Commercial Hot Water Boilers – Reliable Hot Water for Every Business

Commercial hot water boiler installed in school plant room

What Are Commercial Hot Water Boilers?

A commercial hot water boiler is a high-capacity system designed to supply reliable hot water to larger buildings and business premises — including schools, hotels, restaurants, factories, care homes, and office blocks. Unlike domestic boilers, these systems are built to cope with high demand, often supplying multiple outlets simultaneously throughout the day.

At Lucas Plumbing & Heating Ltd, we specialise in the installation, repair, and servicing of commercial hot water boilers across Berkshire and surrounding areas.

Types of Commercial Hot Water Boilers

There are several types of systems available, depending on the application and building size:

1. Direct Hot Water Boilers

These heat water and supply it directly to taps or appliances without the use of a separate storage cylinder. Ideal for instant or on-demand use.

2. Indirect Hot Water Systems

Use a heat exchanger (often from a commercial heating boiler) to warm a separate hot water cylinder. Common in care homes, gyms, and large kitchens.

3. Storage Water Heaters

Often installed in places where simultaneous demand is high (e.g. schools, hotels). Store and heat large volumes of water ready for use.

4. Electric Commercial Boilers

Ideal for sites without gas access. Silent, compact, and suited to small-scale commercial applications like cafés or remote offices.

5. Point-of-Use Water Heaters

Wall-mounted or under-sink heaters used in small washrooms, staff kitchens, or hair salons.

How to Choose the Right Commercial Boiler

Choosing the best system depends on:

✅ Hot water demand
How many people will be using hot water? Will usage be steady, or in spikes (e.g. school lunch periods)?

✅ Building size & layout
Large sites may require multiple zones or decentralised systems.

✅ Fuel type
Mains gas, LPG, electric, or even renewable energy sources (like solar thermal or heat pumps) can all be considered.

✅ Available space
Wall-hung or floor-standing, vertical or horizontal — sizing is critical in plant rooms.

✅ Efficiency and regulation
ERP-rated models help lower bills and carbon emissions. We ensure all systems are WRAS compliant and Building Regs approved.

Top Commercial Hot Water Boiler Brands We Recommend

At Lucas Plumbing & Heating Ltd, we work with reliable, high-performing brands, including:

Andrews Water Heaters – Great for schools, offices, and leisure centres
Ideal Commercial Boilers – Evomax & Imax models suitable for heating and hot water
Vaillant Commercial – Energy-efficient systems with integrated controls
Rinnai – Known for commercial continuous flow hot water
Hamworthy – Modular and bespoke systems for large-scale plant rooms
Stokvis, Lochinvar, and Heatrae Sadia – Used in commercial kitchens and housing blocks