Why Chimney Suction Power Reduces and How to Fix It

Loss of suction is the most common kitchen chimney complaint. When suction reduces, smoke spreads, grease settles, and cooking comfort drops.

This article explains why chimney suction reduces and proven solutions.

Ideal Chimney Suction Power

Small kitchen: 800–1000 m³/hr
Medium kitchen: 1000–1200 m³/hr
Large kitchen: 1200+ m³/hr

Top Reasons for Reduced Suction Power

1. Dirty Filters

Grease blocks airflow.
Fix: Clean or replace filters regularly.

2. Blocked Duct Pipe

Oil solidifies inside duct.

Fix: Professional duct cleaning.

3. Incorrect Installation

Too many bends reduce airflow.

Fix: Use straight duct with minimal curves.

4. Weak or Aging Motor

Motor efficiency drops over time.

Fix: Motor repair or replacement.

5. Wrong Chimney Size

Small chimney for large kitchen.

Fix: Upgrade to higher suction model.

How to Improve Chimney Suction Power

Clean filters every 15 days
Use correct speed level
Keep kitchen windows slightly open
Service chimney every 6 months

When Suction Cannot Be Fixed

Burnt motor
Severe duct damage
Old chimney (10+ years)

In such cases, replacement is more economical.

FAQs – Chimney Suction Issues

Yes, with cleaning and proper servicing.

Yes, ideal height is 24–30 inches above stove.

Conclusion

Reduced chimney suction is usually maintenance-related, not manufacturing-related. Timely cleaning and correct installation restore performance and extend lifespan.

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