"david" writes:

Greenhouse Heating

The Heater retails at around £60 and the 5 litre fuel refill retails at
£7.99 providing over 65 hours of burn time.

By a quick calculation you could run a 2KW electric heater
continuously for the same money, and it would cost less up front as
well. An electric heater would probably do a better job in fact as it
could be thermostatically controlled.

Anthony