boilder – Building Specifier

Holmwood House was opened in 1922 as a boy’s school by Mr and Mrs E F Duggan with the aim ‘to develop the individuality and abilities of each child, to make them self-reliant and adaptable’. The world has changed a great deal in the school’s first century, but it still upholds those underlying values.

Except for wartime evacuation, the school has remained on the same site, two miles from the centre of Colchester. In 1985 Holmwood House began accepting girls, and in 2006 the nursery was opened in Great Horkesley. The site needed to upgrade and update its hot water delivery system. The new hot water delivery system – comprising of 3 x Rinnai N Series 1600i units – was installed by SDF Mechanical.

Shaun Fuller, who started SDF in January 2018 has been working within the HVAC industry since he was 17 years old and has gained a wide range of experience over the last 13+ years. From working on domestic boilers within households to large industrial steam boilers in factories, he has a wide range of skills to meet all requirements throughout all sectors. Since starting the business Shaun has progressed SDF Mechanical Services into having a large customer base in all sectors in the industry and built close relationships with them. SDF Mechanical Services are Gas Safe and Oftec Registered and have a wide range of qualifications to be able to carry out various different types of work to the highest of standards.

For Rinnai Harry Barton commented,

“The diminutive size, lightweight nature (less than 30kg) and high performance of 960 litres per hour at a 50 degree rise ensured that the Rinnai solution was an ideal system for this project. Having run some capital expenditure, operational expenditure, and carbon modelling, we also saved the school money and reduced its carbon footprint. “

Rinnai’s hot water heating units have been certified by the British Standards Institution (BSI) for use as hydrogen blends ready. The range was subjected to rigorous testing and analysis by the BSI and the product range is ‘Hydrogen BLEND 20% ready’ with the I2HY20 gas category certificate for all its products.

All Rinnai continuous flow condensing water heaters are guaranteed to provide limitless volumes of temperature accurate hot water (in excess of 1500 litres per hour) this is combined with market leading turn down ratios (13-1) and 96% efficiency.

Extensive testing also demonstrates that multiples of its existing ranges are retrospectively compatible with future hydrogen blending including all N series models already installed in the UK.

The Rinnai Sensei N Series continuous flow hot water heater range offers a more compact, enhanced combustion design that allows for easier installation, superior operational performance as well as ease of serviceability.

The Rinnai Sensei N Series is the first ever continuous flow hot water heating unit manufactured with stainless steel heat exchangers to be available in the UK – this gives a greatly extended working life at optimum performance to each of the four models in the range. Added to this are the market leading extended warranties, that accompany the hydrogen Blend-ready and Bio-LPG ready instantaneous water heaters.

The four models are:

-the N1600i giving 954 litres per hour (at 50 degrees)

-the N1600e (external) also giving 954 litres per hour (at 50 degrees)

-the N1300i giving 775 litres per hour

-the N1300e also giving 775 litres per hours of temperature controlled hot water at 50 degrees.

The two 1600s have load profiles of XXL and are water efficiency class A rated, while the 1300s are load profile XL and are also water efficiency class A rated.

All the range is also low-NOx (Less than 26ppm meaning they gain additional points under BREEAM) and the futureproofed continuous flow water heater utilises Rinnai’s patented advanced burner technology with a 13-1 turn down ratio – the largest on the market combined with 96% efficiency rating. Integral controls on the units enable the water heater to achieve high efficiencies because of advanced burner control and high modulation ranges.

This wide range of modulation means that energy usage is completely optimised as the water heater through smart inbuilt controls will only heat the water to the temperature required thus preserving energy.

RINNAI’S H3 DECARBONISATION OFFERS PATHWAYS & CUSTOMER COST REDUCTIONS FOR COMMERCIAL, DOMESTIC AND OFF-GRID HEATING & HOT WATER DELIVERY

www.rinnai-uk.co.uk/about us/H3

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 UKCA 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.

Creating a Healthier Way of Living

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Chris Goggin of Rinnai looks at a new report from the National Audit Office on the 2035 target for decarbonisation

A new report from the National Audit Office, an independent parliamentary body responsible for auditing governmental expenditure, has warned that lack of a clear future plan to decarbonise gas usage could result in a lack of investment in future clean energy projects and therefore impose an increase on energy costs for all UK customers.

The report was quoted in national media as saying that: “the absence of a clear plan and the perception that there could be changes in government policies could deter external investors from providing funds for new infrastructure or lead them to increase the rates of return they require, ultimately increasing costs for energy consumers”.

A key component of the UK’s decarbonisation strategy is to generate all electricity by carbon reducing sources by 2035. However, 40% of all electricity is still produced via gas. 2035 is projected to experience a 60% increase in electrical demand as fossil fuels are planned to be replaced with widespread electrification and other clean gas alternatives.

Further reported in the national media was Gareth Davies, head of the NAO, who said:

“It is understandable that [the government] has focused on dealing with the immediate energy crisis over the past 12 months. But one consequence of this is that it lacks a delivery plan for decarbonising power by 2035, which is the backbone of its broader net zero ambition.”

He added that the longer it took for a plan to be drawn up, “the higher the risk that it does not achieve its ambitions, or it does so at a greater than necessary cost to taxpayers and consumers.”

It has been estimated that between £280 and £400 billion of investment is required to decarbonise the power sector, not including the research of new technologies and the construction of new networks.

A clear and centralized plan that is understood and endorsed by energy distributers and customers alike can accelerate progress, attract investment and safeguard future customer costs. Presently, the UK is not as an attractive investment opportunity as America.

To enhance the international investment profile of UK clean energy projects, an equivalent to the US Inflation Reduction Act should be designed and introduced soon. The Inflation Reduction Act means that clean energy projects will be rewarded with tax credits that can amount to 30% – 70% of the total capital costs of a project. The NAO has expressed concern regarding the lack of work in attracting future investors in UK future clean electricity production. Without widespread domestic and international investment UK aims of producing 100% clean electricity by 2035 are lessened.

Meg Hillier MP, chair of the public accounts committee, was quoted in The Guardian as saying:

“The Department for Energy Security and Net Zero [DESNZ] does not have a delivery plan for decarbonising electricity. While DESNZ has understandably been focusing on its immediate response to the energy crisis, I’m disappointed by its slow progress and lack of focus on the long-term. Without a delivery plan, it is unclear whether DESNZ’s targets are achievable.”

A DESNZ spokesperson was quoted in the same article as saying:

“Since the energy crisis caused by the war in the Ukraine our focus has been on delivering essential cost of living support, including paying half a typical household’s energy bills this winter, because this is the primary focus for families across the country.

“At the same time, the UK is decarbonising faster than any other G7 country … Our targets are ambitious; however we haven’t taken our foot off the pedal and our commitment to decarbonise the UK’s electricity system by 2035 remains resolute.”

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