Which are the best and safest heaters to use in a greenhouse?
Stephanie, by email
A ANNE SAYS My first choice would be a thermostatically controlled electric fan heater but these must have safe fittings installed by a qualified electrician. Ours is switched on all winter and set to come on when needed. Thermostatically controlled gas heaters are available, too. Paraffin types are usually lit in the evening and will stay on all night. Unfortunately, gas and paraffin heaters cause extra condensation.