As I mentioned earlier, the Barn is heated. I chose radiant floor for it's efficiency. One drawback it that it takes a long time to increase the temp in the building, by the same token it takes a long time to cool off. I envisioned leaving the Barn at a cold but above freezing temperatur of 45F, than cranking the heat up to 60F for the time I wanted to do something in there. But it takes about 24 hours and a crap load of heating oil to do it. So I leave the temp at 65F now at all times during the Winter. Temps get higher on Sunny days. I have an 875 gallon capacity for storing oil (tanks can be seen in one of the exterior shots). The one and only year I have heated the building so far I didn't need any more than that and had some leftover. Part of the 875 gal capacity is a 55 gal drum located next to the furnace in the furnace room. The furnace can draw oil directly from the exterior tanks, or I can switch it to the 55 gal drum. When I have waste oil I pour it into the 55 gal drum, then use a pump to top off the drum and dilute it with home heating oil. When dilute it make little difference to the heater, and save me a few bucks in heating oil and the hassle of disposal.
The room for the furnace by the way is a good place to stor my large vacuum, mop bucket etc.
Hot water is supplied to the bathroom with a point of service hot water heater. Thes units draw a massive amount of current when in use, but since they only use the power when in use (water flowing) they don't use anywhere near as much power as a traditional water heater. For a infrequently used area they are fantastic, and take up very little space to boot. They can be purchased according to amount of hot water needed per minute. I chose a flow rate that would allow for a nice hot shower.
Pics of Furnace/55gal drum, manifolds for radiant floor heat, point of service water heater.
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