Air dome heating and operating costs: the blower, the heater and the real monthly bill
What it costs to run an air dome: the inflation fans at about 12,200 kWh a year on this 60 x 118 dome, a 640 MBH heater's fuel burn at full fire, and the $3 to $6 per sq ft planning range.
The blower is cheap and the heat is not. On this 60 x 118 dome, Arizon's energy estimate puts the inflation fans at about 12,200 kWh a year, roughly $1,220 at 10 cents per kWh, and the lighting at about $450 a year. Heat is the bill that depends on your climate: the original 640 MBH heater burns about 7 gallons of propane or 6.4 therms of natural gas per hour at full fire. Sports Venue Calculator's all-in operating range is $3 to $6 per sq ft per year, which is $21,000 to $42,000 a year on 7,080 sq ft. Treat that as a planning band and build your own number from the three lines below.
Three lines, not one
People ask "what does it cost to run an air dome" as if it were one number. It is three, and they behave differently. The inflation fans run every hour of the year and cost about the same in July as in January. The lighting follows your hours of use. The heater follows your climate and your thermostat, and it is the only line that can get away from you.
Line 1: inflation
A dome is held up by a small pressure difference, and the fans that maintain it run around the clock. Arizon's energy estimate for this building puts the inflation fans at about 12,200 kWh a year. At 10 cents per kWh that is about $1,220; at 15 cents it is about $1,830. Swap in your utility's rate and the fan line is settled.
The Fizer 24-2 on this dome has primary and secondary electric fans plus a propane backup engine that starts on its own if power drops or pressure falls. The backup engine is insurance, not an operating cost; it burns fuel only during an outage.
Line 2: lighting
Arizon's estimate puts the lighting at about $450 a year running six hours a day. Run it twelve hours a day and double it. The lighting and cable kit is included with this dome, so there is nothing to size here, just hours.
Line 3: heat, and how to estimate it yourself
The original Trane unit on this dome, sold separately, supplied 640 MBH of heat (640,000 BTU per hour) and 50 tons of cooling. That is the sizing reference. The fuel math from there is arithmetic:
| Fuel | Energy content | Burn at full fire, 640 MBH |
|---|---|---|
| Propane | about 91,500 BTU per gallon | about 7.0 gallons per hour |
| Natural gas | 100,000 BTU per therm | 6.4 therms per hour |
Full fire is the worst case. A heater cycles, so the real question is how many full-fire-equivalent hours your winter needs, which depends on your outdoor temperatures, the indoor setpoint and how many hours a day you hold it. A rough way to bracket it: if your heater ran the equivalent of 300 full-fire hours over a season, that is about 2,100 gallons of propane or 1,920 therms of gas. Price those at your local rates and you have a heating number you can defend. A dome in Amarillo and a dome in Minneapolis will not get the same answer, and nobody can give you one without knowing where the dome is going.
Two things work in a dome's favor on this line. Opaque fabric blocks radiant heat, which helps in summer. And a multi-layer membrane traps an insulating air gap: Centaury Plus states its double-layer design can cut heating costs by up to 30 percent compared with single-layer systems. This dome's fabric is triple wall. The exact saving on your site is not something we can quote, but a single-skin dome and a multi-layer dome are not the same building to heat.
The planning band, for a sanity check
Sports Venue Calculator's rule of thumb for annual operating cost is $3 to $6 per square foot, and they give a worked example of three tennis courts used an average of four months a year costing $60,000 to $80,000. On 7,080 sq ft their rate is $21,000 to $42,000 a year. That band is built for larger multi-court facilities with staff and programming, so a single-court dome that is only heated when it is in use can land under it. Use it to check your own estimate, not to replace it.
What is not on this list
- Cooling. If you run through a hot summer you will want it, and 50 tons was the original spec. In a cold-weather tennis or pickleball dome that closes for summer, you may not need it at all.
- Insurance, property tax and permits. Local, and worth a call before you buy any dome.
- Maintenance. Fan service, patch kits, a cable and anchor inspection. Small, but budget something.
The full project budget, including freight, engineering and the foundation, is in the cost guide. If you are weighing a dome against a steel building on operating cost, the comparison guide puts the two side by side.
Sources
- Arizon engineering submittal and installation, operation and maintenance manual for sales order A10324 (both linked from the listing page): energy estimate for inflation fans and lighting, original HVAC capacity, inflation unit and backup engine.
- Sports Venue Calculator, sports dome cost guide, accessed October 16, 2026: $3 to $6 per sq ft annual operating estimate and the three-court example.
- Centaury Plus, air dome longevity guide, accessed October 16, 2026: double-layer membranes cutting heating costs by up to 30 percent.
- Fuel energy content: propane about 91,500 BTU per gallon and natural gas 100,000 BTU per therm are standard engineering conversion figures; the burn rates above are those figures divided into 640,000 BTU per hour.