Replacing a commercial hot water heater isn’t just about finding a like-for-like model, it’s about finding a solution that meets today’s requirements. In a market full of options and evolving building standards, identifying the right system can be a challenge. It’s no longer just about kilowatts and tank size; it’s about integration, reliability, compliance, and total cost of ownership.

What makes a good commercial hot water heater replacement?

The first step is understanding how the building’s hot water use has changed over time.  Has occupancy increased? Have any water saving appliances been installed within the building which means that overall demand has reduced? Does the application call for fast recovery to meet ongoing demand, or is high storage needed to cover peak periods?

WaterMaster Evo is designed to meet these needs with flexibility. It combines efficient heat delivery with robust storage, making it suitable for a wide range of applications, from schools and offices to healthcare and hospitality.

Designed for easier installation

One of the biggest challenges in replacing a hot water system is often the installation itself, especially in older plant rooms with limited space or difficult access.  Getting equipment in and out can require hiring lifting equipment, modifications, or even structural changes. 

That’s where WaterMaster Evo stands out. Its compact footprint, vertical configuration, and lightweight design make it easy to move and position, even in tight spaces.  Designed to fit through standard doorways and requiring minimal clearances, it can typically be installed without major disruption, helping keep projects on time and within budget.

Built to last in demanding water conditions

Water quality plays a major role in the long-term performance of any hot water system. In hard water areas, scale can build up quickly. In soft water zones, corrosion becomes a risk.

That’s why stainless steel is becoming the material of choice in commercial hot water heaters. The WaterMaster Evo’s tank-in-tank design, built from high-grade stainless steel, provides excellent resistance to both scaling and corrosion. It eliminates the need for sacrificial anodes or additional water treatment, making it well-suited to a wide range of site conditions.

Legionella compliance made easier

Maintaining safe hot water storage and circulation is essential in many commercial buildings, particularly those with varying occupancy such as schools, offices, and hospitality venues.

WaterMaster Evo is designed with these demands in mind. It supports Legionella risk management by maintaining consistent storage temperatures and promoting reliable water circulation throughout the system. By storing water at over 60°C, it helps inhibit Legionella growth and ensures clean, safe hot water is delivered to outlets.

A practical choice for commercial hot water

Whether you're replacing a single unit or upgrading an entire plant room, WaterMaster Evo is built to make the process easier. Available in six models, it offers a balance of performance, durability, and straightforward installation, making it a reliable fit for a wide range of commercial applications.

Also available in our range is our Commercial Combi Boiler, the HeatMaster Evo which provides both hot water and heating from one unit!