What thermostat setting is most energy-efficient for offices?

24°C in summer, 20°C in winter. Every 1°C closer to outdoor temperature reduces HVAC energy use by 6–8%.

How much can occupancy sensors cut HVAC bills?

15–25% in offices, 30%+ in meeting rooms and hotel guest floors — because setback occurs whenever the space is unoccupied for >20 minutes.

Is R32 refrigerant more efficient than R410A?

Yes. R32 has ~10% higher COP and one-third the GWP of R410A. It's the standard for all new commercial installations from 2025.

HVAC energy efficiency guides

Cut kWh, extend equipment life and hit ESG targets — the levers that actually work.

Key facts

HVAC = 40–60% of commercial energy use.
24°C summer setpoint saves 6–8% per °C vs 22°C.
R32 refrigerant is ~10% more efficient than R410A.

HVAC accounts for 40–60% of a commercial building's energy use. The biggest efficiency wins aren't equipment upgrades — they're operational: raise summer setpoints to 24°C, install occupancy sensors, use smart scheduling, and switch to R32 refrigerant on replacement. These guides quantify the impact of each lever.

Guides in efficiency

Common questions about efficiency

What thermostat setting is most energy-efficient for offices?: 24°C in summer, 20°C in winter. Every 1°C closer to outdoor temperature reduces HVAC energy use by 6–8%.
How much can occupancy sensors cut HVAC bills?: 15–25% in offices, 30%+ in meeting rooms and hotel guest floors — because setback occurs whenever the space is unoccupied for >20 minutes.
Is R32 refrigerant more efficient than R410A?: Yes. R32 has ~10% higher COP and one-third the GWP of R410A. It's the standard for all new commercial installations from 2025.