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Air Handling Unit — Residential / Light Commercial
Central ducted heating and cooling from hot or chilled water—without refrigerant lines inside the building.
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I installed the Apollo wall fan coil in our living room and I couldn't be happier. It's incredibly quiet—you barely notice it's running—yet it heats the space up super fast. Plus, the clean white design looks great on the wall.
Whisper-Quiet Comfort
A sleek, modern design that blends perfectly into any room.
High-performance hydronic air handler designed for residential and light commercial central duct systems, delivering efficient heating and cooling with quiet operation and seamless APOLLO heat pump integration.
| Application | Residential and light commercial ducted systems |
|---|---|
| Nominal airflow | 1,400 CFM (400 CFM/Ton) |
| Hydronic coil | 22 × 22 × 5 in, up to 193,600 BTU |
| Recommended flow | 17.6 GPM minimum |
| Fan motor | 800 W high-efficiency, factory-preset |
| Filter | 24 × 24 × 1 in MERV 8 pleated, 2-pack |
| Connections / power | 1 in FPT / 220V, 60Hz, 15A breaker |
| Flow direction | Upflow standard; downflow/sideflow special order |
| Functions | Heat and cool |
Answers
The 3.5 Ton (1,400 CFM) suits most residential and light commercial ducted systems. The 6 Ton (2,400 CFM) serves larger homes and light commercial spaces. The 25 Ton is for large commercial buildings. Confirm every choice with a load calculation.
The 3.5 Ton delivers 1,400 CFM with a 22 × 22 × 5 in coil rated up to 193,600 BTU. The 6 Ton delivers 2,400 CFM at 2.0 in. w.g. with a 20 × 32 × 6 in coil rated up to 460,000 BTU. Actual output depends on entering water temperature.
The 3.5 Ton and 6 Ton use 220V / 60Hz power. The 3.5 Ton requires a 15A breaker and the 6 Ton a 60A breaker. Confirm wiring and breaker sizing against the current manual and local code.
The 3.5 Ton and 6 Ton use 1 in FPT supply and return connections. Recommended minimum flow is 17.6 GPM for 3.5 Ton and 21.2 GPM for 6 Ton. Install shutoffs and air venting and insulate cooling supply piping.
Yes. Every APOLLO Central AHU is hydronic and designed around the APOLLO Air to Water Heat Pump, using hot or chilled water at its coil to condition ducted air.
The line supports smart thermostat control and pairs with the APOLLO 24VAC FCU thermostat. It manages heating/cooling changeover and fan operation from heat-pump water temperature and zone demand.
All three heat and cool. The 6 Ton and 25 Ton additionally publish humidification, dehumidification, backup heating, and evaporative cooling. The 3.5 Ton publishes heating and cooling only.
Upflow discharges at the top; downflow discharges at the bottom. The 3.5 Ton and 6 Ton ship upflow, with downflow and sideflow available by special order.
Yes. The APOLLO Central AHU can reuse or modernize an existing duct network while replacing an indoor refrigerant circuit with hydronic heating and cooling.
The 3.5 Ton uses a 24 × 24 × 1 in MERV 8 pleated filter; the 6 Ton uses a 20 × 24 × 2 in MERV 8 pleated filter. Maintain filters, grilles, coil, condensate drain, and any evaporative-cooling components regularly.
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Need an installer?We made it easy for you.
Listed installers are independent contractors, not MBTEK employees. They're skilled professionals familiar with our products and capable of efficient installation.
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