Guides
Commercial Deep Fryer Buying Guide
Most fryer buying mistakes come from choosing on burner rating instead of on recovery time, or from ordering a unit the site cannot actually ventilate or power. This guide covers the decisions that matter: gas or electric, how to size by real output, what the temperature range means in service, and the installation constraints that quietly decide which fryer you are allowed to buy.
Gas vs electric
| Factor | Gas fryer | Electric fryer |
|---|---|---|
| Heat-up and recovery | Very fast heat-up; strong recovery after a large frozen drop | Slightly slower heat-up, but elements sit in the oil so heat transfer is efficient |
| Installation | Needs a gas connection and, in most jurisdictions, an interlocked extraction hood | Needs adequate three-phase supply — a two-tank unit can draw 24 kW |
| Running cost | Usually cheaper per kWh where commercial gas is available | Higher energy cost in most markets, but no gas standing charge or safety inspection |
| Temperature control | Good; thermostatic control on commercial units | Typically finer control — easier to hold a precise setpoint |
| Best for | High-volume frying, frozen product, sustained peak service | Sites with no gas supply, mall units, ghost kitchens, precision frying |
Sizing by peak output
Size the fryer to your busiest hour, not your daily average. A kitchen that copes comfortably at noon and fails at 7pm has bought for the wrong number.
| Peak output | Specify | Typical operator |
|---|---|---|
| Under 20 kg/hour | One single-tank fryer | Cafés, small bistros, side-dish frying only |
| 20–45 kg/hour | One two-tank fryer | Independent restaurant with fries plus one coated product |
| 45–90 kg/hour | Two two-tank fryers | Busy QSR; lets you separate allergens and flavour transfer |
| Over 90 kg/hour | Fryer bank with filtration | Franchise and high-volume chicken concepts |
Output bands are practical planning guidance for menu mix and service pattern, not a rating standard. Confirm against the throughput figures for the specific model you buy.
Recovery time is the number that matters
When frozen product hits hot oil, the oil temperature drops. Recovery time is how long the fryer takes to climb back to setpoint. A fryer with an impressive burner rating but slow recovery will still produce pale, oil-logged food during a rush, because every basket after the first one cooks below temperature. When you compare two fryers, ask for recovery time under a stated frozen load — not just the power figure.
Ventilation and power constraints
Fryers are classed as heavy-duty appliances producing grease-laden vapour, so nearly every jurisdiction requires a grease hood with fire suppression and adequate make-up air. This is a layout constraint, not an accessory: it determines where the fryer can physically stand. On the electrical side, a two-tank electric fryer drawing around 24 kW needs a three-phase supply — confirm the site can deliver it before you order.
COMMI two-tank fryers
| Model | Power | Temperature range | Net weight |
|---|---|---|---|
| Gas Fryer 2-Tank with Cabinet | 112.84 kW | 50–190 °C | 90–100 kg |
| Electric Fryer 2-Tank with Cabinet | 24 kW (380 V) | 50–190 °C | 70–80 kg |
Pre-purchase checklist
- Rated temperature range — 50–190 °C covers everything from proofing oil to high-temperature frying
- Oil capacity per tank, and whether tanks are fully independent (two products, two temperatures, no flavour transfer)
- Recovery time after a frozen drop — the number that decides throughput, not the burner rating
- Cold-zone depth below the elements, where crumb settles instead of burning and darkening the oil
- Drain valve size and whether the unit accepts an oil filtration trolley
- Basket lift or timer options if you run an unskilled or high-turnover crew
- Electrical supply: a 24 kW two-tank electric fryer needs three-phase, not a standard socket
- Extraction: fryers must sit under a hood with adequate make-up air in nearly every jurisdiction
- Do not specify a fryer before confirming the hood and the electrical supply — both can rule a model out after the order is placed
Frequently asked questions
Should I buy a gas or an electric commercial fryer?
Choose gas if you have a commercial gas supply and fry high volumes of frozen product — gas recovers heat quickly after a large drop. Choose electric if the site has no gas connection, or if you need precise, stable temperature control. Electric two-tank units commonly draw around 24 kW on a 380 V three-phase supply, so confirm your electrical capacity before ordering.
What size commercial fryer do I need?
Size by peak output, not by covers per day. As a working rule, a single two-tank fryer handles roughly 20–45 kg of product per hour. If your busiest hour exceeds that, buy a second fryer rather than a bigger one — two units let you separate allergens and run two temperatures.
What temperature should a commercial deep fryer run at?
Most frying happens between 160 °C and 180 °C. Below about 150 °C food absorbs oil and turns greasy; above about 190 °C oil breaks down quickly and develops off-flavours. A commercial fryer rated across 50–190 °C covers the full practical working range with headroom at both ends.
How often should fryer oil be filtered and changed?
Filter daily in a high-volume kitchen — removing suspended crumb is the single biggest factor in oil life. Change intervals depend on product, throughput and oil type rather than a fixed number of days; most operators judge by colour, smoke point and foaming. A deep cold zone and a usable drain valve make both jobs faster.
Does a commercial fryer need a ventilation hood?
In nearly every jurisdiction, yes. Deep fryers produce grease-laden vapour and are classed as heavy-duty cooking appliances, which means a Type I (grease) hood with fire suppression and adequate make-up air. Confirm the requirement with your local authority before finalising a kitchen layout, because it affects where the fryer can physically go.
What certifications should a commercial fryer carry?
It depends on your market: NSF for sanitation in much of the United States, CE for the European Economic Area, and a UL or ETL listing for North American electrical safety. Ask the manufacturer which marks apply to the exact model and destination, and request the supporting documentation rather than accepting a logo on a brochure.
Specifying a fry station
COMMI manufactures gas and electric fryers, fryer baskets and screen racks, and can quote the fry station as one package with the surrounding equipment.