We have a large Dayton heater with dual forced air blowers which uses natural gas to heat the equipment garage area of our maintenance building. We also have a smaller forced air gas heater for our small office, break room, restroom and chemical storage area. The main mechanic shop area has a smaller single fan gas heater as well.
We purchased a 115,000 BTU add-on wood burning furnace to heat our main shop area.
Link to the company where we purchased the unit with specifications.
Picture of unit in place in the shop.
We placed the add-on heating unit in a central location of the equipment storage area along the back wall. We ran 2 flexible 8" heat ducts to a couple of different sections of the building to assist in moving the heat to where it is needed. We are able to keep the area in the 55-60 degree range which is fine for our shop area. We have about $ 1,800 in the unit and the duct work. The unit will pay for itself this winter and we should see some additional savings of $1-2,000 this season. Our heat bill runs approximately $4.5-5,000 a season for the entire maintenance facility.
The picture below shows the 8" flexible duct pipe that we ran through the rafters to help distribute the heat to other sections of the building.
We placed a 6 mil piece of plastic across the entire shop area to reduce the amount of area that we want to heat on a regular basis. The area in the back does retain some temperature so it is warmer than the outside and does reduce wear and tear of our batteries on the equipment that is stored in this section of the shop. We can also pull the liner back to allow eat to enter this area when the crew is forced inside due to extreme weather conditions. The equipment that we use in the winter is stored in the back as well which will reduce heat loss when we open doors to go out and complete our work for the day.
Plastic liner(background) between the heated area and reduced heat section of the shop.