has to meet the federal minimum of 14.3 SEER2, the efficiency standard for central air conditioners built since 2023.
- 5 months
- May through September, your air conditioner is on duty
- 87°F
- the average summer afternoon it cools against
- 28 hail events
- in ten years, and hail bends the fins on outdoor coils
- 13.4 SEER2
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
Going above the federal minimum saves little here, about $20 a year.
Estimates for a typical Knox County home, from EIA household energy data, Tennessee fuel prices and NOAA climate normals. Your home will differ.
- What size air conditioner does my house need?
- There is no single size that fits every house, and picking one off a chart is how you end up with a unit that runs too long or shuts off too soon. The right size comes from a load calculation that looks at your square footage, insulation, window area and layout, not just the size of the unit you have now. A contractor can run this calculation for your house and tell you the tonnage it actually needs.
- Should I replace the whole system or just the outdoor unit?
- If your indoor coil and outdoor unit were installed at different times, replacing only the outdoor unit can mean matching a new compressor to an old coil that was never designed to work with it. That mismatch can hurt efficiency and shorten the life of the new equipment. A contractor can check whether your indoor coil is compatible with a new outdoor unit before you decide, and can also tell you whether your current system meets the 14.3 SEER2 minimum that applies to new equipment now.
- Do HVAC contractors in Knoxville need a state license to work on my home?
- Ask to see a contractor's license number before any work starts on your home. A licensed contractor can show you that number without hesitation, and it is worth checking before you agree to any job.