Liquid-to-Air and Water
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TF Series -
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TF Series Service Door Open
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Nordic® TF Series
Our geothermal liquid-to-air and water heat pump is called the Triple Function Series, or TF Series. It is essentially a liquid-to-air heat pump and a liquid-to-water heat pump in a single machine. The TF Series provides hot water for radiant in-floor heat, forced air heating and cooling, and domestic hot water, all in one machine. The TF Series works as part of an open or closed loop geothermal system.
NEW IN 2025: The R454b TF-Series can now cool air and heat water simultaneously, bypassing the ground loop and effectively doubling the summertime COP (efficiency).
How It Works
Air heating and cooling are provided via an air duct system controlled from a central thermostat. When the desired air temperature is reached and the thermostat is satisfied, the unit can automatically switch to its hydronic (in-floor water) heating mode. It then supplies hot water to an in-floor heating system, swimming pool, or any other hot water requirement. The TF Series can also be set to hot water priority instead of hot air priority.
The TF Series is the perfect solution for a home that has in-floor heating in part of the house (usually in the basement and first floor) but also has ductwork for cooling the whole home and heating the second floor. This versatility makes the TF Series popular for new construction homes.
Quick Facts About Our Liquid-to-Air & Water Heat Pump
| Quick Facts | |
|---|---|
| Distribution Type | Forced Air and Radiant In-Floor |
| Capabilities | Heating, Cooling and Domestic Hot Water |
| Loop Type | Open or Closed Loop |
| Size | 3 to 6 Nominal Tons |
| Configuration | Vertical |
| COPh | 3.5 - 4.7 |
| Certifications | ENERGY STAR, AHRI, TUV |
Features and Available Options
- Domestic hot water desuperheater package.
- Units have coaxial water heat exchangers. Cupro-nickel heat exchangers are available.
- A slow closing water valve kit is available for open loop installations.
- Filter rack can be changed from either side.