http://www.BigelowBrook.com/donate The rocket mass heater is running! Watch for future videos about how I plan on converting it to a pellet burner. This is going to work well to heat the aquaponic greenhouse. Currently the building is not insulated and I can raise the temperature by 25 degrees (F). Once the building is finished and I start heating the floor, it should have no problem keeping up on a really cold day. http://www.BigelowBrook.com http://www.facebook.com/BigelowBrook