Hot Gas Reheat Dehumidification With Sub-cool ReHeat for Packaged Terminal Air Conditioners & Heat Pumps
Dehumid II is a patented* system for the additional dehumidification of air which can be applied to most manufacturer’s packaged air conditioners and heat pumps. The most common application of Dehumid II ® is as an integral part of the thru-wall room air, packaged air conditioner, commercially referred to as a packaged terminal air conditioner (PTAC) or packaged terminal heat pump (PTHP). These units are typically installed in hotels, nursing homes, assisted living and senior and student housing. Dehumid II ® is a true refrigeration cycle, that results in a colder surface temperature indoor air (evaporator) coil. This results in a 25 – 30% increase in moisture removal from the re-circulated indoor room air (up to 3 additional gallons per day) when compared to most major brands of air conditioners and heat pumps.
Hot gas reheat adds heat to this cooler than normal room air that is leaving the air conditioner or heat pump. Most occupants state that the air discharge temperature is the same as a standard air conditioner. This hot gas (refrigerant) reheat coil with sub-cool reheat is a permanent component of the sealed refrigeration system, and has no moving parts or electrical components, eliminating the need for any special maintenance.
The air being discharged into the room by this process is much drier, creating a more comfortable room condition and mold and mildew problems are prevented.
Most of the PTAC units manufactured today are designed to operate in all climate conditions found in the USA and most parts of the world. This "COMPROMISED DESIGN" results in the same model being operated in Phoenix, San Francisco, New York and Chicago, as in humid, muggy Tampa, Miami and New Orleans. Dehumid II ®, when applied to Carrier or other manufacturer’s units, provides the necessary dehumidification for the hot, humid areas of the world.
