Sizing a Bar Fridge for Your Venue: The Complete UK Guide (2026)

The question behind “how big a bar fridge do I need?” is really “how many bottles must I keep cold through my busiest hour without running out or running warm?” Sizing bar refrigeration comes down to four numbers: bottles per metre of back-bar (a standard bottle cooler holds roughly 80–120 bottles per metre of length), your peak-hour throughput (covers × drinks-per-cover × chilled-share), the fridge’s pull-down recovery (how fast it re-chills a freshly restocked shelf on a hot Friday), and your restocking cadence (how often staff can top up from the cellar). Get those right and the bar never runs out of a cold bottle at 9pm; get them wrong and you either overspend on capacity you never fill or serve warm lager at the worst possible moment. This guide works through the maths for back-bar coolers, bottle coolers, undercounter fridges and keg cooling.

Bar refrigeration is one of the easiest things to under-buy, because a fridge that looks full on a quiet afternoon can empty in twenty minutes on a Friday night. This guide is for the trade buyer fitting out or upgrading a bar — publicans, bar managers, hotel F&B managers, cocktail bars, clubs, and event bars. It gives you the sizing maths and the format choice; Craven Cooling stocks or sources the full range of bar refrigeration to match your metres, throughput and layout. Browse the full Craven Cooling range when ready.

Decision 1: Bottles per Metre — the Core Maths

Bar refrigeration is sold in running metres of back-bar or in undercounter units, and the most useful capacity figure is bottles per metre, not litres. A standard back-bar or bottle cooler holds roughly 80–120 bottles per metre of length, depending on shelf depth, how many shelves, and the bottle size you stock.

The range is wide because bottle geometry varies: slim 330ml bottles pack denser than stubby 275ml alcopops or fat 660ml sharing bottles, and a deep three-shelf cooler holds far more per metre than a shallow single-shelf display. Work it out for your actual range: measure a shelf, count how many of your best-selling bottle stand across and deep, multiply by shelves, and you have real bottles-per-metre for your bar.

Figures are indicative for standard bottle sizes and typical shelf configurations — always confirm capacity for your specific range and the model’s shelf layout.

Decision 2: Peak-Hour Throughput and Covers

Capacity means nothing until you compare it to demand, and demand is a peak-hour number. Size the fridge to keep cold bottles flowing through your single busiest hour.

The simple sizing sum is: peak-hour covers × drinks per cover × chilled-drink share = cold bottles needed per peak hour. A pub with 120 people in at peak, each ordering ~1.5 drinks in the hour, of which ~60% are chilled bottles or bottled beers, needs roughly 108 cold bottles pulled in that hour. Your cold-bottle capacity on the shelf plus what you can restock mid-hour must comfortably exceed that.

Match that against the bottles-per-metre table: ~108 cold bottles an hour points to at least a 1.5-metre cooler holding ~120–180 bottles, so a full pre-service shelf covers the first peak hour with headroom, and staff restock between rushes rather than mid-flow. If your chilled share is higher (a cocktail or craft-beer bar), or your peak runs two hours not one, scale up accordingly.

Decision 3: Back-Bar vs Bottle Cooler vs Undercounter

There are three bar-fridge formats, and a well-set-up bar usually runs a mix of them. Each does a different job in the sizing plan.

The typical working set-up is a bottle cooler at the pour point as the high-density cold store, a back-bar cooler for the display range customers can see, and an undercounter fridge for mixers, garnishes and prep. Bottle coolers give you the most cold bottles per metre because they are built for density, not display; back-bar coolers trade some density for merchandising and drive impulse sales; undercounter fridges keep the non-display items out of your prime cold real estate. Craven Cooling stocks or sources all of these formats to your metres and layout — call with your bar dimensions and range.

Decision 4: Pull-Down Recovery on a Busy Friday

This is the spec buyers ignore and then regret. A bar fridge does two jobs: it holds already-cold bottles cold, and it pulls down the temperature of warm bottles you restock into it. The second job is where cheap or undersized units fail on a busy night.

When staff restock a shelf mid-service from warm cellar stock, those bottles arrive at maybe 12–18°C and need to reach serving temperature (~4–7°C) before they are pulled. A fridge with strong refrigeration power and good airflow re-chills a restocked shelf in a reasonable window; a weak or overloaded one takes far longer, so the bottles you pull are the warm ones you just put in. On a sustained Friday peak, poor pull-down recovery means warm lager exactly when the bar is busiest.

Decision 5: Keg Cooling and Draught

If your bar is draught-led, keg cooling is a separate sizing exercise from bottle capacity, and it is easy to overlook until the beer pours warm.

Draught lines are chilled either by a cellar cooler (the kegs and lines are cooled in the cellar, with a remote python running to the bar) or by an undercounter keg cooler at the bar for shorter runs. Sizing is driven by the number of kegs on line, the line length, and the pour rate at peak — not by bottle count. A long line run needs proper line chilling or the beer warms on its way to the tap, and a fast peak pour rate needs cooling that keeps up with throughput.

Craven Cooling stocks or sources keg coolers and bar cooling to specification — tell us the number of lines, the run length and your peak pour rate and we will match the cooling to it. Draught that pours warm at peak is a sizing failure just like a bottle fridge that runs out; both come down to matching cooling capacity to peak demand.

Decision 6: Restocking Cadence and Energy

Two final numbers finish the sizing: how often you can restock, and what the fridge costs to run once it is in.

Restocking cadence

The smaller the fridge relative to demand, the more often staff must top up from the cellar mid-service — and a cellar run at 9pm on a Friday pulls a team member off the bar exactly when you need them pouring. Size so a full pre-service load lasts your peak without a mid-flow cellar run, and plan restocks for the lulls between rushes. A slightly larger fridge that removes a Friday-night cellar trip often pays for itself in service speed and staff cost, not just in cold bottles.

Energy and running cost

Glass-door back-bar coolers draw more electricity than solid-door undercounters because the glazing gains heat and the LED display lighting runs all session. A glass froster running sub-zero draws more again. Budget the running cost at £0.27/kWh alongside the purchase price: over a fridge’s life the meter can rival the invoice, and a bar running seven nights a week feels it. Where a unit is on display it earns its higher energy through sales; where it is just cold storage, a solid door saves money every night.

Bar Fridge Formats We Stock or Source

Craven Cooling stocks or sources the full range of bar refrigeration to your metres, throughput and layout — bottle coolers, back-bar coolers, undercounter fridges, glass frosters and keg cooling. Tell us the bar dimensions, your peak-hour demand and your draught set-up, and we will match the capacity and recovery to it. Browse the categories below or call for a specification.

Worked Example: Sizing a Busy Pub Bar

A town-centre pub with a Friday/Saturday peak, sizing its bar refrigeration from scratch. The aim: keep cold bottles flowing through a two-hour peak without a mid-service cellar run.

The combination — a high-density bottle cooler at the pour point plus a back-bar cooler for display — gives roughly 270 cold bottles across the two units, comfortably above the ~216 two-hour peak demand, with a single restock during the lull between the early and late rush. Add an undercounter fridge for mixers and garnishes, and a keg cooler sized to the draught lines. Prioritise pull-down recovery on the bottle cooler so the restock re-chills before the second rush. That is a bar that never reaches for a warm bottle at peak.

Bar Fridge Sizing Checklist

Run through this before you buy. Ten minutes of arithmetic prevents the two classic mistakes: running out of cold bottles at peak, or overspending on capacity you never fill.

• ✓
  Calculate peak-hour cold-bottle demand Peak-hour covers × drinks per cover × chilled-drink share. Size for the busiest single hour — and if you have a two-hour peak, double it.
• ✓
  Work out bottles-per-metre for your actual range Measure a shelf, count your best-seller across and deep, multiply by shelves. Don’t rely on litres — bottle geometry decides real capacity.
• ✓
  Ask about pull-down recovery, not just holding capacity How fast does the unit re-chill a freshly restocked warm shelf? On a sustained peak, recovery is what keeps bottles cold after the first rush.
• ✓
  Choose the format mix for your bar Bottle cooler for density at the pour point, back-bar cooler for display, undercounter for mixers and prep, keg cooler for draught, glass froster if you frost glasses.
• ✓
  Size keg cooling separately from bottles By number of kegs on line, line length and peak pour rate. Cellar cooler + python for long runs; undercounter keg cooler for short.
• ✓
  Match the climate class to the real bar-back temperature A busy bar back with gantry lights and body heat can hit 28–30°C. Don’t fit a fridge rated for a cool room and expect it to recover at peak.
• ✓
  Plan restocking so no cellar run at 9pm A full pre-service load plus a lull restock should carry the peak. If your fridge forces a mid-rush cellar trip, it’s too small.
• ✓
  Budget running cost at £0.27/kWh Glass-door back-bar coolers and glass frosters draw more than solid undercounters. Where a unit isn’t on display, a solid door saves money every night.

For the whole bar fit-out, see our essential bar equipment checklist for pubs and cocktail bars. For ice supply behind the bar, read how to choose a commercial ice machine. For an outdoor bar, the fitting out a beer garden or café terrace guide covers outdoor bar refrigeration, and for wine service the dual-zone vs single-zone wine fridges guide covers bottle wine storage.

Frequently Asked Questions