part 4

I have now assembled the solar water heater fins, made from corrugated roofing metal, filled with sand and heating pipes.

this will form the daytime heating of a 2 part heating system for my greenhouse, the next system to be added to it will be a compost water heating system for day and night heating,

how much heating this will provide, I'm not sure, but i have high hopes.

The frost has arrived and the day and night is now cold.

i miss my summer crops.