Indoor Pool Heating and Ventilation Design for Streamline Swim Academy

Streamline Swim Academy is an indoor pool facility in New Plymouth conceived by Brad and Amy Fale. They recognised a community need for swimming lessons that was not being met and found that their own children needed a greater challenge as they became more advanced swimmers. These experienced business owners had their customers’ needs as a priority. They also wanted to ensure that the building was practical and energy-efficient.

HWHP (Hot Water Heat Pumps Ltd) were asked to participate in the project after recommendations from Pool Builder Aaron Hinton along with research and comparisons of alternative options by Architect William Giesen. HWHP’s participation involved the design, construction and installation of a complete indoor pool heating and ventilation system that included heating the main pool and the toddler pool, air heating and air distribution for the pool hall to control condensation, underfloor heating and heated air for the changing rooms and hot water for the showers and amenities.

There were three important modifications to the preliminary plans that HWHP pushed for to improve the function and longevity of the building:

Ensuring adequate insulation of the roof and external wall structure to minimise unnecessary heat loss from the pool enclosure during the colder months, and therefore reducing the energy input required for heat.
Underfloor heating in the changing rooms to provide a comfortable environment for customers and to promote evaporation of water from the floor surface which in turn increases health and safety. Where possible, HWHP recommends all indoor pool facilities implement underfloor heating in the changing rooms to help control the indoor environment. Clients who have installed underfloor heating, despite any initial apprehension, are grateful that they did because the feedback and patronage they receive justifies it.
The mechanical room for housing the pool filtration system, heat pump and Vent-Air equipment was too small. Thankfully, HWHP and Bonnifait + Giesen were quickly able to work together to overcome this difficulty. The mechanical room was enlarged and four smaller Duoheat heat pumps and Vent-Air air handlers were used rather than one or two large units. The use of four heat pumps also allowed for greater control over part load and full load heating requirements.

The installation and commissioning of the equipment at Streamline Swim Academy was completed in late 2017. An update with the owners revealed that the facility has been a great success. The pool environment is good, there is no condensation at all and the underfloor heating in the changing room really helps. Amy said she has appreciated the communication and speed of support.

Vent Air System

Hot Water Heat Pumps

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Vent-Air indoor pool ventilation and heat recovery systems are the ideal solution for indoor swimming pools, keeping condensation and moisture under control at all times.

NZ-Owned Business

The Vent-Air system heats fresh air coming in to the enclosure. The warm air expands and reduces the moisture content in the enclosure. Each Vent-Air indoor pool ventilation system is custom designed to provide the right amount of fresh, heated air to effectively control the indoor pool moisture. It does this at a fraction of energy consumption in comparison with other products available.

Each Vent-Air System features Air Handling Units that supply fresh heated air into the enclosure using either infloor ventilation or overhead ducts to evenly distribute the freshly heated air. The same amount of stale humid indoor air is exhausted at the same time by the Return Fan Coil Air Handling Units. This minimises condensation, controls the humidity level, reduces odours and creates a pleasant environment for pool users by continuously replacing stale and humid indoor air with fresh heated outdoor air.

Duoheat Underfloor & Domestic Hot Water Heat Pump: Floor 310m² to 474m²

Hot Water Heat Pumps

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The Duoheat range of dual-purpose heat pump water heaters eliminates the need to invest in two separate heat pumps.

NZ-Owned Business

The heat pump most suited to each situation is determined by a number of factors. When combining the heating for a underfloor heating and domestic hot water, sizing priority is given to the underfloor as it has the greatest load requirement. These factors include; 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:

Underfloor area of up to 310m² (providing 50 Watts/m²) for Northland, Auckland, and Coastal Bay of Plenty.
Underfloor area of up to 238m² (providing 65 Watts/m²) for Hamilton, Gisborne, Taranaki, Coastal Hawkes Bay and Wellington.
Underfloor area of up to 182m² (providing 85 Watts/m²) for the Central Plateau and South Island.

Underfloor area of up to 358m² (providing 50 Watts/m²) for Northland, Auckland, and Coastal Bay of Plenty.
Underfloor area of up to 275m² (providing 65 Watts/m²) for Hamilton, Gisborne, Taranaki, Coastal Hawkes Bay and Wellington.
Underfloor area of up to 211m² (providing 85 Watts/m²) for the Central Plateau and South Island.

Underfloor area of up to 474m² (providing 50 Watts/m²) for Northland, Auckland, and Coastal Bay of Plenty.
Underfloor area of up to 365m² (providing 65 Watts/m²) for Hamilton, Gisborne, Taranaki, Coastal Hawkes Bay and Wellington.
Underfloor area of up to 279m² (providing 85 Watts/m²) for the Central Plateau and South Island.

Underfloor and domestic hot water

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.

Duoheat Pool & Domestic Hot Water Heat Pump: Pool up to 150m²

Hot Water Heat Pumps

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The Duoheat range of dual-purpose heat pump water heaters eliminates the need to invest in two separate heat pumps.

NZ-Owned Business

The heat pump most suited to each situation is determined by a number of factors. When combining the heating for a swimming pool and domestic hot water, sizing priority is given to the pool as it 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, 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 as listed:

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.

Residential Pool (up to 4 hours per day uncovered) with a surface area up to 110m² for most of the North Island, up to 95m² for the Central North Island and South Island.
School Pool (up to 6 hours per day uncovered) with a surface area up to 80m² for most of the North Island, up to 71m² for the Central North Island and South Island.
Commercial Pool (up to 12 hours per day uncovered) with a surface area of up to 68m² for most of the North Island, up to 58m² for the Central North Island and South Island.

Residential Pool (up to 4 hours per day uncovered) with a surface area up to 105m² for most of the North Island, up to 50m² for the Central North Island and South Island.
School Pool (up to 6 hours per day uncovered) with a surface area up to 85m² for most of the North Island, up to 75m² for the Central North Island and South Island.
Commercial Pool (up to 12 hours per day uncovered) with a surface area of up to 74m² for most of the North Island, up to 63m² for the Central North Island and South Island.

Residential Pool (up to 4 hours per day uncovered) with a surface area up to 150m² for most of the North Island, up to 125m² for the Central North Island and South Island.
School Pool (up to 6 hours per day uncovered) with a surface area up to 113m² for most of the North Island, up to 102m² for the Central North Island and South Island.
Commercial Pool (up to 12 hours per day uncovered) with a surface area of up to 91m² for most of the North Island, up to 75m² for the Central North Island and South Island.

Swimming or spa pool.
Swimming pool and domestic hot water.

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.

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