Keg Room Design for Bars, Taprooms and Restaurants
Beer caves, back-bar and draft systems
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Updated October 14, 2026
Quick answer
A keg room is a walk-in cooler held at keg temperature, about 36 to 38°F, with room to rotate kegs, a clear path to the door and space for the draft system's regulators, couplers and often a glycol power pack nearby. Size it for the kegs you hold at peak plus a delivery, not just your tap count.
Planning checklist
- Capacity: kegs on tap, backup kegs and a full delivery.
- Layout: first-in, first-out rotation, wide door for hand trucks.
- Temperature: 36 to 38°F, steady, with an alarm.
- Refrigeration: sized for delivery loads of warm kegs, not just holding.
- Glycol: power pack location with ventilation and service access.
- Drainage and floor: spills and line cleaning water need somewhere to go.
- Gas: CO2 and blended gas stored and ventilated safely.
Rules for new walk-ins
New walk-ins must meet federal efficiency requirements such as automatic door closers and insulation minimums, and new remote condensing units installed after 27 July 2026 face a 1,400 GWP refrigerant limit. See the rules tracker and walk-in cooler guide.
Common design mistakes
- Refrigeration sized only for holding temperature, not for pulling down warm deliveries
- Glycol power pack in an unventilated closet
- No floor drain or a floor that slopes away from it
- Door too narrow for a hand truck
- No temperature alarm
Sizing guide
| Question | Why it matters |
|---|---|
| Kegs on tap | Base load |
| Backup kegs per line | Peak inventory |
| Largest single delivery | Pull-down load: warm kegs need many hours to chill |
| Other product stored | Food must stay at 41°F or below |
| Door traffic | Infiltration load |
The Brewers Association manual's chill tables show a keg at 44°F needs about 18 hours to reach 38°F; design refrigeration for a full delivery of warm kegs, not just holding.
Glycol power pack placement
Put the power pack where it can breathe: a ventilated room or outdoors with the clearance the manufacturer lists, and close enough to keep the trunk line short. The manual notes glycol systems serve runs longer than 25 feet; shorter runs from a keg room to a nearby bar may use direct-draw or air-cooled designs.
Layout tips
- Keg racks or rows with a clear aisle for rotation.
- Gas regulators and manifolds mounted where staff can read them.
- Couplers and lines labeled by tap.
- Lighting and a thermometer that staff check daily.
- A floor drain and a floor sloped toward it.
Bay Area factors
Bay Area keg rooms are often retrofits in older buildings with limited power and space. Check electrical capacity early, plan condensing unit location with neighbors and noise in mind, and expect building and electrical permits for new walk-ins.
Refrigeration choices
A keg room is a walk-in cooler, so the same choices apply: a self-contained or remote condensing unit, refrigerant that meets the rules in force when it is installed, and enough capacity for warm deliveries. For new remote condensing units installed after 27 July 2026, EPA's interim limit is 1,400 GWP. Size the evaporator to keep air moving across stacked kegs without blowing directly onto the lines.
Safety
Store CO2 and blended-gas cylinders upright and secured, and follow your local fire code and the gas supplier's guidance on ventilation and detection. Keep the door operable from inside.
What our technician checks on a new keg room
- Refrigeration capacity vs your delivery and holding load.
- Evaporator placement and airflow over kegs.
- Door closer, gasket and inside release.
- Temperature alarm and controls.
- Power pack location and ventilation if glycol is used.
Common keg room problems we see
| Problem | Usual cause |
|---|---|
| Warm after deliveries | Undersized refrigeration |
| Ice on evaporator | Door left open, defrost settings |
| Water on the floor | Drain blocked, spills |
| Foam on taps furthest away | Trunk or glycol issues |
| Door not closing | Closer, hinge, floor heave |
Bay Area permits
New walk-ins and condensing units in Bay Area cities usually require building and electrical permits, and California's energy code applies to refrigeration equipment. Plan permit time into your opening schedule.
Design checklist
- Delivery path from truck to keg room without stairs if possible
- Door width for hand trucks and double-stacked kegs
- Temperature alarm with a remote notification
- Space for future taps and a larger power pack
- Lighting bright enough to read regulators and coupler labels
- Shelving for cleaning supplies kept outside the beer storage area
Retrofitting an existing space
When a keg room goes into an existing basement or storeroom, check ceiling height for stacked kegs, the floor's ability to drain, and the route for refrigeration lines to the condensing unit. Walk-in panels can often be fitted into irregular spaces, but the condensing unit needs somewhere to reject heat: a roof, an exterior wall or a ventilated room.
When to call a technician
Have the refrigeration sized for warm-keg pull-down after deliveries; undersized keg rooms run warm every delivery day.
Open 7 days, 8 AM to 5 PM, with emergency service until 9 PM. CA Lic. #776244.
Frequently asked questions
How cold should a keg room be?
About 36 to 38°F.
Does a keg room need a glycol system?
Short runs can be direct-draw; long runs to remote towers need glycol cooling.
How big should a keg room be?
Large enough for peak inventory plus one delivery, with space to rotate kegs.
Do I need a permit to build a keg room?
New walk-ins usually need building and electrical permits; check with your city.
What temperature should a keg room be?
34 to 38°F for storage, with 36 to 38°F the manual's cooler target.
Can I convert an existing walk-in to a keg room?
Often; check refrigeration capacity for delivery loads and space for regulators and lines.
How big should the condensing unit be?
Sized by a refrigeration contractor for your box, door traffic and delivery load.
Should the keg room have an alarm?
Yes; a remote temperature alarm catches failures overnight.
Can the keg room share refrigeration with a food walk-in?
It can be part of a combined walk-in if it holds 34 to 38°F and has the capacity; design it for both loads.
Related guides
Sources
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