Heat with a fuel with (almost) guaranteed continuing low price
The price of your heating appliance is just the down payment.
The major cost of heating comes from buying the fuel over (one hopes) a substantial number of years.
When one uses petroleum, and more recently, natural gas, as well, one has a major problem.
It takes millions of years to produce it - and we've been using it for about 75 years like it's going out of style.
More problematically - the suppliers are a small number of companies that are part of a worldwide cartel.
The cartel's interest is not in providing consumers with low cost heat.
Most of the members are publicly owned companies, so they are required to publish substantial reports of their doings.
Many people needing fuel live near farmers growing wheat, rye or corn, so they have what seems to me like a great alternative.
Heat your space using one of those fuels.
There's another cartel that controls the prices of grains worldwide - but we hear little of them, for their half dozen or so members are all privately owned - so they make few public reports of their affairs.
It is almost a certainty that they will continue their policy of paying farmers peanuts for their grains.
If they could force you to buy from them, they could dictate the price - but you can buy from any of half a million or so farmers.
If your original supplier asks something like 25% over the price that he'll get at the grain dealer's - you'll soon be using another farmer as supplier.
Further, those crops are produced annually - so we aren't going to run out of them right away. There may be competition, as more people in the world become prosperous enough to begin to share the North American problem of obesity, and as more industrial processes switch to using those sources for feedstock as petroleum-based sources become more expensive.
In the area around the Great Lakes, many heat most of a home with 150 - 200 bus. of corn a year. Multiply that by the price of corn locally and ask yourself whether you are heating for that price.
There's a bonus - the products of combustion are benign. When they stoves were taken for testing originally, some of the testers redid the tests, as they couldn't believe that the corn-fired units produced so much fewer pollutants than, e.g. wood-fired heaters.
Much of the reason being that they use a combustion fan to push air through the fire, so one gets almost complete combustion.
My friend sold one brand of corn-fired heater over fifteen years ago, then another that didn't work very well, then said that he could build a better one, and did.
His has been in production for almost fifteen years and he has a lot of satisfied customers, who rarely call upon him for service.
Seems like a good idea, to me.