What does decommissioning mean for your project?
For an upgrade claimed as replacement of old heating, the provider must follow the applicable activity and evidence requirements. Ask which activity is proposed and what work it requires on your old system. The government’s heating and cooling page is the consumer starting point.
This is not a request for you to carry out any technical work. It is a question to settle the scope: what remains, what is made inoperable, what is removed and who records the evidence?
Different equipment and sites need different arrangements. Avoid relying on a friend’s description of their installation as a complete guide to yours.
Why you should ask before removing anything
A model label, the installed equipment and its location may help establish what was at the property. If the old unit is taken away before assessment, information the provider needs may be harder to verify.
Tell the assessor if another contractor has already removed or disconnected it. Keep any invoices and photographs you already have, but do not assume they will meet every requirement. The provider needs to decide what can be supported.
Never stage a photograph or reinstall equipment to make an upgrade appear eligible. Explain the actual sequence of events and ask what options remain.
Who should disconnect a gas heater?
Arrange appropriately qualified tradespeople for gas and electrical work. The Essential Services Commission’s February 2026 bulletin highlights compliant sealing or capping of gas supply piping when gas products are decommissioned.
Do not loosen fittings, cut cables, remove safety components or attempt to make the appliance inoperable yourself. Ask who will complete each part of the work and which relevant certificates you will receive.
For planning, you only need to provide safe access and information. If you have concerns about the equipment’s condition, tell the contractor before the visit rather than investigating inside the appliance.
Removal, disposal and repairs are separate scope items
A quote can mention decommissioning without explaining how every visible trace of the old system will be handled. Ask about the appliance, redundant ductwork, outlets, flue components and any openings left behind.
Some components may be difficult to access. Have the installer explain the proposed scope at your home, including any limitations, rather than assume everything will disappear as part of a standard fee.
- Who takes away the old appliance?
- Which redundant components are included in removal?
- Who patches and paints affected surfaces?
- Is access equipment needed?
- What evidence and certificates will be retained or supplied?
These questions help align expectations about the finished property. They are not instructions to dismantle anything.
Can the old heater stay as a working backup?
Do not assume it can remain operable if the claimed replacement activity requires decommissioning. Tell the assessor at the start if retaining backup heat is important, and ask how that affects the proposed activity and discount.
Also discuss how the new system will cover the rooms you use. A wish to keep the old heater sometimes reflects a reasonable concern about a replacement design that has not been explained well enough.
Ask the designer to walk through the intended winter setup, including controls and zones. Resolve the comfort question and the eligibility question together, before either becomes an installation-day disagreement.
Does removing the heater disconnect the whole home from gas?
Not necessarily. You may still have gas cooking or hot water. Ask the qualified contractor which appliances remain and discuss account or network disconnection separately with the relevant parties if you are planning to leave gas entirely.
Do not assume a heating replacement quote includes meter removal, account closure or unrelated appliance work. Put your wider plan on the table so the scope can be made explicit.
If you are also considering hot water, our heat pump rebate guide explains the separate checks. A staged plan should make clear which services are still in use after each job.
A clear sequence avoids uncertainty
Keep the accepted quote, any written variations and the handover documents in one folder. If something agreed has not been completed, raise it with the responsible business promptly and refer to the scope rather than a memory of the sales conversation.
Melba Energy is not a VEU accredited provider. Confirm the provider responsible for your proposed discount before work starts. Read our gas replacement planning guide or contact us with your existing heater details.
Sources and review notes
Checked on 10 October 2026. Program rules and certificate values can change. Use the current official guidance and your written quote before committing to an upgrade.
