Air conditioning · St. Louis
AC Installation & Replacement in St. Louis, MO
When an air conditioner stops keeping up with a St. Louis July, patching it one more time is rarely the right call. We size the replacement to your house — not to the biggest box on the truck — and quote it before anything comes out.
- Load-calculated sizing, not a guess from the old nameplate
- Repair considered first — replacement only when it's genuinely cheaper
- Written price before the old unit is disconnected
The systems we install
Every home on our list gets matched to equipment that fits its ductwork, layout and budget — not a single brand we happen to stock.
Central air conditioning
Full-home cooling tied into your existing ductwork, balanced so the back bedroom keeps up with the living room.
Ductless mini-splits
For additions, attic conversions, and older St. Louis houses that never had ducts run to begin with.
Heat pumps
Heating and cooling from one system, with efficiency levels that make sense for Missouri winters.
Thermostats & controls
Programmable and smart controls set up properly, so the new system actually runs the way it was designed to.
Signs it's time to replace instead of repair
We'd rather fix what you have. These are the cases where a replacement is the cheaper answer over the next few summers.
12–15 years and climbing
Efficiency drops and parts get harder to source as a system ages past its design life.
Repairs are stacking up
When one repair approaches half the cost of a new system, the maths stops working.
R-22 refrigerant
Phased-out refrigerant makes every leak repair disproportionately expensive.
Rooms that never cool
Persistent hot rooms often mean the system was undersized or badly matched from day one.
Summer bills climbing
A worn compressor draws more power for less cooling every season.
Failures more than once a season
At that point the reliability simply isn't there.
Why homeowners have us do the install
Locally owned
ECO-AIR is based on Delmar Blvd. The owner answers for the work.
No subcontracted crews
The person who quotes the job is on site while it's installed.
Brand-neutral
We recommend the equipment that suits the house, not the one with this month's spiff.
Clean commissioning
Charge, airflow and safeties verified and written down before we leave.
AC installation
questions.
It depends on system type, home size and whether ductwork needs work. We give you a written price after seeing the house — no phone-quote guesses that change on installation day.
Most straight central air replacements are a single day. Mini-splits are often quicker; first-time central air with new ductwork takes longer, and we'll tell you the timeline up front.
Sizing comes from a load calculation — square footage, insulation, windows, ceiling height and duct capacity. Oversized systems short-cycle and leave the house humid, so we don't round up for comfort.
Yes. Seasonal maintenance keeps the warranty intact and catches small faults before they become weekend emergencies.
Other services