India's Most Trusted Air Handling Unit & Ventilation System Sourcing Network

What is ASHRAE 62.1 and is it mandatory for Indian buildings?

A: ASHRAE 62.1 is the ventilation standard for acceptable indoor air quality; NBC 2016 Part 8 references ASHRAE 62.1 for commercial buildings — it is effectively mandatory for all IGBC/LEED green buildings and NABH hospitals.

What is the difference between an AHU and a FCU?

A: An AHU (Air Handling Unit) serves multiple zones through ductwork and typically handles fresh air; an FCU (Fan Coil Unit) serves a single room or zone using chilled water coil — both are components of central HVAC systems.

What HEPA filter grade is required for hospital AHUs in India?

A: NABH and ASHRAE 170 require HEPA H13 (99.95% efficiency at 0.3 micron) for operating theatres and ICUs; H14 (99.995%) is specified for pharmaceutical sterile manufacturing cleanrooms.

What is an Energy Recovery Ventilator and how much energy does it save?

A: An ERV uses a heat exchanger to pre-cool incoming fresh air using exhaust air energy — recovering 60–80% of the ventilation energy that would otherwise be wasted; critical for achieving IGBC/LEED energy targets.

What is the typical AHU static pressure for a multi-storey office in India?

A: Standard office AHU systems operate at 0.75–1.5 inches WG (187–375 Pa); complex systems with long duct runs, HEPA filters or high-rise distribution may require 2–3 inches WG (500–750 Pa).