DRI Introduces Advanced Fresh Air Solutions for Large Buildings

14 Oct 2025 CW Team

DRI has unveiled its latest solutions for indoor air quality (IAQ) and energy-efficient ventilation in large enclosed buildings: the Treated Fresh Air Handling Units (TFA) and Dedicated Outdoor Air Systems (DOAS).

The TFA units integrate EcoFresh Molecular Sieve Coated Heat Wheels to deliver optimal IAQ while promoting energy savings. The modular design allows additional functions such as cooling, heating, humidification, high-efficiency filtration, mixing, and sound attenuation. Maintenance is minimal, with standard filters and fan assemblies designed for reliability and ease of service. TFA units, AHRI certified and engineered with low-pressure-drop components, are suitable for hospitals, hotels, malls, offices, airports, educational institutions, pharma facilities, cold storages, and all air-conditioned spaces. By preconditioning incoming fresh air year-round, the system can reduce system capacity by 30–65% while maintaining optimal humidity levels and controlling energy costs.

DRI’s DOAS ULTIMA system provides a unitised approach to fresh air management, handling moisture loads effectively with the help of high-recovery Enthalpy Wheels, EcoFresh, and patented Passive Desiccant Wheels. This technology allows low dew point delivery without the need for a DX system or active energy regeneration. By decoupling internal latent loads from sensible loads, DOAS improves IEQ while enabling energy savings of up to 55%. The system is particularly suited for offices, hospitality establishments, hotels, malls, and hospitals.

Together, DRI’s TFA and DOAS solutions represent a comprehensive approach to achieving high IAQ standards and energy efficiency in conditioned spaces."

Infrastructure Transport

05 Feb 2026

MMRDA Installs 325-Tonne Steel Spans on Mumbai Metro Line 4

The Mumbai Metropolitan Region Development Authority (MMRDA) has achieved a key construction milestone on Metro Line 4 with the successful installation of three large steel spans at Bhandup West during overnight operations.The spans, together weighing 325 metric tonnes, were launched using eight heavy-duty cranes and 12 multi-axle vehicles. The operation required precise engineering and meticulous planning to minimise disruption in the densely populated suburban area.Due to effective inter-agency coordination, the work—originally scheduled across four nights—was completed within just two n..

CMRL Targets March 2027 Opening for Vadapalani–Panagal Park

Chennai Metro Rail Limited (CMRL) is progressing as scheduled to open the Vadapalani–Panagal Park section of Phase II’s Corridor 4 by March 2027. The 3.5 km underground stretch is part of the 26.1 km Corridor 4 connecting Lighthouse with Poonamallee Bypass.Construction activities are advancing steadily, with tunnelling works between Vadapalani and Panagal Park already completed. Track-laying operations are expected to commence shortly. At Panagal Park station, structural works have reached the concourse and platform levels, while excavation continues at the lowest level.CMRL is also consid..

Maha-Metro Invites Pune Metro Civil Maintenance Bids

Maharashtra Metro Rail Corporation Limited (Maha-Metro) has invited bids for the annual civil maintenance contract of the Pune Metro Rail Project. The tender, bearing ID and number P1-O&M-20/2025, is scheduled to close on 23 February 2026, with a pre-bid meeting slated for 10 February 2026. The earnest money deposit (EMD) for the contract is Rs 3,50,500, and the duration of the contract is one year.The scope of work includes annual civil maintenance of 28 elevated and underground stations, 28.079 km of elevated viaduct including steel bridges, 12.15 km of tunnels, and two depots under the ..