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Message: <blockquote data-quote="Retired Educator" data-source="post: 288223" data-attributes="member: 3373">Somewhat familiar with schools that heat with coal. Large buildings (perhaps like the 3 or 4 you eventually would like to heat.) the school I used to work in had coal heat with boilers (hot water heat.) Was efficient and relatively low-cost. Was also somewhat dirty. Needed smokestacks about 100' high to allow the little ash that came out to more effectively blow away. With today's standards the ash was negligible but still a little there. Hauling out the burned coal was also necessary. Required another building where a truck sat and the ash was augered into said truck and eventually hauled to  landfill. Coal came by the semi-load and was augered into a hopper bin. All this required space for trucks, etc. Kind of reminded me of my old wood-burning stove. Loved the heat, eventually tired of hauling ash and wood and the mess associated with each. Now much prefer my propane fireplace.When I was building houses we build a few with geothermal. High initial cost but efficient. Most I worked with were fields but did have one with wells. They work but seem to me to work best if you have more land available. Also all of them had the capability of additional heat added to the circulating liquid. One of the best to me had a large brick heat storage capability. About 3'X4'X6' that the liquid circulated through and in the event you lost complete power somehow kept everything warm for up to 2 weeks. Don't remember exactly how it circulated, etc. but worked great.If I were building in a rural setting I for sure would look into geothermal.</blockquote>

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