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​Desert Aire understands and solves these problems with specially designed energy efficient dehumidification equipment for supermarkets and large retail stores.

Desert Aire's Q-Pump is a 4-element, non-reversing, water source heat pump that's designed to be used in conjunction with our TotalAire and VerticalAire DOAS units.  One of the Q-Pump's key advantages is to provide major energy savings in the heating mode.  In brief, a store's refrigeration racks initially "deposit" their waste heat of rejection into a water loop via a liquid/fluid condenser.  The Q-Pump then extracts this energy from the water loop to boost the temperature of the refrigerant in the TotalAire DOAS, thus improving the efficiency of its compressors in the heating mode.   Ultimately, the Q-Pump enables the TotalAire DOAS to achieve EERs of 14+ and COPs of 6 or greater.  For a complete explanation and diagrams of a TotalAire Q-Pump integrated into a store's water loop, click the first link below.

​Click Here to View Additional Information and Diagrams of the Q-Pump

​Click Here to Watch a Brief Video about the Q-Pump (Open with IE 9.0 or later)

Desert Aire Supermarkets and Retail

Supermarkets and retail buildings benefit from Desert Aire TotalAir Q-Pump DOAS units via an energy efficient, green method to use the heat of rejection from refrigeration racks to heat the building interior space.

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Desert Aire’s TotalAire™ Series dehumidifiers provide you the most complete solution for your dedicated outdoor air system (DOAS) and high outside air system (HOAS) applications. Our many options allow you to design the highest energy saving solution for your compliance to ASHRAE 62.1 code ventilation requirements for new construction and renovation projects. This system allows the engineer to separate the latent load of the building and deliver conditioned air to the space which will optimize the performance of the buildings convention heating and cooling systems.

All TotalAire™ units are designed around a reliable, efficient dehumidification system. There are two main reasons for using the dehumidifier as a base to build a complete ventilation system: 

  • Significant additional energy costs will result if the latent cooling provided by a standard air handler is used for dehumidification. In contrast, dehumidifiers are the only efficient means to regulate moisture removal.
  • TotalAire™ dehumidifiers are configured for the easy addition of optional components needed for a complete solution, options that offer effective solutions that are not otherwise available.

TotalAire™ units are engineered and manufactured for excellent performance, dependability and serviceability. Specially designed evaporator coils provide maximum moisture removal. Components are carefully selected for reliable long-term operation.

The most energy efficient method to remove moisture is through the use of a dedicated outdoor air system that lowers the dew point temperature of supply air to below 55° F. This also helps remove existing moisture from inside a facility. A DOAS design can also be optimized to remove maximum moisture at the lowest electrical consumption rate (Moisture Removal Efficiency, MRE) at both full and part-load conditions.

If the application requires an air handler to accept outside air volumes of 50% to 100% of the supply air volume, conventional sensible heating and cooling units cannot be used. The system must be designed to remove the outdoor air’s moisture, but also incorporate a specialized sequence of operation to provide the appropriate sensible cooling and heating. A HOAS design can also be optimized to remove maximum moisture at the lowest electrical consumption rate (Moisture Removal Efficiency, MRE) during both full and part-load conditions.

Supermarkets & Retail

Excess humidity in supermarkets can cause condensation and fogging on refrigerated display case doors making it difficult for your customers to view your products. A great deal of energy is used to run anti-sweat heaters to overcome this problem

Condensation also contributes to:

  • The formation of ice on refrigeration coils
  • Hoar frost on frozen food packaging, making products unappealing to your customers

Hot gas defrost cycles:

  • Waste energy because they're often overused to combat these frosting problems
  • Repeated defrosting also exposes products to higher temperatures, shortening their shelf life
  • Furthermore, when case doors are constantly being opened, they also flood aisles with cold air creating an uncomfortable environment for customers.


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