Furnace

This will be used to burn some waste wood / leaves.. practically anything that burns will be burned away with this one. So the heat will be moved with copper-pipes and cycled around the glycol-pipes to warm up the floor and the air in the greenhouse. That means: FREE heating! Later when the solar cells will be added, these two separate systems should make a perfect couple! :) I have more energy-saving plans for the future but with these systems the greenhouse should be quite warm always when needed. Additional gas will be used when it gets very cold. There's also heating cables inside the floor of the warm side in case of emergency! :) And of course, an electrical heater will be ready with a thermostat if something fails! Because of the decent insulating, the concrete should maintain the temperature even for long periods of time after the last heating. Later, a warm water boiler will be added to maintain the temperature even longer periods of time. It can be used with solar cells, furnace or electricity.