The Duoheat range of dual-purpose heat pump water heaters eliminates the need to invest in two separate heat pumps. They are ideal for heating users' pools and underfloors, reducing unit redundancies and minimising the overall footprint of their equipment.
These units are ideal for swimming pools with a surface area up to 95m² in the Coastal North Island and an underfloor area of up to 276m2 in Northland, Auckland and Coastal Bay of Plenty (see “Scope” for further details). Typically, for every 1kW of electric input, users receive 5kW worth of heat.
Consistent performance from -10°C to 45°C
Engineered and built in New Zealand from local and imported parts
Underfloor onboard buffer tank and circulation pump (with Ub models only)
Duoheat heat pump water heaters offer the same advantages of Performance Plus heat pump water heaters with the addition of:
Eliminating the need for investing in two or three separate heat pump water heaters
The heat pump most suited to each situation is determined by a number of factors. When combining the heating for a swimming and underfloor, sizing priority is given to the area has the greatest load requirement. These factors include things such as; surface area of the pool, whether the pool has a cover and the time it is covered, underfloor area, building structure and local temperature and weather conditions.
For more information about heat pump sizing please contact Hot Water Heat Pumps. As a general guide to heat pump requirements for an extended season of swimming from mid October to mid April and underfloor area based on modern insulated houses with a 2.4m stud as listed:
NOTE: Ub model includes buffer tank & circulation pump
Residential Pool (up to 4 hours per day uncovered) with a surface area up to 65m2 for most of the North Island, up to 60m2 for the Central North Island and South Island.
School Pool (up to 6 hours per day uncovered) with a surface area up to 48m2 for most of the North Island, up to 43m2 for the Central North Island and South Island.
Commercial Pool (up to 12 hours per day uncovered) with a surface area of up to 38m2 for most of the North Island, up to 22m2 for the Central North Island and South Island.
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 Wellingon.
Underfloor area of up to 162m2 (providing 85 Watts/m2) for the Central Plateau and South Island.
Swimming pool and underfloor
Indoor pool heating and air heating
Other Performance Attributes
All heat pump 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.
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.