Astberg HEPA fresh-air and energy-recovery systems — supplied and installed by Shambhavi Enterprises across Purvanchal, Bihar, Lucknow, Varanasi and Prayagraj.
We bring a particle counter to your home, take the PM2.5 reading, run the system, and show you the reading again. No obligation — or just call 93364 01008.
Positive-pressure units that pull outdoor air through five filter stages — including activated carbon for gases and smell — and push it into the house. The simplest whole-house upgrade.
These bring filtered air in and stale air out at the same time through H13 HEPA, carbon and dust filters, recovering most of the heating or cooling energy so your AC load barely changes.
Already have ducting? Drop one of these in line to add primary, HEPA and activated-carbon filtration — rated by Astberg for PM2.5 and formaldehyde — without replacing anything.
Outdoor air across north India gets worse every winter, and it does not stay outside — it comes in through every window gap and door. Indoor PM2.5 in an ordinary home tracks the outdoor reading closely.
Children take the worst of it. They breathe faster than adults relative to their size, so they draw in more polluted air per hour, and their lungs are still developing while they do it.
A whole-house system pushes filtered outdoor air in through HEPA for particles and activated carbon for gases and smell, holds the house at slight positive pressure so dirty air stops leaking in, and keeps the whole home fresh — not one room at a time.
Sizing is one full air change per hour at a 10 ft ceiling. A 450 CMH unit covers roughly a 1,200–1,600 sq ft home — a typical 3 BHK flat. Long duct runs, higher ceilings or a leaky house all pull that number down.
| Unit airflow | Suits a home of | Typical |
|---|---|---|
| 200 CMH | 550 – 700 sq ft | 1 BHK / single floor |
| 350 CMH | 950 – 1,250 sq ft | 2 BHK flat |
| 450 CMH | 1,200 – 1,600 sq ft | 3 BHK flat |
| 500 CMH | 1,350 – 1,800 sq ft | Large 3 BHK |
| 750 CMH | 2,000 – 2,700 sq ft | Duplex / small villa |
| 800 CMH | 2,150 – 2,850 sq ft | Villa |
| 1000 CMH | 2,700 – 3,550 sq ft | Large villa / clinic |
Guide figures only. We confirm the right unit on a site visit.
Winter smog is mostly particles: PM2.5, dust and soot. The ERVs use an H13 HEPA (99.95% at the hardest particle size); the AFV fresh-air units use an H11 rated at up to 95%. Both make a large, measurable difference to an indoor PM2.5 reading.
HEPA does nothing for gases, which is why almost every unit here carries an activated carbon stage as well. Astberg rate it to absorb formaldehyde, benzene, radon and other harmful chemicals, and the filter boxes are rated for PM2.5 and formaldehyde together.
The AFV units add a metal pre-screen for insects and pollen, a 90% pre-filter for mould and spores, and a negative ion stage that Astberg say latches onto dust, bacteria, pollen, smoke and other allergens. The ERVs also control humidity, which is what stops mould and mildew forming.
The AFP350R is the one exception — Astberg list it with dust and HEPA filtration only, no carbon stage, so it is the wrong pick if smell or fumes are your main problem. No unit in this range carries a CO&sub2; or PM2.5 sensor. Carbon saturates over time and must be replaced on schedule to keep working.
Filter stages, performance claims and listed prices as published by Astberg Ventilation. Coverage figures are our own sizing guide at one air change per hour with a 10 ft ceiling, confirmed on site before you order.