Heat Pumps · Festus, MO & the St. Louis Metro
One system, heating and cooling both — installed and serviced the Exact way
Exactly what's wrong. Exactly what it costs. In writing.
A heat pump does the job of a furnace and an air conditioner in one system. ExactAir installs, repairs, and maintains heat pumps built for Missouri’s real winters — cold-climate models and dual fuel setups included — with an exact diagnosis and exact price before any work begins.
Veteran-Owned · Family-Owned · EPA Certified · Fully Insured · Est. 2025
How do you know your heat pump needs attention?
A heat pump runs differently than a furnace or a straight AC system, so its warning signs look a little different too:
- Weak heating or cooling, or rooms that never reach setpoint
- Heavy ice buildup on the outdoor unit that doesn’t clear on its own
- The system runs constantly without shutting off in cold weather
- Auxiliary or emergency heat seems to run more than it should
- Grinding, clicking, or rattling from the outdoor unit
- Your electric bill has jumped with no change in habits
Heat pump services in Festus & Jefferson County
Every job starts with an exact diagnosis before any repair, and exact pricing before any install.
Heat Pump Installation
New heat pumps sized to your home, with airflow, charge, and controls verified at commissioning — not sold off a price list.
Heat Pump Repair
Real gauge readings and diagnostics find the actual cause of a heating or cooling problem, with the exact price shown before any repair starts.
Heat Pump Replacement
When a system is done, you're shown the repair option and the replacement option side by side, with real pricing on each.
Dual Fuel Sytems
A seasonal tune-up catches a low charge, a failing defrost control, or a weak capacitor before it becomes a breakdown in extreme weather.
Cold-Climate Heat Pumps
Built to keep heating efficiently well below freezing — where a standard heat pump starts to lose ground.
Mini-Split Heat Pumps
Ductless heating and cooling from a single system — a good fit for additions, garages, and homes without existing ductwork.
Heat Pump, Furnace, or both?
Jefferson County sits in a mixed climate, so there’s a real answer here — not a one-size-fits-all pitch.
Heat Pump
- Heats and cools from one system
- Typically costs less to run in mild-to-moderate cold
- A cold-climate model keeps that efficiency into deep winter
- A standard model loses efficiency in extreme cold
Furnace
- Consistently powerful heat, regardless of outdoor temperature
- Doesn't handle cooling — a separate AC system is still needed
- Often the better standalone choice in the coldest stretches
- Runs on electric, oil, or propane — see our Heating page.
Or don’t choose — run both with a dual fuel system
A dual fuel system pairs a heat pump with a furnace. The heat pump handles heating and cooling most of the year, efficiently, and the furnace automatically kicks in only when it’s cold enough that it can do the job better. It’s the setup ExactAir recommends most often for this area.
The ExactAir Method, applied to heat pumps
The same six-step process as any AC or heating visit — because a heat pump is really both at once.
1 - 2
Exact Diagnosis & Findings
Real refrigerant charge, defrost cycle, and electrical readings — not a guess about heating or cooling performance.
3 - 4
Exact Options & Pricing
Repair vs. replace, cold-climate vs. standard, standalone vs. dual fuel — laid out honestly, priced before work starts.
5 - 6
Exact Testing & Verification
Both the heating and cooling sides are tested and confirmed working to spec before the job is called finished.
Why Jefferson County homeowners choose ExactAir
An exact diagnosis in writing
You see what was checked, what was found, and what it costs before any decision gets made.
Real measurements, not guesswork
Actual equipment readings and a documented checklist drive every recommendation, not instinct.
No pressure toward replacement
If a dependable repair makes sense, that's what gets shown to you — not automatically the new system.
Work completed to the proper standard
Repairs and installs follow manufacturer requirements and get tested before the job is called finished.
“The technician found what others couldn’t. He was timely and professional. Pricing was easily affordable! I will definitely be using them again for a new split system install. And would recommend to everyone!!”
From a repair visit — James went on to say he’d be back for a mini-split install next, which is exactly the kind of system covered on this page.
Serving businesses in Festus & Jefferson County, MO
ExactAir is based in Festus and works throughout Jefferson County and the surrounding St. Louis Metro area, generally within about 45 minutes of Festus.
Good to know before you call
A trip fee applies past the standard service radius. Service inside St. Louis city and St. Louis County is currently limited, pending additional licensing there.
Heat Pump FAQs
Do heat pumps work in cold Missouri winters?
A cold-climate heat pump does, well below freezing. A standard heat pump loses efficiency once temperatures drop into the 20s and below, which is exactly why cold-climate models and dual fuel setups exist for this area.
What is a dual fuel heating system?
A dual fuel system pairs a heat pump with a furnace. The heat pump handles heating and cooling most of the year, efficiently, and the furnace automatically takes over only on the coldest days when it can heat the home more effectively than the heat pump alone.
Is a heat pump more efficient than a furnace?
For most of the year in this climate, yes — a heat pump moves heat rather than generating it, which typically costs less to run than a furnace. In the coldest stretches, a standard heat pump’s efficiency drops, which is where a cold-climate model or a dual fuel system comes in.
Do you install geothermal heat pumps?
No, ExactAir does not currently install geothermal systems. We do install and service air-source heat pumps, including cold-climate and dual fuel setups.
Do you service mini-split heat pumps?
Yes, both single-zone and multi-zone mini-split heat pumps, which provide heating and cooling from the same ductless system — a good fit for additions, garages, or a home without existing ductwork.
Do you offer emergency heat pump repair?
Yes, 24/7 emergency service is available. Call or text (314) 893-4707 any time.
One system, done right — heating and cooling both.
Monday–Friday, 7am–7pm · 24/7 emergency service available
