A snow-covered suburban yard and driveway viewed through a frost-edged residential window during an active snowstorm.

HVAC Installation in Jefferson City, 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 Cole County will get in touch.

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment
An unfinished basement featuring concrete block walls, exposed floor joists, and a metal forced-air furnace with ductwork near a central pillar.

A system that has to work almost year round

A new furnace here runs from October through April. A new air conditioner runs May through September. Between the two, whatever you install is working seven months for heat and five for cooling, which covers the full year.

Winter nights average 25°F in Cole County, and summer afferences average 87°F. That is the range a new system has to handle, cold starts on one end and long cooling stretches on the other. 56% of homes here heat with electricity, so a furnace or heat pump sized right for those winter lows matters more than it would somewhere milder.

7 months
October through April, your system heats
5 months
May through September, it cools
25°F
the average winter night it heats against
87°F
the average summer afternoon it cools against
Isometric line illustration of a cutaway single-story house showing interior rooms with furniture, ceiling ductwork, and an exterior furnace unit with a tall flue pipe.
Your system heats October through April and cools May through September.

NOAA nClimDiv, 1991–2020 normals

When should I replace my HVAC system?
Replace it when repairs start costing more than they're worth or the system can't keep up anymore. A furnace with a cracked heat exchanger or an air conditioner with a failed compressor usually isn't worth fixing, especially once the unit is old. Watch for other signs too. Rooms that won't hold temperature, a furnace that runs almost nonstop through the winter, or an air conditioner that struggles on the hot afternoons here all point to a system on its way out. A contractor can look at the age and condition of your system and tell you whether repair still makes sense.
Should I replace my furnace and air conditioner at the same time?
If both are old, replacing them together often makes sense, but it depends on the condition of each one. A furnace and air conditioner installed at the same time tend to wear out around the same time, so if your furnace is failing, your air conditioner may not be far behind. They also share the blower and ductwork, so matching a new unit to an old one can mean the new equipment never runs the way it was designed to. A contractor can check both systems and tell you whether one needs to go now or if it makes sense to wait.
What happens during an HVAC installation?
A contractor removes the old equipment, sets the new furnace or air conditioner in place, and connects it to your ductwork, electrical, and for gas furnaces, the gas line. Refrigerant lines get connected and checked for leaks, the electrical and gas connections get tested, and the system gets run through a full cycle to confirm it heats or cools the way it should. The contractor also checks the thermostat and the airflow at the vents before calling the job done. What the work involves and how long it takes depends on your home and equipment, so a contractor will walk you through the specifics for your house.