One of the UK’s biggest chain of gyms and leisure centres has switched to using products from the Rinnai range of commercial air source heat pumps - and electric cylinders - as a major part of hybrid heating and hot water systems at sites up and down the country. The innovative new range of air source heat pumps utilize R290, a LOW scoring GWP (Global Warming Potential) refrigerant. 

Ease of install was cited as a major reason for the switch away from one of the major heat pump brands.

The installation team was quoted as stating that ‘Setting up was straightforward and simplified, this was owing to the easy navigation through parameters that enabled their part of commissioning to be shortened. When commissioning other brands there were numerous parameters and set points, in fact there are layers and layers of them – this means that if one is set incorrectly then it can lead to extensive, expensive time on site in rectifying a small issue’.

He added, as the Rinnai systems are provided complete with heat pump, controls, cylinders, valves and auxiliary heat sources along with schematics and telephone support the installation was hugely streamlined.  

Rinnai’s R290 air source heat pump range is available in 11 different sizes, from 6 kW up to 50 kW. All units arrive with control systems that allows real time programming and customization enabling specific customer requirements to be met. 

R290 allows for several operational benefits: energy efficiency is improved by 10%, hot water temperatures of up to 75 degrees Celsius can be achieved and R290 usage provides compliance alongside the European F-Gas Regulation which focuses on phasing down refrigerant environmental impact.  

To preview this exciting new range visit and receive an information pack for all new Rinnai products visit and leave your details.

As well as providing an extensive list of low carbon technologies Rinnai also offers a range of online customer services that assist in customer choice and information. 

Rinnai’s carbon calculation service considers design from a holistic perspective of capital expenditure, operational expenditure, and carbon savings. Rinnai’s carbon calculation service will compare a customer’s current heating or DHW system to Rinnai’s product portfolio of low carbon, high performance, heating systems that are all proven to reduce cost. This feature will enable customers to view proven benefits when investing in a Rinnai system and understand the practical, technical, and economical benefits achievable from Rinnai system specifications.  

Rinnai low-GWP range of heat pumps demonstrate Rinnai’s continuous dedication to producing low cost, highly efficient and thoroughly robust appliances that reduces operational expenditure and carbon emissions.          

A hybrid (or dual fuel) heating system combines both a high efficiency continuous flow water heater or a hydrogen blend ready 20% water heater with a renewable heating system such as a heat pump or a Solar Thermal arrangement. 

Widespread use of hybrid heating and hot water systems are increasingly relevant to the heating industry as the UK Government aims to reduce national reliance on fossil fuels. A hybrid system can meet all objectives in terms of being practical, economical and technically feasible. 

A hybrid system would be an ideal option for projects looking to replace or upgrade their hot water system with a more energy efficient and cleaner solution. A hybrid system provides designers, property owners and managers with the familiarity of the continuous flow water heating system and renewable energy generated by a heat pump or solar thermal array.  

Rinnai’s Hybrid solution is market leading technology owing to its ability to conserve energy. This is achieved by each gas fired water heater reading the temperature of the preheated hot water and modulating the gas input to boost required water temperature. This means that the renewable gains are maximised and the use of natural gas or hydrogen in the future is optimised. For more insights on Hybrid systems visit

Consultants, specifiers and contractors should seek manufacturers and suppliers with systems technology that is equipped with smart controls and adjusts performance on a constant basis in the drive to lowering carbon outputs yet retaining the need to create a healthier way of living.