HVAC Installation in Knoxville, TN
A new system here will heat from October through April and cool 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.
Knox County asks for heat and cooling both, all year round
There's no month off here. Homes need heat from October through April, seven months, and cooling from May through September, another five. That covers the whole year.
Winter nights average 31°F from December through February. Summer afternoons average 87°F. A new system has to hold up on both ends. Most homes here heat with electricity, so when the power goes out, the heat goes with it. Knox County has seen 13 winter storms and 181 damaging wind events over the past ten years, and a fifth of Tennessee households went at least 24 hours without power in 2024. That is worth thinking about when you're choosing what replaces your old system.
- 7 months
- October through April, your system heats
- 5 months
- May through September, it cools
- 31°F
- the average winter night it heats against
- 87°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
- When should I replace my HVAC system?
- Replace it when repairs are becoming frequent or a technician has told you a major part is failing on an older unit. Homes here need working heat from October through April and cooling from May through September, so there is no season where the system can sit down for long without someone noticing. A unit that keeps running but takes longer and longer to reach the temperature you set is also telling you it is wearing out. Once repair costs start piling up, ask a contractor to price a replacement instead.
- Should I replace my furnace and air conditioner at the same time?
- If both are old, it usually makes sense to replace them together. A furnace and air conditioner installed at the same time are matched to work as one system, and putting a new unit next to one that is much older often means that older unit fails soon after anyway, so you end up paying for a second installation not long after the first. If only one is actually failing and the other is newer, a contractor can look at both and tell you whether it makes sense to wait. Ask how the two units are matched before you decide.
- What happens during an HVAC installation?
- A contractor removes the old furnace and air conditioner, or heat pump, and sets the new equipment in place, connecting it to the existing ductwork, gas line or electrical circuit. If there is a line set carrying refrigerant between the indoor and outdoor units, that gets connected too. They check the ductwork for leaks or sizing problems, since a new system attached to bad ducts will not perform the way it should. Once everything is connected, the system is fired up and checked for correct airflow, temperature and pressure, and a contractor walks through what was done and what to watch for once it is running.