High Desert Property Maintenance: A Cost–Benefit Analysis of Evaporative and Refrigerated Air Conditioning Conversions
Swamp coolers, also known as evaporative coolers, are cheaper when it comes to operating costs. This is mainly because of its simple maintenance requirements. This is the reason why for decades, swamp coolers have been the number one cooling system in high-dessert regions. Using less amount of electricity, swamp coolers can effectively cool indoor air conditioning in dry climates. However, there have been changes when it comes to property maintenance in arid regions. This is due to shifting humidity patterns, increasing tenant expectations when it comes to comfort, and rising temperatures.
In recent research, it was shown that evaporative cooling can still have advantages when it comes to energy-efficiency in hot, dry climates. In a study by Scientific Reports, published this year (2026), it was found that evaporative cooling systems significantly improved thermal comfort in high desert area, while also reducing energy use. However, newer studies also show that when humidity rises, especially during monsoon period or prolonged heatwaves, the performance of evaporative cooling sharply declines.
In order to effectively decide whether to retain or replace swamp coolers, a property manager should consider the following major factors:
Installation cost
Operation expenses
Water consumption
Tenant satisfaction
Swamp coolers are still very cheap, compared to other systems. Compared to central refrigerated HVAC system cost, a standard residential swamp cooler system may be 40 to 60% less. When it comes to maintenance, swamp coolers are also easier to manage. Even a maintenance staff that has no specialized refrigeration certification can replace pads, pumps, and belts. Evaporative systems also have major advantages when it comes to electricity consumption. Instead of energy-intensive compressors, swamp coolers use only fans and water pumps. According to some industry estimates, energy savings are up to 70 to 80% compared to refrigerated air systems in dry climates.
The hidden costs, however, are hard to ignore. The main operational concern right now in many high-dessert municipalities is water usage. During summer peak periods, modern evaporative units can used up substantial amounts of water. This results in long-term utility cost pressures and regulatory concerns. In Southwestern US jurisdictions, the use of evaporative systems in certain new developments are now being restricted because of water scarcity issues.
Expectations by tenants are now also changing. In refrigerated air conditioning, temperature control is precise, regardless of outdoor humidity, while swamp coolers lose its effectiveness when the weather is humid. This difference is remarkable. In a 2025 Washington Post study, it was found that many schools and residential properties in the Southwest are now starting to use refrigerated systems after evaporated coolers failed in extreme heat events.
Full conversion, though, is not always an economically smart strategy. Mixed approaches are now becoming popular in current HVAC research. Studies suggest that combining evaporative pre-cooling with refrigerated backup systems may save a significant amount of energy without compromising comfort reliability. This could help landlords and property managers maintain evaporative cooling during dry conditions while supplementing with refrigerated air during peak humidity or heat emergencies.