What's more, Shah Engineering's DVRF is designed to suit Indian conditions. The system is designed to operate at ambient temperatures even as high as 50°C, so the Shah Engineering Digital VRF will cool even in the hottest parts of the country during the harshest summer months when most other AC systems would have stopped operating. To ensure that your AC investment works for you through high voltage fluctuations, the Shah Engineering Digital VRF is designed to operate efficiently, reliably and smoothly across a wider voltage range of 340V to 460V, a unique and extremely useful specification amongst Indian AC systems.