TopGas Condensing Boiler

The TopGas output range is based on five nominal burner sizes - 30kW, 35kW, 45kW, 60kW and 80kW, modulating between 6.8 and 83kW.

TopGas Condensing Boiler with Hoval Ultra Clean® Combustion System for High Efficiency/Low NOx Operation.

The Hoval TopGas condensing boiler couples high efficiency with low emissions and satisfies demands for both economy and environmental protection.

It features the Hoval Ultra Clean® combustion system with pre-mix down firing burner. This advanced burner is fundamental to the boiler achieving efficiencies of up to 109.7 net and NOx levels of 28mg/kWh and CO of 13mg/kWh.

Premix Modulating Burner Operation

With a turndown ratio of 5.1 to 1 the modulating burner ensures optimum load matching and peak seasonal performance.

The pre-mix burner automatically adjusts the air/gas mixture to the optimum proportions for the variable output range.

Applications

TopGas condensing boilers are suitable for closed central heating and domestic hot water primary supply systems. The condensing operation also makes them suitable for under floor heating installations requiring lower flow/return temperatures.

A range of matched calorifiers and Hoval pressurisation units are available.

A range of Hoval approved flue kits are available ex-stock to assist with site installation.

The pre-mix burner is suitable for either natural gas or propane operation.

• Modulating pre-mix burner
• Cast aluminium heat exchanger
• Space saving design
• Support bracket provided for easy wall mounting. Optional frame available for independent support.
• Easy service access
• Low noise, maximum 55dB(A) @ 1metre
• Electronic control module
• Concentric flue connection for room-sealed operation
• Optional flue kits available
• Optional TopTronic controller and room station for enhanced control/sequencing