Ventilation / Fresh Air Calculator
Ventilation / Fresh Air Calculator — quick estimate
Estimate the exhaust / fresh-air airflow your space needs from the recommended air changes per hour (ACH). Adjust the inputs, then get an engineered ventilation design from our team.
Your space
Airflow = room volume × ACH. ACH values follow common Indian practice / NBC for each space type; final fan selection considers ducting, static pressure and code minimums.
Get an engineered ventilation design — free
Our mechanical engineers will size the fans, ducting and make-up air for your space to code. We'll attach the estimate above automatically.
Have a BOQ, drawing or tender for this scope? Send it for an item-wise rate-analysis review →
Your request is in
Thanks! Our HVAC team will send your tailored ventilation design within one business day.
Indicative estimates only — not a binding design. Actual ventilation depends on occupancy, equipment heat, code minimums and duct static pressure.
Got your number — what next?
A calculator gives you a first figure. These take it further.
The work itself
Read before you specify
The terms behind it
Delivered work with this scope
- Electrical & Mechanical for a Global Manufacturer— client withheld
- Bespoke MEP for a Global Semiconductor Leader— NXP Semiconductors
Need an exact BOQ, rate analysis or measurement sheet?
This is a quick engineering estimate. For tendering, billing or audit, our QS & estimation team prepares an item-wise BOQ, rate analysis and a verified measurement sheet to IS / CPWD norms — backed by 15+ years and ISO 9001:2015 quality processes.