Electric Heater (Q-Series)The original Jacuzzis invented in 1969 were heated by electricity and nothing changed until relatively recently. The trend in later days has been to fit more powerful heaters to spas and hot tubs in order to reduce the heat up time. Our standard range of hot tubs comes with a 3.0kW heater which depending upon the ambient temperature and the size of the tub will take about half an hour to raise the temperature of the tub by 1°C with the cover in place. While this may seem like a long time, especially in the middle of winter, bear in mind that once you have the tub at operating temperature, that temperature can be maintained quite easily. The insulating qualities of Western Red Cedar combined with the 99 mm thick cover turns your tub into a virtual thermos flask and the daily sanitization cycle provides sufficient heating to maintain the temperature at or close to your desired setting.
Electric heaters operate only when the pump is running, so that the heated water can be taken away from the elements, and this is where the danger lies with using too powerful a heater. Less water flow and more power to the heater can damage the heater elements and they can be very costly to replace. We will provide more powerful heaters, up to 6.0kW, if required but will also recommend a change to the pump for this reason.The electric heater is built into the controller and the temperature is set via an easy to use touch pad. The temperature range available is from 10°C up to 40°C which is set by safety regulations and the recommended setting is 37°C though this is a matter of personal taste. The sanitization cycle is also operated automatically by the controller. All electric heaters must be hard wired into the switchboard on a separate circuit by a licensed electrician and this is a cost which must be taken into consideration when purchasing a hot tub.
Heat Pumps (Modern Range)Heat pumps are an extremely efficient use of electricity. They operate in much the same manner as an air conditioner, taking heat from the surrounding air and using this to heat the water.
Space is an important consideration with the units needing 500mm all around and 1500mm above so they are not suitable for all locations. A 3hp/2.1kW unit is sufficient to heat any hot tub and it can be plugged into a standard 10amp power point.
While the power input is only 2.1kW the heating output ranges from 10.0kW to 14.0kW. Water flow is not a problem with these units as they require only 150 litres per hour to operate.