It doesn't need to be all that technical. Depends on how you want to heat the coop. There are oil heaters thst are thermostatically controlled which are safe to use, they are heavy and aren't easily tipped over. You can use panel heaters that are 150 watts, they are either stand alone or attached to a wall. They are also coop safe. Then there are 250 watt heat lamps. You need to be very careful with lamps, if they fall to the floor or touch something, they can burn your coop to the ground. Mine are bolted, chained and tied to the wall, they can't cause trouble. Infra red lamps are an excellent heat source for sick and senior birds. It's penetrating, healing and the infra red doesn't disturb their sleep cycle like white lighting.
As for temp, keep thermometers at roosting or bird head height, offset from walls so you get accurate temps. Once you have used your set up of heat sources according to your temps, you will know how to gauge a head of time what you need to turn on to get a desired temp.
You are not looking to keep it comfortable for you, you will always feel it's cold in the coop. You are only going to bring up the temp to a level the birds bodies have learned to deal with. You don't want to damage their normal body processes by over heating them, they are created to tolerate winter and cold. Many people keep poultry up in your territory. So if you find them shivering, huddling and not moving much, not eating, sitting on feet too much, it's time to start bringing the temp up to the degree they were doing ok in before it got too cold. Watch them and see what that temp is. If thats -20F, then you should try and keep the temp around -10. You will figure all this out as you go. Ventilation is SO important to remove all the moisture from the pooping and breathing. If the moisture can't escape out the eaves, it will fall back down as frost on the combs. Frost bite is very painful. Make sure to use 2x4s with the 4 side up for roosting bars. It's very important in your climate for the birds to be able to cover their feet and toes with their breast feathers. Chickens can and do lose all their toes to frost bite, rendering the bird completely lame. Have them roost low to the floor, out of the upper moving air, roosting high is colder and wetter. Ventilation also helps to remove the ammonia that is released in their poop. Ammonia can burn their eyes and cause respiratory disease. Lastly, I suggest you obtain birds locally from a preputable breeder, someone with healthy, well acclimated birds to your climate.