Written by Jim Hopper, Wine Cooling Expert · Updated September 2026
WKL 2200 or SC PRO 2000: The Short Answer
Both are self-contained, through-the-wall units for small cellars. Breezaire sizes the WKL 2200 for about 265 cubic feet; WhisperKOOL sizes the SC PRO 2000 for about 300 cubic feet. The SC PRO's exhaust can be ducted with an optional kit, while the WKL is not designed for ductwork, and the warranties are structured differently.
Every figure below comes from the manufacturers' installation manuals, spec sheets and warranty documents, so you can compare like for like.
In short: pick the WKL 2200 for a cellar up to about 265 cubic feet with a well-ventilated room behind it, if you value Breezaire's five-year parts coverage. Pick the SC PRO 2000 for up to about 300 cubic feet, especially if you may need to duct the exhaust away or want WhisperKOOL's two-year parts and labor coverage with a five-year compressor term.
Breezaire WKL 2200 vs WhisperKOOL SC PRO 2000 Specs
Here are the two units side by side, with the CellarCool CX2200 added as a third through-the-wall option in the same size class.
Three small through-the-wall units compared (manufacturer documentation)
| Attribute | Breezaire WKL 2200 | WhisperKOOL SC PRO 2000 | CellarCool CX2200 |
|---|---|---|---|
| Cellar size (manufacturer) | About 265 cu. ft. | About 300 cu. ft. | About 300 cu. ft. |
| Rated capacity | Listed by cellar size | 1,453 BTU/h at 85°F condenser intake | 1,453 BTU/h at 85°F intake |
| Exhaust ducting | Not designed for ductwork | Exhaust can be ducted with the optional kit | Listed as through-the-wall, partially ducted |
| Warranty | 5 years parts, 1 year factory labor | 2 years parts and labor, 5 years compressor | 2 years parts and labor, 5 years compressor |
| Warm side limit | Capacity drops above 25°F over cellar temperature | Condenser intake up to 85°F | Condenser intake up to 85°F |
Breezaire WKL 2200: Simple Through-the-Wall Cooling
The WKL 2200 is the second-smallest model in Breezaire's WKL series, which Breezaire sizes from about 140 to 2,000 cubic feet. It installs upright through a wall and runs on 115 volt, 60 Hz power, with the Sentry III controller showing the intake air temperature, or the bottle temperature if the optional bottle probe is fitted.
Breezaire's instructions include a pull-down drain tube for temporarily draining excess condensate, and they call for inspecting and cleaning the condenser coil every three months. See the whole Breezaire WKL range or our Breezaire WKL, WKCE and WKSL series comparison.
WhisperKOOL SC PRO 2000: Through-the-Wall with a Ducting Option
The SC PRO 2000 is the smallest of WhisperKOOL's four SC PRO models, which WhisperKOOL sizes at about 300, 650, 1,000 and 2,000 cubic feet. WhisperKOOL describes it as a through-the-wall, partially ducted unit whose exhaust air can be ducted using the optional ducting kit.
WhisperKOOL requires a drain line for condensation, and says that failing to use it voids the warranty. Its controller shows alarm codes such as E1 for a bottle probe problem. Browse the WhisperKOOL SC PRO models or read WhisperKOOL Slimline vs SC PRO.
A closer look at the SC PRO 2000
Our video review of the WhisperKOOL SC PRO 2000, showing the unit and its controls up close.
- Through-the-wall form factor
- Controller and display
- Where it fits in a small cellar
Installation Differences That Decide the Choice
What each manual requires
| Requirement | Breezaire WKL 2200 | WhisperKOOL SC PRO 2000 |
|---|---|---|
| Exhaust clearance | At least 3 feet of unobstructed airflow into a well-ventilated room | At least 3 feet of horizontal clearance in every direction (5 feet is ideal) |
| Warm side temperature | Capacity drops if the surrounding ambient is more than 25°F above the cellar temperature | Condenser intake should not exceed 85°F to hold 55°F |
| Mounting | Upright, through the wall, no ductwork | Within 18 inches of the ceiling |
| Condensate | Pull-down drain tube for excess condensate | Drain line required |
| Outside venting | Exhaust into a ventilated interior room | Not recommended |
In practice, the room behind the cellar decides most small-cellar installs. If that room is warm or cramped, the SC PRO's ducting option can move the exhaust, while a WKL needs the room itself to be suitable. If neither works, a split system is the better route.
Electrical requirements differ by brand and model, so follow each manual and use a licensed electrician for any new circuit.
Noise and Where the Heat Goes
Neither manufacturer publishes a decibel rating for these two units. WhisperKOOL lists quiet operation as an SC feature, and Breezaire's manual is candid that the unit is a mechanical piece of equipment that will make noise and heat on the warm side.
What you hear depends mostly on the exhaust side, so place it away from quiet living areas. If noise is the priority, read our roundup of the quietest wine cellar cooling units.
How an SC PRO sounds in operation
A sound comparison test of the larger SC PRO 4000, a useful reference for the sound of the SC PRO family.
- Through-the-wall SC PRO family
- Recorded sound comparison
- Hear it before you choose
Which One Should You Choose?
- Choose the Breezaire WKL 2200 for a cellar up to about 265 cubic feet with a well-ventilated room behind it, if a five-year parts warranty matters most to you.
- Choose the WhisperKOOL SC PRO 2000 for a cellar up to about 300 cubic feet, or when you may need to duct the exhaust into another space.
- Look at the next size up if your cellar has glass, weak insulation or a warm exhaust room: the WKL 3000 and SC PRO 3000 are both sized for about 650 cubic feet.
Compare the Units
Breezaire, WhisperKOOL and CellarCool units ship free within the contiguous United States.
Wine Cooling Expert, Wine Cellar Authority
On paper these two are close. The deciding question is almost always the room behind the wall. Walk into it, check how warm it gets in summer and whether air can move, and the right unit usually becomes obvious.
Questions buyers ask when comparing these two small through-the-wall units. Tap any question to expand the answer.
What size cellar does the WhisperKOOL SC PRO 2000 cool?
WhisperKOOL sizes the SC PRO 2000 for a cellar of about 300 cubic feet, with a rated 1,453 BTU/h at an 85 degree condenser intake, assuming the cellar is fully insulated and sealed with a vapor barrier. Confirm with a heat load calculation.
What size cellar does the Breezaire WKL 2200 cool?
Breezaire's WKL sizing table lists the WKL 2200 for about 265 cubic feet in a properly constructed enclosure. Glass, weak insulation or a warm exhaust room can push you to the WKL 3000, which Breezaire sizes for about 650 cubic feet.
Which is quieter, the WKL 2200 or the SC PRO 2000?
Neither manufacturer publishes a decibel rating for these models. WhisperKOOL lists quiet operation as an SC feature, and Breezaire notes the unit will make some noise on the warm side, so where the exhaust goes matters most.
Can the exhaust of these units be ducted?
The WhisperKOOL SC PRO exhaust can be ducted with WhisperKOOL's optional ducting kit. The Breezaire WKL is not designed to have ductwork on either the warm or the cold side.
Which unit has the better warranty?
The Breezaire WKL 2200 has five years on parts and one year of factory labor. The WhisperKOOL SC PRO 2000 has two years on parts and labor plus five years on the compressor only. Which is better depends on whether you value longer parts coverage or longer labor coverage.
Do these units need a drain line?
WhisperKOOL requires a condensation drain line on the SC PRO and says not using it voids the warranty. The Breezaire WKL has a pull-down drain tube meant for temporarily draining excess condensate.
How warm can the room behind the unit be?
WhisperKOOL says the SC PRO condenser intake should not exceed 85 degrees to keep the cellar at 55. Breezaire says the WKL produces less than its stated capacity when the surrounding ambient is more than 25 degrees above the cellar temperature.
Are both units through-the-wall wine cellar cooling units?
Yes. Both are self-contained units that install through a cellar wall and exhaust warm air into the room behind it. The SC PRO can also duct that exhaust with an optional kit.
Still Deciding Between the Two?
We are an authorized dealer for both Breezaire and WhisperKOOL. Send us your cellar size and exhaust room details and we will recommend the better fit.
This comparison is general guidance based on Breezaire, WhisperKOOL and CellarCool manufacturer documentation. Final sizing, installation and electrical requirements should be confirmed with a licensed HVAC professional and the manufacturer documentation for your model.
