Find the savings hiding in your bill

Energy efficiency auditing is a discipline that rewards rigour. A surface-level walk-through that produces a list of lighting upgrades does not constitute an audit; it constitutes a sales exercise. Lumen & Wire conducts structured energy audits under the methodology of AS/NZS 3598.1 for commercial buildings and AS/NZS 3598.2 for industrial facilities, providing a quantitative baseline of energy consumption by end-use, a costed upgrade register ranked by payback period, and a measurement and verification framework that enables genuine post-upgrade performance confirmation.

Our audits are led by electrical engineers with direct experience in building services, industrial process loads, and the interplay between HVAC, lighting, power factor, and supply infrastructure. We use revenue-grade sub-metering, data logging, and power quality instrumentation to capture load profiles that reflect real operating patterns rather than nameplate estimates. The result is an energy model grounded in measured data, not assumptions, and an upgrade plan that your finance team can evaluate with confidence.

Sub-Metering, Load Analysis, and Power Quality

Understanding where energy is consumed within a facility is a prerequisite for meaningful improvement. We design and install temporary or permanent sub-metering arrangements using Class 0.5 or Class 1 revenue-grade meters across HVAC plant, lighting circuits, process loads, and common area services. Where data loggers are deployed for interval metering, we analyse the resulting load profiles to identify baseload waste, peak demand drivers, poor load factor on major plant, and power quality issues including low power factor and harmonic distortion that increase apparent energy costs beyond what the kilowatt-hour meter reveals.

• AS/NZS 3598.1 (commercial) and AS/NZS 3598.2 (industrial) structured audit methodology
• Temporary and permanent sub-metering installation with interval data logging across key end-uses
• Power quality analysis covering power factor, harmonic distortion, voltage unbalance, and demand peaks
• Lighting audit with maintained illuminance measurements and NCC Section J benchmarking
• HVAC electrical audit including VSD performance, motor efficiency class assessment, and controls integration review
• Costed upgrade register ranked by simple payback and net present value, with indicative carbon abatement

Ranked Upgrade Plans and Measurement and Verification

Every upgrade recommendation we produce is supported by a calculation methodology that is transparent and repeatable. We specify the assumed baseline consumption, the projected saving, the uncertainty range, and the basis for each figure. For large upgrades, we design a measurement and verification plan aligned to the IPMVP Option A, B, or C methodology so that actual savings can be confirmed against the committed figure, supporting green lease obligations, NABERS ratings, and commercial finance structures where energy performance is a condition of drawdown.

Common upgrade pathways we assess include LED luminaire retrofits with DALI dimming and occupancy control, VSD retrofits to constant-speed pump and fan motors, power-factor correction to reduce kVA demand charges, building envelope electrical loads, and replacement of aged distribution infrastructure with high-efficiency transformers and switchgear. We do not offer a standard upgrade package: every recommendation is site-specific and backed by measured data from that facility.