A broad choice of inverter models for pond and pool heating
Thermotec Edge is the successor to the Thermotec Pro range, with horizontal air discharge, inverter control and Wi-Fi. Compare the individual capacities and electrical versions below for year-round pond or pool heating, then confirm the winter duty, circulation and available supply.
Read the Thermotec Edge buying guide and model comparison, or browse our complete air source heat pump range.
Choosing a Thermotec Edge heat pump
Compare capacity and electrical phase together
The Edge range includes both single phase and three phase versions at some capacities. Read the full title and supply specification before comparing prices or replacing a heater. The three phase version requires a suitable three phase circuit. An electrician should check circuit protection, cable design and available supply capacity for the exact selected model.
Winter pond heating with Edge
The heating water setting range is 9–40°C and the published operating air range is −15–43°C. These are control and operating limits, not guaranteed pond capacities. For a covered pond held at 12°C through winter, account for the water surface, cover, insulation, local weather and exposed pipework or filtration. Supplier pond-volume guides are a starting point, and should be checked against the conditions of your installation.
Understand the output figures
Edge specifications distinguish normal inverter output at different air temperatures. For example, the 30kW single phase model has a normal range of 4.000–30.00kW at 27°C air and 26°C water, compared with 3.300–24.20kW at 15°C air and 26°C water. Its recommended water flow is 12.4m³/hour. Check normal operation separately from boost figures and compare models at matching test conditions.
Horizontal airflow and water connections
The Edge installation diagram calls for 1,500mm clear in front, 500mm above, 700mm at each side and 300mm behind. Check the diagram against the actual orientation of the unit. Position it so cold exhaust air cannot recirculate into the inlet. Install after the circulation pump and filter as directed in the manual, with a properly arranged bypass and isolation for balancing, servicing and draining.
Compare the models in this range
Open an individual model for its full technical data, current price, installation guidance and delivery information. Electrical phase is shown separately so similarly named versions can be compared correctly.
| Model | Electrical supply | Air discharge |
|---|---|---|
| Thermotec Edge 10.5kW single phase Inverter Pond Heat Pump | Single phase | Horizontal |
| Thermotec Edge 13.8kW single phase Inverter Pond Heat Pump | Single phase | Horizontal |
| Thermotec Edge 17kW single phase Inverter Pond Heat Pump | Single phase | Horizontal |
| Thermotec Edge 20.5kW single phase Inverter Pond Heat Pump | Single phase | Horizontal |
| Thermotec Edge 21.5kW three phase Inverter Pond Heat Pump | Three phase | Horizontal |
| Thermotec Edge 25kW single phase Inverter Pond Heat Pump | Single phase | Horizontal |
| Thermotec Edge 30kW three phase Inverter Pond Heat Pump | Three phase | Horizontal |
| Thermotec Edge 30kW single phase Inverter Pond Heat Pump | Single phase | Horizontal |
Heating output is not electrical consumption
kW can describe either the heat delivered to the water or the electricity used, so check which figure is quoted. In performance tables, A refers to air temperature and W to water temperature, in degrees Celsius. COP compares delivered heat with electrical input at a stated test condition. Compare like-for-like figures rather than using the highest advertised efficiency to predict your annual bill.
Before you order
Measure the water volume and surface area, decide on your target temperature and heating season, and note the cover and insulation. Check the available electrical supply, delivered water flow and outdoor installation space. A suitable cover can reduce the heat that must be replaced. Tell us about exposed filters, pipework and wind so that these are included in the recommendation. During frost, follow the manual’s circulation and drain-down instructions; switching an idle heater off does not remove trapped water.
More help with your heating system
Our pond heating guide explains winter sizing, covers and system choices. Use the air source heat pump filters to compare electrical supply, output, control type and budget across ranges. For circulation equipment, explore our pond pumps and check the delivered flow through the complete circuit.
Other ranges to compare
- Poolex Silverline Top heat pumps
- Poolex Nano FI heat pumps
- Thermotec Nova heat pumps
- Thermotec Apex heat pumps
- Thermotec Neo heat pumps
Different ranges suit different temperatures, seasons and installations. Compare the controller settings and cold-weather output as well as nominal kW before changing to an alternative.
