Ask a UK pub or restaurant owner what’s hurting them most in 2026 and energy will come up before rent, before staff, and usually before food cost. UKHospitality reckons sector energy bills are still 65 to 80 percent above 2019 levels even after the wholesale price drops of late 2024.
What gets less attention is where the money actually goes once the bill arrives. Most operators assume it’s the ovens, the dishwasher, and the heating. The numbers say otherwise.
The biggest line item is almost always refrigeration
A 60-cover restaurant typically runs:
- One or two walk-in chillers
- A walk-in freezer
- Three to six undercounter fridges across prep stations
- Bottle coolers behind the bar
- A blast chiller if there’s any pastry going on
All of that runs 24 hours a day, seven days a week. Ovens run for six hours during service. Dishwashers run for four. The fridges never stop.
Carbon Trust analysis of UK hospitality energy use puts refrigeration at 30 to 45 percent of total electricity consumption depending on the site. For a restaurant burning £30,000 a year on power, that’s £9,000 to £13,500 going on keeping things cold.
Most of that spend is avoidable
The painful bit is how much of the refrigeration line is waste rather than necessary cooling. The big leaks, in roughly the order they bite, are:
Door seals. A perished gasket on a walk-in lets warm air pour in continuously. The compressor runs almost non-stop trying to compensate. A single bad seal can add 15 to 20 percent to the unit’s annual electricity cost. Replacing one is usually a 30-minute job.
Dirty condenser coils. The condenser is the radiator on the back or top of the unit that dumps heat. When it gets caked in kitchen grease and dust, it can’t dump heat efficiently and the compressor works harder. A choked coil can push energy use up 25 to 30 percent. They should be cleaned every three months in a working kitchen. Most are cleaned approximately never.
Wrong temperature set point. Plenty of fridges run at 1°C when 4°C would be perfectly safe and compliant. Each degree colder than necessary adds 2 to 3 percent to annual running cost.
Overstuffed cabinets. Air needs to circulate. Pack a chiller wall-to-wall and the compressor runs longer to pull the temperature down.
Failing components. A condenser fan that’s slowing down or a thermostat that’s drifting will cause the unit to run inefficiently for weeks before it fails entirely. The owner notices nothing on the front. The meter notices.
What a service actually costs vs what it saves
A planned maintenance contract for a small restaurant, covering quarterly visits across all refrigeration on site, typically runs £600 to £1,200 a year depending on equipment count.
A unit running with a perished seal, a dirty condenser, and a slightly drifting thermostat can easily cost £400 to £900 a year more in electricity than the same unit serviced. Multiply that across three or four pieces of refrigeration in a typical kitchen and the maths gets uncomfortable.
That’s before you factor in the cost of a breakdown that wasn’t caught early. A walk-in that fails on a Friday in July can write off £2,000 to £5,000 of stock, and insurers usually want proof of a maintenance schedule before they pay out.
This is why operators in London and the South East increasingly run quarterly service contracts with commercial refrigeration repair firms like Be Cool Refrigeration. The contract pays for itself on the energy bill alone, and the emergency cover is effectively included.
What else is worth doing
After refrigeration, the next biggest controllable lines are usually:
Lighting. Swapping any remaining halogen or fluorescent fittings for LED will cut lighting load by 60 to 80 percent. Payback is typically under 18 months.
Hot water. Insulating cylinders and pipework, and lowering the cylinder set point to 60°C, can cut hot water cost by 10 to 20 percent without any service impact.
Extraction. Variable speed kitchen hoods, which throttle airflow when cooking volume is low, save 30 to 50 percent on extraction energy in most kitchens.
Heating. Most restaurants overheat. Dropping the thermostat by one degree saves about 8 percent a year and almost no diner notices.
The point most owners miss
Energy isn’t a fixed cost. The bill is a function of how the equipment is set up and maintained, and most kitchens have 15 to 25 percent of their bill sitting in plain sight, waiting to be picked up.
The owners who go looking for it tend to find more than they expected. The ones who don’t keep paying for it every month, year after year, without ever quite knowing why.
