Direct-Draw vs. Long-Draw Draft Systems: Which One Fits Your Bar?
Where you store your kegs has a major impact on how your draft system should be designed.
If the keg sits directly under or behind the bar, the system can be relatively simple. If the walk-in cooler is across the room, down the hall, or in the basement, the beer has to travel farther while staying cold and properly balanced.
That is the basic difference between a direct-draw system and a long-draw system.
Neither one is automatically better. The right choice depends on your building layout, bar design, number of products, available refrigeration, and how far the beer needs to travel.
What Is a Direct-Draw Draft System?
A direct-draw system keeps the keg very close to the faucet.
A commercial kegerator is the easiest example. The keg sits inside a refrigerated cabinet directly below the tower, so the beer only travels through a short length of beer line before reaching the faucet.
Another version is a through-the-wall system where the faucets are mounted directly on the outside of a walk-in cooler.
The main advantage is simplicity.
Because the beer travels such a short distance, there is less equipment between the keg and the faucet and less distance where temperature needs to be controlled.
Direct-draw systems can be a great fit for:
Smaller bars
Restaurants with limited draft selections
Satellite bars
Back bars
Breweries and taprooms where the cooler can sit directly behind the taps
Spaces where refrigeration can be positioned immediately next to the dispensing point
If your building layout allows it, keeping the keg close to the faucet is usually the simplest approach.
What Is a Long-Draw Draft System?
A long-draw system is used when the keg cooler is located farther away from the faucet.
Instead of traveling a few feet, the beer may have to travel across a room, through a ceiling, down a hallway, or between floors before reaching the bar.
At that point, keeping the beer cold becomes a much bigger part of the system design.
Longer commercial systems typically use a glycol power pack and an insulated trunk line.
The trunk line contains the beer lines along with glycol supply and return lines. The glycol circulates alongside the beer lines and helps maintain beer temperature throughout the run.
The glycol never mixes with the beer.
Long-draw systems make it possible to put your keg cooler where it makes sense operationally while still serving beer somewhere else in the building.
There Is Also a Middle Ground: Air-Cooled Remote Systems
Not every remote system automatically needs glycol.
For shorter remote runs, refrigerated air can sometimes be circulated through an insulated duct containing the beer lines.
The Brewers Association describes forced-air systems for beer lines that leave the keg cooler and run no more than about 25 feet. Longer systems typically move toward glycol cooling.
That does not mean 25 feet is a universal cutoff for every building.
Heat around the run, traffic through the cooler, tower design, equipment layout, and other conditions still matter.
The important point is that there are really three broad configurations:
Direct draw → short remote / air cooled → long draw / glycol cooled
Why Does Distance Matter So Much?
Beer is sensitive to temperature.
The beer in the keg may be properly refrigerated, but that does not help much if it warms up on its way to the faucet.
As beer warms, maintaining carbonation becomes more difficult and foam problems become much more likely.
A long-draw system therefore has two jobs:
Move the beer from the keg to the bar.
Keep it at the proper temperature throughout that entire trip.
In a glycol-cooled system, chilled glycol continuously circulates alongside the beer lines inside an insulated trunk line.
That extra cooling equipment is what allows a properly designed remote system to maintain beer temperature over a much longer distance.
Direct Draw: The Advantages
The biggest advantage of direct draw is simplicity.
There are fewer components, shorter beer lines, and no long trunk route through the building.
That generally means:
Simpler installation
Less equipment
Less beer sitting inside the lines
Less product displaced during cleaning
Fewer opportunities for heat to enter the system
Easier access to equipment
That does not mean direct draw is automatically cheap or maintenance-free.
You still need proper refrigeration, gas pressure, line balance, cleaning, faucets, regulators, couplers, and other equipment.
But when the building gives you the option to keep the keg close to the faucet, there is usually no reason to make the beer travel farther than necessary.
Long Draw: The Advantages
Long draw gives you flexibility.
Your walk-in cooler does not have to sit directly behind the bar.
That can be extremely valuable when you are working around:
Basement refrigeration
Multiple bars
Large restaurants
Long bar layouts
Existing walk-in locations
Limited floor space near the bar
Architectural or construction constraints
A properly designed long-draw system can serve multiple products over significant distances while maintaining consistent temperature at the faucet.
The tradeoff is that the system becomes more complex.
Long-Draw Systems Require More Planning
A glycol system is not just a direct-draw system with longer tubing.
The entire route needs to be considered.
That includes:
Number of beer products
Number of faucets
Length of the trunk line
Beer-line diameter
Vertical elevation changes
Trunk-line routing
Ambient temperatures along the route
Glycol power-pack capacity
Pump capacity
Tower cooling
Gas requirements
Access for future service
The glycol unit also needs to be sized for the actual cooling load.
If the system is undersized or the trunk route gains too much heat, the beer can arrive at the bar warmer than it left the cooler.
If the beer lines are incorrectly sized or the gas system is not balanced to the run, you can still have pouring problems even if the glycol system is working perfectly.
This is why long-draw systems need to be designed as a complete system rather than assembled one component at a time.
Which System Should You Choose?
Start with one question:
How close can the keg cooler realistically be to the faucet?
If the answer is directly underneath it or immediately behind it, direct draw may be the obvious choice.
If you are only moving beer a relatively short distance from the cooler, a properly designed air-cooled system may be possible.
If the beer needs to travel a substantial distance through the building, glycol cooling usually becomes the better solution.
But distance is only the starting point.
A good system design also considers how your staff will change kegs, where deliveries arrive, where the glycol unit can be serviced, how much cooler space you need, how the trunk line gets through the building, and what your beverage program may look like a few years from now.
Make This Decision Before the Bar Is Finished
One of the worst times to figure out your draft-system route is after walls, ceilings, millwork, and refrigeration are already installed.
A long-draw trunk line needs a viable path through the building.
A glycol power pack needs appropriate space, ventilation, electrical service, and access for maintenance.
The walk-in needs to be positioned with the draft system in mind.
The route between the cooler and bar also needs to physically accommodate the trunk line without unnecessary heat exposure or impossible bends.
These decisions are much easier during design and construction than after opening.
Planning a New Draft System?
Draft Choice designs and installs direct-draw, remote, and glycol-cooled commercial draft systems for bars, restaurants, breweries, and hospitality projects.
If you are planning a new venue or renovating an existing one, we can evaluate the cooler location, bar layout, number of products, trunk route, cooling requirements, and equipment needs before construction locks those decisions in.
The goal is simple: use the least complicated system that can reliably get your beverages from storage to the faucet at the quality you expect.
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