Wine Guardian TTW04B Defender Through-The-Wall Wine Cellar Cooling Unit
Exterior-rated through-the-wall unit for small to mid-sized wine rooms: 3,760 BTU/h at 75°F, 120 V plug-in, electric heater built in
- All three TTW04B trims share the same nominal 3,760 BTU/h capacity at 75°F.
- The Defender adds the Exterior Wall Package, an electric heater and the Ultra Quiet Package on top of the Sentinel's integrated temperature and humidity controller.
- An exterior-rated grille and a coated condenser coil allow installation through an exterior wall.
- A 120 V outlet for the standard Type B plug
- Wine Guardian rates the TTW04B Defender at 56.9 dBA measured at 6 ft, the quietest of the three TTW04B trims.
Wine Guardian TTW04B Defender Through-The-Wall Wine Cellar Cooling Unit is backordered and will ship as soon as it is back in stock.
- Authorized Wine Guardian dealer
- 25 month parts warranty
- 30-day returns, unopened
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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.
Wine Guardian TTW04B Defender: The Exterior-Rated Through-the-Wall Wine Cellar Cooling Unit at the Top of the Line
The Wine Guardian TTW04B Defender is a self-contained, ductless through-the-wall wine cellar cooling unit rated at a nominal 3,760 BTU/h at 75°F, the largest capacity Wine Guardian builds in the Through-the-Wall platform. It is the top trim of that platform: everything the TTW04B Sentinel carries, plus the Exterior Wall Package, an electric heater and the Ultra Quiet Package that brings it to 56.9 dBA at 6 ft.
It is chosen when a wine room sits at the top of what a through-the-wall unit can do and the buyer still does not want a ducted or split system in the house. The Exterior Wall Package is the reason: Wine Guardian pairs an exterior-rated grille with a coated condenser coil so the unit can be installed through an exterior wall, and on its Through-the-Wall line page Wine Guardian rates the Defender series to hold cellar conditions in ambient temperatures from 0°F to 125°F. That is the configuration for a cellar that has to exhaust into a garage, an attic, a utility space or the outdoors instead of into conditioned living space. Compare it against the rest of the through-the-wall wine cellar cooling units before you commit.
Wine Guardian Dealer is an authorized Wine Guardian dealer. Wine Guardian manufactures the TTW04B Defender and handles warranty, registration and service; we sell it and help you confirm capacity and configuration before you buy.
See the TTW04B Defender in Action
Watch How It Works
A short walkthrough of the Through-the-Wall platform from Wine Guardian, the manufacturer of the TTW04B Defender.
- Through-the-wall installation between studs, no ductwork
- Exterior Wall Package, electric heater and Ultra Quiet Package
- Integrated temperature and humidity controller with fail-safe protection
Questions about fit? Call our specialists at (800) 260-1712.
Is the TTW04B Defender Right for You
The TTW04B Defender covers cellars up to about 2,000 cubic feet. Wine Guardian sizes the Through-the-Wall B series by heat load rather than by a published cubic-foot rating, so this figure is calculated with Wine Guardian's own cooling calculator at a documented baseline: an 8-foot ceiling, no glass, R-13 walls and floor, R-29 ceiling, a 75°F warmest wall, 80°F air to the condenser and a 55°F cellar. Your own room will differ from that baseline, which is why the number narrows the shortlist rather than settling it.
✓ Ideal For
A wine room at the top of what a through-the-wall unit can handle, where the buyer wants to avoid ductwork or a split system. Rooms that exhaust into a garage, attic, utility space or straight outdoors, where the air around the condenser is not conditioned and can swing hot or cold. Cellars that need humidity support as well as cooling, and rooms next to living space where the quietest of the three TTW04B trims is worth paying for. For the garage case in particular, how wine storage in a garage is built and cooled covers the ambient swings and insulation work that space demands.
× Consider Another Model If
Your unit will exhaust into conditioned interior space and you do not need the exterior rating, the heater or the Ultra Quiet Package: the TTW04B Sentinel and TTW04B Classic carry the same 3,760 BTU/h capacity for less. Your room is smaller than this capacity class, in which case step down to the TTW02B Defender. Your heat load is larger than a through-the-wall unit can carry, or the wall you have will not take a 33.8 in chassis, in which case a ducted or split system is the better configuration.
TTW04B Defender Key Features
| Feature | What it means for your cellar |
|---|---|
| Largest capacity in the Through-the-Wall line | A nominal 3,760 BTU/h at 75°F on 120 V, the top of the Wine Guardian Through-the-Wall platform, so you can stay ductless at a room size that often pushes buyers toward a ducted system. |
| Exterior Wall Package | An exterior-rated grille and a coated condenser coil allow installation through an exterior wall. Wine Guardian rates the Defender series to maintain cellar conditions in ambient temperatures from 0°F to 125°F on its Through-the-Wall line page. |
| Electric heater | A Defender-only heating option that warms cellar air when the room drops below the set point, which matters when the unit sits on an exterior wall or in an unheated part of the house. |
| Ultra Quiet Package | A Defender-only package that Wine Guardian describes as additional sound reduction material for extra quiet operation. The TTW04B Defender is rated at 56.9 dBA at 6 ft, the quietest of the three TTW04B trims. |
| Integrated temperature and humidity controller | A combined thermostat and humidistat with Bluetooth and NFC control, and the connection point for a Wine Guardian freestanding humidifier when the room runs dry. |
| Condensate re-evaporation | Wine Guardian's re-evaporation system prevents condensate buildup and leakage without a drain line connection. Wine Guardian notes a drain connection may still be required if the unit exhausts to an unconditioned space or the installed area has an inadequate vapor barrier. |
| Precise temperature control | Wine Guardian states the Through-the-Wall line consistently achieves temperatures from 42°F to 75°F, minimizing the fluctuations that harm a collection. |
| Energy efficiency | Wine Guardian's Through-the-Wall brochure states: "Optimized for maximum energy efficiency, the TTW can save you hundreds in electricity costs (50-70% of your unit's cost, on average, over its lifetime)." Wine Guardian's footnote bases that estimate specifically on the TTW04B Sentinel at typical US electrical rates, compared with competitive units of similar capacities, so it is not a figure Wine Guardian calculated for the Defender, which adds an electric heater. |
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.
How Quiet Is the TTW04B Defender
Wine Guardian rates the TTW04B Defender at 56.9 dBA measured at 6 ft, the quietest of the three TTW04B trims and the result of the Defender-only Ultra Quiet Package. Here it is against everyday sounds.
TTW04B Defender Exterior Wall Installation
The TTW04B Defender installs through a wall between standard studs, and with the Exterior Wall Package that wall can be an exterior one. A wall sleeve or the included mounting bracket carries the unit, which slides through the opening. The Defender chassis is 33.8 in deep, the deepest of the three TTW04B trims, so the opening and the framing behind it need checking before anything is ordered. A step-by-step walkthrough of a through-the-wall cooling unit installation covers the framing and sleeving that opening needs, whichever wall it goes through.
TTW04B Defender Specifications
Compatible Add-Ons
Wall Sleeve and Hardware
Remote Interface Controller
Exhaust Duct Collar
Wine Cellar Humidifier
The humidifier is the accessory that turns the Defender's humidistat into actual humidity control, since the cooling unit senses moisture but does not add it. Browse all parts and accessories, or explore related ducted and ductless split systems.
How the TTW04B Defender Compares
All three TTW04B trims share the same nominal 3,760 BTU/h capacity, so this is a choice about conditions and noise, not about how much cellar the unit can hold.
| Decision factor | TTW04B Classic | TTW04B Sentinel | TTW04B Defender |
|---|---|---|---|
| Sound at 6 ft | 59.3 dBA | 57.9 dBA | 56.9 dBA, with the Ultra Quiet Package |
| Climate control | Temperature only | Temperature and humidity sensing | Temperature and humidity sensing, plus an electric heater |
| Ambient conditions | Standard interior installation | Standard interior installation | 0°F to 125°F with the Exterior Wall Package |
| Price tier | Entry | Mid | Top of the line |
- Choose the TTW04B Defender if the unit exhausts into a garage, attic, utility room or the outdoors, or sits close enough to living space that the last two decibels matter.
- Choose the TTW04B Sentinel for a unit exhausting into conditioned interior space with no heating requirement: it gives you the same cooling and humidity sensing.
- Choose the TTW04B Classic for a temperature-only room.
Browse the full range of through-the-wall wine cellar cooling units, weigh it against the other cooling units for cellars of 1,200 to 2,200 cubic feet, or see every wine cellar cooling unit we carry.
TTW04B Defender Questions
Does the TTW04B Defender need a drain line if it exhausts into a garage or another unconditioned space?
Possibly, yes. Wine Guardian's re-evaporation system is designed to prevent condensate buildup and leakage without a drain line, but Wine Guardian states that a drain connection may be required if the unit exhausts to an unconditioned space or the installed area has an inadequate vapor barrier, so have a licensed HVAC professional confirm drainage for your installation.
Will the TTW04B Defender get loud when it works hard on a hot day?
Wine Guardian rates the TTW04B Defender at 56.9 dBA measured at 6 ft, the quietest of the three TTW04B trims. The Defender adds the Ultra Quiet Package, which Wine Guardian describes as additional sound reduction material for extra quiet operation.
Can I size the TTW04B Defender from my room dimensions alone?
No. Glass, lighting, insulation, door seals, exterior walls and the temperature of the space the unit exhausts into all change the heat load, so two rooms of the same size can need different units. Confirm final sizing with Wine Guardian's cooling calculator and a licensed HVAC professional before you buy.
What size wall opening does the TTW04B Defender need?
The TTW04B Defender chassis measures 33.8 by 14.1 by 15.75 in, the deepest of the three TTW04B trims because of the Exterior Wall Package and heater. Take the rough opening and framing dimensions from Wine Guardian's installation and operation manual rather than from the chassis figures, and confirm them with your contractor before framing.
What does the TTW04B Defender add over the TTW04B Sentinel and Classic?
All three TTW04B trims share the same nominal 3,760 BTU/h capacity at 75°F. The Defender adds the Exterior Wall Package, an electric heater and the Ultra Quiet Package on top of the Sentinel's integrated temperature and humidity controller.
How cold can the TTW04B Defender hold a cellar, and how hot can the air around it get?
Wine Guardian states that its Through-the-Wall line consistently achieves cellar temperatures from 42°F to 75°F. On its Through-the-Wall line page Wine Guardian rates the Defender series to maintain cellar conditions in ambient temperatures from 0°F to 125°F, which is what the Exterior Wall Package is for.
Does the TTW04B Defender control humidity?
Indirectly, yes. The TTW04B Defender carries an integrated temperature and humidity controller with a humidistat, which allows a Wine Guardian freestanding humidifier to be connected; the cooling unit senses humidity but does not add moisture on its own.
Need Help Confirming the Right Wine Guardian Model?
Not sure whether the TTW04B Defender is sized correctly for your cellar, or whether you need the exterior rating at all? Our Wine Cellar Specialists can help you narrow the selection before you buy.
Why this model
TTW04B Defender Through-The-Wall key features
-
3,760 BTU/h of cooling
Rated at 75°F condenser air; 3,400 BTU/h at 90°F.
-
Rated for an exterior wall
Exterior grille and coated condenser coil, for 0°F to 125°F ambient.
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1,000 W electric heater
Warms cellar air when the temperature drops below the set point.
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56.9 dBA at 6 ft
Sound attenuation grilles come standard; the quietest TTW04B trim.
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Humidity sensor built in
Reads temperature and humidity and connects a Wine Guardian freestanding humidifier.
-
No drain line as shipped
Condensate is re-evaporated inside the unit; the drain tube comes plugged.
Not sure the Wine Guardian TTW04B Defender Through-The-Wall Wine Cellar Cooling Unit is the right size? Enter your room size, insulation and glass to see your cellar's cooling load in BTU/h.
Open the Wine Guardian cooling calculatorSee it in action
See the TTW04B Defender Through-The-Wall in action
Wine Guardian TTW Features and Benefits
Wine Guardian Through-the-Wall Installation Guide
Wine Guardian Through-the-Wall Installation, previous generation
Parts for a working install are ordered separately.
See the complete systemComplete system
Complete the TTW04B Defender Through-The-Wall system
Sold separately. Tick what you need — it goes into the cart with the unit.
- 3,760 BTU/h at 75°F
- 120 V plug-in
SKU: WGTTW04BE1LCD2A0BHF
After you buy
Warranty, returns and help
Wine Guardian warranty: 25 months parts
Warranty service is handled directly by Wine Guardian. We help you find your model, serial number and purchase documents. Standard: 25 months parts and 13 months labor from the original invoice date. Platinum (optional upgrade): 25 months parts and labor, plus the compressor, evaporator coil and condenser coil covered for 61 months (parts only).
Ask us for a free copy of the warranty before you buy.
Free cancellation for 24 hours
Cancel free within 24 hours of placing your order, custom and made-to-order items included: your card is not charged. After 24 hours and before the order ships, a standard order can still be cancelled for 3%, the card-processing fee the payment processor keeps on a refunded payment. Custom and made-to-order items go into production after 24 hours and cannot be cancelled.
30-day returns, unopened
Return an unopened, uninstalled item within 30 days of delivery for a refund or store credit. Contact us first: ship nothing back until we send you an RMA number with the return instructions. A 25% restocking fee applies to returns and exchanges; there is no fee when an item arrives damaged, is defective or the wrong item was sent.
Questions? 1 (800) 260-1712Monday to Friday, 9AM to 9PM EST
Frequently asked questions
TTW04B Defender Through-The-Wall questions
Does the TTW04B Defender need a drain line if it exhausts into a garage or another unconditioned space?
Possibly, yes. Wine Guardian's re-evaporation system is designed to prevent condensate buildup and leakage without a drain line, but Wine Guardian states that a drain connection may be required if the unit exhausts to an unconditioned space or the installed area has an inadequate vapor barrier, so have a licensed HVAC professional confirm drainage for your installation.
Will the TTW04B Defender get loud when it works hard on a hot day?
Wine Guardian rates the TTW04B Defender at 56.9 dBA measured at 6 ft, the quietest of the three TTW04B trims. The Defender adds the Ultra Quiet Package, which Wine Guardian describes as additional sound reduction material for extra quiet operation.
Can I size the TTW04B Defender from my room dimensions alone?
No. Glass, lighting, insulation, door seals, exterior walls and the temperature of the space the unit exhausts into all change the heat load, so two rooms of the same size can need different units. Confirm final sizing with Wine Guardian's cooling calculator and a licensed HVAC professional before you buy.
What size wall opening does the TTW04B Defender need?
The TTW04B Defender chassis measures 33.8 by 14.1 by 15.75 in, the deepest of the three TTW04B trims because of the Exterior Wall Package and heater. Take the rough opening and framing dimensions from Wine Guardian's installation and operation manual rather than from the chassis figures, and confirm them with your contractor before framing.
What does the TTW04B Defender add over the TTW04B Sentinel and Classic?
All three TTW04B trims share the same nominal 3,760 BTU/h capacity at 75°F. The Defender adds the Exterior Wall Package, an electric heater and the Ultra Quiet Package on top of the Sentinel's integrated temperature and humidity controller.
How cold can the TTW04B Defender hold a cellar, and how hot can the air around it get?
Wine Guardian states that its Through-the-Wall line consistently achieves cellar temperatures from 42°F to 75°F. On its Through-the-Wall line page Wine Guardian rates the Defender series to maintain cellar conditions in ambient temperatures from 0°F to 125°F, which is what the Exterior Wall Package is for.
Does the TTW04B Defender control humidity?
Indirectly, yes. The TTW04B Defender carries an integrated temperature and humidity controller with a humidistat, which allows a Wine Guardian freestanding humidifier to be connected; the cooling unit senses humidity but does not add moisture on its own.
Find the Right System for Your Cellar
Compare the range or talk to us about sizing. Final sizing, electrical and installation should be confirmed with the manufacturer's documentation and a licensed HVAC professional.
