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Stay Cool This Summer - 20% OFF Free Shipping 00d : 00h : 00m : 00s
APOLLO Concealed Fan Coil
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Complete the system
What This Fan Coil Needs to Work
A fan coil circulates hot or chilled water — it cannot run on its own. Here are the three components that typically complete a fan coil install.
APOLLO Heat Pump
The heat pump that powers this unit
Fan coils circulate hot or chilled water — they cannot run on their own. Our Apollo air-to-water heat pumps supply that water and drive heating in winter and 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.
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Shop complete systems
We Sell More Than Fan Coils
Many customers start with a fan coil and end up building a complete hydronic system. See everything we carry to heat, cool, and supply hot water from one outdoor unit.
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.
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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.
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APOLLO Concealed FCU
Main Features
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Efficient heating and cooling
3-speed fan delivers steady air movement for quiet everyday comfort.
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Quick installation
Selectable 2-pipe or 4-pipe hydronic setup with pre-drilled hanging points speeds up installation.
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Space-saving design
Horizontal concealed layout hides neatly in the ceiling and keeps living space clear.
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Durable construction
Galvanized steel housing with copper-aluminum coil is built for long service life.
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Quiet performance
Low operating sound keeps heating and cooling discreet in occupied rooms.
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Condensate management
Built-in drain pan and flex tubing help manage condensate cleanly.
Quick installation
Flexible 2-pipe or 4-pipe hydronic configurations and pre-drilled mounting points help contractors install the unit quickly.
Space-saving design
The concealed ceiling form factor preserves wall and floor space while keeping the room clean-looking.
Efficient climate control
Three fan speeds support steady heating and cooling performance across a wide range of rooms.
Condensate management
Integrated condensate drainage hardware helps keep installation tidy and simplifies service.
Technical Specifications
| Model range | 1.5T, 3.5T, 6T |
|---|---|
| Estimated coverage | 1.5 Ton: 400-900 ft²; 3.5 Ton: 1,000-1,700 ft²; 6 Ton: 1,700-2,800 ft² |
| Cooling capacity | 11-37 KBTU |
| Heating capacity | 18-60 KBTU |
| Air flow | 320-1260 CFM |
| Power input range | 16.7-155.5 W |
| Noise range | 18-51 dB(A) |
| Water flow | 2.62-8.15 GPM |
| Weight | 26.7-56.2 lb |
| Installation type | Horizontal concealed ceiling |
| Pipe configuration | 2-pipe and 4-pipe variants available |
| Control compatibility | Standard 24VAC FCU thermostat |
| Construction | Galvanized steel housing with copper-aluminum coil |
For complete technical data including heating/cooling performance tables, refer to the product manual.
Product documents
Download the concealed FCU manual for installation guidance, dimensions, and simplified technical reference data.
APOLLO Concealed Fan Coil Manual
Installation details, dimensions, and technical data for the concealed FCU lineup.
Product details
APOLLO Horizontal Concealed Hydronic Fan Coil Unit
The APOLLO Horizontal Concealed Hydronic Fan Coil Unit is designed for hidden ceiling installation, delivering quiet and efficient hydronic heating and cooling with clean, discreet integration. Available in 1.5 Ton, 3.5 Ton, and 6 Ton capacities, it is ideal for residential, condo, office, and light commercial HVAC applications.
Key Benefits
- Horizontal concealed installation for a clean, modern interior design
- Designed for hydronic heating and cooling applications
- Compatible with air-to-water heat pump systems
- Quiet operation for discreet comfort in residential and commercial spaces
- EC motor with efficient variable-speed performance
- Simple 2-pipe or 4-pipe system for easy and flexible installation
- Air outlet plenum design supports ducted supply installation
- Durable construction with galvanized steel housing and copper-aluminum coil
Thermostat and remote control not included. Requires a compatible FCU thermostat.
Concealed Fan Coil FAQ
APOLLO Concealed Fan Coil Frequently Asked Questions
Answers about concealed fan coil sizing, installation, hydronic compatibility, airflow, controls, and maintenance.
What is a concealed fan coil unit?
The APOLLO Concealed FCU is a hidden fan coil unit installed above a ceiling or soffit. It uses a fan and hydronic coil to heat or cool room air, then connects to hot or chilled water from a heat pump, boiler, or chiller.
How does a concealed fan coil work?
A concealed fan coil pulls return air from the room, moves it across a hot-water or chilled-water coil, then sends conditioned air through a short duct or outlet plenum. Water temperature, water flow, and fan speed determine the final heating or cooling output.
What size concealed FCU do I need?
Use estimated coverage guidance as a starting point: 1.5 Ton: 400-900 ft²; 3.5 Ton: 1,000-1,700 ft²; 6 Ton: 1,700-2,800 ft². Actual sizing depends on insulation, layout, climate, ceiling height, duct design, water temperature, and heat loss.
Is this a horizontal concealed fan coil unit?
Yes. The APOLLO Concealed FCU is a horizontal concealed ceiling fan coil unit intended for above-ceiling or soffit installation. Plan service access so filters, piping, wiring, and condensate components can be reached after installation.
Can it work with an air-to-water heat pump?
Yes. The concealed FCU is designed for hydronic systems and can connect to an air-to-water heat pump using selectable 2-pipe or 4-pipe variants. A 2-pipe system shares one hot-or-chilled water loop, while a 4-pipe system uses separate hot-water and chilled-water circuits for system designs that need simultaneous heating and cooling.
Is it for heating, cooling, or both?
It can support both heating and cooling. In heating mode, hot water runs through the coil. In cooling mode, chilled water runs through the coil. Performance depends on entering water temperature, water flow, controls, and the final hydronic design.
What is the difference between concealed, wall, floor, and ceiling cassette FCUs?
A concealed FCU hides the equipment and uses short ducting or grilles for a cleaner room appearance. A wall FCU is usually the fastest retrofit. A floor FCU sits low on a wall or floor area. A ceiling cassette mounts in the ceiling and distributes air in multiple directions.
Does a concealed FCU need ductwork?
Yes, most concealed fan coil installations use short supply and return ducting or an outlet plenum. It is not the same as whole-house ductwork; it is local zone distribution from the hidden unit to room grilles or diffusers.
What thermostat or controls does it use?
The APOLLO Concealed FCU is listed with standard 24VAC FCU thermostat compatibility. Thermostat and control wiring must match the selected model, fan-speed setup, and hydronic layout, so the installer should confirm control requirements before wiring.
What should I plan before installation?
Plan ceiling space, service access, condensate drainage, supply and return piping, pipe insulation for cooling, electrical and control wiring, air outlet and return layout, and clearance for future maintenance.