HVAC Installation in Florissant, MO
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 St. Louis County will get in touch.
Tell us about the job
It takes about a minute.
A system that has to work most of the year in Florissant
Your furnace and your AC both earn their keep here. Winters bring nights averaging 26°F from December through February, and summer afternoons run 87°F, so there's really only a short stretch in spring and fall when neither one is running. Most homes in the area heat with gas, and whatever you install needs to hold up through a full season on each end, seven months of heat and five of cooling.
The area sees its share of rough weather too. Over the past ten years, this part of Missouri has had 9 winter storms and 108 damaging wind events, and last year nearly one in five households here lost power for at least 24 hours. A new system should be set up to come back on its own once the power does, without someone having to walk out and relight it.
- 7 months
- October through April, your system heats
- 5 months
- May through September, it cools
- 26°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?
- Look at how it's been running, not just the calendar. If your furnace or air conditioner is breaking down more than once a season, or a repair quote is running close to what a new system costs, replacing it makes more sense than sinking more money into it. Homes here need heat from October through April and winter nights average 26°F, so a furnace that's struggling now will only get worse as the season goes on. A contractor can look at the condition of your equipment and tell you honestly whether it's worth repairing again.
- Should I replace my furnace and air conditioner at the same time?
- If both are old and worn down, it usually makes sense to do them together. A furnace and air conditioner installed at the same time are matched to work with each other, and a contractor handles your ductwork and electrical connections as one job instead of coming back for a second. If one unit is much newer than the other, there's no reason to replace the newer one early just to match it. A contractor can look at the age and condition of both and tell you if pairing them makes sense for your house.
- What happens during an HVAC installation?
- A contractor removes the old furnace and air conditioner, or whichever unit is being replaced, and sets the new equipment in place. They connect it to your ductwork, wiring, and refrigerant lines, then check the gas line and venting if a furnace is part of the job. Once everything is connected, they test the system, checking airflow, temperature output, and that the thermostat is talking to the new equipment correctly. The job gets inspected before it's considered finished, since a furnace has to be vented and wired correctly to run safely.