Replacement Pool Dehumidifiers for Hotels

Useful life of hotels’ old technology pool dehumidifiers are ending!

Thousands of hotels with indoor pools built over the last 30+ years have reached the stage of retrofitting or replacing their pool dehumidifiers that have reached the end of their life cycle. Many systems fell short of their operating lifespan due to poor pool chemistry; systems not designed or sized properly, poorly installed, lack of negative pressure, or poorly designed air delivery/duct systems. Many pool systems are no longer energy efficient and operating costs are high. For any hotel manager, it is an extremely challenging process to cut operating and energy costs with indoor pools. However, today’s technology in hotel pool dehumidifiers offers significant energy costs reduction, and many offer a wide range of improvement options over what was available even 5-10 years ago.

When retrofitting your hotel, there are several significant areas to review to ensure that your new pool dehumidifier will provide all of the updated “GREEN” technology, energy recovery, and benefits that support a longer life span and a healthy, stable pool room environment.

It’s not enough to simply pull out your existing pool dehumidifier and put the same system back into the natatorium. Before your purchasing decisions to ‘simply replace what’s in place’ are made, you will want to start with your pool room data. Do not necessarily rely on the pool dehumidifier in place, (although we would like to determine your existing tonnage and CFM), as equipment may be oversized or undersized, may lack the necessary air turnovers, which was very common years ago. It was also very common years ago to size a system that was not accurately based on the air and pool water temperatures hotel facilities actually maintain.

Let’s go back to the drawing board and start from scratch. When replacing a system, owners will review their existing pool system tonnage and cfm to size the next pool dehumidifier. This is a good place to start, however each client should take a few additional measures to ensure the sizing, air flow and evaporation rates are met with the new system. The following data is recommended:


Square feet of the total pool room space?

Square feet of the pool and/or spa?

Other water features within the space

Ceiling height of the room (average)

a. Is there a drop ceiling in your room?

Temperature of water and temperature of air  hk pools maintained?

Humidity levels within the space that you maintain (i.e. 50, 55, 60 %?)

Maximum number of occupants?

Hours of operation?

What Chemistry do you use? [ ] chlorine [ ] bromine [ ] salt [ ] other


(1) THE FUTURE FOR ALL POOL DEHUMIDIFIERS is to reduce size, refrigerant and maintenance costs!

Today’s technology is much more advanced (called Secondary Coolant Technology). The future is in refrigerant reduction first and foremost due to the expense and environmental damages caused by hyydrochlorofluorocarbons (HCFC) refrigerants, such as R-22, and other refrigerants. All manufacturers are aware that this will be a continually changing arena and as such should be or are engineering pool dehumidification systems to comply with the more “green”/Leed requirements, which will utilize a fluid/dry cooler for the cooling side of the equation. This technology is not new to the industry; KMART has used Secondary Coolant Technology for over 30 years in their buildings. Several pool dehumidification manufacturers have been using this liquid cooled technology for over 20 years. Other companies are now beginning to understand the importance of reduction in the refrigerants used in today pool dehumidifiers.


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