Surat · Gujarat

Fresh Air Ventilation in Surat

Tropical coastal — hot, moderately humid, significant industrial pollution

InAir Fresh Air Ventilation in Surat
Summer temp
38–42°C
Humidity
60–85% RH
AQI range
150–250
Filter grade
HEPA-13 + activated carbon

What makes ventilation difficult in Surat?

Surat is India's diamond and textile hub. Industrial emissions from textile dyeing, chemical processing, and diamond polishing create complex pollution with both PM2.5 and VOC contamination. Coastal humidity compounds the latent load challenge.

Which machine is right for Surat?

RHP Series + HEPA-13 + Activated Carbon

Surat's combination of coastal humidity and industrial VOC requires dual action: RHP for active dehumidification of humid coastal air, HEPA-13 for PM2.5 from industrial and textile sources, and activated carbon for VOC from dyeing and chemical processing. Homes near Sachin GIDC, Pandesara, or Palsana industrial areas should specify activated carbon alongside HEPA-13.

For Surat we specify RHP Heat Pump ERV as the default, with HEPA-13 + activated carbon filtration. Models: RHP INA-RHP Series, INA-GLX HEPA + Carbon filter box. Model-by-model airflow, static pressure and power figures are on the spec sheets.

Typically installed in: Premium apartments · Offices · Healthcare · Schools.
Also worth considering: INA-GLX HEPA + activated carbon filter box as a supplementary upgrade to existing systems

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. Surat then adds two local constraints: a summer peak of 38–42°C, which decides how much heat recovery is worth paying for, and humidity of 60–85% RH, which decides whether plain recovery is enough or whether active dehumidification is needed.

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Further reading

Surat questions

What do people in Surat ask?

Surat sees an AQI range of roughly 150–250 through the year. Surat is India's diamond and textile hub. Industrial emissions from textile dyeing, chemical processing, and diamond polishing create complex pollution with both PM2.5 and VOC contamination. Coastal humidity compounds the latent load challenge. That range is what sets the filter grade: we specify HEPA-13 + activated carbon here.
RHP Series + HEPA-13 + Activated Carbon. We recommend the RHP heat-pump energy recovery unit for Surat. Surat's combination of coastal humidity and industrial VOC requires dual action: RHP for active dehumidification of humid coastal air, HEPA-13 for PM2.5 from industrial and textile sources, and activated carbon for VOC from dyeing and chemical processing. Homes near Sachin GIDC, Pandesara, or Palsana industrial areas should specify activated carbon alongside HEPA-13.
HEPA-13 + activated carbon. 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 Surat the range is 150–250.
Yes. InAir supplies and installs across India from its Hyderabad base, and Surat in Gujarat 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 Surat summer peak of 38–42°C plus humidity of 60–85% RH decides whether plain heat recovery is enough or whether active dehumidification is required.