The mixed-air AHU is the default Indian commercial HVAC architecture. In Chennai’s warm-humid climate, it is also the worst-fit architecture for guestroom comfort, IAQ, and energy efficiency. This cas
A 1995-built corporate headquarters in central Delhi ran ductable splits on every floor for three decades. By 2024 the indoor units were unobtainable for spare parts, refrigerant R-22 had crossed BEE
Indian commercial envelope retrofits are dominated by HVAC replacement because envelope work is disruptive. But envelope is where the *building load* is — and a façade retrofit on a glass-heavy IT cam
A constant-primary / variable-secondary (CP/VS) chilled-water plant was the Indian commercial default for two decades. ECBC 2017 + ASHRAE 90.1 now reward variable-primary flow (VPF) heavily — and the
This is the kind of project that does not show up in mepwork.com’s catalogue: a real BPO floor in Mumbai with documented humidity creep complaints, a measured psychrometric mismatch, a brownfield retr
A 15-year-old chiller plant has three failure modes: catastrophic (compressor failure, immediate replacement), gradual (efficiency degradation, retrofit window), or complete obsolescence (refrigerant
ASHRAE 241-2023 dropped in mid-2023 with one main metric: **Equivalent Clean Airflow per occupant (ECAi)**, measured in L/s per person. The standard establishes infection-risk-mitigation airflow targe
