Heat Pumps & Heating
Heat pump installation in Miami, sized for cooling first
In Miami a heat pump is an air conditioner that can also run in reverse for the handful of cold nights a year. Sizing it for cooling, not heating, is what makes it work well here.
Miami service office on SW 117th Ave · We answer 24/7
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- Miami service office
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Updated October 2026
Heat pump installation in Miami replaces a straight-cool AC and electric heat strips with a system that cools all year and heats by reversing the refrigerant flow on the few nights that need it. Our SW 117th Ave office sizes it from a cooling load calculation, keeps a small heat kit as backup, pulls the Miami-Dade permit and installs it at or above the Southeast efficiency minimum.
The job
Why most new Miami systems are heat pumps
A heat pump uses the same compressor and coils as an air conditioner, plus a reversing valve that lets it move heat into the house instead of out. In a climate where the air conditioner runs most of the year and heat is needed only occasionally, that turns the equipment you already need into your heating too.
Compared with running electric heat strips on a cold night, a heat pump heats with far less electricity. The heat strips stay as backup, sized small, rather than doing all of the heating.
Your options
Heat pump or straight-cool AC with heat strips
| Heat pump | Straight-cool AC + strips | |
|---|---|---|
| Cooling | Same as an AC of equal efficiency | Same |
| Heating | Efficient, backed by a small heat kit | Electric strips only |
| Up-front cost | Slightly higher | Slightly lower |
For a whole-system replacement the difference is usually small; for a home that never uses heat, the straight-cool system can still make sense.
What moves the price
What decides the price of a heat pump
System size
Tonnage from the cooling load calculation.
Efficiency
Higher SEER2 and variable speed cost more.
Heat kit
Backup strips sized to the heating load.
Air handler
A matched indoor unit for the heat pump.
Thermostat
A heat pump or variable-speed compatible control.
Permit and anchoring
Miami-Dade permit and wind-rated pad hardware.
Duct condition
Leaking or undersized duct adds work.
What we see on this job
Heat pump vs straight-cool AC
A straight-cool AC with electric heat strips is simple and cheap to buy, and in a house that almost never uses heat it can still make sense. A heat pump costs a little more up front, heats more efficiently, and uses the same outdoor unit for both jobs. For most Miami homes replacing a whole system, the price difference is small enough that the heat pump is the better long-term choice. We show both prices side by side so you can decide based on how your household actually uses heat.
Variable-speed heat pumps
Variable-speed or inverter heat pumps change their output continuously instead of switching fully on and off. In Miami that matters more for cooling than for heating: long, slow cycles pull more moisture out of the air, keep temperatures steadier and run more quietly. They cost more than single-stage units and use more sophisticated controls, so they need a thermostat that supports them and a careful installation. We recommend them where humidity is the main complaint or where the household is sensitive to temperature swings.
Heat pump sizing for South Florida
Up north, heat pumps are sized for the heating load, and the cooling capacity follows. In Miami it's the reverse: size for the cooling load, because that's what the system does most of the year, and let a small heat kit cover the rare night the heat pump alone can't. Oversizing for heating produces an oversized air conditioner that short cycles and leaves the house damp. We size from a room-by-room cooling calculation and choose the heat kit from the heating load separately.
Local conditions
How little heat Miami actually needs
Miami drops to 50 degrees or below on only about eight nights a year and reaches 40 degrees about once a year on average, with the coldest days coming in mid-January. That is why a heat pump fits so well here: it heats efficiently on those few nights, and for the rest of the year it simply runs as the air conditioner the house needed anyway.
Step by step
How a heat pump installation runs
- 1
Cooling load calculation
Room by room, sized for summer.
- 2
Heating check
Backup heat kit sized separately.
- 3
Choose the system
Single-stage, two-stage or variable speed.
- 4
Permit applied for
Equipment specs and AHRI numbers.
- 5
Remove the old system
Refrigerant recovered, not vented.
- 6
Install and charge
Anchored, charged and airflow set.
- 7
Test both modes
Cooling and heating run before we leave.
Timing
How long a heat pump installation takes
Most Miami heat pump replacements are finished in one working day, including removal of the old system, installation, charging and a test in both modes. Attic air handlers, duct changes or new electrical work can add a second day, and the county inspection is scheduled afterward.
Brands we service and install
FAQ
Questions Miami customers ask about heat pump installation
For most whole-system replacements, yes. It cools as well as an AC and heats more efficiently than strips.
On a typical Miami cold night, yes, with a small heat kit as backup.
No. In cooling mode it runs like an air conditioner of the same efficiency.
A small kit as backup, sized to the heating load, not the old oversized one.
Yes. Miami-Dade requires a mechanical permit for heat pump installations.
Most replacements take a single day, with the inspection scheduled after.
Same category
Related heat pumps work we handle in Miami
Water-Source Heat Pump Repair
Condo closet and ceiling units, repair or like-for-like replacement.
Heat Pump Repair
Reversing valve problems, defrost board faults.
Heating Repair
Electric heat strip replacement, burning smell on the first cold night.
Replacing your system? Price a heat pump beside the AC
Call the Miami office to book an estimate with a cooling load calculation and both options priced.
