Propane Appliances Guide: What to Buy, What to Avoid, and What It Costs to Run

When you run your home on propane, every appliance decision has a fuel cost attached to it. Not in a stressful way — but in a way that is worth understanding before you buy, not after you have been filling your tank twice as often as you expected.

This guide covers the most common propane appliances, what they actually consume, what to look for when buying or replacing them, and where people tend to get it wrong.

How Efficiency Ratings Work (And What Actually Matters)

Most propane appliances carry an efficiency rating that tells you how much of the fuel you pay for actually turns into heat or hot water.

For furnaces and boilers, this is AFUE (Annual Fuel Utilization Efficiency), expressed as a percentage. An 80% AFUE furnace converts 80 cents of every dollar in fuel into heat; the other 20 cents goes up the flue. A 96% AFUE unit wastes far less. The difference adds up significantly over a heating season.

For water heaters, the rating is UEF (Uniform Energy Factor). Higher is better. Tankless units typically carry higher UEF ratings than tank water heaters because they are not keeping a reservoir of water hot around the clock.

The practical rule: in a cold climate where your appliance runs heavily, paying more upfront for a high-efficiency unit almost always pays off over time. In a mild climate or for an appliance used lightly, the payback period stretches out.

Propane Furnaces

A propane furnace is the biggest fuel consumer in most homes. If you have one, it likely accounts for 50 to 70 percent of your annual propane use.

What they use: A standard 100,000 BTU furnace in a moderately cold climate burns roughly 500 to 1,000 gallons per year. A larger home, colder region, or poorly insulated house can push that toward 1,200 gallons or more.

What to look for when buying:

• Aim for 90%+ AFUE. Units above 95% AFUE are available and worth the premium in cold-climate homes.
• Variable-speed blower motors run more quietly and efficiently than single-speed motors.
• Two-stage heating (low and high) gives better comfort and efficiency than single-stage units that cycle on and off at full blast.

What to avoid: Old 80% AFUE units are still being sold, especially as budget replacements. In a cold climate, the fuel savings from a 96% vs. 80% unit will exceed the price difference within a few years.

Installation costs: $2,500 to $5,500 for the unit and installation, depending on the home and what is being replaced.

Propane Water Heaters

A water heater is the second-biggest propane consumer for most households — quiet, constant, and easy to forget about.

What they use: A standard 40-gallon tank water heater burns roughly 200 to 300 gallons of propane per year. A 50-gallon model runs a bit more. A propane tankless unit can use less — around 150 to 200 gallons — but it depends heavily on your household’s hot water habits.

Tank vs. tankless: The main trade-offs:

	Tank Water Heater	Tankless
Upfront cost	$700–$1,500 installed	$1,500–$3,000+ installed
Fuel efficiency	Lower (standby heat loss)	Higher (heats on demand)
Hot water supply	Limited to tank capacity	Unlimited
Maintenance	Simple anode rod replacement	Annual descaling in hard-water areas
Lifespan	10–12 years	15–20 years

For a household of four or more, or anyone who has run out of hot water during back-to-back showers, tankless is worth serious consideration. For a small household or vacation home, the payback math on tankless is harder to justify.

What to avoid: Undersized tank heaters. A 30-gallon tank in a household of three or more will leave someone cold. Size up rather than down.

Propane Ranges and Cooktops

Propane ranges are the appliance that consistently earns loyalty. Cooks who have used propane rarely want to go back to electric. The heat is instant, controllable, and responds in real time — there is no coil heating up while your garlic burns.

What they use: A propane range used for regular home cooking burns roughly 35 to 50 gallons per year. It is a small fraction of your total usage and barely moves the needle on your annual propane bill.

What to look for:

• Sealed burners are easier to clean than open burners.
• BTU output matters for high-heat cooking. Look for at least one burner in the 15,000–18,000 BTU range if you cook at high heat regularly.
• Most standard natural gas ranges can be converted to propane with a conversion kit — useful if you find a model you love.

What to avoid: Ranges without a simmer burner. At very low settings, some propane burners will snuff out. A dedicated simmer burner solves this.

Installation costs: Standard range: $700–$2,000 for the appliance. Professional installation runs $100–$300 if you need a new gas line or connection.

Propane Clothes Dryers

Propane dryers dry faster and cost less to operate than electric dryers — both because propane produces more heat per dollar than electricity in most parts of the country, and because the higher heat dries loads in less time.

What they use: About 15 to 25 gallons of propane per year for a typical household. This is a small number — propane dryers are efficient and the appliance runs in short cycles.

What to look for: Most major brands (Maytag, LG, Samsung, Whirlpool) make propane versions of their standard dryers. The appliance itself is usually priced within $50–$100 of the electric equivalent. The difference in operating cost adds up over years.

What to avoid: Do not install a propane dryer if you do not already have a gas line run to the laundry area. Adding one is possible but adds installation cost that affects the payback math.

Propane Pool and Spa Heaters

If you have a pool or hot tub, a propane heater is the fastest way to bring it to temperature — faster than electric heat pumps, which are efficient but slow.

What they use: Pool heaters are the wildcard in propane consumption. A modestly sized pool heated seasonally might burn 400 to 600 gallons over a summer. A large pool heated to a warm temperature every week can easily double that.

The honest trade-off: Propane pool heaters are great for occasional heating — heating the pool for a party, extending the season by a few weeks. For year-round or very frequent heating of a large pool, the fuel cost gets expensive fast. An electric heat pump is worth considering as a companion or alternative in those scenarios.

Propane Standby Generators

A propane standby generator connects to your existing propane tank and starts automatically when the grid goes down. For homes in areas with frequent outages, it is a significant quality-of-life upgrade over scrambling for a portable generator.

What they use: Fuel consumption depends entirely on the generator size and how long it runs. A 20kW generator running continuously burns roughly 2 to 3 gallons per hour. For a typical outage of 24 to 48 hours, that is 50 to 150 gallons. For a week-long outage, you need significant fuel reserves.

What to look for:

• Make sure your propane tank is large enough to support generator use plus your other appliances. A 500-gallon tank that is half full at the start of a winter storm provides a lot less buffer than it might seem.
• Whole-home generators typically require a 500-gallon or larger tank. Some installers will specify a minimum tank size — pay attention to it.

What to avoid: Undersizing. A generator that cannot power your essential loads — heating system, refrigerator, well pump — is a significant investment that does not deliver on its promise.

Installation costs: $4,000 to $15,000 for the generator, transfer switch, and installation, depending on system size and electrical work required.

Propane Fireplaces and Inserts

Propane fireplaces are about ambiance first, supplemental heat second. A good one will warm a room and look great doing it. They will not heat a whole house efficiently, and they should not be sized or operated like they will.

What they use: A propane fireplace running regularly through the heating season burns roughly 100 to 200 gallons per year. Daily use during cold months pushes toward the higher end.

Vented vs. ventless: Vented fireplaces exhaust combustion gases outside, like a real fireplace. Ventless units burn cleaner fuel and keep the heat inside, but some people have sensitivity to the combustion byproducts. Vented is the safer choice; ventless is more efficient.

What to look for: Realistic flame appearance, good heat output controls, and a remote or thermostat option if you want convenience. The difference in experience between a low-end and mid-range unit is noticeable.

Annual Propane Consumption Reference

Here is a summary of approximate annual usage by appliance to help estimate your total demand:

Appliance	Estimated Annual Usage
Propane furnace (whole-home heat)	500–1,200 gallons
Water heater (40-gallon tank)	200–300 gallons
Tankless water heater	150–200 gallons
Cooking range	35–50 gallons
Clothes dryer	15–25 gallons
Propane fireplace	100–200 gallons
Pool heater (seasonal)	400–800 gallons
Standby generator (occasional outages)	50–200 gallons per event

These are estimates for average use. Climate, home size, insulation quality, and household habits all affect real-world numbers.

The Practical Summary

If there is one thing to take away from this guide, it is that your furnace and water heater are doing almost all the heavy lifting in your propane budget. Getting those two right — meaning efficient, correctly sized, and properly maintained — matters far more than optimizing anything else.

The range, dryer, and fireplace are almost afterthoughts from a fuel cost perspective. Buy good ones, but do not lose sleep over their propane consumption.

And if you are sizing a tank for a new home or adding appliances, use the table above to build a rough annual estimate before you commit to a tank size. Running the numbers ahead of time beats figuring it out the hard way in January.

Related Reading

• Propane Cost Guide: What You Should (and Shouldn’t) Be Paying
• Propane Tank Sizing Guide: How Many Gallons Does Your Home Need?
• Propane Generator for Home Backup: Is It Worth It?
• Propane Fireplace vs. Wood Burning: An Honest Comparison