Looking to run a single heater unit into an industrial unit for a tenant who uses as a workshop (mechanic). His unit is next door to the boiler so the pipe run is only about 15m but we are unsure of what kind of heater to install for him. All he wants during the winter months is a thermostat he can set at about 18 degrees then the heater kicks in and out as required. The space is 40ft x 40ft x 30ft to the apex as a single space with a roller door that is mostly closed unless he is moving vehicles out. The shed also has insulted wall and roof panels. We are thinking running it daytime only so it needs to get the space up to temp within an hour of him turning it on.