The Riva 40 insert stove is the smallest in the range with a nominal heat output of 4.9kW. The Riva 44 insert stove is Defra Exempt meaning that you can burn wood on it in smoke control areas.
A great addition to the Stovax Riva range and designed to fit into a 22" high and wide fireplace opening.
The Riva 55 is an 8kW inset stove which is Defra Exempt for woodburning in smoke control areas. Heat from the Riva 55 stove can be ducted to other rooms in the house either passively or fan-assisted.
The Riva 66 is a portrait inset stove with a nominal heat output of 8kW. Like the other Riva inset stoves the 66 is Defra Exempt for smoke control areas.