Some older buildings may need to be modified if heat losses are great. Also insulate farm shops and other buildings. If you're cold, put on layers of clothes. Use a Smaller Space Unless there is risk of pipes freezing, block off unused rooms or areas. In very cold weather, try to use and heat a smaller portion of the living area.
Most farms have access to used motor oil from farm equipment.
If so, an economical way to heat shops and other buildings is with a wood or oil-fired heater if the buildings are used often enough. Another benefit of burning used motor oil is that it makes use of a product that sometimes must be disposed of at a cost. When fuel costs are high, it is easy to overlook the value of maintenance. However, a problem in the heating system simply adds to these costs. Change the filter regularly and have the system serviced to make sure it is operating efficiently.