Infernus Countertop Gas Fryer Review: Twin Tank 12L x 2 and Single 12L LPG

Last updated: October 2026

In 30 seconds:

• The Infernus countertop LPG fryer comes in two sizes: a twin tank with two 12L tanks (from £1,049) and a single 12L tank (from £799).
• The twin is our second best-selling product by sales over the last year. Two separate tanks mean fish and chips never share oil, and you can shut one tank down when it goes quiet.
• Power is 3.7kW per tank: 3.7kW on the single and 7.4kW on the twin. Both thermostats run from 50°C to 200°C.
• Check the regulator first. The manual lists an operating pressure of 2800 Pa (about 28 mbar). That is lower than a lot of UK propane catering kit, so your Gas Safe registered engineer should match the regulator to the data plate.

Fish in one tank, chips in the other, and neither tastes of the other. That simple promise is why the Infernus twin tank sells more than any other fryer we stock.

The Infernus 12L countertop range is a popular propane choice for UK food vans, chip trailers and small takeaways that want deep tanks at a sensible price. This review covers both models, what they need to run, and who should pick a different fryer instead.

Infernus countertop LPG fryers at a glance

Every figure in this table comes from the Infernus gas fryer manual or our product listings. The manual covers both LPG models and their natural gas versions; this review is about the LPG models.

Infernus twin tank 12L x 2: for mixed menus and fish and chips

Quick specs

• Model: INF-12H-2LPG
• Tanks: two independent tanks, 12L of oil each
• Heat input: 7.4kW in total
• Temperature: 50°C to 200°C on each thermostat
• Size: 650mm wide, per the listing (W650 x D500 x H530mm)
• Safety: flame failure device and a high-limit safety device, per the listing
• Price: from £1,049
• View the Infernus twin tank 12L x 2 LPG fryer

Best for

Fish and chip vans, chicken and chips, and any menu where one product would taint the other. It also suits traders who are busy at lunch but quiet mid-afternoon.

Why two tanks beat one big one

Each tank has its own thermostat, so each one runs at its own temperature. Fish can sit in one tank while chips finish in the other.

When trade drops off, turn one thermostat to OFF and keep the other tank going. You save propane, and the oil in the idle tank lasts longer.

Honest trade-off

At 650mm, it takes almost twice the bench of the single. Measure your counter, and leave room behind it for the gas hose and the flue.

Infernus single tank 12L: the compact first fryer

Quick specs

• Model: INF-12HLPG
• Tank: one tank, 12L of oil
• Heat input: 3.7kW
• Temperature: 50°C to 200°C
• Size: 340 x 500 x 530mm, per the manual
• Safety: flame failure device, per the listing
• Price: from £799
• View the Infernus single tank 12L LPG fryer

Best for

Burger vans adding chips as a side, small kiosks, and new traders on a tight budget. It is also a handy second fryer beside a griddle.

Honest trade-off

One tank means one oil. If you fry fish, battered sausages and chips together, the flavours will mix. That is the moment to buy the twin instead.

Who should buy something else

The Infernus pair are deep-tank fryers with a simple pilot and dial. They suit most vans, but not every menu.

• Chips in big volume all day? A higher-powered single-tank fryer recovers faster. Read our Lincat DF4/P Silverlink 600 propane fryer review; it starts from £1,399.
• Want push-button ignition? These fryers light with a flame held to the pilot. Some traders prefer a fryer that sparks at the press of a button.
• Still comparing brands? Our best LPG fryer for mobile catering buying guide puts both Infernus models next to the Lincat and Parry options.

What you need before you fry

• Propane cylinders. Run it on propane only. Butane struggles to turn to gas in cold UK weather.
• The right regulator and hose. The manual lists 2800 Pa as the operating pressure. Match the regulator to the data plate, not to whatever the van already has.
• A Gas Safe registered engineer. The fryer must be installed and tested by one before you trade.
• A firm, level counter. Hot oil and a wobbly bench do not mix. Fix the fryer so it cannot slide in transit.
• Clear air around the flue. The manual lists an obstructed flue as a cause of carbon on the burners, so keep the chimney clear.
• Oil to the MAX line. Fill between the MIN and MAX marks. Oil expands as it heats.

Lighting and daily use, from the manual

The Infernus uses a standing pilot. Light it once, and the thermostat then turns the main burner on and off for you.

1. Open the gas supply and turn the thermostat knob to OFF.
2. Turn the pilot knob to PILOT and push it in. Hold it for about one minute to purge air from the line.
3. Hold a flame to the pilot until it lights. Keep the knob pressed for about 60 seconds, then let go.
4. Turn the pilot knob to ON and set the thermostat. The main burner lights and the thermostat controls it.

If the pilot goes out, wait 5 minutes before you try again so any gas can clear. After three failed tries, stop and check the troubleshooting list or call your engineer.

For a full walk-through, see our guide on how to set up and light an LPG catering fryer safely.

Frying tips the manual gives

• Fry pieces of the same size together so they cook evenly.
• Shake the basket a few times when cooking chips or onion rings.
• Drop battered food in one piece at a time, or dip the basket in the oil first.
• Smoking oil means it is too hot or worn out. Replace oil regularly.
• Keep oily foods such as fish in separate oil from potatoes and onions. On the twin, that is simply the other tank.

The biggest mistake: using the regulator you already have

Most buyers plug a new fryer into the regulator already fitted in the van. With this fryer, that can be the wrong call.

The Infernus manual gives an operating pressure of 2800 Pa, which works out at about 28 mbar. Plenty of UK propane catering kit is set for 37mbar instead; the Parry AGFP table-top fryer is one example.

A fryer on the wrong pressure will not burn as it should. The manual lists “pressure not adjusted correctly” as one cause of carbon deposits on the pilot or burners. Ask your Gas Safe registered engineer to check the data plate and set the supply to match before first use.

Looking after it

Before the first fry, wash the protective factory oil off the tank and parts with hot soapy water. The manual says not to use chlorine or sulfate cleaners.

After that, filter and change the oil regularly, and drain it only when it has cooled. If the tank will not drain, the manual says the oil may be too cold or the drain pipe blocked with debris. Our guide on how to clean an LPG fryer and change the oil covers the full routine.

FAQs

Is the Infernus twin tank fryer good for fish and chips?

Yes. The twin has two separate 12L tanks, each with its own thermostat, so fish and chips never share oil. The manual itself advises keeping oily foods such as fish apart from potatoes. That makes the twin the better Infernus for a fish and chip van, while the single suits menus built around one fried product.

How much oil does the Infernus countertop fryer hold?

Each tank takes 12L of oil, so the twin holds 24L across both tanks and the single holds 12L. The manual lists the full tank capacity as 22L per tank. Always fill between the MIN and MAX lines, never to the brim, because oil expands as it heats up.

What gas pressure does the Infernus LPG fryer need?

The manual lists an operating pressure of 2800 Pa for both LPG models, which is about 28 mbar. That is lower than the 37mbar many UK propane appliances use. Do not assume your existing regulator is right. A Gas Safe registered engineer should check the data plate and set the supply to match before you trade.

How hot does the Infernus gas fryer get?

The thermostat runs from 50°C to 200°C on both the single and the twin. On the twin, each tank has its own thermostat, so you can run two different temperatures at once. If the oil starts to smoke, the manual says it is either too hot or has broken down and needs changing.

Can I run the Infernus fryer on butane instead of propane?

Use propane only. Butane struggles to turn into gas in cold weather, so a fryer on butane can lose heat on a chilly UK morning. Propane keeps working through the winter. Buy propane cylinders and a regulator matched to the fryer’s data plate, and have a Gas Safe registered engineer connect it.

How do you light the Infernus LPG fryer?

Set the thermostat to OFF, turn the pilot knob to PILOT and push it in. Hold a flame to the pilot until it lights, keep the knob pressed for about 60 seconds, then release and turn it to ON. Set the thermostat and the main burner lights. If the pilot goes out, wait 5 minutes before trying again.

Should I buy the single or the twin tank Infernus fryer?

Buy the twin if you fry more than one type of food, or need two temperatures at once. Buy the single if you mostly fry chips as a side and have little bench space. The single is 340mm wide against 650mm for the twin, and it starts from £799 against £1,049 for the twin.

Can I buy the Infernus fryer on lease finance?

Yes, on orders over £1,000. The twin tank starts from £1,049, so it qualifies on its own. The single starts from £799, so it qualifies when ordered with other kit that takes the total past £1,000. Lease finance lets you buy the fryer and spread the cost over time.