EC fans
Garvata EC Fans vs Global EC Fan Brands: What Indian Buyers Should Compare
Every good EC plug fan uses the same core technology, so the differences that matter in India are elsewhere. Here is how to compare suppliers on energy at your duty point, ratings for Indian conditions, monitoring, control and local support, and where Garvata fits.
Garvata Labs · · 6 min read
Key points. At ₹10 per unit, a fan running around the clock costs far more in electricity each year than it does to buy, so efficiency at your duty point matters more than list price. All leading EC plug fans share IE5-equivalent motors and built-in speed control. The real differences for Indian sites are ratings for heat, humidity and voltage, monitoring, the control that turns variable speed into savings, and local support and lead time.
If you are replacing the fans in an air handling unit (AHU) or a CRAH, you will be comparing EC plug fans from several suppliers. The market is led by two German makers, ebm-papst and Ziehl-Abegg, whose fans sit inside many of the AHUs and precision cooling units sold in India. Both have Indian plants, ebm-papst in Chennai and Ziehl-Abegg near Pune, but we found no public evidence that AHU-size EC motors are yet made in India. ebm-papst's third Chennai plant, due to be completed at the end of 2026, is the first announced. Until then, almost every EC fan sold in India, ours included, depends on an imported motor. This guide sets out what to compare, what to ask, and how Garvata's EC fans line up, including where the global brands are stronger.
New to the technology? Start with EC vs AC Fans for AHUs: An Indian Buyer's Guide.
Energy, not purchase price, decides the cost
A fan in a 24x7 AHU, at an IT park, a pharma plant or a data center, runs 8,760 hours a year. At ₹10 per unit, that adds up quickly:
| Fan input power | Energy per year (24x7) | Cost per year at ₹10/unit | Cost over 10 years |
|---|---|---|---|
| 2 kW | 17,520 kWh | ₹1.75 lakh | ₹17.5 lakh |
| 3 kW | 26,280 kWh | ₹2.63 lakh | ₹26.3 lakh |
| 5 kW | 43,800 kWh | ₹4.38 lakh | ₹43.8 lakh |
A fan that draws 5% less power at your duty point saves about ₹13,000 a year per 3 kW fan, or ₹1.3 lakh over ten years. Across 40 fans in an IT park, that is about ₹52 lakh. So the first number to ask any supplier for is input power at your airflow and static pressure, not the price per fan.
What every good EC plug fan has in common
The core technology is shared across the leading suppliers:
- EC (electronically commutated) motors with permanent magnets and integrated electronics. Leading designs are rated IE5-equivalent: benchmarked against the IE5 class for variable-speed motors in IEC TS 60034-30-2. The standard itself excludes motors built into a fan that can't be tested on their own, which is why makers say "equivalent".
- Backward-curved plug impellers that discharge directly into the AHU plenum, with no scroll housing, belts or pulleys.
- 0–100% speed control built in, with no separate VFD.
- Modbus RTU communication over RS485, so speed can be commanded and status read by a BMS or controller.
- Dynamic balancing of the impeller and motor to grade G6.3 under ISO 21940.
ebm-papst's RadiPac tender specification, for example, covers all of these. If a supplier can't offer them, keep looking.
How to compare EC fan suppliers for Indian sites
| What to compare | Why it matters in India | Garvata EC fans |
|---|---|---|
| Power at your duty point | Energy at ₹10/unit outweighs purchase price | Selected for your airflow and static pressure, with power stated at that point |
| Motor efficiency | Losses run 24x7 | IE5-equivalent EC motor |
| Supply voltage range | Three-phase supply varies, especially on long feeders and DG sets | 3~380–480 V, 50/60 Hz |
| Ambient and humidity rating | Rooftop and plant-room AHUs run hot; monsoon humidity is high | −25 to +60 °C, 5–95% RH |
| Ingress protection | Dust and monsoon moisture | IP55 |
| Harmonics | Many drives on one feeder affect power quality | Designed to IEEE 519 limits |
| Control inputs | Works with BMS, controllers or a simple signal | Modbus RTU (RS485), 0–10 V/PWM, 4–20 mA, speed feedback and fault relay |
| Monitoring | Faults found before they become breakdowns | Reports speed, temperature, power draw and vibration |
| Control software | Variable speed saves energy only if something varies it | GarvataAI AHU Control, available now |
| Retrofit fit | Downtime and civil work cost money | Drop-in replacement in standard mounting sizes |
| Support and lead time | A failed fan in a pharma or data center AHU can't wait for a shipment | Engineered and supported in India |
Our current range is built around a 560 mm backward-curved aluminium impeller in 7.5K and 10K configurations. The configuration documents have wiring and mechanical details.
Where the global brands lead
It would be misleading to compare without saying this. The established European makers, ebm-papst and Ziehl-Abegg among them, have decades of field history, very wide size ranges (RadiPac runs from 250 to 1,000 mm impellers), published performance data measured on test rigs to ISO 5801, and growing Indian manufacturing. ebm-papst has been in Chennai since 1996. If your project needs a size or configuration we don't make, we will tell you.
Where Garvata is different
Fans and control from one team. An EC fan only saves energy when something adjusts its speed to what the space actually needs. It is common to find AHUs fitted with EC fans still running at a fixed speed set during commissioning. Garvata builds the fan and the AI control that modulates it, so you get the savings of variable speed as well as the efficiency of the motor.
Rated for Indian conditions. A 60 °C ambient rating, a 380–480 V supply range and IP55 protection are designed for rooftop units in Chennai summers, plant rooms without ventilation and supply that dips and swells.
Monitoring built in. Every fan reports its own speed, temperature, power and vibration. The data feeds the GarvataAI dashboard, so a failing bearing or a clogged filter shows up as a trend, not a breakdown.
Local engineering, and a local motor on the way. Our team in India handles selection, commissioning and support. Today our EC fans use motors imported from Germany, like almost every EC fan sold in India. We are developing our own EC motor, engineered in India and to be built here under contract manufacturing, to reduce cost, lead time and dependence on a few overseas suppliers. It is in development and not yet in production.
Questions to ask any EC fan supplier
- What is the input power at my airflow and static pressure, and how was it measured (ISO 5801 or AMCA 210)?
- What is the maximum ambient temperature at full load, and does output derate above it?
- What supply voltage range does it tolerate without derating?
- Which spares are stocked in India, and what is the lead time for a replacement fan?
- Who commissions it, and who comes when it fails?
- What can it report over Modbus: power, speed, temperature, faults, vibration?
- What will control the fan speed after installation, and who sets it up?
Ask every supplier the same questions and compare the cost over ten years, not the price on the quote.
Garvata EC fans are available now. Send us your AHU schedule and we will propose a selection at your duty points, along with the energy it would use. Talk to us.
Sources
- ebm-papst, Tender specification: EC centrifugal fan modules – RadiPac, fan sizes 250 to 1000 (2026).
- IEC TS 60034-30-2:2016, Rotating electrical machines – Efficiency classes of variable speed AC motors (IE-code).
- Garvata, GarvataAI ECF backward-curved centrifugal EC fan configuration documents, models GFAI.560T5.7.5K and GFAI.560T5.10K (v1.1). garvata.com
- ISO 21940-11, Mechanical vibration – Rotor balancing.
- ebm-papst, "ebm-papst announces its 3rd manufacturing unit in India" (2025). ebmpapst.com
- IEC TS 60034-30-2 preview, scope and exclusions. vde-verlag.de