Fresh Air Ventilation in Nagpur
Hot semi-arid — India's hottest major city, extreme temperature range

What makes ventilation difficult in Nagpur?
Nagpur regularly records India's highest temperatures (46–48°C) with no moderating sea breeze. Its central geographic location experiences maximum solar radiation. Extreme summer heat places maximum stress on any ventilation system.
Which machine is right for Nagpur?
RHP Series (Premium) · Revita ERV + MERV-13 (Standard)
At 48°C outdoor temperature, every degree of ERV heat recovery translates to meaningful AC savings. RHP's active cooling compounds this — delivering 22–28°C fresh air regardless of outdoor temperature. Humidity is moderate, so Revita ERV is viable for cost-conscious residential. RHP strongly recommended for commercial and institutional use where fresh air conditioning quality matters most.
For Nagpur we specify Revita ERV or RHP Heat Pump as the default, with MERV-13 (HEPA-13 for sensitive occupants) filtration. Models: RHP INA-RHP Series (premium), Revita INA-MFQR + MERV-13 (standard). Model-by-model airflow, static pressure and power figures are on the spec sheets.
Typically installed in: All residential and commercial — RHP preferred for commercial scale.
Also worth considering: Standard Revita ERV + good AC system works adequately for budget residential
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. Nagpur then adds two local constraints: a summer peak of 44–48°C, which decides how much heat recovery is worth paying for, and humidity of 20–60% RH, which decides whether plain recovery is enough or whether active dehumidification is needed.