TopGas max: the ideal solution for efficiently heating commercial and commercial buildings.

TopGas max: the ideal solution for efficiently heating commercial and commercial buildings.
The TopGas max wall-mounted boiler (50–150) delivers high efficiency, compact design, and versatility. Ideal for industrial, commercial, and residential projects like apartment blocks, it integrates easily into various systems, including hybrid setups.
TopGas max: a compact, quiet and cost-effective wall-mounted gas boiler.
Its compact design, quiet operation (only 51 to 53 dB(A)) and excellent value make it ideal for both new builds and renovation projects.

A modern solution, designed for your projects.
Available in outputs from 50 to 150 kW – and scalable up to 500 kW in a cascade – the TopGas max can be easily tailored to suit the needs of your building.
Its compact footprint makes it ideal for boiler rooms with limited space or for refurbishing existing plant rooms.
With integrated TopTronic E control, the system continuously modulates output from approximately 20% to 100%, optimising energy use in line with real demand.
And with low noise levels (just 51–53 dB(A)), it’s also well suited for sensitive or occupied environments.
In Detail:
Advantage | Detail |
---|---|
Compact design | Wall-mounted and space-saving – ideal for renovations or limited plantrooms |
Low noise level | Quiet operation at just 51–53 dB(A) |
High energy efficiency | Up to 98.2% at full load, and up to 108.2% at part load |
Intelligent modulation | Output modulates from approx. 20% to 100% via the premix burner |
Fuel flexibility | Compatible with natural gas, propane, and 100% biomethane |
Hydrogen-ready | Approved for natural gas with up to 20% hydrogen content |
Scalable via cascade | Combine multiple units for outputs up to 500 kW |
Hybrid system compatible | Enables up to 80% renewable energy use when paired with a heat pump |
Smart control | TopTronic E for integrated, scalable system management |
Hoval expertise | End-to-end support from planning to operation |

Conclusion: one boiler, multiple applications.
The TopGas max boiler is much more than a standard gas heating solution. With flexible integration options, excellent acoustic performance and high energy efficiency, it meets today’s demands for comfort, energy-conscious design and long-term reliability.
Ideal applications include:
Multi-residential buildings – new build or refurbishment
Commercial premises such as offices, schools, and hotels
Small industrial sites and businesses
Hybrid systems with heat pumps to maximise renewable energy use
For outputs above 500 kW, the floor-standing Hoval UltraGas 2 is the natural next step.
Author

Hoval UK