Don’t forget about compost heat reclamation. Coil a good length of hose (30-to 60 miters works best, the more hose, the more hot water) through a fresh compost pile and reclaim the heat. My compost usually hits about 50c. It’s not much, maybe 15-20 liters at a time but the smaller the hose diameter, the faster it will pick up the heat. This obviously only works if you do a lot of compost. Temporary solution for peak season.
