Commercial
A restaurant is really two climates sharing a building. On one side of the pass is the dining room, where guests have paid to be comfortable for a couple of hours. On the other side is a commercial kitchen, which is one of the hottest and most demanding environments in any workplace. The whole trick of climate control in hospitality is keeping those two worlds apart so that the heat of the line never reaches the table.
Air Con North has spent more than 25 years working on restaurants cafes and commercial kitchens across the North-East of England, in Newcastle Durham Sunderland Gateshead and out towards Carlisle. We have learned that a kitchen and a dining room can never be treated as one problem. The ventilation and the cooling have to be designed together or neither works properly. Get that relationship right and the rest of the job tends to fall into place.
Two climates, one building
Diners want a steady comfortable room. Chefs need somewhere they can physically stand to work through a long service next to ovens grills and fryers. These goals pull in opposite directions. The border between them is the pass, where plates cross from the heat of the kitchen into the calm of the floor. A good design treats that border as the key line to defend.
The mistake we see most often is a single system trying to serve both sides at once. It ends up with a kitchen that is still unbearable and a dining room that is draughty and cold, because the thermostat is forever reacting to the wrong space. The answer is separate systems designed for separate jobs, tied together by sensible ventilation so they help each other rather than fight. Once the two climates are properly divided, each one becomes a far simpler problem to solve.
Ventilation and extraction come first
In a kitchen the extraction canopy is the heart of the system. It pulls heat steam grease and cooking smells up and out before they spread. Air conditioning in a kitchen supports that. It does not replace it. If you try to cool a kitchen without sorting the extraction first you are just chilling air that is about to be pulled straight outside. You will never win that fight.
So we always look at the canopy and the ducting before we talk about cooling. Is it the right size for the equipment underneath it? Is it moving the volume of air it should? Is it in good order or is it tired and leaking? Only once the extraction is doing its job does it make sense to add cooling for the people working on the line. Spend money the other way round and you will be disappointed with both ends of it.
Make-up air
Here is the part that catches a lot of restaurants out. A powerful extraction canopy pulls a huge volume of air out of the building. That air has to be replaced from somewhere. If it is not replaced deliberately it comes in through every gap it can find, slamming doors dragging cold draughts across the dining room and leaving the canopy starved so it cannot extract properly. The symptoms show up on the floor long before anyone thinks to blame the kitchen.
Make-up air is a supply system that feeds fresh air back in to balance what the canopy takes out. Done well it means the kitchen breathes properly. The dining room is not robbed of its conditioned air. The whole building sits at a steady comfortable pressure. We size the make-up air to the extraction so the two are in balance. In colder months we can temper that incoming air so you are not blowing a North-East winter straight onto the staff by the back door.
Grease and filtration
Kitchen air carries grease. Grease is the enemy of every system it touches. It coats filters. It builds up inside ductwork. It will foul the coil of any air conditioning unit that breathes it in. A cooling unit placed badly in a kitchen airstream clogs quickly, loses performance and becomes a cleaning headache and a genuine fire risk into the bargain.
The way around it is partly placement and partly filtration. We keep cooling kit out of the greasy airstream wherever we can. We specify the right grease filters in the canopy so the bulk of it is caught before it travels. Those filters need regular cleaning. The ductwork needs periodic deep cleaning too, both for performance and for fire safety, which is a documented expectation rather than a nicety. We build all of that into a maintenance plan so it actually happens rather than being forgotten until an insurer or an environmental health officer asks the question.
Keeping diners comfortable near the pass
The hardest tables to get right are the ones nearest the kitchen. Heat escapes every time the pass doors swing. Guests seated close to it feel every surge. Nobody enjoys a meal in a pocket of warm greasy air. Those tables are the ones that quietly earn you bad reviews.
We handle this with zoning and careful placement of the indoor units. The dining room gets its own system with its own thermostat, set for guest comfort in normal clothing. We position units so the cooler air reaches the tables near the pass without creating a cold draught down the back of anyone’s neck. A draught is just as likely to ruin a meal as heat is. Getting the air movement gentle and even is the real skill. It is why we survey the room properly rather than guessing from a floor plan. The way a room actually fills over a service tells you where the trouble spots will be long before anyone sits down.
Resilience during service
A restaurant cannot stop. If the cooling fails at seven on a Friday you cannot send everyone home while an engineer is found. That is why resilience matters more in hospitality than in almost any other setting. It is worth designing in from the start rather than wishing for it later.
- Sensible redundancy. Where it is justified we split the load across more than one unit, so a single failure cools you down rather than leaving you with nothing at all.
- Quality kit. We fit equipment built for continuous commercial duty, not light-use units pushed far beyond what they were ever made to do.
- Planned servicing. Most breakdowns give warning. A serviced system is caught before it fails, usually on a quiet morning rather than mid-service.
- Fast response. When something does go wrong you want a local engineer who knows your site, not a call centre reading from a script.
None of this is about gold-plating the job. It is about matching the reliability to the fact that a dark kitchen on a Saturday night costs you a great deal more than any sensible precaution ever would.
Hygiene and the regulations
A food environment holds air conditioning to a higher standard. Dirty filters and damp trays are exactly the conditions you do not want anywhere near food, so cleanliness is not optional. We design systems that are easy to keep clean, with condensate handled properly so there are no standing pools lurking above a prep area. We service them on a schedule that keeps them hygienic as well as efficient.
There are regulatory duties too. Refrigerant systems above the relevant thresholds carry F-Gas leak-check obligations. Your extraction and ventilation sit within fire safety and workplace air quality expectations. We keep the paperwork straight and the systems compliant so that an inspection holds no surprises. Walk-in chillers and other commercial refrigeration fall under the same care. Because we cover refrigeration as well as air conditioning we can keep the whole cold and climate side of your kitchen under one maintenance plan and one phone number.
Noise and the guest experience
Comfort is not only about temperature. A unit that roars every time it kicks in changes the feel of a dining room. In a quiet intimate venue it can be the thing people remember for the wrong reasons. Nobody wants to raise their voice over the air conditioning to order a bottle of wine. We pay real attention to where units sit and how they run, because a well-chosen inverter system ticking over gently is a very different experience from an old fixed-speed unit cycling on and off all evening.
Placement is half the battle. We keep noisy plant away from the quietest tables and out of earshot of the dining room wherever the layout allows. The outdoor condensers need the same thought, especially where a restaurant backs onto homes or shares a yard with neighbours, because a unit that is fine by day can become a complaint by night. A system that is correctly sized runs calmly rather than straining, which keeps the noise down as well as the bills. Getting all of this right is far easier at the design stage than after the units are already fitted and the first guest has mentioned the hum.
Bars cafes and function rooms
Not every hospitality venue has a full commercial kitchen. A bar packs a lot of warm bodies into a small space of an evening, so the load swings wildly between a quiet afternoon and a busy Friday night. A cafe has its own pattern, with a morning rush then long quieter stretches. A function room sits empty for days then fills to capacity for an event. Each of these needs a system that can handle a crowd without freezing the place out when it is nearly empty.
The common thread is a wide swing in occupancy. That is exactly where inverter-driven kit and good zoning pay off. A function room should not be conditioned at all when it is dark, then brought up to comfort ahead of a booking. A bar needs enough capacity for a packed room on a warm night without being so oversized that it feels like a fridge on a quiet one. We size these venues around their real trading pattern rather than a single worst case. We set the controls so the space responds to how full it actually is. The result is somewhere people want to stay for another round rather than reach for their coats.
Talk to Air Con North
Every restaurant is different. The only way to get hospitality climate right is to see the kitchen the dining room and the way service flows between them. If your kitchen is punishing to work in, your diners are too warm near the pass or your extraction and cooling are clearly not working together, let us take a look. Call Air Con North free on 0800 246 5430 for a no-obligation survey and quote. We will tell you honestly what will fix it.
