Mumbai · Maharashtra

Fresh Air Ventilation in Mumbai

Tropical coastal — hot & extremely humid

InAir Fresh Air Ventilation in Mumbai
Summer temp
35–38°C
Humidity
85–95% RH (monsoon)
AQI range
80–160
Filter grade
HEPA-13

What makes ventilation difficult in Mumbai?

Mumbai's monsoon brings outdoor humidity above 90% RH for 4+ continuous months. A standard ERV transfers this moisture indoors — without active dehumidification, indoor humidity stays high despite ventilation. Salt-laden coastal air adds to the filtration challenge.

Which machine is right for Mumbai?

RHP Series + HEPA-13

The RHP's R410A cooling coil actively strips moisture from every cubic metre of incoming outdoor air — delivering dry, conditioned fresh air at 22–28°C regardless of outdoor humidity. This eliminates the condensation and mould risk that affects Mumbai homes during monsoon. HEPA-13 captures coastal particulates and construction dust.

For Mumbai we specify RHP Heat Pump ERV as the default, with HEPA-13 filtration. Models: INA-RHP Ceiling or Floor-Standing models. Model-by-model airflow, static pressure and power figures are on the spec sheets.

Typically installed in: Apartments · Villas · Premium offices · Schools · Hospitals.
Also worth considering: Revita ERV + HEPA-13 filter box with standalone dehumidifier (budget option)

How is a system sized here?

Sizing is driven by occupancy, not floor area — CO2 comes from people, so a small crowded flat needs more air than a large empty one. ASHRAE 62.1 sets the airflow per person; that number picks the unit. Mumbai then adds two local constraints: a summer peak of 35–38°C, which decides how much heat recovery is worth paying for, and humidity of 85–95% RH (monsoon), which decides whether plain recovery is enough or whether active dehumidification is needed.

Get a free Mumbai site survey Compare all 15 cities

Further reading

Mumbai questions

What do people in Mumbai ask?

Mumbai sees an AQI range of roughly 80–160 through the year. Mumbai's monsoon brings outdoor humidity above 90% RH for 4+ continuous months. A standard ERV transfers this moisture indoors — without active dehumidification, indoor humidity stays high despite ventilation. Salt-laden coastal air adds to the filtration challenge. That range is what sets the filter grade: we specify HEPA-13 here.
RHP Series + HEPA-13. We recommend the RHP heat-pump energy recovery unit for Mumbai. The RHP's R410A cooling coil actively strips moisture from every cubic metre of incoming outdoor air — delivering dry, conditioned fresh air at 22–28°C regardless of outdoor humidity. This eliminates the condensation and mould risk that affects Mumbai homes during monsoon. HEPA-13 captures coastal particulates and construction dust.
HEPA-13. Filter grade follows the local AQI rather than a national default — MERV-13 handles ordinary urban particulate, while HEPA-13 is warranted where AQI regularly passes 200 or where dust and industrial sources are present. In Mumbai the range is 80–160.
Yes. InAir supplies and installs across India from its Hyderabad base, and Mumbai in Maharashtra is covered end to end — free site survey, duct design, supply, commissioning with measured airflow readings, and handover. A typical residential installation is commissioned ten to twelve days after order. Send a floor plan to sales@in-air.in and an engineer returns a sized proposal.
Sizing starts from occupancy rather than floor area, because CO₂ is produced by people. ASHRAE 62.1 gives the airflow per person; that figure sets the unit, and the Mumbai summer peak of 35–38°C plus humidity of 85–95% RH (monsoon) decides whether plain heat recovery is enough or whether active dehumidification is required.