Wine Guardian D088 Ducted Wine Cooling Unit
Wine Guardian D088 Ducted Wine Cooling Unit - Base Model is backordered and will ship as soon as it is back in stock.
Wine Guardian D088 Ducted Wine Cooling Unit
Cooling Unit Options: Base Model
Wine Guardian D088 Ducted Wine Cooling Unit
Wine Guardian D088 Ducted Wine Cooling Unit - Base Model is backordered and will ship as soon as it is back in stock.
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Wine Guardian Sentinel Series
Wine Guardian D088 Ducted Wine Cellar Cooling System
The Wine Guardian D088 Sentinel Series is a fully ducted, self-contained wine cellar cooling system designed for wine cellars between approximately 850 and 4,500 cubic feet. With published cooling capacity up to 10,700 BTU/h, the D088 provides concealed climate control while keeping the main mechanical equipment outside the finished wine cellar.
Unlike through-the-wall cooling units, the D088 distributes conditioned air through insulated supply and return ductwork. This allows the cooling unit to be installed in a mechanical room, utility area, basement equipment space, adjacent storage room, or dedicated HVAC area while only discreet air grilles remain visible inside the wine room.
The supplied product information positions the D088 for luxury residential wine rooms, restaurant wine displays, wine bars, hospitality environments, commercial wine-storage rooms, and glass wine-wall installations where stable climate control, quiet operation, and hidden equipment are important.
Wine Guardian D088: Quick Decision Summary
Choose the D088 when a medium-to-large wine cellar requires a self-contained ducted cooling system with the equipment located outside the finished wine room. It is especially well suited to custom cellars where aesthetics, low interior noise, and even conditioned-air distribution are priorities.
| Best For |
Medium-to-large residential wine cellars, luxury wine rooms, restaurant wine displays, hospitality venues, commercial wine-storage rooms, and glass wine walls. |
|---|---|
| System Type |
Fully ducted, self-contained wine cellar cooling system. |
| Recommended Cellar Size |
Approximately 850–4,500 cubic feet according to the supplied product information. Final selection should be based on a heat-load calculation. |
| Installation Location |
Outside the wine cellar in a suitable mechanical or equipment space. |
| Primary Advantage |
Concealed equipment, ducted airflow, and lower mechanical noise inside the wine cellar. |
Things to Know Before Ordering
- The D088 is a fully ducted self-contained system.
- The unit installs outside the finished wine cellar.
- Supply and return ductwork are required.
- The supplied minimum duct size is 10 inches.
- Published evaporator free-blow airflow is 435–485 CFM.
- Published evaporator airflow is 370 CFM at 0.20 in. WC static pressure.
- The supplied content identifies 208–230V / 1 Phase / 60 Hz electrical service.
- Temperature accuracy is listed at ±1°F.
- Humidity accuracy is listed at ±10% RH.
- An optional water-cooled condenser configuration is available.
- Optional electric heating and integrated humidification are available.
- A heat-load calculation should be completed before purchase.
For smaller wine cellars, compare the D025 Wine Cellar Cooling System or the D050 model. For larger or higher-demand environments, review the D200 Ducted Wine Cellar Cooling System.
Key Features of the Wine Guardian D088
Fully Ducted Hidden Installation
The D088 distributes conditioned air through insulated supply and return ducts while the cooling cabinet remains outside the wine cellar.
This configuration helps preserve the finished appearance of custom wine rooms and keeps the main mechanical equipment out of sight.
Designed for Medium-to-Large Wine Cellars
With published total cooling capacity up to 10,700 BTU/h, the D088 is positioned between the smaller D050 and the higher-capacity D200 in the Sentinel Series.
Quiet Cellar Operation
Locating the self-contained unit outside the conditioned wine room helps reduce mechanical noise inside the cellar.
Precise Digital Temperature Control
The supplied specifications identify digital electronic temperature control with temperature accuracy of approximately ±1°F.
Optional Humidity Control
An integrated humidifier option is available for installations requiring active humidity management.
The supplied content references typical wine-storage conditions of approximately 55%–65% RH.
Flexible Equipment Placement
The supplied content identifies several possible locations for remote equipment installation:
- Mechanical rooms
- Utility closets
- Basement equipment areas
- Adjacent storage rooms
- Dedicated HVAC spaces
Optional Water-Cooled Condenser
A water-cooled configuration is listed for projects where conventional air-cooled heat rejection is limited or where an appropriate circulating-water system is available.
Optional Electric Heating
The supplied specifications identify optional electric heating capacity between approximately 1,635 and 2,000 watts.
Durable Sentinel Series Construction
The cabinet uses an aluminum chassis, UL-rated composite panels, and a gray epoxy powder-coated finish.
Who Is the Wine Guardian D088 Best For?
Medium-to-Large Residential Wine Cellars
The D088 is appropriate for larger residential projects where lower-capacity ducted systems do not meet the calculated cooling load.
Luxury Wine Rooms
Custom residential cellars can use the D088 when concealed mechanical equipment and quiet operation are design priorities.
Restaurant Wine Displays
Restaurant wine-storage and display spaces can benefit from remotely located equipment and ducted air distribution.
Wine Bars and Hospitality Venues
Hospitality installations can use the D088 where consistent environmental control and reduced visible equipment are important.
Commercial Wine Storage Rooms
Commercial storage spaces can use the D088 when the calculated cooling load fits within the system's published performance range.
Glass Wine Wall Installations
The D088 can be considered for larger glass-heavy wine rooms where the actual heat load requires more capacity than smaller ducted systems.
When the D088 Is Not the Right Choice
- Do not select the D088 for a small cellar when a lower-capacity system is sufficient.
- Do not size it using cubic footage alone.
- Do not use it where 10-inch minimum ductwork cannot be accommodated.
- Do not install it in an equipment space that cannot handle condenser heat.
- Do not ignore static pressure and airflow losses in long or restrictive duct runs.
- Choose the D200 when the calculated load exceeds D088 capacity.
D088 Compared With Other Wine Guardian Sentinel Series Models
| Model | General Position | When to Consider It |
|---|---|---|
| D025 | Smaller capacity | Use when the calculated load is well below D088 requirements |
| D050 | Mid-size alternative | Use for smaller medium-size wine-cellar loads |
| D088 | Medium-to-large capacity | Use when the calculated load requires up to 10,700 BTU/h published capacity |
| D200 | Higher-capacity model | Use when the project exceeds D088 capacity |
Avoid Both Undersizing and Oversizing
The supplied content notes that an undersized system may fail to maintain the required conditions, while an oversized unit can short cycle and contribute to unstable humidity. Final model selection should be based on the actual heat load.
How the Wine Guardian D088 Ducted System Works
1. Warm Cellar Air Returns Through Ductwork
Warm air from the wine cellar travels through the return duct to the remotely installed D088.
2. The Self-Contained Unit Conditions the Air
The refrigeration system removes heat from the air and helps control moisture before the air is returned to the cellar.
3. Conditioned Air Returns Through the Supply Duct
Cooled air is distributed back into the wine room through the supply-air system.
4. Air Circulates Throughout the Wine Cellar
Properly designed supply and return placement helps maintain consistent temperature throughout the space.
5. Condenser Heat Is Rejected at the Equipment Location
Because the D088 is self-contained, the mechanical space must be able to handle the heat generated by the condenser.
Why Airflow Matters
The supplied content states that capacity may decrease by approximately 3% for each 10% reduction in evaporator airflow. Correct duct sizing and static-pressure management are therefore important.

Cooling Performance and Cellar Sizing
The supplied product information positions the D088 for wine cellars between approximately 850 and 4,500 cubic feet. This range is only preliminary guidance because actual cooling requirements depend on construction and heat load.
Published Cooling Performance
| Condenser Inlet Temperature | Total Cooling Capacity | Sensible Cooling Capacity |
|---|---|---|
| 60°F | 10,700 BTU/h | 7,120 BTU/h |
| 70°F | 9,900 BTU/h | 6,800 BTU/h |
| 80°F | 9,420 BTU/h | 6,610 BTU/h |
| 90°F | 8,600 BTU/h | 6,120 BTU/h |
The supplied performance ratings are based on approximately 57°F cellar temperature and 55% relative humidity.
Capacity Decreases as Condenser Temperature Increases
The table shows that total cooling output falls as condenser inlet temperature rises. The equipment location therefore affects available performance.
Heat Load Matters More Than Room Volume Alone
The supplied page identifies several important sizing factors:
- Insulation quality
- Vapor-barrier installation
- Glass walls and doors
- Lighting heat load
- Ambient temperature
- Number of bottles stored
- Duct length
- Airflow resistance
Sizing Recommendation
Complete a professional heat-load calculation before ordering. Do not assume that every 4,500-cubic-foot cellar is automatically suitable for the D088.

Airflow and Ducting Requirements
Evaporator Airflow
| Fan Motor | 175–195 W |
|---|---|
| Free-Blow Airflow | 435–485 CFM |
| Airflow at Static Pressure | 370 CFM @ 0.20 in. WC |
| Temperature Control | Digital electronic |
Condenser Airflow
| Fan Motor | 175–195 W |
|---|---|
| Rated Airflow | 435–485 CFM |
| Airflow at Pressure Loss | 370–440 CFM |
Minimum Duct Size
The supplied specifications identify a minimum duct size of 10 inches.
Airflow Performance Warning
The supplied content states that available cooling capacity may decline approximately 3% for every 10% reduction in evaporator airflow. Avoid undersized ducts, excessive bends, restrictive grilles, and unnecessary static pressure.
Installation Requirements and Planning Considerations
Install the Unit Outside the Wine Cellar
The D088 is designed for remote installation outside the wine-storage environment.
Provide Supply and Return Ductwork
Properly sized supply and return ducts are required to move conditioned air between the D088 and the wine cellar.
Provide a Suitable Mechanical Location
The supplied page identifies mechanical rooms, utility closets, basement equipment areas, adjacent storage spaces, and dedicated HVAC areas as possible installation locations.
Manage Condenser Heat
Because the D088 is self-contained, the equipment space must be able to manage the condenser heat produced during operation.
Provide Condensate Drainage
The supplied specifications identify a 0.50-inch drain connection.
Provide Correct Electrical Service
The supplied content identifies 208–230V / 1 Phase / 60 Hz electrical requirements for the system.
Build the Cellar Correctly
Proper insulation and vapor-barrier installation are essential for controlling heat and moisture transfer.
Professional Installation Required
The supplied page states that installation should be completed by a qualified HVAC technician. Do not finalize equipment selection until duct design, electrical service, drainage, equipment-room conditions, and the heat-load calculation have been confirmed.

Wine Guardian D088 Technical Specifications
System Overview
| Brand | Wine Guardian |
|---|---|
| Model | D088 |
| Series | Sentinel Series |
| Cooling Type | Fully Ducted Self-Contained System |
| Recommended Cellar Size | Approximately 850–4,500 cubic feet |
| Maximum Published Cooling Capacity | 10,700 BTU/h |
| Refrigerant | R134A |
| Electrical | 208–230V / 1 Phase / 60 Hz |
| Temperature Accuracy | ±1°F |
| Humidity Accuracy | ±10% RH |
| Installation Type | Remote ducted installation |
Electrical Requirements
| Cooling Current | 8.8–9.8 A |
|---|---|
| Heating Current | Approximately 9 A |
| Minimum Circuit Amps | Approximately 11.7 A |
Physical Specifications
| Width | 41.5 in. |
|---|---|
| Depth | 22.4 in. |
| Height | 18.85 in. |
| Weight | 125 lb |
Cabinet Construction
| Chassis | Aluminum |
|---|---|
| Panels | UL-rated composite panels |
| Finish | Gray epoxy powder coat |
Installation Requirements
| Minimum Duct Size | 10 inches |
|---|---|
| Drain Connection | 0.50 inches |
| Agency Approval | UL 1995 / CSA C22.2 / ETL |
Optional Water-Cooled Condenser, Heating, and Humidification
Optional Water-Cooled Condenser
| Water Usage | 1.20 GPM |
|---|---|
| Pressure Drop | 0.08 PSI |
| Pipe Connection | 0.50 in. O.D. |
The optional water-cooled configuration can be considered where conventional air-cooled heat rejection is limited and a compatible water system is available.
Electric Heating Option
| Heating Type | Electric |
|---|---|
| Heating Capacity | 1,635–2,000 W |
| BTUH Equivalent | 5,582–6,800 BTU/h |
Optional Integrated Humidifier
The supplied content identifies a removable drip-pad humidifier with integral fan.
| Water Temperature | Published Output |
|---|---|
| 60°F | 0.42 lb/hr |
| 90°F | 0.97 lb/hr |
| 100°F | 1.11 lb/hr |
Accessory Selection
Choose the water-cooled option, electric heat, and humidification only when they match the actual project requirements. Do not assume these accessories are included with the standard D088 configuration.
What's Included
- D088 ducted cooling unit
- Digital controller
- Supply and return duct collars
- Condensate drain outlet
- Installation manual
Optional accessories and upgrades are available separately.
Wine Guardian Ducted Cooling System Videos
Brochures, Manuals, Specifications, Warranty, and CAD Drawings
Frequently Asked Questions
What size wine cellar is the Wine Guardian D088 designed for?
The supplied product information positions the D088 for approximately 850–4,500 cubic feet. Do not select it by cubic footage alone; complete a professional heat-load calculation first.
What is the maximum cooling capacity of the D088?
The supplied performance table lists up to 10,700 BTU/h at a 60°F condenser inlet temperature.
Does the D088 require ductwork?
Yes. The D088 is a fully ducted system, and the supplied specifications identify a 10-inch minimum duct size.
Where should the D088 be installed?
The supplied content identifies mechanical rooms, utility closets, basement equipment areas, adjacent storage rooms, and dedicated HVAC spaces as possible installation locations.
How much airflow does the D088 provide?
The supplied evaporator specifications list 435–485 CFM free-blow airflow and 370 CFM at 0.20 in. WC static pressure.
Can the D088 use a water-cooled condenser?
Yes. The supplied specifications list an optional water-cooled condenser using 1.20 GPM with a 0.08 PSI pressure drop and a 0.50-inch O.D. connection.
Can the D088 provide heating?
Yes. The supplied content lists optional electric heating between approximately 1,635 and 2,000 watts.
Can the D088 provide humidity control?
An optional removable drip-pad humidifier with integral fan is listed. Do not assume active humidification is included with the standard unit.
When should I choose the D200 instead of the D088?
Choose the D200 when the calculated heat load exceeds D088 capacity. Avoid moving to the larger system solely because the cellar volume approaches the upper end of the D088 range.
Why is a heat-load calculation important for the D088?
Glass area, insulation, vapor barrier, lighting, ambient conditions, duct length, airflow resistance, and other factors can materially change the actual cooling requirement.
Use the D088 for Medium-to-Large Cellars That Need Hidden Ducted Cooling
The D088 is best suited to projects where the cooling unit can be located outside the cellar and the room requires more capacity than smaller Sentinel Series models while remaining below D200-level demand.
Verify current manufacturer specifications, duct requirements, equipment-room conditions, electrical service, optional condenser configuration, accessory compatibility, installation instructions, and warranty documentation before ordering. Final system sizing should be based on a project-specific heat-load calculation.

