Energy-efficient HVAC in buildings relies on four technologies: Inverter compressors, lower-impact refrigerants such as R32, VRV variable refrigerant volume systems and energy recovery ventilation. Properly integrated and centrally controlled, they reduce consumption, improve indoor air quality and allow the whole building to be managed from a single platform, as a recent case in corporate offices in Panama shows.
This content is part of our specialized construction magazine, within the editorial line dedicated to sustainability applied to the construction industry.
The content is based on information from Daikin and a success story delivered together with contractor Airmax Group.
You can also read the version published in the November 2025 issue of Construcción en Panamá magazine (in Spanish).
Key technologies in modern HVAC
Inverter technology
It automatically adjusts compressor speed to maintain temperature without consumption peaks. According to Daikin, it achieves savings of up to 30% compared with conventional systems, extends equipment life and avoids temperature swings.
R32 refrigerant
It has a Global Warming Potential (GWP) 68% lower than R410A, is more efficient and easier to recycle and handle.
VRV systems
Variable refrigerant volume (VRV) systems precisely meet the thermal loads of each zone and integrate well into corporate, residential and commercial buildings.
Energy recovery ventilation
It renews indoor air while recovering up to 80% of the energy in the exhaust air, improving air quality without sacrificing efficiency. Indoor air quality is now a health standard in hospitals, offices, schools and homes.
Smart control
Apps and platforms make it possible to schedule equipment, monitor consumption in real time and set routines by schedule or occupancy. Some models learn usage patterns and adjust themselves.
Success story: modernizing an office building in Panama
In a corporate building under renovation, Airmax Group —which had handled its maintenance for years— modernized the HVAC on two full floors.
The challenge
Maximize energy savings without sacrificing comfort or reliability, fitting into existing spaces for units and condensers, in a building that operated with cooling towers.
The solution
Water-cooled VRV systems and water source heat pumps (WSHP), integrated with the existing towers:
- 157 indoor units including fan coils, cassettes and VRV mini splits.
- 35 water-cooled condensing units.
- 4 WSHP units for continuously operating areas.
- Integration of the cooling tower controls with the complex’s central system through Daikin iTouch Manager.
The biggest challenge was integrating with the central control system, solved with direct technical support from the manufacturer.
Results
The client especially values being able to control all HVAC centrally. The solution lays the groundwork for a progressive reduction in energy and maintenance costs.
HVAC and building design
Efficiency does not depend only on equipment. A well-designed envelope reduces the thermal load from the start, as architect Melissa Martínez explains in the building skin, and systems integration is the basis of smart buildings.
Frequently asked questions
What is a VRV system?
An HVAC system that varies the volume of refrigerant sent to each indoor unit according to each zone’s demand.
What is a water-cooled system?
One whose condensers reject heat through a water loop, usually connected to cooling towers.
How much does an Inverter unit save?
According to Daikin, up to 30% compared with a conventional unit, depending on use.
