TopGas® classic
Exhaust connection
Condensation heat exchangers

made of corrosion-resistant materials with excellent thermal conductivity for high energy yields.

Efficient grid burner system

provides for clean and low emission combustion.

Air blower for optimised combustion
Heating circuit pump
Control panel with electronic heating control for modulating operation.

TopGas® classic


TopGas® wall-mounted boilers offer compact and advanced gas heating technology built to the high quality standards of Hoval. Due to the condensation technology the TopGas® boiler is approximately 15 % more efficient than your non-condensing boiler. 

Economical and compact.
For flats, entire floors, and single-family and multi-family homes.

Low in emissions and consumption
Savings with energy costs
Compact, complete system
Top quality