Rinnai has unveiled a CIBSE-approved CPD on Seasonal Performance Factors, on the efficacy of Heat Pumps, to a focus group of consultants, systems designers and contractors in London. The CPD started as a ‘White Paper’ presenting an innovation in measuring system performance and providing increased detail into the efficiency of commercial heating and hot water dispersal systems. Rinnai’s Sean Ehlen M Eng was the author of the SPF White Paper, and it is freely available to view HERE


Rinna’s focus group was well attended and concentrated on introducing an alternative methodology – Seasonal Performance Factor – to evaluate the efficiency of commercial heating and hot water systems. Rinnai’s Sean Ehlen M Eng hosted the presentation explaining his new approach and then took questions. The peer-led focus group arrived at the conclusion that the Seasonal Performance Factor approach provided customers with greater added transparency towards system performance, cost and expectations.

Rinnai’s ‘White Paper’ report details the potential limitations of manufacturer-issued efficiency measures for Heat pumps, namely COP (Coefficient of performance) and SCOP (Seasonal Coefficient of Performance). Manufacturers often measure heat pump efficiency using Coefficient of Performance (COP), which is the ratio of useful heat energy produced to the electricity consumed at a specific external air temperature and temperature rise required.

Due to the SCOP rating solely measuring the efficiency of the heat pump unit, this may yield a lack of system congruity when considering the entire system. Consequently, relying on this performance measurement alone can affect the overall system expectations and ultimately the expected carbon reductions.

Instead, the Rinnai White paper has adopted the ‘Seasonal Performance Factor.’ This methodology evaluates all energy utilizing components within a commercial hot water system, therefore, measuring the performance of the entire system as opposed to solely the heat pump.

By presenting this White Paper to UK customers, Rinnai aims to provide information that delivers a concise and true account of commercial hot water heating performance using the ‘Seasonal Performance Factor’ methodology.

Rinnai continues to inform the UK market of details that provide an accurate statement of system performance, while considering the effects on operational expenditure, economic investment, and environmental impact.

Rinnai understands the significance of an investment during a time of sensitive economic constraints and rising energy costs. Rinnai aim to share all information that assists the UK customer in decision making that assists the drive to NetZero and is financially efficient.





CLICK HERE For more information on the RINNAI product range




Rinnai’s H3 range of decarbonising products include hydrogen / BioLPG ready technology, hybrid systems, and a wide range of LOW GWP heat pumps and solar thermal. Also, within Rinnai’s H3 range is Infinity hydrogen blend ready and BioLPG ready continuous flow water heaters which are stacked with a multitude of features that ensure long life, robust & durable use, customer satisfaction and product efficiency.

Rinnai’s range of decarbonising products – H1/H2/H3 – consists of heat pump, solar, hydrogen in any configuration, hybrid formats for either residential or commercial applications. Rinnai’s H3 range of products offer contractors, consultants and end users a range of efficient, robust and affordable decarbonising appliances which create practical, economic and technically feasible solutions. The range covers all forms of fuels and appliances currently available – electric, gas, hydrogen, BioLPG, rDME solar thermal, low GWP heat pumps and electric water heaters.

Rinnai H1 continuous water heaters and boilers offer practical and economic decarbonization delivered through technological innovation in hydrogen and renewable liquid gas ready technology.

Rinnai’s H1 option is centred on hydrogen, as it is anticipated that clean hydrogen fuels will become internationally energy market-relevant in the future; Rinnai water heaters are hydrogen 20% blends ready and include the world’s first 100% hydrogen-ready hot water heating technology.

Rinnai H2 – Decarbonization simplified with renewable gas-ready units, Solar Thermal and Heat Pump Hybrids. Rinnai H2 is designed to introduce a practical and low-cost option which may suit specific sites and enable multiple decarbonisation pathways with the addition of high performance.

Rinnai H3 – Low-GWP heat pump technology made easy – Rinnai heat pumps are available for domestic and commercial usage with an extensive range of 4 – 115kW appliances.

Rinnai’s H3 heat pumps utilise R32 refrigerant and have favourable COP and SCOP.

Rinnai is a world leading manufacturer of hot water heaters and produces over two million units a year, operating on each of the five continents. The brand has gained an established reputation for producing products that offer high performance, cost efficiency and extended working lives.

Rinnai’s commercial and domestic continuous flow water heaters offer a limitless supply of instantaneous temperature controlled hot water and all units are designed to align with present and future energy sources. Rinnai condensing water heaters accept either existing fuel or hydrogen gas blends. Rinnai units are also suited for off-grid customers who require LPG and BioLPG or rDME.

Rinnai products are i2HY20 certified, A-rated water efficiency, accessed through multiple fuel options and are available for purchase 24/7, 365 days a year. Any unit can be delivered to any UK site within 24 hours. Rinnai offer carbon and cost comparison services that will calculate financial and carbon savings made when investing in a Rinnai system. Rinnai also provide a system design service that will suggest an appropriate system for the property in question. Rinnai offer comprehensive training courses and technical support in all aspects of the water heating industry including detailed CPD’s. More information can be found on Rinnai’s website and its “Help Me Choose” webpage.



A new study from price comparison website MoneySuperMarket visualises the way people across the world affect the environment

  • Britain has a greener population than France, Germany and the United States – but is only 16th in Europe for green living and 53rd worldwide
  • Air pollution in the UK is more than double that of the US – and linked to 40,000 early deaths a year

A new study from MoneySuperMarket today reveals how people impact their environment, both in the UK and throughout the world. The new research highlights the individual contribution to the world’s climate – as well as highlighting areas for improvement for each country.

Britain managed to rank 53rd overall for individual impact on the world*, boasting a greener population than France, Germany and the United States. Overall, the UK is only 14% worse on an average score than Mozambique, the top-scoring country for environmental awareness, and 51% better than Trinidad & Tobago, the worst.

But the country shows up poorly when it comes to energy usage – only 22 per cent of UK energy is green, so even low usage has a higher impact in the world compared to Bhutan or Albania, where energy is nearly 100% green.

The French perform even worse, with green power at a low-ranking 17 per cent of their total usage. They also throw away seven per cent more waste than the UK every day.

And while Ireland is near the bottom of the rankings (99th overall) due to high waste and mid-level wastewater treatment, our air pollution is more than double. The United States, too, rank lower than Britain at 101st, but their air pollution is only 2.9µg/m3, compared to our 7.6µg/m3. This air pollution is linked to over 40,000 early deaths in the UK a year**.

Britain Among the Worst in Europe for CO2

Despite somewhat positive overall standing for per-person CO2 emissions, the UK’s results are poor compared with much of Europe, with 71% of other continental countries producing less of the greenhouse gas per capita.

9% of the UK’s CO2 emissions emanate from the capital each year, with industrial contributions only 22% higher than domestic.

Landfill Concerns

Previous UK policies have attempted to reduce the size of landfill, with limited success. Only 25% of municipal waste in the UK is recycled, with 49% being sent directly to landfill.

The average British citizen throws away 1.79kg of municipal solid waste a day – a higher amount than 50% of other European countries, including Sweden and the Czech Republic, and higher than anywhere in South America or Asia, with the exclusion of Sri Lanka.

As well as being an eyesore and damaging to the immediate local environment, landfills produce copious quantities of methane, a greenhouse gas with 21 times the effect on global warming of CO2.

“We wanted to know what our personal input to the environment was,” said Stephen Murray, Energy Expert at, “Everyone wants to get their carbon footprint down, but now we can see exactly how the UK compares to the rest of the world – it really puts it in perspective.”

Using the interactive map you can view the breakdown of the different measurements that make up the average individual human impact in each country, including energy consumption, air pollution and reliance on non-renewable energy, see the MoneySuperMarket human impact interactive map here.