While doing some research before building my shop many years ago, I came across a little book printed by Alberta Ag. The thing that really left an impression on me was a section where they talked about using really good insulation and doors. The example shop was 40x60x16. That' 2400 sq ft. They broke down heat loss into ceiling, walls, windows, doors, foundation, floor. With R40 ceiling, R20 walls, and a modest R value in the grade beam and maybe floor, the whole BTU requirement for the building was only 14,000 btu. That was with no doors or windows. Then you start adding BTU for all the perforations in that perfectly sealed wall. 40,000 BTU for a big OH door 20x14 and on and on. So you can see how important good doors and windows are.My shop accounts for roughly 40% of my total gas bill. House and shop are on same meter. So some pretty rough numbers here. Can't really say about electricity costs as there are too many variables so I'll just give you the natural gas heating costs.
I will use last years numbers as we had a very cold winter in 17/18.
Taking 40% of the natural gas consumption for the 6 month heating season I came up with 175GJ to heat the shop. Our current gas cost is $2.24/GJ plus $1.5 for cost of service for a total of $3.74 per GJ.
Thats a total heating cost of $654 for the winter heating season or about $109 per month.
This year's costs will be down a bit with a warmer winter.
I'm not including the stupid Alberta Carbon Levy of $1.517 per GJ or $265 for the winter as this is a BS tax that I'm confident will go away with a new spring government.:9:
If you want to do a little number crunching as to heating cost for your proposed building, just expand these numbers by a per cent factor. One GJ of energy equals 948,000 btu. Since BTU is for a time of one hour, then you must multiply your BTU rating for your building x 24 hours if you keep your heat on all the time. For example in my shop, similar size and numbers to the example, if I use 50,000 BTU total heat loss would be 948,000 btu/ GJ divided by 50,000 BTU per hour = 19 hours per GJ of energy. So 19 hours for the cost per GJ of energy, say 3.00 plus the carbon tax that we all hope goes away!! of 1.50 ?? equals $4.50 for 19 hours = .24 cents per hour or $5.76 per day. I always looked at it like it was no more expensive to heat my shop than to have a couple of vehicles plugged in 24/7. The benefits were obvious.