Restaurant kitchens are unusually energy-intensive commercial spaces. In 2018, U.S. food-service buildings averaged 263 thousand Btu per square foot of major-fuel energy use, compared with 70 thousand Btu per square foot for the average U.S. commercial building. The available measurements also show where that energy goes: cooking was the largest end use, followed by refrigeration and space heating. Equipment choices and operating practices therefore matter alongside the size of the kitchen.
Contents
- Restaurant and commercial-kitchen energy intensity
- How restaurant kitchen energy is used
- Annual savings from efficient equipment
- Commercial kitchen efficiency benchmarks
- Operating practices and utility savings
- Lifetime savings by equipment type
Restaurant and commercial-kitchen energy intensity
The U.S. Energy Information Administration (EIA) reported that food-service buildings averaged 263 thousand Btu per square foot of major-fuel energy use in 2018. The comparison point from the same source was 70 thousand Btu per square foot for all U.S. commercial buildings. This makes the food-service figure a useful benchmark for understanding why restaurants can have a high energy load relative to their floor area. EIA, “Food service buildings are highly energy intensive” (2018).
The building sizes in that 2018 comparison were also different. The average U.S. food-service building measured 4,800 square feet, while the average U.S. commercial building measured 16,300 square feet. These are averages for building categories, not measurements of an individual restaurant kitchen, so they should not be treated as a direct energy forecast for a particular bistro. EIA, “Food service buildings are highly energy intensive” (2018).
ENERGY STAR gives a separate current benchmark for restaurants and commercial kitchens of approximately 250,000 Btu per square foot. The same ENERGY STAR page expresses the benchmark as approximately 73 kW per square foot. ENERGY STAR identifies these as current estimates accessed in 2026, so they should be distinguished from the EIA’s 2018 survey results. ENERGY STAR, “Why Commercial Food Service Equipment?” (current estimate, accessed 2026).
| Benchmark | Measurement | Period or status |
|---|---|---|
| Food-service buildings | 263 thousand Btu per square foot | U.S., 2018 |
| All commercial buildings | 70 thousand Btu per square foot | U.S., 2018 |
| Restaurant and commercial-kitchen benchmark | Approximately 250,000 Btu per square foot | ENERGY STAR estimate, accessed 2026 |
The figures use different source methods and periods. The EIA values describe 2018 U.S. food-service and commercial-building survey categories, while the ENERGY STAR values are a current benchmark. They are useful for context, but they are not interchangeable readings from one survey.
How restaurant kitchen energy is used
Cooking accounted for 40% of end-use energy consumption in U.S. food-service buildings in 2018. Refrigeration accounted for 15%, and space heating accounted for 12%. Every other individual end use represented 7% or less of food-service-building end-use energy consumption. Together, these figures identify cooking as the dominant named end use in the EIA profile. EIA, “Food service buildings are highly energy intensive” (2018).
The end-use shares describe food-service buildings as a whole, rather than a single cooking line. They also do not mean that each restaurant has the same mix. A bistro with extensive baking, frying, or steam cooking can have a different equipment profile from a site that relies more heavily on refrigeration or prepared foods. Still, the 40% cooking share indicates why ovens, fryers, griddles, steam cookers, and holding cabinets receive so much attention in commercial-kitchen efficiency programs.
Food-service buildings made up 5% of U.S. commercial buildings in 2018 but occupied 1% of total U.S. commercial-building floorspace. The EIA’s 2018 Commercial Buildings Energy Consumption Survey also reported that the number of U.S. food-service buildings decreased 25% from 2012 to 2018; that change was statistically significant at the 90% confidence level. EIA, “2018 Commercial Buildings Energy Consumption Survey” (2012–2018).
These building-count and floorspace statistics provide national context, not a trend forecast for an individual restaurant. The measurement period is historical, and the reported 25% change is specifically the EIA’s 2012-to-2018 comparison.
Annual savings from efficient equipment
ENERGY STAR’s current estimates show a wide range of annual savings across commercial kitchen equipment. Certified commercial dishwashers are estimated to save 2,400 kWh annually, while certified coffee brewers are estimated to save 330 kWh annually. Certified electric fryers are estimated to save 1,790–2,390 kWh annually, and certified gas fryers are estimated to save 50–58 MMBtu annually. ENERGY STAR, “Why Commercial Food Service Equipment?” (current estimates, accessed 2026).
The same ENERGY STAR source estimates annual savings of 1,300 kWh for certified electric griddles and 12 MMBtu for certified gas griddles. Certified electric ovens are estimated to save 650–7,100 kWh annually, while certified gas ovens are estimated to save 18–27 MMBtu annually. The ranges show that equipment size, fuel type, and operating conditions affect the expected result.
Other current ENERGY STAR estimates include 3,000 kWh in annual savings for hot-food holding cabinets, 800 kWh for ice machines, 285–400 kWh for refrigerators, and 500–900 kWh for freezers. Certified electric steam cookers are estimated to save 11,500 kWh annually, while certified gas steam cookers are estimated to save 130 MMBtu annually. These are estimates, not guarantees for every installation, and the source presents them as current figures accessed in 2026. ENERGY STAR, “Why Commercial Food Service Equipment?” (current estimates, accessed 2026).
Commercial kitchen efficiency benchmarks
ENERGY STAR’s 2022 estimate for certified commercial gas and electric convection ovens was 20% greater energy efficiency on average than standard models. Certified combination ovens were about 30% more energy efficient than standard models, while certified single- and double-rack ovens were approximately 10% more energy efficient. ENERGY STAR, “ENERGY STAR Certified Commercial Ovens” (2022 estimate).
The current ENERGY STAR commercial-fryer specification reports that standard-vat electric fryers are about 17% more energy efficient than standard models and standard-vat gas fryers are about 30% more energy efficient. ENERGY STAR fryers must meet minimum cooking-efficiency levels of 80% for electric models and 50% for gas models. ENERGY STAR, “Commercial Fryers” (current specification, accessed 2026).
Older ENERGY STAR restaurant guidance supplies additional equipment comparisons. A 2014 guide estimated that an insulated ENERGY STAR hot-food holding cabinet used about 50% of the energy of an uninsulated cabinet. It also estimated that the most efficient commercial combination ovens used about 50% as much energy and water as inefficient models. ENERGY STAR ventilating fans were described as using 70% less energy than standard models. ENERGY STAR, “Energy Star Guide for Restaurants Putting Energy Into Profit” (2014 guide estimates).
The dates matter when comparing these figures. The oven benchmarks are from 2022, the fryer specifications are current estimates accessed in 2026, and the holding-cabinet, combination-oven, and fan comparisons come from a 2014 guide. The older guide figures should be read as legacy estimates rather than independently verified current performance claims.
Operating practices and utility savings
Equipment efficiency is only one part of kitchen energy use. The 2014 ENERGY STAR restaurant guide estimated that an ENERGY STAR steam cooker could save about $1,000 annually in water and sewer costs and another $1,100–$1,200 annually in gas or electricity costs. The guide estimated more than $2,100 in total annual savings for that steam cooker. ENERGY STAR, “Energy Star Guide for Restaurants Putting Energy Into Profit” (2014 guide estimates).
Idle time was also quantified in the guide. Eliminating one idle hour per day on a traditional electric open-system steamer was estimated to save $250–$350 in annual energy costs. Cutting four hours of idle time per day on a gas fryer was estimated to save about $400 annually, while cutting three hours of idle time per day on a gas griddle was estimated to save about $250 annually.
The guide’s equipment-specific cost estimates included about $100 in annual electricity savings for an ENERGY STAR electric fryer and about $470 in annual gas savings for an ENERGY STAR gas fryer. An ENERGY STAR electric convection oven was estimated to save about $190 annually in electricity costs, compared with about $360 annually in gas costs for an ENERGY STAR gas convection oven. An ENERGY STAR electric griddle was estimated to save about $190 annually in electricity costs, while an ENERGY STAR gas griddle was estimated to save about $175 annually in gas costs.
The same 2014 guide estimated about $650 in annual electricity savings for an ENERGY STAR hot-food holding cabinet. Turning off an uninsulated hot-food holding cabinet when the kitchen closed was estimated to save about $500 annually. These dollar values are historical guide estimates, and the source does not establish that the same savings will occur under every restaurant’s utility rates, schedule, load, or equipment condition.
Lifetime savings by equipment type
ENERGY STAR’s equipment savings fact sheet, published in 2013, estimated lifetime savings for several categories of commercial kitchen equipment. Eligible flight-type dishwashers were estimated to save $49,000 over their lifetimes, while other eligible dishmachines were estimated to save $15,000. Standard fryers were estimated to save $1,100 in electricity or $4,600 in gas over their lifetimes. Large-vat fryers were estimated to save $1,600 in electricity or $5,200 in gas. ENERGY STAR, “Equipment Savings Fact Sheet” (published 2013 estimates).
| Equipment category | Estimated lifetime savings | Measurement basis |
|---|---|---|
| Flight-type dishwashers | $49,000 | ENERGY STAR estimate, published 2013 |
| Other dishmachines | $15,000 | ENERGY STAR estimate, published 2013 |
| Standard fryers | $1,100 electricity or $4,600 gas | ENERGY STAR estimate, published 2013 |
| Large-vat fryers | $1,600 electricity or $5,200 gas | ENERGY STAR estimate, published 2013 |
| Hot-food holding cabinets | $2,800 | ENERGY STAR estimate, published 2013 |
| Ice makers | $800–$1,000 | ENERGY STAR estimate, published 2013 |
| Steam cookers | $11,100–$11,900 | ENERGY STAR estimate, published 2013 |
The fact sheet estimated that ENERGY STAR griddles could save $1,100 in gas or $1,200 in electricity over their lifetimes. It estimated $2,800 in lifetime savings for hot-food holding cabinets and $800–$1,000 for ice makers. ENERGY STAR steam cookers were estimated to save $11,100–$11,900 over their lifetimes. ENERGY STAR, “Equipment Savings Fact Sheet” (published 2013 estimates).
Because these are lifetime estimates published in 2013, they should not be presented as current prices or guaranteed payback amounts. Their value is in showing the scale difference among equipment categories: dishmachines and steam cookers have much larger reported lifetime savings than smaller refrigeration or ice-making categories in this fact sheet, while fuel choice changes the fryer and griddle comparisons.