How much do compressed air leaks really cost?

Leaks are a hidden utility

In typical plants 20–30 % of compressed air is lost through leaks in fittings, hoses, drains and tools. Because compressed air is one of the most expensive forms of energy in a factory — around 7–8 kW of electricity per m³/min — leaks quietly consume large amounts of power.

Measure with a no-production test

During a shutdown with all users off, run the compressor and record load and unload times. Leakage percentage is roughly load time divided by total time. For example, 30 seconds loaded out of 120 seconds means 25 % of compressor capacity is leaking.

Multiply leakage flow by specific power and running hours. A 2 m³/min leak at 7 kW per m³/min over 8,000 hours equals about 112,000 kWh a year. Use the Professional Converter to turn that into your local currency at your tariff.

Fix programme

• Tag leaks with an ultrasonic detector during quiet periods
• Repair the largest leaks first — quick-release couplings and hoses are usual suspects
• Replace timer drains with zero-loss drains
• Reduce system pressure where possible; leaks fall with pressure
• Repeat the survey every quarter