Heated Tent Rentals: Event Tent Heaters, Sizing, Fuel and Fire Code

A heated tent rental is a tent, its sidewalls, one or more heaters, the fuel, the ducting and a thermostat, delivered and run as one job. Heat turns a tent business that stops in October into one that books holiday parties and winter weddings, but it adds fuel logistics, a second permit and a carbon monoxide risk that a summer tent never had.

A published package shows the parts. The Fun Ones in St. Charles, Illinois, rents a 20x40 heated tent package with a frame tent, 12 tables, 96 chairs, 120 feet of windowed sidewalls and one 80,000 BTU heater, propane included. Its page says the heater sits outside the tent with only the heat vent coming under the sidewall, needs an outlet, and is set from a thermostat inside.

If you do not run tents yet, start with how to start a tent rental business, which covers tent types, crews and the 400 square foot permit rule. This guide assumes you have the tents and want to add heat.

An indirect fired heater burns fuel inside a heat exchanger and blows only clean, heated air into the tent; the exhaust goes out a flue. A direct fired heater mixes its combustion products into the warm air it blows. Indirect fired units cost more and burn more fuel, and they are the default for enclosed tents with guests inside.

Read 16 October 2026.

United Rentals, in an article updated 29 September 2026, calls indirect fired propane and natural gas heaters "the most popular choices for event tents". It says direct fired heaters are generally not recommended in enclosed tents, except models with a fully enclosed flame, and that direct fired units are more fuel efficient and cheaper to run. L.B. White labels its direct fired Premier line "Not recommended for sleeping environments".

Patio heaters do not go under the tent. The Seattle Fire Department allows mushroom heaters 10 feet away from tents and prohibits them inside. Awesome Family Entertainment in Columbus, Ohio, rents patio heaters and says it does not recommend using them under any tent.

Size a tent heater on the volume of air and how far you need to lift its temperature, not on the floor area alone. L.B. White's chart multiplies cubic feet by the temperature rise by 0.133. United Rentals offers a quicker rule of about 20 BTU per square foot, adjusted by 10 to 20 either way for the weather. The two methods disagree by a factor of two or more.

The volume method. L.B. White's "How much heat do I need?" chart, reproduced on TentandTable's Premier listings, has three steps: measure length, width and average height for cubic feet; decide the rise, such as 50°F outside to a 70°F target; read the BTU from the table. Every row equals cubic feet × rise × 0.133. For height it uses an average: a 30 foot peak with 10 foot sidewalls counts as 20 feet.

The floor area method. United Rentals gives "approximately 20 BTUs per square foot, plus or minus 10 to 20 BTUs depending on the outside temperature", and lists what moves it: altitude, outside and target temperature, tent dimensions and peak, fabric, windows, guest count and whether guests are dancing.

BTU per hour. Our arithmetic from L.B. White's chart factor (0.133) and United Rentals' rule. The average heights are our assumptions for frame tents with 8 foot sidewalls; measure your own.

Three things follow:

• Quote from the volume method. It is the manufacturer's, it accounts for peak height, and it errs high, which is the side you want when a client is cold. L.B. White's chart itself notes results "may vary" with tent configuration, materials and weather.
• Match stock to the table. At a 30°F rise, a 20x40 sits between a Premier 40 and a Premier 80, and a 40x60 needs a Premier 170 or a Foreman 230. Two smaller heaters instead of one large one also leave you a spare if one fails.
• Watch altitude. TentandTable's Premier 170 listing says the heater is built for elevations of 0 to 2,000 feet, and that above that combustion may be improper.

The volume method needs the tent's size first: the tent size calculator gives the footprint for a guest count and seating style.

Propane is the default fuel for heated tents because cylinders are portable and most event heaters run on it. Diesel suits long, cold, large installs because one onboard tank can last the event. Electric is quiet and burns nothing, but it takes far more power than a tent site usually has.

Electric heat runs out of power fast. A 120 volt, 15 amp circuit carries 12 amps of plug in load under the electrical code, about 1,440 watts, which is roughly 4,900 BTU an hour. That barely moves the 20x20 in the table. HVAC Direct lists L.B. White's 18 kilowatt Volt 18-3 at $1,670; at 3,412 BTU per kilowatt that is about 61,400 BTU an hour, and it needs a heavy feed or a large generator. United Rentals says most electric heaters big enough for a tent need "a large generator", which can make them very expensive to run. Generator sizing and the circuit limit are in the bounce house generator guide; the same arithmetic applies to heat.

Fuel fired heaters still need a plug. The Premier 170 runs on standard 115 volt power for its fan and ignition, and United Rentals notes that many propane and natural gas heaters run on a standard 120 volt, 15 amp outlet. Put that outlet on your site checklist.

Plan fuel for the whole time the heater runs, from setup until the tent comes down, not just the party. A heater burns its rated input at full fire: divide by 91,452 for gallons of propane an hour, or by 137,381 for diesel. A 170,000 BTU propane heater at full fire burns about 1.9 gallons an hour.

Published runtimes put numbers on it:

• L.B. White's Premier 40 runs 6 to 8 hours on a 20 pound propane cylinder "in many tent applications", per LP Gas Magazine in 2020.
• Bright Event Rentals in Brisbane, California, includes a 40 pound cylinder with its 80,000 BTU propane console heater, about 8 hours of continuous use, and recommends extra propane if the heater runs during setup.
• A Canadian dealer, Cleanflow, lists the Flagro THC-175DF tent heater at 8 pounds of propane an hour, so a 100 pound cylinder lasts about 12.5 hours at full fire, by our arithmetic.

Cold weather slows propane

A propane cylinder supplies gas only as fast as its liquid can boil, and cold slows that down. L.B. White's propane tank sizing guide estimates a tank's output as diameter × length × a factor for fullness, then corrects for temperature: the multiplier is 2.0 at 20°F, 1.0 at 0°F and 0.5 at minus 10°F. In its worked example a 120 gallon tank at 0°F and 20 percent full supplies about 97,920 BTU an hour, a 250 gallon tank about 169,200, and at minus 10°F even the 250 gallon tank falls short of one Premier 170.

So on the coldest nights, a heater that is sized correctly can still starve. Manifold several cylinders, deliver a larger tank, or send the propane supplier, and make the cylinder swap your crew's job rather than the client's. Put the number of cylinders on the pull sheet like any other item, as in planning a Saturday.

Most US jurisdictions enforce an edition of the International Fire Code, and Chapter 31 sets clearances for heaters, propane and generators around tents. Heating equipment stays 10 feet from exits and combustibles, propane containers of 500 gallons or less stay 10 feet from the tent, and generators stay 20 feet away.

The section numbers below are from the 2015 IFC, as excerpted by the City of Grand Haven, Michigan, fire marshal in 2023. Later editions renumbered parts of Chapter 31, so check the edition your city enforces before you quote a section to a client.

Permits for the heater

A heated tent can need two permits: the tent permit and one for the fuel. The City of Bellevue, Washington, requires an operational permit for the storage and use of propane. The Seattle Fire Department, in an April 2025 information sheet, issues a propane heating permit (code 8207) and a diesel permit (code 1102), and requires 2A-40BC fire extinguishers with fuel fired heaters. It adds that a client renting a heater from a tent rental company usually relies on that company's permit, and that the company should supply the extinguishers.

That last line is the operator's job description. If you rent heat, expect to hold the fuel permit, bring the extinguishers and set the clearances yourself. Tent permits and the other licensing layers are in licenses, permits and inspections.

Carbon monoxide is the hazard that separates a heated tent from a summer one. OSHA's fact sheet lists propane, kerosene and oil among the fuels whose incomplete burning produces it, and says large amounts "can overcome you in minutes without warning". You cannot smell it.

OSHA's early symptoms are headache, fatigue, dizziness, drowsiness and nausea, and its exposure limit for workers is 50 parts per million averaged over 8 hours. Guests are not workers, and OSHA says young children, the elderly and people with heart or lung disease are affected sooner.

What that means on site:

• Use indirect fired heat in an enclosed tent. It vents exhaust outside; a direct fired heater puts its combustion products into the air the guests breathe.
• Point the exhaust away. Park heaters and the generator so exhaust drifts away from the heater's own air intake, the tent's doors and any gap in the sidewalls. The same logic for blower intakes is in the bounce house generator guide.
• Keep fresh air. TentandTable says to avoid running a heater in a tent with no source of fresh air.
• Give your crew a monitor. OSHA tells employers to consider personal CO monitors with audible alarms where exposure is possible. A crew member who checks on the heater mid event should carry one.

Sidewalls hold the heat in, but they change the permit and the exits. In Seattle, a tent with any walls needs a permit from 400 square feet, where a roof only canopy is exempt up to 700. Every wall, door and liner must be flame resistant, and the exits must stay usable.

Practical points for winter installs:

• Full sidewalls, windowed for daylight. The Fun Ones' 20x40 package includes 120 feet of windowed sidewalls, the full perimeter of the tent.
• Seal the bottom. TentandTable recommends sidewalls that overlap the ground by at least 6 inches.
• Bring the duct under the wall, not through a door. The Fun Ones runs only the heat vent under the sidewall, and the 2015 IFC keeps heating equipment 10 feet from exits.
• Keep contents off the fabric. The 2015 IFC, as excerpted by Grand Haven, asks for at least 3 feet between the fabric and all contents (3104.11).
• Exit curtains. Exit openings stay open unless covered by a flame resistant curtain that slides freely on a support at least 80 inches high (3103.12.3 in the 2015 edition).
• Flooring. TentandTable recommends interlocking floor or subfloor in winter tents to cut heat loss into the ground.

Every top, wall and liner needs its NFPA 701 certificate, as covered in the tent pillar. If you are buying winter walls and liners, compare them in buying event tents.

Operators who publish prices charge $125 to $475 per heater per event, usually by BTU size, and most include the propane. Ducting, extra cylinders and the attendant who swaps them are priced separately or built into the heater fee.

Prices read 16 October 2026. Signature Party's catalog is served from townandcountry.com, the site of its sister company.

What a heater costs to buy

Read 16 October 2026, before freight, tax, hoses, regulators and duct.

The payback arithmetic is quick. At The Fun Ones' rates, a Premier 170 bought at $2,250 earns its price in about 10 rentals at $225, and a Foreman 230 at $5,045 in about 12 at $425, before fuel, labor and repairs. Price heat as its own line, and add a delivery or attendant fee when the event needs a cylinder swap at 11pm. The pricing structure carries over from how to price bounce house rentals.

Most frame and pole event tents are not rated for snow. Seattle Fire says temporary tents should not be occupied during snow or ice accumulation unless designed for full structural loading, and that smaller tents should come down in snow, ice and wind events. Only engineered structures carry a snow rating.

Anchor Industries publishes the contrast. Its clear span structures are certified for snow loads up to 40 pounds per square foot, depending on width, built to the 2018 IBC and ASCE 7-16, and it pairs that rating with eave and ridge struts and continuous interior heating. Its Navi Trac tents can carry snow only with reinforcement, and must be fully enclosed and continuously heated. Anchor's snow load page gives no rating for frame or pole tents.

For a rental operator that means:

1. Write a snow clause next to your wind clause: forecast snow means the event moves, the tent is cleared, or the install does not happen. The structure for weather clauses is in your rental agreement and damage waiver.
2. Do not count on heat to melt snow off a frame tent. Anchor's continuous heating applies to its engineered structures, not to an event tent heated for four hours.
3. Plan anchoring for frozen ground. Ballast sizing for pavement and frozen sites is in tent weights.

Canadian operators work under provincial and territorial fire codes, many based on the National Fire Code of Canada 2020, which the National Research Council publishes. The NRC tells readers to check with the municipal, provincial or territorial official for the edition in force, so the IFC sections above are a guide to what to ask, not the rule.

Two practical differences: the flame test standard for tent fabric is CAN/ULC-S109, covered in the tent pillar, and some heaters are not sold there. L.B. White notes that its Volt electric heaters are not available in Canada. Prices from Canadian dealers such as Cleanflow are quoted in Canadian dollars.

Heaters run out before tents do. A business with four tents and three heaters can sell four heated tents on a cold Saturday and keep only three promises, and a heater that goes out Thursday for a Saturday wedding is gone until the strike.

Tent rental software that counts each heater as stock by quantity, and holds it from the start of the delivery window to the end of the pickup window, stops that. List each heater size as a rental item with the number you own, add a turnaround time if heaters come back needing service, and build a heated tent package that reserves the tent, its sidewalls and its heater together, so the package cannot be sold once any part of it is out.