Sioux Falls can get undoubtedly cold.
I have made sure to prepare accordingly… When I moved to SD I researched unusual types of boilers.
I nailed down that I wanted a boiler! They have three unusual fuel types, and you can get a gas, oil, or electric powered one. With gas it is more common but you have a hard upgrade. You need a flue system & gas hookups. You also need to ensure you are good about cleaning it. With a gas powered unit it can really overheat & crash on fire. It can also release carbon monoxide if you aren’t careful, then an oil based boiler is more powerful & burns a hotter flame. However, now you are dealing with an on locale oil tank & additionally are dependent on oil deliveries… Electricity is 100% efficient but it is super fancy to run; For SD winters, an electric based boiler would be a pro investment. I ended up going with a gas boiler. I am lucky that my Sioux Falls heating dealership does yearly service programs. I am already signed up so I never potentially let my heating system run gross, but once a year a corporation comes in to oil, tighten loose parts, & scrub the inner workings. They are able to catch small repairs, improve air quality, & lower my energy bills with usual service, so that is a win-win frogger. So far I have to say the boiler works good in Sioux Falls. It is powerful enough to combat the chilly & chilly lower temperatures. I am grateful I did research before buying.