Frequently Asked Questions

See below for answers to some of our more freqently asked questions.  If your question is not listed, please Contact Us and one of our representatives will get back to you shortly.

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Are exploded view drawings available?

Due to the wide variety of configurations, exploded view drawings are not presently available.

Are your dehumidifiers EnergyStar Rated?

Desert Aire dehumidifiers are not EnergyStar rated since the EnergyStar program does not cover the systems we build. The current EnergyStar program for dehumidifiers is limited to the free standing portable type (non-ducted) with compressor sizes less than 12,000 Btu/hr or less than 2 lb/hr of moisture removal. This program was an offshoot of the AHAM rating program for home appliances. The EnergyStar program has not provided a rating system as of yet for the large systems that require more fan motor horsepower to overcome the static of supply and return air duct work. AHRI has created two standards to rate the moisture removal efficiency of larger dehumidifiers and Dedicated Outdoor Air Systems: AHRI 910 and 920 respectively are available from the ahrinet.org website.

At what relative humidity level should a poolroom be maintained?

It is recommended that the relative humidity be maintained at between 50% and 60% in the poolroom.

At what temperature should a poolroom be maintained?

As a general rule, the temperature should be maintained at about 2° F above the water temperature. It is Desert Aire's recommendation that the air temperature should not be above 86° F.

Can I get replacement parts shipped overnight?

With the exception of compressors, we can generally ship in-stock parts for next day delivery when the order is placed before noon. Expedited freight charges are at the customer's expense.

Can I use an existing Desert Aire R-22 remote condenser with a Desert Aire R-410A replacement dehumidifier?

Using an existing Desert Aire R-22 remote condenser with a Desert Aire replacement R-410A dehumidifier is strictly dependent upon which model of Desert Aire remote condenser you're currently utilizing. If the existing remote condenser cannot be used, a new one must be purchased from Desert Aire. The following is a list of all Desert Aire basic remote outdoor condenser models and indicates whether they're compatible with one of our R-410A systems. Model RC: No. Model ROC: No. Model ROCF: Yes. Model ROCH: Yes. Model ROCQ: Yes. Please note that the R-22 systems use different refrigeration oil than R-410A and therefore all traces of oil and R-22 refrigerant must be removed prior to conversion to R-410A.

Can I use my existing line sets when replacing a dehumidifier that uses R-22 refrigerant with a dehumidification system that uses R-410A refrigerant?
In order to reuse line sets the following must be reviewed: 
1. The diameters of the line set must be adequate for the new appliance.
2. The line set must be Type K or Type L copper in order to withstand the higher pressures of R-410A refrigerant.
3. Brazing materials should be compliant with R-410A. If unknown the line set must be replaced. 
4. The line set must be properly flushed/cleaned of previous refrigerant & oil. 
 
Desert Aire recommends that a Line Set Analysis be completed prior to the appliance installation to determine if the line set can be reused. In most cases new line sets will be required. Please consult Desert Aire Service for any questions
Can the ExpertAire Series dehumidifier introduce outdoor air?

Yes. The ExpertAire Series dehumidifiers are available with an outdoor air intake option.

Do Desert Aire's DOAS solutions meet AHRI 920 and ASHRAE 90.1 energy minimums?

Yes. All of Desert Aire DOAS solutions comply with AHRI's moisture removal efficiency (MRE) requirements and significantly exceed ASHRAE 90.1 2013 minimum energy efficiency ratings.

Do HPR dehumidifiers include a condensate pump?

A condensate pump with a 20 foot length hose is available with all HPR models.

Does the ExpertAire Series meet AHRI 910?

Yes. ExpertAire Series dehumidifiers are compliant with AHRI's moisture removal efficiency (MRE) requirement for indoor pool applications.

How do I buy Desert Aire products?

Desert Aire markets and sells our products through manufacturers representatives. Please find your local representative by using the Find A Rep function in the Contact submenu of this website.

How do I get a price for a Desert Aire unit?

Pricing and assistance is available from your Desert Aire Representative. Please find your local representative by using the Find A Rep function in the Contact submenu of this website.

How do I need to prepare the existing Desert Aire R-22 remote outdoor condenser for use with R-410A?

Using an existing Desert Aire R-22 remote condenser with a Desert Aire replacement R-410A dehumidifier is strictly dependent upon which model of Desert Aire remote condenser you're currently utilizing. If the existing remote condenser cannot be used, a new one must be purchased from Desert Aire. The following is a list of all Desert Aire basic remote outdoor condenser models and indicates whether they're compatible with one of our R-410A systems. Model RC: No. Model ROC: No. Model ROCF: Yes. Model ROCH: Yes. Model ROCQ: Yes. Please note that the R-22 systems use different refrigeration oil than R-410A and therefore all traces of oil and R-22 refrigerant must be removed prior to conversion to R-410A.

How do I order replacement parts?

Call Desert Aire's Service Department at 1-262-946-7400 weekdays between 8:00 am and 5:00 pm Central time.

How do I start a warranty parts claim?

Call Desert Aire's Service Department at 1-262-946-7400 weekdays between 8:00 am and 5:00 pm Central time.

How it the LW Series dehumidifier different from a standard dehumidifier?

Typical dehumidifiers work best in high ambient temperature conditions of between 65 to 95 degrees F (18 to 35 degrees C) and 50 to 80% relative humidity while the LW Series dehumidifiers are designed to operate in low temperature applications of 32 to 70 degrees F (0 to 21 degrees C).

How much does an HPR dehumidifier weigh?

Approximately 150 lbs.

How much moisture can an ExpertAire dehumidifier remove?

ExpertAire Series dehumidifiers are available in a range of sizes designed to remove between 8 lbs/hour and 84 lbs/hour of moisture from the air at ARI standard 82° F / 60% RH. Your Desert Aire Representative is available to assist you with unit selection for your application.

How much moisture can an HPR remove?

HPR models are available to remove between 150 to 240 pints of moisture from the air per day based on 80F / 60% RH conditions.

I cannot find current product information on the Desert Aire dehumidification system I am looking to replace. How can I determine if my Desert Aire system has been discontinued or is still available?

We have incorporated advances in technology and industry standards into our dehumidification systems that have led us to reconfigure and rename system offerings. The best way to meet your application needs is to contact your local Desert Aire manufacturers representative. Please find your local representative by using the Find A Rep function in the Contact submenu of this website.

In what sizes is the LW Series dehumidifier available?

The LW Series dehumidifiers are available in sizes ranging from 3 to 15 nominal tons.

In what temperature conditions can an ExpertAire Series dehumidifier be used?

ExpertAire dehumidifiers are designed to operate in air temperatures between 65° and 95° F (18° to 35° C).

What dehumidification system is best for large indoor pools, aquatic centers and natatoriums?

Desert Aire's SelectAire (SA Series) dehumidification systems are specified for large indoor pools, aquatic centers and natatoriums. SA Series systems are flexible in their design options and can be customized for specific applications. For example, SA Series systems can be installed indoors or outdoors; equipped with or without energy recovery systems; and equipped with or without outdoor air box systems for ventilation air.

What information is needed to size a poolroom dehumidifier?

Desert Aire Representatives are trained to help you select the appropriate dehumidifier for your application. Answers to the following questions are needed at a minimum to properly determine the best Desert Aire solution for your poolroom application: What is the surface area of each pool or whirlpool within the poolroom? What is the square footage of the poolroom? What is the average ceiling height of the poolroom? What is the temperature at which each pool will be maintained? What is the temperature at which the poolroom will be maintained? Is there a separate spectator area as part of a larger space?

What is a dehumidifier?

A refrigerative dehumidifier operates by drawing air over the evaporator coil, which transfers heat energy from the air to the refrigerant within the evaporator. As the heat energy is removed from the air, the moisture in the air condenses and the water drains into the condensate pan and down the drain. The cool, dry air passes through the reheat coil condenser and reabsorbs the heat energy from the hot gas refrigerant. The warm, dry air is discharged into the space. Heat energy can also be transferred to alternate refrigerant condensers to provide space cooling or water heating as specified.

What is a DOAS?

DOAS is a dedicated outdoor air system. DOAS are used to introduce outside air into a space as specified by the mechanical design engineer. In many areas local building codes require that outdoor air be brought into the building to help improve indoor air quality for occupants.

Unfortunately, outdoor air can also introduce moisture into a facility and can create IAQ problems such as mold, mildew and an environment where viruses and other organisms can flourish. The key to preventing mold formation and IAQ problems is to control the humidity level inside the building. While a standard air conditioner is thermostat controlled to provide space cooling, it cannot accurately control the humidity levels. Desert Aire's answers to this problem are our Aura™, VerticalAire™ and TotalAire™ systems, which are designed to introduce 100% outdoor air while precisely controlling space humidity and temperature levels. Please contact your local Desert Aire Representative for help in selecting the Aura™, VerticalAire or TotalAire DOAS system that is best for your application.

What is the lead time on Desert Aire products?

Desert Aire lead times vary by product line. Information on lead times is available from your Desert Aire Representative. Please find your local representative by using the Find A Rep function in the Contact submenu of this website.

What number do I call for Desert Aire Service?

Call Desert Aire's Service Department at 1-262-946-7400 weekdays between 8:00 am and 5:00 pm Central time.

What refrigerant do HPR dehumidifiers use?

R-410A refrigerant

What refrigerant is used in the LW Series dehumidifiers?

R-407C refrigerant

What refrigerants are used in Desert Aire dehumidification systems?

Desert Aire dehumidification systems use either R-410A or R-407C.

When would I specify an LW Series dehumidifier?

The LW units are for low temperature applications ranging from 32 degrees F to 70 degrees F (0 to 21 degrees C).

Where are ExpertAire Series dehumidifiers used?

ExpertAire Series dehumidifiers are used wherever excess humidity is a problem. Common applications include residential and hotel poolrooms, water treatment and wastewater treatment plants, records storage areas, warehouses and manufacturing facilities.

Where are HPR Series dehumidifiers installed?

The HPR dehumidifiers are typically installed in storage areas, basements and other spaces where humidity control is desired.

Where can I get an Installation & Operation Manual?

To download Installation & Operation Manuals, go to the Service & Repair area of this website.

Where can I get help in selecting an appropriate unit for my application?

Desert Aire Representatives are trained to provide application assistance for any application. Please find your local representative by using the Find A Rep function in the Contact submenu of this website.

Where can I get the wiring diagram?

Call Desert Aire's Service Department at 1-262-946-7400 weekdays between 8:00 am and 5:00 pm Central time.

Which Desert Aire dehumidification system should I choose for my poolroom application?

Several Desert Aire dehumidification systems are available for poolroom applications. For help in sizing and choosing the system that is best for your needs, please contact a Desert Aire Representative. To find your local representative, please use the Find A Rep function in the Contact submenu of this website.

Why can't I just use outdoor air to remove moisture from a poolroom?

Using only outdoor air for your poolroom ventilation can be expensive and makes it difficult to control a poolroom's humidity level, and the rate of evaporation from the pool surface. In some areas, outdoor air will often contain more moisture than the air inside the poolroom. Introducing humid outdoor air only increases the moisture content of the air inside the poolroom where it condenses on surfaces that are cooler than the dewpoint temperature. This condensation can lead to deterioration of the furnishings and the building itself while causing odors and promoting mold growth.

Conversely, introducing outdoor air that is too dry into a poolroom can accelerate evaporation of the pool water. In addition to the expense of adding water and water treatment chemicals to the pool, the accelerated evaporation makes swimmers feel chilled when their skin quickly dries upon leaving the water. Desert Aire dehumidification systems provide optimum control of humidity in your poolroom environment to safeguard the comfort and health of building users; protect furnishings and building systems; and conserve energy, water and water treatment resources.

Why do I need a dehumidifier for my poolroom?

Pool water evaporates into poolroom air. This evaporation is moisture that condenses on any surface including windows that is at or below the dewpoint temperature in the poolroom. This condensation can lead to deterioration of the furnishings and the building itself, musty odors and mold growth.

Why doesn't the LW Series dehumidifier have problems with freezing?

To prevent the evaporator coil from freezing in low temperature conditions, the LW Series dehumidifiers are designed with a timer that will initiate the defrost cycle when the suction line temperature drops below 30 degrees F (-1 degree C). During the defrost cycle the blower is disengaged and all of the system's reheat capacity is diverted to the evaporator, where it quickly thaws the coil. Once the suction line temperature increases to confirm the evaporator coil has thawed, the dehumidifier can resume normal operation.

Why should I use an outdoor air box on a poolroom dehumidifier?

Outdoor air is introduced into a dehumidification system after the evaporator coil for several reasons. During the winter cold outdoor air may cause condensation in return air at undesirable places in the system or ductwork. Also, the variability of the outdoor air will influence the design and performance of the evaporator coil. When colder outdoor air mixes with the return air from a poolroom, it lowers the mixed air conditions that flow over the evaporator coil. This lower condition reduces the capacity of the system and creates a variable, unpredictable moisture removal and cooling capacity. To eliminate these issues, Desert Aire’s outdoor air box introduces the outdoor air between the evaporator and hot gas reheat coil.