If you live outside a Minnesota metro area, you may not have access to natural gas lines — and propane becomes your primary heating fuel option. But even where natural gas is available, some homeowners consider propane for backup or off-grid situations. Here's a clear, honest comparison of propane vs. natural gas for Minnesota heating.
Price Per BTU: The Only Fair Comparison
Comparing fuel costs requires normalizing for energy content. Natural gas is sold by the therm (100,000 BTU), while propane is sold by the gallon (91,500 BTU). Direct price-per-unit comparisons are misleading without this conversion.
| Fuel | Energy Content | Typical MN Price (2026) | Cost per 100,000 BTU |
|---|---|---|---|
| Natural Gas | ~100,000 BTU/therm | $0.80–$1.20/therm | $0.80–$1.20 |
| Propane | ~91,500 BTU/gallon | $2.00–$3.50/gallon | $2.19–$3.83 |
On a per-BTU basis, natural gas is typically 2–3x cheaper than propane in Minnesota. However, if you're in a rural area without natural gas service, propane may be your only option for a gas-burning furnace — and it's still significantly cheaper than electric resistance heating in most scenarios.
Annual Heating Cost Estimate: Minnesota Home
For a typical 2,000 sq ft Minnesota home requiring approximately 100 million BTU annually for heating (a rough estimate for average climate conditions and moderate insulation):
| Fuel | Furnace AFUE | Fuel Needed | Annual Cost Estimate |
|---|---|---|---|
| Natural Gas | 96% | ~1,042 therms | $833–$1,250 |
| Propane | 96% | ~1,136 gallons | $2,272–$3,976 |
| Natural Gas | 80% | ~1,250 therms | $1,000–$1,500 |
| Propane | 80% | ~1,362 gallons | $2,724–$4,767 |
These are estimates — actual costs vary significantly based on home size, insulation quality, thermostat settings, and fuel prices. The key takeaway: high-efficiency furnaces save proportionally more money with propane because the fuel is more expensive per BTU.
Propane Considerations for Minnesota Homeowners
Tank Size and Delivery
Propane requires a storage tank on your property — typically 500 or 1,000 gallons. Tank rental or ownership adds cost. Delivery scheduling is critical in Minnesota winters; running out of propane mid-January is a real emergency. Most providers offer auto-delivery or pre-buy programs to mitigate this risk.
Price Volatility
Propane prices fluctuate more dramatically than natural gas, particularly in winter when demand spikes. Pre-buying propane in summer at lower prices can reduce annual heating costs. Natural gas, distributed via pipeline, is more price-stable in Minnesota.
Cold Weather Performance
Propane vaporizes less efficiently below -44°F, but this is rarely a concern in Minnesota (temperatures very rarely approach that threshold). Standard propane systems perform reliably through Minnesota's coldest winters. For rural propane users, see our full guide on propane furnaces for Minnesota rural homeowners.
When Propane Makes Sense
- No natural gas service available (rural Minnesota — common outside metro areas)
- Backup heating for homes with electric heat pump primary systems
- Situations where propane is cost-competitive due to local pricing
- Existing propane infrastructure already in place
When Natural Gas Is the Clear Choice
- Natural gas service is available at your property
- You're doing a new furnace installation in a metro or suburban area
- Long-term cost of ownership is a priority
- You want to avoid tank rental and delivery logistics
Furnace Efficiency Matters More with Expensive Fuel
If you're on propane, upgrading from an 80% AFUE to a 96% AFUE furnace saves roughly 17% on fuel costs. On a $3,000/year propane bill, that's $510/year in savings — making the higher upfront cost of a high-efficiency furnace pay back faster. See our guide on two-stage vs. single-stage furnaces in Minnesota and our comparison of variable-speed furnace upgrades.
Shop Goodman Propane-Ready Furnaces
Goodman furnaces can be converted for propane use with an LP conversion kit. At Furnace Direct, we stock Goodman furnaces and can help you configure the right unit for natural gas or propane. Browse our furnace collection with same-day Minnesota delivery and reach out with any questions.
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