Combi Ovens Explained
A combi oven, short for combination oven, is one of the most versatile pieces of equipment in a professional kitchen. As the name suggests, it combines multiple cooking methods in a single appliance, making it a favourite across UK catering, hospitality and foodservice.
Also known as a combi-steamer, a combi oven uses dry heat, either static or fan-assisted, together with steam injected as required. Combining these functions lets chefs cook food more efficiently while keeping flavour, texture and nutritional value intact.
Why combi ovens are essential in professional kitchens
Often described as the workhorse of the kitchen, a combi oven can steam, bake, roast, regenerate and even "dry-fry" food using residual fats. That flexibility means one appliance can replace several others, saving space, energy and labour costs.
Key cooking benefits
Meat: better yield, better texture
Dry roasting can cause a joint of meat to lose up to a third of its weight through moisture evaporation. Introducing gentle steam during roasting reduces weight loss, improves tenderness and enhances overall yield, which particularly benefits carveries, pubs and banqueting operations.
Fish: perfect for delicate products
Steam is an ideal medium for cooking fish, helping preserve natural texture, moisture and subtle flavours. Combi ovens allow precise control, reducing the risk of overcooking.
Vegetables: improved nutrition and colour
Steaming vegetables rather than boiling them retains more nutrients, preserves natural colour, and keeps texture firm and appealing, making combi ovens well suited to health-conscious menus and high-quality presentation.
Baking: even, crisp results
Operating as a fan-assisted convection oven, a combi oven gives even heat distribution and consistent baking results. A light injection of steam can also improve bread, rolls and pastries, producing a crisp exterior and soft interior.
Regeneration: ideal for busy service
Food that has been pre-cooked and correctly chilled can be rapidly regenerated to serving temperature without drying out, avoiding the prolonged hot holding that can damage flavour and texture. This makes combi ovens ideal for banqueting operations, care homes and contract catering, handling both ready-plated meals and multi-portion containers with ease.
Installation requirements
Installing a combi oven is straightforward: you'll need a water supply and an energy supply, either electric, mains gas or LPG. Most UK professional kitchens can accommodate these requirements with minimal adjustment.
Choosing the right size
The correct oven size depends on the volume of food produced, the type of menu, and the service style. Manufacturers or equipment suppliers will usually calculate this for you as part of the specification and design process.
Not just for large-scale catering
Combi ovens are available in a wide range of sizes, catering for small independent cafés, pubs and restaurants, schools and care facilities, and high-volume catering and stadium kitchens. This makes them accessible to both small businesses and large operations.
Key technical questions to ask before buying
Before selecting a combi oven, it's worth asking: does steam come from a boiler system or by spraying water onto heated elements, and what does that mean for cost and performance? Why is a water filtration system needed to remove dissolved salts and prevent scale build-up? Is there a high pre-heat function for rapid heat recovery? How easy are the oven cavity and door seals to clean? What self-cleaning features are included? Are the programming controls intuitive for staff? Is there a self-diagnostic system to flag faults? Does the oven include a core temperature probe, rapid cool-down, or a reversible fan for even heat distribution?
Cleaning, hygiene and flavour control
Because a combi oven cooks many different foods throughout the day, flavours and aromas can build up, leading to flavour transfer if it isn't cleaned properly. This matters most when strongly flavoured foods such as chicken or fish are followed by delicate items like vegetables, patisserie or desserts. Many modern combi ovens include push-button cleaning cycles that wash the oven cavity and remove food residue automatically; in high-production kitchens without built-in cleaning, mobile cleaning systems can be used across multiple ovens.
Daily cleaning and end-of-shift care
The most important cleaning cycle happens at the end of each cooking shift. Any food residue left behind will harden and become difficult to remove. Regular cleaning ensures food safety, consistent cooking results and a longer equipment life.
Door seals: small part, big impact
Door gaskets are designed to withstand high heat but aren't indestructible. Common causes of damage include slamming oven doors and food debris trapped in the seal folds. Automatic cleaning cycles clean the oven cavity, but door seals should still be inspected manually and cleaned with a suitable grease detergent and cloth. Proper care significantly extends seal life and reduces replacement costs.
Managing fat and grease build-up
High-fat foods such as roast chickens can deposit large amounts of grease inside the oven. Combi ovens manage this in different ways, including built-in fat drains leading to collection containers, internal grease collection systems, or no dedicated grease management at all. Where fat traps are fitted, clean them daily to prevent hygiene issues and drainage problems.
Servicing and preventative maintenance
A combi oven combines water, heat, electricity and computer controls, elements that don't naturally work well together over time, so regular servicing is essential. A planned service contract provides preventative maintenance, early fault detection and a reduced risk of expensive breakdowns. Water treatment also plays a critical role in long-term reliability, so it's worth reading our guide to water treatment systems alongside this one.
Best practice summary
Do: fit a water treatment system, clean the oven daily, check door seals weekly, and train staff to close doors properly.
Don't: slam oven doors, trap probes in doors, mix strongly flavoured and delicate foods, allow fats to carbonise, overload the oven, leave food debris in door seals, or neglect fat drain cleaning.
Browse our range of combi ovens, or call 01304 873469 to talk through the right model for your kitchen.
Reproduced with kind permission of the Catering Equipment Suppliers Association (CESA).