End the frustration of weak showers, sudden cold blasts, and slow-filling bathtubs. We supply and install high-performance unvented hot water cylinders and commercial-grade domestic systems that supply continuous, high-pressure hot water to multiple bathrooms simultaneously.

Hot water solutions focus on maximizing water volume and delivery pressure throughout larger properties or busy family homes. Unlike low-pressure gravity systems that rely on cold tanks in the loft, unvented stainless steel cylinders connect directly to the incoming cold mains water supply. Operating under high mains pressure, they provide rapid hot water delivery to power showers and baths without needing noisy external booster pumps.
Every installation is completed by directly employed, Gas Safe registered engineers with full manufacturer warranty registration and building regulations compliance certificates.
Enjoy vigorous, invigorating rainfall showers without the need for noisy electric booster pumps.
Run multiple showers and hot taps at the exact same time with zero pressure drop or temperature fluctuation.
Unvented cylinders eliminate cold water storage tanks in the loft, unlocking valuable space for attic conversions.
Constructed from premium Duplex stainless steel for unmatched corrosion resistance and durability.
Real DG Heating workmanship • 4 verified photos

Joule Cyclone 200L stainless steel unvented cylinder with expansion vessel and manifold.

Enjoy uninterrupted mains-pressure rainfall showers across multiple bathrooms simultaneously.

Factory-calibrated safety discharge valves and pressure reducing valves for complete peace of mind.

Direct connection to the cold water mains eliminating the need for cold storage tanks in your loft.
We measure your incoming mains water flow rate (litres per minute) and static pressure (bar) to specify the ideal cylinder size.
We calculate your household hot water demand based on number of bathrooms, occupants, and bath capacity (150L to 300L+).
Installed by our certified engineers with safety discharge pipework (tundish) routed in compliance with G3 building regulations.
The system is filled, pressurized, and heat-cycled to ensure maximum safety, instant hot water, and silent operation.
Answer a few simple questions for a fixed-price calculation, or arrange a complimentary technical survey with our Gas Safe team.