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Fan Coil Unit — Wall-Mounted
APOLLO Wall-Mounted Fan Coil Unit
Fast, simple hydronic heating-and-cooling retrofit with no ceiling access or ductwork.
Size
1.5 Ton (est. 400-900 ft²)
Pipe Configuration
2-Pipe
$874
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Installed in real homes and workshops
Customer Success Stories
I purchased it about four or five years ago. It worked very reliably since then.
1.5-Ton Wall Fan Coil Customer Story
Customer experience with an installed Apollo 1.5 ton wall fan coil.
Product details
- Simple retrofit
- Quiet 3-speed airflow
- Durable construction
- Installer-ready
APOLLO Wall-Mounted Fan Coil Unit
The APOLLO Wall-Mounted Fan Coil Unit is designed for efficient hydronic heating and cooling without ductwork. Its clean wall-mounted design delivers quiet room-by-room comfort, simple installation, and reliable performance for homes, offices, bedrooms, garages, workshops, and light commercial spaces.
Key Benefits
- Wall-mounted design for a clean, space-saving installation
- Designed for hydronic heating and cooling in residential and light commercial spaces
- Compatible with air-to-water heat pump systems and other hydronic setups
- No ductwork required, making installation simpler than traditional forced-air systems
- Ideal for room-by-room comfort in bedrooms, offices, living areas, garages, and workshops
- Quiet operation for comfortable indoor environments
- 3-speed fan control allows adjustable airflow for heating and cooling
- Integrated washable air filter helps simplify maintenance
- Built-in condensate drain pan with flexible drain tubing included for cooling operation
- Durable construction with galvanized steel frame, copper coils, and aluminum fins
- Simple 2-pipe or 4-pipe hydronic installation with standard water connections
- Compatible with standard 24VAC FCU thermostats for system control
Remote control and thermostat not included. Requires a compatible 24VAC FCU thermostat, purchased separately.
| Cooling | 12,000 BTU (1.5T) / 18,500 BTU (3T) |
|---|---|
| Heating | 18,400 BTU (1.5T) / 31,500 BTU (3T) |
| Coverage | 400–900 ft² (1.5T) / 800–1,300 ft² (3T) |
| Power usage | 33 W (1.5T) / 35 W (3T) |
| Airflow | 225–400 CFM (1.5T) / 250–600 CFM (3T) |
| Noise | 33–45 dB (1.5T) / 33–47 dB (3T) |
| Weight | 20 lb (1.5T) / 30 lb (3T) |
| Connections | ½ in NPT |
| Power supply | 120 VAC |
| Thermostat control | 24 VAC |
| Pressure rating | 200 PSI |
- Cooling
- 12,000 BTU (1.5T) / 18,500 BTU (3T)
- Heating
- 18,400 BTU (1.5T) / 31,500 BTU (3T)
- Coverage
- 400–900 ft² (1.5T) / 800–1,300 ft² (3T)
- Power usage
- 33 W (1.5T) / 35 W (3T)
- Airflow
- 225–400 CFM (1.5T) / 250–600 CFM (3T)
- Noise
- 33–45 dB (1.5T) / 33–47 dB (3T)
- Weight
- 20 lb (1.5T) / 30 lb (3T)
- Connections
- ½ in NPT
- Power supply
- 120 VAC
- Thermostat control
- 24 VAC
- Pressure rating
- 200 PSI
What APOLLO Wall-Mounted Fan Coil Unit works with
Complete the system
What This Fan Coil Needs to Work
APOLLO Heat Pump
The heat pump that drives the system
Fan coils need hot or chilled water to run. Our Apollo air-to-water heat pumps supply that water — heating in winter, cooling in summer.
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APOLLO Wi-Fi Thermostat
Smart control for every room
A dedicated fan coil thermostat runs the unit on a schedule and only when there is real demand, reducing energy use and improving room-by-room comfort.
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Multi-zone install
Two fan coils, one heat pump
The Y-connector lets two fan coil units share a single heat pump circuit, expanding whole-home coverage without adding a second outdoor unit.
View detailsComplete the system
We Sell More Than Fan Coils
Hydro Station
A simpler mechanical room
Combines pump, controls, and electric backup into one compact wall station — less loose parts, faster install, cleaner mechanical room.
View details
Water Heater Tank
Hot water from the same system
The combined buffer and indirect tank lets the heat pump supply household hot water with no separate water heater needed.
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Manifold Station
Add radiant floors to the same heat pump
Distributes warm water evenly to each radiant floor loop. Fan coils and radiant can both run from a single outdoor unit.
View detailsAnswers
Frequently asked questions
What size wall fan coil unit do I need?
The Apollo Wall Fan Coil comes in two sizes with estimated coverage guidance: 1.5-ton AP-FCU-18K: 400–900 ft²; 3-ton AP-FCU-36K: 800–1,300 ft². Actual sizing depends on insulation, layout, climate, water temperature, and heat loss. Multiple fan coil units can share one air-to-water heat pump through a common hydronic loop.
What are the heating and cooling capacities of the Apollo wall fan coil?
The 1.5-ton AP-FCU-18K delivers 12,000 BTU of cooling and 18,400 BTU of heating. The 3-ton AP-FCU-36K delivers 18,500 BTU of cooling and 31,500 BTU of heating. Actual output depends on entering water temperature from your heat pump.
Is the Apollo wall fan coil compatible with an air-to-water heat pump?
Yes. It connects to a hot or chilled water loop through ½ in NPT threaded fittings. One heat pump can supply multiple fan coil units simultaneously for multiple zones without refrigerant lines to each room.
What thermostat works with the Apollo wall fan coil?
Any standard 24VAC fan coil unit thermostat is compatible. MBTEK's Wi-Fi Fan Coil Thermostat adds scheduling and remote control. The thermostat controls three fan speeds and switches heating or cooling modes based on water temperature.
How quiet is the Apollo wall fan coil?
The 1.5-ton model operates at 33–45 dB and the 3-ton model at 33–47 dB, depending on fan speed. At low speed, both are quieter than a typical library.
Does the Apollo wall fan coil work with both 2-pipe and 4-pipe systems?
Yes. Selectable 2-pipe and 4-pipe variants are available. A 2-pipe system shares one hot-or-chilled loop; a 4-pipe system uses separate hot-water and chilled-water circuits for simultaneous heating and cooling designs.
What are the water connection requirements?
The wall fan coil uses ½ in NPT threaded supply and return connections and is rated to 200 PSI. Shut-off valves and an air vent are recommended. Insulate supply piping to prevent surface condensation during cooling.
What power does the wall fan coil require?
The 1.5-ton AP-FCU-18K draws 33 W and the 3-ton AP-FCU-36K draws 35 W on 120 VAC. Thermostat control wiring runs at 24 VAC.
How does the wall fan coil compare to a concealed or ceiling cassette FCU, and what's included?
Wall FCUs are visible, surface-mounted, and fastest to retrofit. Concealed FCUs hide above a ceiling and use short ducts; ceiling cassettes mount flush and discharge air four ways. Each wall unit includes a condensate drain pan and 7 ft of flexible drain tubing; thermostat, piping, valves, and air vent are separate.
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