5 Signs Your Wine Cooling System Is About to Fail
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Wine Guardian TTW04B Defender Through-The-Wall Wine Cellar Cooling Unit
Wine Guardian | SKU:
WGTTW04BE1LCD2A0BHF
$7,159.00
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Wine Guardian TTW04B Defender Through-The-Wall Wine Cellar Cooling Unit is backordered and will ship as soon as it is back in stock.
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Wine Guardian TTW04B Defender Through-The-Wall Wine Cellar Cooling ...
$7,159.00
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THINKING ABOUT THE PERFECT WINE CELLAR? SAVE TIME AND MONEY—GET EXPERT ADVICE NOW!
Call our Wine Cellar Specialist at 1 (800) 260-1712 for FREE CONSULTATION!
Defender Series · Through-The-Wall
Wine Guardian TTW04B Defender Through-The-Wall Wine Cellar Cooling Unit
The Wine Guardian TTW04B Defender is the top-tier, self-contained through-the-wall cooling unit, delivering a nominal 3,760 BTU/h at 75°F for small wine cellars and displays in the most demanding environments. It pairs precise temperature and humidity control with an Exterior Wall Package, Electric Heater, and the Ultra Quiet Package for whisper-quiet operation as low as 56.9 dBA.
The TTW04B Defender is the flagship of Wine Guardian's redesigned Through-the-Wall (TTW) line, sitting above the Sentinel and Classic. It delivers the same precise cooling on the TTW platform but adds every available feature, making it the choice for collectors who need reliable conditions in challenging or variable environments. Explore the complete Through-the-Wall collection to compare configurations.
As an authorized Wine Guardian dealer, Wine Guardian Dealer offers the full TTW Defender line with expert selection support, so you can confirm the right capacity and configuration for your space before you buy.
3,760
BTU/h nominal
56.9dB
at 6 ft
0–125°F
ambient rated
71lb
weight
Cooling capacity is rated under standard conditions. Actual sizing depends on cellar insulation, glass exposure, ambient temperature, and other factors. Always confirm the right model with Wine Guardian's sizing calculator and a qualified professional before purchase.
Who It Is For
Is the TTW04B Defender Right for You
✓ Ideal For
Collectors and trade buyers with small wine rooms or displays in demanding settings, including exterior walls, garages, or spaces with wide temperature swings, who want full temperature and humidity control, heating, and the quietest TTW operation available.
× Consider Another Model If
You do not need exterior-wall rating, heating, or the Ultra Quiet Package (choose the TTW04B Sentinel), you want the value temperature-only option (choose the TTW04B Classic), or you need a different cellar capacity (step down to the TTW02B Defender).
Key Features
TTW04B Defender Features and Benefits
| Feature | What it means for your cellar |
|---|---|
| Whisper-Quiet + Ultra Quiet Package | Operates as low as 56.9 dB at 6 feet (2 m), the quietest in its capacity class, with sound reduction foam plus added grille dampening. |
| Precise Temperature Control | Holds cellar temperatures from 42°F to 75°F while minimizing the fluctuations that harm wine. |
| Humidity Sensor | Combined thermostat and humidistat allows seamless connection of a Wine Guardian humidifier for proper humidity. |
| Condensate Evaporator | Internal re-evaporation system manages condensate to prevent leakage, often without a dedicated drain line. |
| Exterior Wall Package | Exterior grille and coated condenser coil rated for 0°F to 125°F ambient conditions. |
| Electric Heater | Built-in heating coil warms cellar air when the temperature drops below the set point in cold spaces. |
Triple fail-safe protection: a condensate overflow switch, a loss-of-charge switch, and an auto-reset high-pressure switch help prevent water damage, protect the compressor, and reduce system downtime.
See It in Action
See the TTW04B Defender in Action
Watch How It Works
See the Wine Guardian Through-the-Wall system in action and how its smart, self-contained design protects your collection.
- Through-the-wall installation, no ductwork
- Exterior-rated with heater and humidity control
- Quietest operation in its class with the Ultra Quiet Package
Questions about fit? Call our specialists at (800) 260-1712.
Whisper-Quiet
How Quiet Is It
The TTW04B Defender measured at six feet, against everyday sounds.
60 dBNormal conversation
56.9 dBTTW04B Defender at 6 ft
55 dBElectric toothbrush
50 dBModerate rainfall
45 dBQuiet library
Installation
Installation Requirements
The TTW04B Defender is designed for do-it-yourself installation between standard wall studs. A wall sleeve or the included mounting bracket supports the unit, which slides through the opening. With the Exterior Wall Package it can exhaust through an exterior wall in rated outdoor conditions.
Installs through an interior or exterior-rated wall
Mounting bracket included; wall sleeve available separately
Internal condensate evaporator often eliminates a drain line
Standard USA Type B plug; 60Hz power (US/Canada)
This is general guidance only. Final placement, electrical requirements, drainage, and ventilation should be confirmed with Wine Guardian's official documentation and a licensed HVAC professional or qualified contractor.
In the Box
What’s Included
TTW04B Defender cooling unit
Mounting bracket
Owner's manual, brochure, and spec sheet
Specifications
Full Technical Specs
ModelTTW04B Defender
Cooling Capacity2,350–4,270 BTU/h (nominal 3,760 BTU/h @ 75°F)
Line Frequency60Hz (USA, Canada, and most of Central & South America)
Power770 W, FLA 12 A, MCA 14 A, 120V, single phase
Plug TypeStandard USA Type B (NEMA 5-15)
Dimensions33.8 × 14.1 × 15.75 in
Weight71 lbs
Temperature RangeMaintains cellar conditions from 42°F to 75°F
Ambient Range0°F to 125°F with Exterior Wall Package
CondensateInternal condensate re-evaporator (no drain line typically required)
RefrigerantNon-flammable, low global warming potential
Noise LevelAs low as 56.9 dB at 6 ft (2 m)
ConfigurationSelf-contained, through-the-wall, air-cooled, ductless
Exterior RatedYes, with Exterior Wall Package
Optional Accessories
Compatible Add-Ons
Wall Sleeve and Hardware
94H0054-00
Remote Interface Controller
91H0105-01
Exhaust Duct Collar
19H0018-00
Wine Cellar Humidifier
99H0174-21
Also available: Exhaust Duct Collar (19H0018-00) and Duct Collar Kit (94H0010-00). Browse all parts and accessories, or explore related ducted and ductless split systems.
Related Models
Compare Across the Line
Browse the full Through-the-Wall range or all wine cellar cooling units.
FAQ
Frequently Asked Questions About the TTW04B Defender
How do I determine the size of a wine cellar cooling unit?
Sizing depends on cellar volume, insulation quality, glass exposure, ambient temperature, and door seals, not square footage alone. The TTW04B Defender is rated at a nominal 3,760 BTU/h at 75°F. Confirm the correct capacity with Wine Guardian's sizing calculator and a qualified HVAC professional before purchase.
How do I install the Wine Guardian TTW04B Defender?
The TTW04B Defender is built for do-it-yourself through-the-wall installation between studs using a wall sleeve or mounting bracket. With its Exterior Wall Package it can exhaust to an outdoor-rated wall. Confirm final placement, electrical, and ventilation with a licensed professional.
How quiet is the Wine Guardian TTW04B Defender?
The TTW04B Defender operates at about 56.9 dBA at 6 feet, the quietest option in its capacity class. It combines internal sound reduction foam with the Ultra Quiet Package for extra noise dampening around the grilles.
Does the Wine Guardian TTW04B Defender control humidity?
Yes. The TTW04B Defender includes a humidity sensor that combines a thermostat and humidistat, allowing a Wine Guardian freestanding humidifier to be connected to help maintain roughly 55 to 65 percent relative humidity for long-term storage.
What makes the TTW04B Defender different from the Sentinel and Classic?
The Defender is the top-tier Through-the-Wall series. On top of the Sentinel's humidity sensor and condensate evaporator, it adds an Electric Heater, the Exterior Wall Package (coated condenser coil rated for 0 to 125°F ambient), and the Ultra Quiet Package.
How often should a wine cellar cooling system be serviced?
Plan on periodic cleaning of the coils and filter plus an annual inspection. Always follow the maintenance schedule in your unit's documentation and use a qualified HVAC professional for service to protect both performance and your collection.
When should I replace my wine cellar cooling system?
Common signs include an inability to hold temperature, rising noise or vibration, short-cycling, or repeated repairs. A qualified professional can confirm whether replacement is the right step for your TTW04B Defender setup.
Need Help Confirming the Right Wine Guardian Model?
Not sure if the TTW04B Defender is sized correctly for your cellar? Our Wine Cellar Specialists can confirm the right capacity and configuration for your space.
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