The heat pump most suited to each situation is determined by a number of factors such as; floor area, insulation, building structure and climate. For more information about heat pump sizing please contact Hot Water Heat Pumps. As a general guide to heat pump requirements see models listed below:

11KW UNDERFLOOR HEAT PUMP - 7GU11-1 & 7GUB11-1 (SINGLE PHASE) & 7GU11-3 & 7GUB11-3 (THREE PHASE) Note: Ub Model includes Buffer tank and circulation pump

• Underfloor area of up to 220m² (providing 50 Watts/m²) for Northland, Auckland, and Coastal Bay of Plenty.
• Underfloor area of up to 169m² (providing 65 Watts/m²) for Hamilton, Gisborne, Taranaki, Coastal Hawkes Bay and Wellington.
• Underfloor area of up to 129m² (providing 85 Watts/m²) for the Central Plateau and South Island.

14KW Underfloor HEAT PUMP - 7GU14-1 & 7GUB14-1 (SINGLE PHASE) & 7GU14-3 & 7GUb14-3 (THREE PHASE) Note: Ub Model includes Buffer tank and circulation pump

• Underfloor area of up to 276m² (providing 50 Watts/m²) for Northland, Auckland, and Coastal Bay of Plenty.
• Underfloor area of up to 212m² (providing 65 Watts/m²) for Hamilton, Gisborne, Taranaki, Coastal Hawkes Bay and Wellington.
• Underfloor area of up to 162m² (providing 85 Watts/m²) for the Central Plateau and South Island.

All of Hot Water Heat Pumps' models carry a comprehensive two year parts and labour warranty, including the compressor, evaporator coils, heat exchanger and refrigeration systems. The titanium tube within the heat exchanger is covered against corrosion for 30 years for residential use and 10 years for commercial use.

These heat pump water heaters are fitted with protection systems to prevent damage in the event of a malfunction. Such as a flow switch to ensure the heat pump cannot operate without water flow and other refrigeration safeties. If a problem is identified, the unit automatically shuts down before damage can occur.