I have only been here a short time and I have seen this question many times. " I live in _____, will____ survive in winter?
It may not be an option to everyone, but a rocket stove mass heater. This is what it is ... http://www.richsoil.com/rocket-stove-mass-heater.jsp
And this is mainly how it can be applied... https://youtu.be/qtFvdMk3eLM
I only plan on a platform under the tanks.
Heating the water to warm the greenhouse will work better than heating the air to warm the water.
A wood burning stove heats the air with tons of wood, and most heat is released out the chimney... a rocket stove uses minimal wood but maximum heat retention.
Research on the subject reveals many options for endless applications. This was already my greenhouse plan before I stumbled on growing fish the easy way. (AP)
If this only helps one other person I'll be happy.
