Rinnai UK is continuing to be open for business throughout the current situation with staff able to take any orders or enquiries via telephone or online.

We believe it is both critical and a duty to do our part in helping stop the transmission of COVID-19.  Therefore, we have staff who can and are working from home. And business is continuing as usual via phone and online. 

The company supplies a range of continuous flow hot water heating units and systems for installation in commercial and domestic sites.

Rinnai has very good stock levels of all units in the range plus spares and accessories.

Please contact our company direct if you are having any problems in gaining access to the supply of units – 

Call:   Head Office 01928 531 870 or Rinnai London 0203 903 9030


Rinnai’s continuous flow gas fired water heating units have been installed at the award winning Hillcroft Park which is set in the beautiful Ullswater Valley and offers year-round holiday accommodation to suit every taste and pocket. Hillcroft Park sits at the head of Ullswater above the pretty lakeside village of Pooley Bridge and offers traditional camping, camping pods, luxury lodges and holiday homes.

Recently the site, owned operated by the Heath family, added a new visitor pavilion and shower block to add to the existing facilities. Five Rinnai 1200i continuous flow units were installed as a cascade design so that any peak demand can be easily met – the 1200i delivers up to 35 litres of useable hot water per minute. The whole system is powered by LPG. All Rinnai units used in sites which are ‘off grid’ of the mains gas supply are supplied to site LPG ready enabled.

The hot water delivery system at Hillcroft Park incorporates a secondary return utilising Rinnai pure controls and common flue headers on the units to streamline the flue configuration. The site is based on sustainability and energy savings so electronic sequencing is employed on the system. These smart sequencing controls will optimise system performance by only firing additional units when more outlets are opened meaning the site only uses energy when it is needed.

Hillcroft Park has won many awards – notably the David Bellamy Conservation Award – several years running. This honour is awarded to those sites which met and exceed a variety of criteria – Managing their land as a haven for wildlife; Reduce their use of energy, water and other resources; Reduce, reuse and recycle the waste they produce and support their local communities.

The site is also no strange to celebrities – earlier this year the much-loved comedian, Johnny Vegas returned to Hillcroft Park to open the impressive, new facilities block.   Hillcroft Park became Johnny’s Lakeland ‘Home from Home’ for six weeks in 2017 during filming for the BBC series ‘Home from Home’ which appeared on BBC1.

Johnny opened the brand-new facilities building including a shower block that must be one of the most impressive in the UK when it comes to camping bathing facilities. Many of the fixtures and fittings would not be amiss in a luxury bathroom. Not content with high quality showers, basins, taps and tiles – campers also enjoy panoramic Lakeland scenes thoughtfully installed within the facilities themselves as well as a custom-made Lakeland soundscape of dawn chorus, sheep and, of course, water.

At Hillcroft Park, life takes on a slower pace – a throwback to those carefree, childhood holidays. While you can connect to the world wide web while you’re with us, we’d encourage you to ditch the digital, disconnect and discover simpler pleasures like a walk up the fell, a dip in the lake followed by a family feast or a quiet pint and a breath-taking sunset to the sound of birdsong.

The Rinnai HDC 1200i water heater unit uses heat exchanger technology to allow high capacity from mains pressure, thereby guaranteeing all the hot water needed, when it is needed on demand. As well as high capacities, the Rinnai unit has lower greenhouse emissions because of the new reduced NOx burner technology.

Available in both internal and external versions, HDC1200i gives end users 7% net efficiency* because the condensing process delivers up to 97% thermal efficiency, translating to significant energy savings when compared to standard tankless water heaters.

All of which makes the HDC1200i continuous flow hot water system by far the best option for all types of sites.

“The only time you are using energy is when there is a demand, in other words it is only burning gas when a tap or shower is being run and, design improvements by Rinnai have increased heat efficiency of its hot-water appliances from 80% to 95%, while decreasing gas consumption by around 14%,” says Gerard Gulliver for Rinnai.

The HDC1200i is also renewables-ready (suitable for use as a temperature booster for solar thermal and heat-pump) and can be easily configured in a manifold arrangement, ensuring they will never run out of hot water whatever the demand. As long as electricity, water, and gas supplies are connected, hot water is available when the hot water taps are open.

A DIP switch enables pin-point temperature setting and for safety, the over-temperature protection will switch off the heater should the water temperature exceed by 3°C above its set-point.

In real terms, swapping from a hot water storage system to a continuous flow hot water system can save a site several kW a day which equates to a lot of money a year at current prices.

* Tested and certificated by Technigas to EN 26.

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Rinnai’s Infinity Plus Cascade is a major move into bigger sites and applications which have a high demand for hot water and energy efficiency, the design parameters of the cascade systems mean that upgrading the traditional water heater to a technologically advanced continuous flow system is simple.

Rinnai, leading innovators in the manufacture of continuous flow water heaters, can now offer commercial hot water provision which is virtually limitless in this custom-made solution with a choice of either two unit or three unit modules of its award-winning condensing continuous flow water heaters.

Infinity Plus Cascade has been developed by Rinnai to guarantee high volumes of temperature accurate hot water. The design parameters of the cascade systems offer ease of integration into new and existing buildings even when retrofitting from traditional storage systems. The modules incorporate Rinnai’s proven energy-saving 1500 or 1200 condensing continuous flow water heaters with its newly developed common header flue system technology.

Infinity Plus Cascade is designed to deliver high efficiencies for the building operator whilst also streamlining the installation in one “turnkey package.” As any number of modules can be manifolded together, it is an ideal solution for large sites and for those applications – where there is a heavy demand for constant hot water.

Installers will find fitting the modules easy and straightforward as Infinity Plus Cascade comes with its own made to measure rack making installation simple and quick, and with no need for excessive rejigging of pipework. The compact footprint of Infinity Plus Cascade means it can be housed in a small space and still be easily accessible for maintenance and servicing.

Not only does the choice of Infinity Plus Cascade give highly significant cost savings over other forms of water heaters, but there also the added remedial work savings, for instance there is no need to knock through walls to cater for the movement of large cumbersome water heating equipment, valuable internal space can be created or saved.

Hot water downtime is also virtually eliminated as the modular nature of the system means that when service and maintenance is performed, elements of the system are still operational saving on service interruptions.

For more information on the RINNAI product range visit

Rinnai, designer and manufacturer of the Infinity range of continuous flow gas fired water heaters, welcomes the implementation of the Energy Labelling Directive on 26 September as it scores ‘A’ ratings on all its water heaters.

“Energy labelling of product offers transparency to specifiers and end users who will now have a clear guide for choosing the most efficient units available,” said Chris Goggin, Associate Director of Rinnai UK.

“Rinnai brings to market the most extensive range of ‘A’ rated appliances with load profiles ranging from small domestic models to XXL sized industrial units,” said Goggin.

“The ‘A’ rating applies to when a unit is in use – i.e. when fuel is being used, and as an ‘A’ rated Rinnai unit only uses fuel when water is being drawn the energy label crystallises our reputation for efficiency, as continuous flow water heaters suffer no standing losses with storage counterparts”.

When Rinnai water heaters are paired with solar thermal and the latest intelligent controls are used for ultimate heat recovery, even higher efficiencies can be achieved, he added.

Rinnai is also set up to offer installers expert help with system labelling. Installers will be responsible for creating the labels for those installations that combine a water heater with renewables, for example.

On 26 September 2015 The Energy Related Products (ERP) Directive, incorporating Ecodesign and Energy Labelling Directives for water heaters (Lot 2) come into force, meaning that water-heating products sold in the UK will need to meet minimum energy performance criteria in order to be legally placed on the market, and will require an energy label.

For more information on the RINNAI product range visit