AirAudit Mathodology

Our Audit Methodology

How a Level B Compressed Air Audit finds the leaks, losses and savings hiding in your system.

Every AirAudit Level B audit follows the same disciplined sequence — from the first questionnaire to the final report in your hands. Here’s exactly what happens at each stage, and why it matters for the accuracy of your savings number.

8

Audit stages

7–10

Days on site / logging

15–27%

Typical savings found

ISO 11011

Audit standard followed

What "Level B" means for your facility

A Level B audit sits between a quick walk-through and a full investment-grade study. It combines a hands-on inspection of your compressor room and distribution network with short-term data logging of pressure, flow and power — enough real measurement to size your losses accurately, without the cost and disruption of a multi-month monitoring programme.

The goal at the end of a Level B audit is simple: a report that tells you exactly where compressed air is being wasted, how much it’s costing you per year, and what it would take — and cost — to fix it.

A Level B Audit Covers

Compressor room performance and efficiency testing
Pressure and flow data logging across key points
Ultrasonic leak detection and quantification
Distribution and piping pressure-drop analysis
Demand-side equipment review
Annual cost-of-waste and savings calculation with payback estimates

Eight Stages, One Continuous Line from Data to Decision

Think of it as a single pipeline: information flows in at the top, gets measured and pressure-tested along the way, and comes out the other end as a clear, costed action plan.

Step 01

Pre-Audit Questionnaire & Document Review

Before anyone visits site, we send a short questionnaire covering your compressors, operating hours, electricity tariff and known problem areas. We review past utility bills, compressor logs and equipment datasheets so the audit team arrives already familiar with your system.

1–2 days, remote

Data intake

6.2 bar baseline

Step 02

Site Walkthrough & System Mapping

Our engineers walk the entire compressed air system — compressor room, dryers, receivers, distribution mains and end-use points — recording pipe sizes, pressures at multiple locations, and how the system is actually operated versus how it's documented. This becomes the baseline map for everything that follows.

Day 1 on site

Step 03

Compressor Room Performance Test

We test each compressor's actual output, power draw and specific energy consumption (kW per 100 CFM) under real operating conditions, and compare it against the manufacturer's rated performance. This shows us whether your compressors are running efficiently — or quietly costing you extra on every cycle.

Day 1–2 on site

kW / 100 CFM

Continuous logging

Step 04

Flow & Pressure Data Logging

We install data loggers on compressor power, system flow and pressure at key points, then leave them running for several days — usually covering a full production cycle including shift changes, weekends and shutdowns. This is where the audit moves from a snapshot to a true picture of how your system behaves over time.

5–7 days, unattended

Step 05

Ultrasonic Leak Detection & Quantification

Using ultrasonic detectors, our team walks the full distribution network — pipework, fittings, valves, hoses and point-of-use connections — tagging every leak found. Each leak is sized in CFM and converted into a rupee-per-year cost, so you know not just where the leaks are, but which ones are worth fixing first.

Day 2–3 on site

Leak rate, CFM

Pressure drop, ΔP

Step 06

Distribution & Demand-Side Review

We trace the pressure drop from the compressor room to the furthest point of use, checking pipe sizing, filter and dryer condition, and how individual machines and tools are using compressed air. Often, simply correcting an oversized pressure drop allows the whole system to run at a lower, cheaper set pressure.

Day 3 on site

Step 07

Energy Balance & Savings Calculation

Back in the office, we combine the logged data, leak survey and compressor test results into a full energy balance for your system — how much air is generated, how much is actually used productively, and how much is wasted. Each finding is converted into kWh, CO₂ and rupee figures using your actual electricity tariff.

3–5 days, off site

kWh / year saved

Payback, months

Step 08

Final Report, ROI & Implementation Roadmap

You receive a full written report ranking every recommendation by savings, cost and payback period — from no-cost fixes like leak repairs and pressure reduction, to larger projects like compressor upgrades. We present the findings in person with your team, and remain available to support implementation and verify results afterwards.

Delivered & presented on site

Ready to see where your compressed air system is losing money?

Get in touch and we’ll talk through how a Level B audit would apply to your plant, your equipment and your energy bill.