Commercial hot water has a precision problem. We've built something to fix it.
Most commercial buildings can tell you whether their hot water system is running. What they can’t tell you is how much usable hot water is actually in the cylinder at any given moment, at what temperature, and whether the system is heating more than it needs to in order to meet demand.
That distinction matters more than it might seem. In hotels, leisure facilities, and high-footfall commercial buildings, hot water demand is rarely predictable or consistent. It varies by time of day, day of week, and season, and it can shift significantly depending on occupancy and use. A conventional gas-fired water heater connected to a BMS gives you system status. Mixergy gives you something more useful: precise, real-time data on volume and temperature at every point in the cylinder, and the ability to heat only what you actually need, when you need it.
The result is a system that stops heating water it doesn’t have to. For sites with high and variable hot water demand, that’s where the meaningful energy savings come from.
Built for commercial demands
The Mixergy commercial range covers applications from shops and offices through to stadiums and hotels, running from 400 litres to 2,000 litres with up to 54kW of total immersion power available. It runs on direct electric and can connect with commercial heat pumps, VRF systems, and solar PV. An optional heat exchanger module makes integration with heat pumps and other external heat sources straightforward, without requiring significant changes to the wider system.
The cylinders are BMS-compatible via Modbus TCP, feeding granular volume and temperature data back into the platforms your team already uses, rather than sitting outside them as a separate system to manage.
The core technology is patented top-down heating. Rather than heating the full volume of stored water every cycle, the system heats only what is needed, in precise increments. Paired with precision-level sensing, you know exactly how much usable hot water is available at any point. That removes the tendency to oversize and overheat as a buffer against uncertainty, which is where a significant amount of energy waste in commercial hot water systems originates.
Compliance built in
For facilities managers and building operators, Legionella control is a standing obligation under HSE L8 guidance. The Mixergy commercial range includes fully programmable pasteurisation cycles, so thermal disinfection is scheduled, recorded, and consistent. That reduces the manual burden on maintenance teams and provides a clear audit trail for compliance purposes.
The cylinders are constructed from duplex stainless steel and carry a 25-year warranty, subject to terms and conditions. For asset managers thinking about lifecycle cost and planned maintenance schedules, that’s a material consideration.
Proven at scale
British Land installed Mixergy at a major London site and achieved complete removal of gas-fired hot water. The result was 600kWh of energy saved per week, with a payback period of under a year. That’s not a projected figure. It’s monitored, real-world performance from a live commercial site.
For energy and sustainability leads working toward net zero commitments, that kind of evidence matters. For facilities managers and asset managers, a sub-one-year payback changes the conversation around capital approval.
Why now
Energy costs remain high. Decarbonisation commitments are tightening. And the pressure to demonstrate measurable progress, not just stated targets, is growing across every sector. Replacing a gas-fired water heater with an intelligent, connected system is one of the more straightforward interventions available to commercial building operators. It doesn’t require a new heating strategy. It works with what’s already there.
Mixergy’s commercial range is available now, and our team is taking enquiries.
If you manage a commercial building or portfolio and want to understand what the range could do for your site, fill in the form below. We’ll be in touch to talk through your requirements.
