AC Installation in Johnson City, TN
A new air conditioner in Johnson City will run from June through September every year. Tell us about the house, and a licensed contractor who covers Washington County will get in touch.
Tell us about the job
It takes about a minute.
Four months of real heat in Johnson City
Summers here run June through September, with afternoons averaging 85°F. That is the stretch your air conditioner has to answer for, day after day, and a unit that is undersized or on its way out will show it fast.
Washington County has also seen its share of hail and wind over the past ten years, so whatever gets installed outside needs to hold up where it sits. If the unit going in is new construction, it has to meet the federal minimum of 14.3 SEER2.
- 4 months
- June through September, your air conditioner is on duty
- 85°F
- the average summer afternoon it cools against
- 14 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 Washington 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?
- It depends on your square footage, your ceiling height, how much shade and window area you have, and how well the house holds cold air. Two homes the same size can need different sized units for these reasons. A contractor works this out with a load calculation rather than a rule of thumb, because a unit that's too big will cool the air fast but leave the house damp, and one that's too small will run all day in summer and still not keep up.
- Should I replace the whole system or just the outdoor unit?
- If your indoor coil and outdoor unit are matched from the factory, replacing only the outdoor unit can throw off that match and hurt both efficiency and how long the new unit lasts. It also depends on the age and condition of what's inside, and whether the refrigerant type still lines up with what's available now. A contractor can look at both halves of your system and tell you whether the indoor coil is worth keeping or whether it makes more sense to do the whole system at once.
- Do HVAC contractors in Johnson City need a state license to work on my home?
- A licensed contractor is who should be doing this work, and asking to see that license before work starts is reasonable. It's what stands behind the installation if something goes wrong later. A contractor can show you their license and walk you through what it covers.