The next generation FUSION range from hot water specialists Adveco is a complete range of packaged electric and packaged renewable electric water heaters for commercial projects. FUSION is a modern, future-proof system that embraces electric water heating and the option to incorporate air source heat pumps (ASHP) to lower carbon emissions in line with government calls for net zero.

As an all-electric system, it uses familiar technology that is relatively simple and quick to install, cost-effective and reduces carbon emissions. With an increased heating capacity over first generation Adveco FUSION systems of up to 34 kW, the next generation of FUSION systems offers greater versatility for meeting domestic hot water (DHW) demands across a range of commercial properties. Projects with small to medium basin and sink-led hot water demands – such as cafes, restaurants offices or gyms – taller buildings with basement plant rooms and organisations that depend on 24/7 hot water provision for continuity of service all gain advantages from using FUSION.

The packaged format enables flexibility to specify from a range of cylinders, primary electrical heating, air source heat pumps for pre-heat, and immersions for back-up all supported by Adveco’s bespoke controls to ensure optimal, efficient operation.

FUSION cylinders (ATSI & ATST) come with dedicated mounting points for the ARDENT electric boiler, simplifying and reducing the chance of installation errors. By mounting the electric boiler directly to the cylinder FUSION is a more compact, space-saving option when specifying or having to refurbish an existing plant room. The cylinder connections and clean-out plate are all arranged on the front of the tank for easy access when connecting pre-built pipework with a choice of left- or right-hand side connection, and for regular maintenance. This arrangement also enables FUSION to be situated tightly into a corner, again maximising available space.

The use of the 9, 12 or 24 kW ARDENT electric boiler replaces the use of a single immersion for primary heating. ARDENT, with multiple immersions inside its sealed storage tank provides automatically balanced usage to prolong system life. The typical cause of immersion failure is the creation of limescale in hard water areas, production of which is accelerated by the higher heat intensity of electrical water heating. This is avoided in FUSION, as the ARDENT is used in a sealed ‘primary’ loop to an indirect coil in the system’s cylinder. The ARDENT electric boiler heats the same water continuously so there is only a small, finite amount of scale in the system which will not damage the elements, effectively eliminating damage to the immersions by limescale.
FUSION cylinders offer single (ATSI) and twin-coil (ATST) variants with capacities ranging from 200 to 500 litres.

Single coil cylinders (ASTI) are used for standard electric indirect water heating with an ARDENT electric boiler (FUSION-E), and the option of an immersion for resistive heating ‘directly’ to water in the cylinder (FUSION-Eplus). Dual-coil cylinders (ATST) enable the addition of a 6 or 10 kW FPi32 monobloc air to water heat pump. The ASHP is connected to the lower coil and supplies indirect pre-heat to the vessel, while ARDENT is connected to the upper coil to provide primary indirect heating (FUSION-T & FUSION-Tplus).

FUSION E systems come with a thermostat and overheat thermostat as standard, but for renewable variants featuring dual-coil ATST cylinders and ASHP, optimisation within the FUSION system comes from Adveco’s purpose-built FUSION Control Box. This smartly balances the two heat sources enabling the water in the cylinder to be heated in the most efficient way. The heat pump’s contribution is maximised, achieving a working pre-heat flow temperature of 50°C under UK weather conditions, even if the ambient air temperature drops as low as -25°C.
With the cylinder water pre-heated by the ASHP, the ARDENT boiler is not required to work as hard to raise flow temperatures to the 65°C demanded by commercial applications. Electrical demand on the boiler is reduced by as much as 30%, delivering operational savings and reducing carbon emissions by up to 71%. This variant is perfect for organisations seeking to invest in a water heating application as part of a decarbonisation strategy without losing sight of higher operational costs associated with all-electric systems compared to equivalent gas-fired water heating.

Where hot water demands become a business-critical service, such as in restaurants or GP’s surgeries, FUSION will also support the addition of an Adveco backup immersion providing additional resilience ensuring there is no single point of failure for assured service provision. When only used as an emergency heating source, or during periods of unplanned excess demand, the inclusion of an electric immersion can be extremely advantageous. For FUSION systems incorporating the additional backup immersion (FUSION-Eplus & FUSION-Tplus) controls are further extended to incorporate SMS output to advise building managers of a fault scenario and automated engagement of the immersion back-up to guarantee business-critical hot water supply.

For commercial organisations specifying a hot water system for new buildings faced with regulatory changes on new gas connections, or planning to move from existing gas-fired systems to electrical alternatives FUSION provides an impressive range of choice whether cost, sustainability or business security are the driving factors for specification.


Water conservation is the key to reducing energy bills.  Heating water accounts for nearly 1/5th of energy use in UK homes.

Reducing hot water demand is an effective way to help occupants conserve energy and reduce bills.  Some uses are fixed, e.g. the washing machine or dishwasher, here education about full loads and eco settings can have an impact.  However, many are not.   Showers account for a quarter of UK domestic water usage.  To reduce this hot water usage there are three options:

Cold showers, not ideal on a cold winter morning
Shorter showers, using egg timers or a ‘favourite song’ to cut shower time

Flow reduction, less water is used while the shower is running.
The first two options require active engagement by all members of the household.  The last is a fit and forget method of permanently reducing water use.

‘Eco’ or water saving shower heads are designed to restrict the water flow to a single outlet.  They are highly effective but retrofits like these come at a price, especially larger properties with multiple bathrooms.  They also do nothing for running taps, whether they’re in the bathroom or kitchen.

A second 1/5th of water usage is the taps in the house, e.g. rinsing the coffee cup, or washing hands.  Again, flow restrictors can be fitted to each of these outlets.   For households on an increasingly tight budget, or developers trying to minimise costs, multiple fittings for each tap or shower might not be an investment they are able to make.

Household flow restriction for just £20 per property

The alternative is whole site flow reduction.  Fitting a device such as Groundbreaker’s NRv2 LoFlo, at the meter regulates the level of flow entering customer premises – regardless of network pressure.  As the flow of water into the premises is limited, then the amount used in ‘time controlled’ activities is also limited – but without providing a degradation of service.  More importantly not requiring any intervention or behavioural change on the part of the customer, so leading to ‘natural’ reduction in consumption.   Our water companies are regulated to provide a minimum level of water supply, but in many areas, due to network structure and gravity fed systems, supply is much greater. Households in high pressure areas could be receiving up to three times the required minimum levels.  So, run a hose for five minutes at the bottom of the hill, and your lawn will be greener that the gardener that does the same at the top.  ‘Time controlled’ uses could be reduced if all households received the same acceptable, ‘standardised’ supply.   Independent research carried out by WRc, showed a theoretical reduction of 2-4% of typical water usage when devices such as LoFlo are installed. However, recent field trials by a major UK water company have showing savings of 5%.   As part of UK Net Zero Carbon targets water companies have been targeted to reduce the water householders are using, Per Capita Consumption (PCC).  PCC reduction targets average just under 6% in the UK, so utilising property flow restriction could achieve just 1% off the average PPC reduction targets!  However, water companies are also tied to customer performance commitment levels (C-Mex), and some seem to be concerned that a reduction in the supply levels to properties will prompt customer complaints, offsetting the financial rewards of achieving PCC targets.  Field trials of devices such as LoFlo, have shown that most customers are not aware of supply levels in their property, within certain limits. Especially when moving into a new property, customers accept the levels as ‘being what it is’ and fears of an increase in customer complaints impacting C-Mex values are overrated.  In recent trials in England, where occupants did notice the change in supply, it was the positive impact of reduced flow that was cited, e.g. reduced splashing at the kitchen sink.  Not a single occupant wanted the LoFLo to be removed after the trial period

The NRv2 LoFlo can be easily and simply retrofitted to any meter installation, or meter exchange when upgrading or remediating underground meter chambers.  Thus, allowing water demand  management, with little or no impact on consumers, at the minimal cost of approximately £20 per household.  As the LoFlo is fitted at the water meter, it is the water companies fitting.  Therefore, developers must be proactive in challenging water companies to provide a standardised supply to help UK housing stock to achieve water consumption targets.