HVAC Installation in Farmington, MO
A new system here will heat from October through April and cool from June through September every year. Tell us about the house, and a licensed contractor who covers St. Francois County will get in touch.
Tell us about the job
It takes about a minute.
A system that works nearly all year here
Farmington needs heat from October through April and cooling from June through September. That is 11 months with a furnace or an air conditioner running. Winter nights average 25°F, so a new furnace needs to hold up to a long, cold season, not just a few cold snaps. Summer afternoons average 86°F, and the air conditioner has to answer that heat for four straight months.
Most homes here heat with electricity, and the power does not always stay on. In Missouri, 19% of households went at least 24 hours without power in 2024, and the area has seen 7 winter storms and 54 damaging wind events over the past ten years. A new system installed here should be sized and set up for that, not just for a mild stretch of weather.
- 7 months
- October through April, your system heats
- 4 months
- June through September, it cools
- 25°F
- the average winter night it heats against
- 86°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
- When should I replace my HVAC system?
- Age and repair history tell you more than any single breakdown. Once a furnace or air conditioner is old enough that a major repair costs nearly as much as new equipment, replacing it is usually the better move. Watch for signs like rising bills, uneven heating or cooling room to room, or a contractor telling you a part is no longer made. With heat needed here from October through April, a furnace that struggles in December is worth replacing before it fails on a 25°F night.
- Should I replace my furnace and air conditioner at the same time?
- If both are old, yes, it usually makes sense. A furnace and air conditioner installed years apart can end up mismatched, and the newer one won't run at its rated efficiency paired with an old unit. Homes here need heat or cooling 11 months of the year, so both systems see heavy use and tend to wear out around the same time anyway. A contractor can look at the age and condition of each and tell you whether replacing one now and the other later makes sense for your house.
- What happens during an HVAC installation?
- A contractor removes the old furnace, air conditioner, or both, then sets the new equipment in place and connects it to the existing ductwork, gas line, refrigerant lines, and electrical. They test the system, check refrigerant charge and airflow, and walk through the thermostat settings with you. A contractor can give you a timeline once they've seen the house and the job.