Commercial Oven Buyer's Guide: 6 Types, Real Costs, Hood Rules

There are six commercial oven types, and each one cooks food a different way: fan-circulated air, dry-plus-steam, radiant heat off a hot stone deck, a moving belt through a heated tunnel, electric elements top and bottom, or specialty heat from a salamander, rotisserie, or speed oven cavity. Pick the wrong type and your menu fights the equipment every shift. Pick the right type and the oven disappears into the workflow. This guide breaks down what each oven does best, current price ranges, realistic lifespan, and the hood and ventilation rules under NFPA 96 that determine what your buildout actually costs.

The Six Commercial Oven Types

1. Convection Ovens

A convection oven runs an internal fan to circulate hot air across every rack position. The moving air strips the cool boundary layer off food, which cooks 20 to 25 percent faster than a standard radiant oven at the same set temperature. Rule of thumb: drop your recipe temperature 25 degrees Fahrenheit and start checking 25 percent earlier than the standard recipe calls for.

Full-size commercial convection ovens fit five sheet pans per cavity (18 by 26 inch full sheets). Half-size models fit half pans and sit on countertops, undercounters, or stands. Gas models typically run 44,000 to 80,000 BTU; electric models pull 208V or 240V single phase at 8 to 12 kW, or three-phase at 240V or 480V for higher-output units.

Best for: bakeries, cafes, banquet operations, anywhere you cook batch loads of roasted, baked, or reheated product. Full deep dive in our commercial convection oven guide.

2. Combi (Combination) Ovens

A combi runs three modes from one cavity: convection (dry heat), steam, and combination (dry plus steam at a programmed humidity percentage). You can roast a prime rib at 80 percent humidity to hold yield, drop to pure steam to cook broccoli at 212F, then run a dry 400F bake for biscuits, all in the same unit over the course of one prep shift.

Boilerless combis make their own steam from a fresh-water spray or boiler-free injection at the fan, which removes the descaling headache that plagued earlier boiler-based units. Connected combis upload recipes, log HACCP cook temps, and run automatic wash cycles overnight.

Best for: hotels, fine dining, fast casual production lines, ghost kitchens, and any operation that wants to replace a steamer, a convection oven, and a holding cabinet with one footprint. See the commercial combi oven guide.

3. Deck Ovens

Deck ovens cook food directly on a heated stone, ceramic, or steel hearth. The mass of the deck stores heat and transfers it through the bottom of the food by conduction, which is what gives artisan bread its oven spring and pizza its leoparded undercarriage. Most decks stack two or three high to multiply capacity without expanding the floor footprint.

Gas deck ovens for pizza typically run 35,000 to 50,000 BTU per deck. The deck surface temperature ceiling depends on the build: standard pizza decks hit 550F, high-end pizza decks designed for Neapolitan-style cooking push 700F to 900F with insulated stone hearths.

Best for: pizzerias, artisan bakeries, bagel shops. Full breakdown in our deck oven guide.

4. Conveyor Ovens

A conveyor oven runs a wire belt through a heated tunnel. You set belt speed and chamber temperature once, and every product that goes in comes out identical. No skill required at the door. The trade-off is menu flexibility: a conveyor cooks one product at one time and temp at a time, so menu changes mean recalibrating speed or stopping the line.

Pizza conveyors range from countertop 18 inch belts pulling about 30 amps to floor models with 32 inch belts running 100,000+ BTU. Most stack two or three high.

Best for: pizza chains, sandwich shops, c-stores, schools, anywhere consistency matters more than versatility.

5. Electric Ovens (Standard and Range Mounted)

Electric ovens deliver dry, even, radiant heat from coil or tubular elements at the top and bottom of the cavity. They install simpler than gas (no gas line, no Type 1 hood required for many ventless electric configurations), heat predictably, and hold temperature tighter than gas. The trade-off is per-hour operating cost where electricity rates run high and the slower recovery time when you load a cold product into a hot cavity.

Range-mounted ovens sit under standard 24, 36, 48, 60, and 72 inch commercial ranges. The standard cavity is around 26.5 inches wide by 26 inches deep on 36 inch and larger ranges, fitting full sheet pans front to back. If you're buying the oven and the burners together as one unit, that's covered in our restaurant ranges guide and the cooking range with oven guide. For the 4-burner build, see the 4-burner gas stove guide. For standalone electric ovens, see our electric oven guide.

6. Specialty: Speed, Steam, Rotisserie, Salamander, Microwave

Speed ovens combine convection, impingement air, and microwave to cook a panini in 90 seconds. Steam ovens (steam only, no convection) cook delicate proteins and vegetables at 212F with no flavor cross-contamination. Rotisserie ovens cook whole birds and large cuts on a rotating spit, self-basting in their own juices, and display the product through a glass door. Salamander broilers mount above the range and finish dishes with intense overhead radiant heat. Commercial microwaves reheat pre-portioned components fast.

Standalone supporting reads: what is a speed oven, steam oven commercial guide, commercial induction oven guide.

What Each Oven Type Costs

Ranges below reflect new equipment from approved manufacturers at wholesale pricing. Used and refurb runs 30 to 50 percent lower but typically lacks warranty.

Oven Type	Entry	Mid-Range	High-Capacity
Countertop convection	$600 to $1,800	$1,800 to $3,500	$3,500 to $5,000
Full-size single convection	$2,200 to $4,500	$4,500 to $7,500	$7,500 to $12,000
Double-stack convection	$4,500 to $8,500	$8,500 to $13,000	$13,000 to $20,000
Combi oven (boilerless)	$8,000 to $15,000	$15,000 to $25,000	$25,000 to $40,000+
Single deck (pizza)	$2,500 to $5,500	$5,500 to $10,000	$10,000 to $18,000
Double deck (pizza)	$5,000 to $10,000	$10,000 to $18,000	$18,000 to $30,000
Conveyor (countertop)	$2,800 to $5,500	$5,500 to $9,000	$9,000 to $15,000
Conveyor (full-size)	$8,000 to $14,000	$14,000 to $22,000	$22,000 to $40,000+
Speed oven	$5,500 to $9,500	$9,500 to $15,000	$15,000 to $22,000
Range-mounted oven (with range)	$1,800 to $3,500	$3,500 to $6,500	$6,500 to $12,000

Total Cost of Ownership

Purchase price is one line on the invoice. Plan for these additions:

• Installation: $300 to $1,500 for a like-for-like swap on existing gas and hood. New gas line drops, electrical upgrades, or hood modifications run $2,000 to $15,000+.
• Ventilation: A Type 1 grease hood, ductwork, exhaust fan, makeup air, and fire suppression on a fresh install can run $8,000 to $25,000+. Skip this number at your peril.
• Energy: Run rate scales with BTU or kW input and hours on. A 60,000 BTU gas convection running 10 hours a day at $1.20/therm burns about $22 a day in fuel.
• Maintenance and repairs: Budget 2 to 5 percent of purchase price annually. Combis sit at the high end; standard convections at the low end.

ENERGY STAR Savings That Actually Move the Needle

ENERGY STAR certified commercial ovens run about 27 percent more efficient than standard models. The lifetime utility savings on the units that qualify are real money:

• Gas convection (full size): ~$1,500 lifetime savings, around 210 MMBTU saved over the product's life
• Electric convection: ~$150 per year, ~$1,300 lifetime, 1,200 kWh per year saved
• Gas combi (5+ pan): ~$500 per year, ~$4,600 lifetime, 330 MMBTU lifetime
• Electric combi (3+ pan): ~$1,200 per year, ~$8,000 lifetime, 9,550 kWh per year
• Gas rack oven (double): ~$5,800 lifetime utility savings

Many state and utility programs pay $200 to $1,500 rebates on qualifying ENERGY STAR commercial cooking equipment. Check your utility's rebate program before you buy. The rebate plus lifetime savings often closes the gap entirely between a standard and ENERGY STAR unit.

Warranty: What to Expect From an Approved Brand

Standard manufacturer warranties on commercial ovens run 1 to 3 years parts only. Better brands include labor. Atosa, the workhorse brand on most of our cookline equipment, ships with a 2-year parts and labor warranty on cooking equipment, including the combi and convection lines. Extended warranties from third parties typically cost about 10 percent of purchase price per year.

What voids almost every commercial oven warranty:

• Improper installation by a non-licensed installer
• Unauthorized repairs or aftermarket parts
• Residential use of commercial-rated equipment
• Skipped maintenance the manual specifies (descaling, condenser cleaning, filter swaps)
• Operation outside the listed BTU, voltage, or water pressure range

Register the unit at install date, not ship date. An unregistered unit has its warranty clock start at the ship date, which can quietly burn 30 to 90 days of coverage before you even plug it in.

How Long a Commercial Oven Lasts

A well-maintained commercial oven from an approved brand runs 12 to 20 years. The cavity, racks, and frame outlast everything else. The components that fail first, in order:

• Door gaskets: 2 to 5 years. Replace when you see compression set, tears, or heat escaping past the seal.
• Thermocouples and igniters: 3 to 7 years on gas units. Cheap part, fast swap.
• Fan motors (convection and combi): 7 to 12 years. Bearings dry out, motor windings burn.
• Control boards: 8 to 15 years on units with digital controls. Less of a concern on dial-thermostat models.
• Heating elements (electric): 5 to 10 years. Replace individual elements as they fail.
• Combi steam generators or spray injectors: 5 to 10 years if you descale on schedule, half that if you don't.

Pull the door gasket annually, calibrate the thermostat with a probe thermometer every six months, vacuum the convection fan housing and exhaust vents monthly, and descale combi units on the schedule the manual lists. Those four habits push the average lifespan from 12 years to 18 or 20.

When to Replace vs Repair

Repair when: a single component fails on a unit under 10 years old, parts are available, and the repair cost is under 30 percent of replacement. Replace when: the control board on a 12+ year old unit fails (parts often discontinued), the cavity has rust through, energy use has crept up 25+ percent over baseline, or you've poured more than 50 percent of replacement cost into repairs in 24 months.

Hood and Ventilation: What Commercial Code Requires

Commercial cooking equipment that produces grease-laden vapors, smoke, or steam falls under NFPA 96, the standard that most state and local codes adopt for commercial kitchen ventilation. NFPA 96 is not a suggestion. If your inspector cites it and you don't have it, you fail and you don't open.

Type 1 vs Type 2 Hoods

A Type 1 hood is rated for grease-laden vapors. It has grease baffles, a continuous gutter to collect drippings, fire suppression nozzles tied to a UL 300 wet chemical system, and ductwork that's welded liquid-tight and pitched back to the hood. Required over: deep fryers, charbroilers, griddles, ranges with open burners, conveyor pizza ovens running grease-containing product, rotisseries, and most combi ovens cooking proteins.

A Type 2 hood is rated for heat, steam, and odor only. No grease. Lighter construction, no fire suppression required. Allowed over: dishwashers, steamers, electric convection ovens cooking non-greasy product only, and some pizza decks cooking dough and cheese without raw protein toppings.

Bottom line: if it produces grease, it needs Type 1. If you're not sure, your AHJ (authority having jurisdiction, usually the local fire marshal) decides.

Ventless and Listed Equipment

Some combi ovens, speed ovens, and electric convection ovens carry a UL 710B or KNLZ listing that allows installation without a Type 1 hood under specific conditions. The listing includes: an integrated catalytic converter or condenser, an ANSUL or equivalent suppression system inside the cabinet, and limits on what you can cook (no raw bacon, no heavy grease loads). Listed ventless is real and code-compliant where local AHJs accept it, and it can save $15,000 to $25,000 on a buildout. Confirm with your inspector before you spec the unit.

CFM Sizing

Exhaust CFM (cubic feet per minute) requirements depend on hood style, equipment under the hood, and duty rating:

• Wall canopy hood, light duty (steamers, electric convection): 150 to 200 CFM per linear foot of hood
• Wall canopy hood, medium duty (ranges, gas convection, standard pizza decks): 300 CFM per linear foot
• Wall canopy hood, heavy duty (fryers, charbroilers, combination ranges): 400 CFM per linear foot
• Wall canopy hood, extra heavy duty (solid fuel, mesquite, wood-fired): 550 to 700 CFM per linear foot
• Island canopy hood: add 25 to 50 percent over wall canopy for the same duty rating

A 10 foot wall canopy over a medium-duty cookline pulls 3,000 CFM. That same exhaust requires balanced makeup air, typically 80 to 85 percent of exhaust CFM, supplied through a tempered MUA unit so you're not depressurizing the building and starving the gas appliances of combustion air.

Duct, Termination, and Clearance

Grease duct on a Type 1 hood is welded 16-gauge carbon steel or 18-gauge stainless, continuously liquid-tight, sloped 1/4 inch per foot back toward the hood or a grease trap. Clearance to combustibles: 18 inches if unwrapped, less with listed wrap or zero-clearance assembly. Termination: vertical through the roof, minimum 40 inches above the roof surface, and 10 feet horizontally from any building opening, intake, or property line.

Gas, Electric, Propane: Picking Your Fuel

Natural gas is the default in most established commercial kitchens. Cheaper per BTU than electricity in most markets, faster recovery on heavy loads, and every approved oven brand makes a natural gas SKU. Downsides: higher install cost (gas line, hood, permits), produces combustion byproducts that drive your CFM requirement up, and rate volatility year over year.

Electric installs simpler, runs cleaner, and supports more ventless configurations. Trade-offs: higher per-hour operating cost in expensive electricity markets, slower recovery on cold loads, and dedicated 208V, 240V, or 480V three-phase circuits for higher-output equipment.

Propane (LP) is the fuel of food trucks, mobile catering, and rural sites without natural gas service. Every approved gas oven sold by The Restaurant Warehouse ships with a propane conversion kit or is available as a factory-LP build. Full procedure in our gas range propane conversion guide.

How to Pick the Right Oven for Your Restaurant

1. Start with the menu. List your top 10 selling items and how each gets cooked. A pizza-heavy menu points to deck or conveyor. A roast-and-bake menu points to convection or combi. A sandwich-and-panini menu points to speed oven plus undercounter convection.
2. Match capacity to your peak 15 to 30 minute demand window, not your daily average. Count covers during the busiest half hour of service, multiply by the pans-per-cover ratio your menu requires, and size for that number. Daily-average sizing is how undersized ovens get bought, and it's the single most common buyer mistake. Pair a combi with a holding cabinet if your rush is short and intense, that protects yield without forcing you up to the next cavity size.
3. Match the pan capacity to your sheet pan workflow. Use the table below.
4. Measure the footprint. Confirm clearance behind, beside, and above the unit. Combis need 2 inches sides and 4 inches back minimum. Convections need 1 inch sides and 6 inches back. Deck ovens need 4 inches sides for service access.
5. Verify utilities. Existing gas line pressure (5 to 14 inches water column for most commercial gas), electrical service (single vs three phase, amperage), water (for combis), drain (combis and steamers).
6. Check the hood. If your existing hood doesn't cover the new equipment with 6 inches of overhang front and 0 inches sides minimum, you're rebuilding the hood too.
7. Verify the certifications. Required for most commercial buildouts: NSF or NSF-equivalent (sanitation, required by most health departments), UL or ETL (electrical safety on electric units), AGA or CSA (gas safety on gas units), and ENERGY STAR (efficiency, optional but unlocks rebates). Insurance and AHJ inspectors look for these marks on the data plate. No mark, no install.
8. Plan installation. Get the install quote before you buy the unit. Surprises here kill projects.

Pan Capacity and Footprint by Oven Size

Oven Size	Pan Type	Pan Count	Cavity Volume	Best For
Full-size	18 x 26 inch full sheets	5 to 10 pans	4 to 6 cu ft	High-volume bakery, banquet, full-service restaurant
Half-size	13 x 18 inch half sheets	4 to 6 pans	2 to 3 cu ft	Cafes, ghost kitchens, supplemental oven on a busy line
Quarter-size	9 x 13 inch quarter sheets	3 to 4 pans	1 to 1.5 cu ft	Food trucks, small kiosks, warming or proofing duty
Range-mounted	Full sheets front to back on 36+ inch ranges	1 to 2 pans	2.5 to 4 cu ft	Restaurant ranges paired with cooktop above

Pick the size that matches your most-used pan, not your largest. A bakery running 95 percent half-sheets is better served by a stackable double half-size convection than by one full-size unit.

The Approved Brands We Stock

Our oven inventory pulls from Atosa for combi, convection, and range-mounted ovens; BakeMax for deck and bakery convections; CookRite for conveyor and pizza decks; Comstock-Castle for pizza decks and conveyors. Brand-specific reads: Atosa combi oven setup guide.

Frequently Asked Questions

Can I use a residential oven in my restaurant?

No. Residential ovens fail health inspection in every jurisdiction that adopts the FDA Food Code. They're not NSF-listed, they're not rated for continuous duty, and they don't carry the certifications your liability insurance requires. Even where a tiny operator gets away with it temporarily, the first inspection or insurance audit shuts you down.

Do I need a hood over an electric convection oven?

Depends on what you cook. An electric convection used only for non-greasy baking (cookies, bread, par-baked product) typically falls under Type 2 hood requirements (heat and steam only, no grease). The moment you bake bacon, roast a chicken, or finish anything with rendering fat, you need a Type 1 grease hood. Listed ventless electric convections exist; verify with your AHJ.

What's the most versatile single oven I can buy?

A combi. It replaces a convection oven, a steamer, a holding cabinet, and a low-temp roaster in one cavity. The trade-off is purchase price ($8,000 to $40,000+) and the descaling discipline required to keep the steam side functional.

Gas or electric: which is cheaper to run?

Gas wins on per-BTU fuel cost in most US markets. Electric wins on install cost, ventilation simplicity, and rate stability. Run a 5-year total cost of ownership comparison using your actual utility rates and projected daily hours of use. The breakeven varies by market and operating hours.

How much hood CFM do I need over a 36 inch range with a standard oven below?

Medium duty wall canopy: 300 CFM per linear foot of hood length. A 4 foot hood covering a 36 inch range (with proper 6 inch overhang each side) pulls 1,200 CFM exhaust, plus matched tempered makeup air.

What's the lifespan of a combi oven?

10 to 15 years if you descale on the manufacturer's schedule, vacuum the cavity filter weekly, and replace door gaskets when they show compression set. 5 to 8 years if you don't descale. Hard water without treatment kills combis faster than any other oven type.

Do conveyor ovens need a hood?

Conveyor pizza ovens cooking standard pies (cheese, pepperoni) typically require a Type 1 grease hood because of the rendering fat from pepperoni and sausage. A few low-profile electric conveyors carry a UL 710B listing for ventless installation; verify before you buy.

What's a salamander broiler used for?

Finishing dishes with intense overhead heat: melting cheese on French onion soup, browning a casserole top, caramelizing creme brulee sugar, toasting open-faced sandwiches, finishing a steak with a quick salamander pass for surface color. Mounts above the range or on the wall to save line space.

Are countertop convection ovens worth it?

For a low-volume cafe, food truck, ghost kitchen, or backup oven, yes. A quality half-size countertop convection runs $1,500 to $3,500, fits half sheet pans, plugs into a standard 120V or 208V outlet, and handles 90 percent of what a full-size unit does at a quarter of the footprint.