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ECO NEWS


Bowman Heralds New Energy Efficient Era For Hot Tub Heating


Bowman heat exchangers are helping a luxury golf and leisure resort save thousands of pounds a year on its energy bills while maximising the potential of its sustainable heating system. The Bowman units are part of a new and innovative heating system for hot tubs, which uses a biomass boiler and heat exchangers instead of conventional electric heating. The system has been installed at the KP Club which is set in 180 acres of the Yorkshire Wolds. The club recently opened 24 new luxury woodland lodges which offer its guests privacy combined with the facilities of a boutique hotel. The lodges each have their own hot tub, supplied by Bristol based, Urban Cedar, which specialises in the design, build and installation of contemporary cedar wood hot tubs. Managing Director Antony Perry, said: “The KP Club is leading the way by


using Bowman heat exchangers linked to a biomass boiler to heat its hot tubs. This is the first time we have come across this method of heating hot tubs in our ten years of operation and offers huge potential to commercial, leisure and domestic users of hot tubs. Bowman heat exchangers, used in conjunction with the Biomass boiler, gives them the opportunity to reduce hot tub heating costs significantly, and use a more energy efficient and sustainable method of heating while improving their ‘green’ credentials with customers.” The energy savings of the


combined biomass boiler/heat exchanger system are nothing short of remarkable. “On average, using conventional electric heaters, each hot tub would use around £500 annually in electricity. However, the heat exchangers use


what is


effectively ‘free’ waste heat from the biomass boiler system – saving the KP Club approximately £12,000 a year,” added Perry.


There is also another major benefit of using heat exchangers. Electric heaters raise the temperature of water in the tubs by 1-2o


C an hour,


C an hour – so the tub reaches target temperature within just two-three hours. This enables the tubs to be heated very quickly, giving the hotel greater flexibility between changeovers and ensuring they are ready for use by new guests immediately.


meaning it can take up to 24 hours to heat a tub from cold. The Bowman heat exchangers raise the water temperature by 12o


The KP Club approached Urban Cedar when the resort was looking at a greener way of heating the hot tubs.


“The KP Club is committed to using more sustainable methods of construction and operation of the lodges. With this in mind, the club had installed a biomass boiler which provides heating and hot water to the lodges and wanted to use the existing heat from the system for the tubs, rather than conventional electric heaters. As a family business, they are able to be very flexible in developing new innovations to suit their clients’ requirements. “Having heard that heat exchangers are a highly efficient solution, the club asked us to contact Bowman first, because of its reputation as the best in the industry. Bowman put us in touch with one of their UK distributors, GVS, who advised us on the best Bowman unit for the application,” said Perry.


GVS recommended Bowman 5113-2S stainless steel heat exchangers for the tubs. Initially, Urban Cedar asked its US


manufacturing facility to test the heat exchanger on


a prototype hot tub. The tubs not only passed the test but produced remarkable improvements in heat-up times and efficiency compared to electric heaters.


www.swimmingpoolnews.co.uk SPN April 2015 29


Back in the UK, the Urban Cedar team fitted the remaining 23 tubs with the Bowman units which was simple to do using standard plumbing components. As the compact heat exchanger is hidden behind the skin of the hot tub, it is not visible and does not affect the design. EJ Bowman is one of the


UK’s largest manufacturers of swimming pool heat exchangers. The 5113-2S stainless unit is part of a range designed for use with conventional boilers, but Bowman also produces heat exchangers for pools heated by solar thermal or heat pumps and the company’s range covers every installation size from small domestic pools and hot tubs, up to Olympic sized pools. Urban Cedar has already received a lot of interest in the heat exchanger hot tubs from other leisure organisations.


The heat exchangers can be used with gas or oil fired boiler systems as well as biomass applications. Urban Cedar is also looking into the potential for the Bowman units to be retrofitted to existing hot tubs. Potentially, domestic hot tubs could also be heated via household central heating systems. “With electricity and fuel costs rising, hot tub owners and operators are already looking for ways to reduce their energy costs through means such as wind turbine and solar power. Heat exchangers used with biomass/conventional boilers could offer a more effective alternative that makes use of resources they already have,” said Perry.


EJ Bowman (Birmingham) Ltd 0121 359 5401 www.ejbowman.co.uk


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