Boiler Upgrades, Heat Recovery and Certificate Assessment

A boiler project should begin with the useful heat the site needs, not an assumption that the existing boiler should be replaced like for like. Northmore Gordon assesses steam and hot-water systems, controls, heat recovery, fuel use, operating constraints, electrification options and current certificate pathways.

Define the required heat duty

Record the temperature, pressure, flow, schedule, seasonal profile, production dependency and reliability requirement for each major heat user. Compare that demand with fuel data, boiler loading, cycling, blowdown, stack conditions, distribution losses and maintenance history. A Type 3 energy audit can provide a focused, measurement-based investigation when a major boiler decision is approaching.

Right-sizing matters. An oversized boiler may cycle or operate inefficiently at part load, while an undersized system may constrain production or resilience.

Compare more than replacement

• combustion tuning, oxygen trim and control improvements;
• blowdown optimisation, insulation and maintenance;
• economisers and process or flue-gas heat recovery;
• burner replacement or staged boiler plant;
• high-efficiency boiler replacement;
• heat pumps or other electrification where temperature and electrical constraints permit;
• renewable heat or biomass where fuel supply, emissions and operations support it; and
• process changes that reduce the required heat duty.

Evaluate options against the same operating requirement, analysis period and energy-price assumptions. If two measures affect the same heat load, model their combined sequence to avoid double-counting.

Check current certificate rules before commitment

In Victoria, eligible heating projects may be assessed under the Victorian Energy Upgrades scheme. In New South Wales, the Energy Savings Scheme rule discontinued listed gas-fired steam boilers, water heaters, hot-water boilers and space heaters from the PIAM&V and Metered Baseline pathways for implementations from 1 July 2026. This does not determine every heating project in every scheme, but it means old boiler case studies and rebate tables cannot establish current NSW eligibility.

Request the governing activity, rule version, implementation-date test, method, calculation, evidence responsibilities, certificate quantity, price date, fees and customer contribution in writing. Show the project both with and without unconfirmed certificate support. See the government schemes guide for current pathway context.

Plan measurement before installation

A baseline should represent normal pre-project operation and account for variables such as production, weather, occupancy and operating hours. A practical M&V plan defines the purpose, equipment and meter boundary, baseline period, instruments, intervals, quality checks, implementation record and reporting method.

Keep the engineering estimate, verified energy result and issued certificate quantity separate. Two fuel bills alone may not isolate the effect of the boiler project.

Build the investment case

Line	What to include
Capital	Equipment, enabling electrical or fuel infrastructure, installation, shutdown and commissioning
Energy	Fuel and electricity changes, tariff assumptions, operating period and estimate method
Operations	Maintenance, reliability, water, chemicals, labour and production effects
Certificates or grants	Current eligibility, quantity, price, fees, timing and approval status
Emissions	Boundary, factors and whether the result is forecast or verified

Preserve dated records for feasibility approval, final investment decision, purchase commitment, installation and commissioning. If work has started, use the real chronology to assess whether any pathway remains available.

Related resources include renewable heat, waste heat recovery and the AJ Bush boiler case study.

Contact Northmore Gordon before procurement with the heat duty, equipment details, fuel history, project timing and available measurements.