Eco-Mantra

Independently verified 33.3% electricity savings across 10 air‑conditioning units with an estimated payback of 7.4‑months return on investment.

Eco-Mantra in Bali, Indonesia undertook a comprehensive retrofit of their air-conditioning systems from R410a to Engas M60 hydrocarbon refrigerant. The trial was independently verified by PT Mantra Bali, who measured electrical power demand using calibrated HIOKI clamp-on power testers with data logging every 5 seconds. The trial across two initial units demonstrated a consistent 33.3% reduction in electrical power demand — from 1.57 kW to 1.07 kW in the Engineering Room, and from 1.62 kW to 1.08 kW in the Panel Room — while maintaining identical cooling performance (less than 3% deviation in supply-return air temperature difference). Based on the trial results, the retrofit was extended to all 10 R410a air-conditioning units across the venue. The combined annual savings totalled over IDR 41 million per year, with an impressive return on investment of just 7.4 months. The project demonstrated that Engas M60 delivers substantial real-world savings under tropical operating conditions without any loss of cooling capacity.

The Challenge

Prior to the conversion, the existing HVAC infrastructure was reliant on man-made chemical refrigerants that were not only environmentally damaging but also inherently inefficient. The high operating pressures caused significant wear and tear on the compressors, leading to increased maintenance costs and frequent downtime.

The Engas Solution

Our engineering team conducted a thorough assessment and recommended a direct drop-in replacement using Engas hydrocarbon blends. The retrofit process was completed seamlessly without the need for extensive hardware replacements. Safety protocols in accordance with AS/NZS 3000, AS/NZS 60079.1.10 & AS/NZS 5149.1-4 were strictly followed throughout the implementation.