Replacing an open fireplace with a wood heater can change how a living room is heated, but the existing opening is only one part of the installation. The chimney, flue route, hearth, nearby combustible materials and condition of the surrounding structure all need assessment. A heater that fits the visible opening is not automatically suitable for the fireplace behind it.
For an Australian renovation, begin with a qualified installer’s site inspection and confirmation of the relevant property approvals. Choose the appliance after the feasible installation options are understood. That sequence makes it easier to preserve the room’s character while avoiding a purchase that requires unplanned masonry work or an unsuitable flue arrangement.
Decide what the replacement needs to achieve
Describe the heating problem in ordinary terms. Perhaps the room is uncomfortable despite an open fire, cold air moves through the house, or maintaining the old fireplace has become inconvenient. State which rooms you want to heat and when. A heater intended for occasional evening use has a different brief from one expected to warm a large living area for long periods.
Australian Government Your Home guidance describes open fireplaces as an inefficient heating method and identifies slow-combustion heaters as more efficient. It also recommends choosing heating for the home and climate. Treat this as a reason to assess the whole room, rather than assuming the largest appliance will give the best result.
Review insulation, draughts and the way rooms connect as part of the decision. These are relevant to a wider sustainable renovation plan. Improving the building can change the heating requirement, so make those planned upgrades known to the supplier before selecting a model.
Include smoke and everyday workload in the decision
NSW Health explains that wood-heater smoke affects indoor and surrounding air quality and recommends considering less-polluting heating alternatives. Compare a wood heater with a suitable electric heating option before committing, particularly where nearby homes are close or household members are sensitive to smoke. A new appliance does not remove all pollution concerns.
Make the comparison practical
Consider fuel delivery, dry storage, carrying wood indoors, cleaning and servicing alongside appearance and purchase price. If those routines do not suit the household, retaining the fireplace as a decorative feature while heating electrically may deserve serious consideration. The right renovation should suit how the home is actually lived in.
Inspect the fireplace before ordering a heater
Ask the installer to inspect and measure the existing opening, hearth and chimney arrangement. The inspection should identify what can be retained, what needs further investigation and what must change for the shortlisted appliances. Request a written description of the findings, particularly where parts of the chimney cannot yet be inspected.
Old fireplaces may have been altered repeatedly. Decorative panels can conceal earlier openings, and a neat room-side finish does not establish the condition of masonry or adjacent construction. Avoid pulling out components or widening the opening yourself. The builder should determine whether proposed alterations affect structural support.
If the property has heritage controls, establish which features are significant before agreeing to removal. Original tiles, a mantel or the external chimney may need a different approach from later additions. Coordinate the appliance installation with any fireplace surround restoration so each part of the work supports the other.
Ask how old debris, soot and suspect building materials will be assessed and managed. Where the age or construction raises concerns, arrange appropriate investigation before disturbance. Do not treat a fireplace conversion as an exemption from normal renovation checks for concealed hazards.
Compare inbuilt and freestanding arrangements
An inbuilt heater can retain a compact relationship with the existing fireplace, subject to the model and opening being suitable. A freestanding unit may create a different visual focus and occupy more room-side space. Neither choice should be made from a photograph alone; the complete installation determines how it works in the room.
Have the supplier draw the proposed appliance in plan and elevation, showing its position relative to the mantel, hearth and adjacent walls. Include access for loading fuel, opening the appliance door and maintenance. For a freestanding arrangement, mark the actual occupied floor area rather than just the metal body’s footprint.
Ask what fan assistance, electrical connection or service access is required for each option. If a fan is included, understand its normal operating noise and how it is maintained. If an electrical connection is needed, have a licensed electrician assess and price it before finishes are completed.
Nectre’s Australian product information includes different heater configurations and model-specific dimensions, and directs readers to current installation documentation. Use the exact shortlisted model’s information when assessing fit. Similar external dimensions do not establish identical clearance, hearth or flue requirements.
Have the flue route designed for the appliance
The chimney’s existing presence does not prove that it can simply accept a replacement appliance without further work. Ask the installer to specify the complete flue system, its route and its relationship with the existing chimney. Any retained component should be explicitly identified and accepted as suitable for the proposed installation.
Nectre’s installation guidance refers to AS/NZS 2918 and the instructions supplied with the selected flue system. Your installer should identify the requirements applicable to the particular appliance and property. Do not apply a single internet clearance or height figure to every roof, chimney or heater arrangement.
Request a clear account of any work above the roof, including access equipment, weatherproofing and responsibility for making good. A heater quotation can look inexpensive when those items are left to someone else. Confirm whether the installation price includes them or whether the builder and roof trade need separate allowances.
Ask about the parts you will not see
- Which chimney and flue components are retained, replaced or newly installed?
- What inspections are required before concealed work is accepted?
- How will roof penetrations and disturbed finishes be made weatherproof?
- What access will future inspection and cleaning require?
- Who coordinates any masonry repairs or structural assessment?
- Which installation records and compliance documents will be supplied?
Keep the answers with the quotation. If later inspection changes the required work, have the revised scope and price documented before proceeding, using the same discipline as other renovation contract variations.
Specify the hearth as more than a finish
The hearth is part of the appliance installation, not simply a tile choice. Ask the installer to establish the required floor protection for the selected heater, including its dimensions and construction. An existing decorative hearth may be retained only if it is assessed as suitable for the new arrangement.
Discuss the visible edge, finished level and transition to the surrounding floor after the technical requirements are resolved. A raised edge can affect the route through the room, while an extended hearth may displace furniture. Mark the proposed outline on the floor and test ordinary movement around it.
If new stone, tile or another facing is proposed, have the installer and builder agree on the complete assembly. The surface material’s appearance does not establish the performance of what lies beneath it. Include support, joints, edges and any associated floor repairs in the specification.
Keep a sample of the chosen finish beside the existing mantel and flooring before ordering. Small visual decisions can be tested cheaply at this stage. They become more expensive to change once the appliance and its surrounding construction are installed.
Check combustible materials and the room layout
Ask the installer to identify the required separation from combustible materials for the actual appliance and flue configuration. Include mantels, adjacent joinery, curtains, wall construction and any proposed shielding in that assessment. A surface that looks like masonry may be a thin finish over a different backing.
Do not assume that adding a tile panel or metal sheet permits furniture or timberwork to move closer. Have any protective arrangement specified and accepted by the installer under the relevant product instructions and requirements. Keep these decisions on the drawings so later decorative work does not unintentionally alter the approved arrangement.
Walk through the room with the heater door shown open and the usual furniture in place. Think about children, pets, visitors and someone carrying fuel. Ask the supplier about suitable guarding where needed, and make sure storage baskets and seasonal decorations remain outside the required clear areas.
If a television is proposed above the fireplace, obtain advice from both appliance suppliers and the installer about the intended arrangement. Avoid relying on photographs of other homes as evidence that temperatures and clearances will be suitable. A different location may also be more comfortable for everyday viewing.
Resolve approvals and responsibilities
Check state or territory requirements and local council controls before installation. The answer can depend on the appliance, the building work, heritage status and local air-quality provisions. Ask who will obtain approvals and which documents must be available before work starts. A supplier’s general statement should not replace advice about your specific property.
For a controlled heritage property, the assessment may include the external chimney as well as the internal fireplace. Seek the relevant heritage renovation approval advice early enough to influence the selection. In strata property, establish the permissions needed for common property and shared building elements.
Nominate one person to coordinate the installer, builder, electrician and any roof or masonry trade. Record who is responsible for each inspection, opening, repair and finishing task. This is especially useful when the appliance retailer arranges only part of the work.
Compare complete installation budgets in AUD
The following figures are a hypothetical budgeting example, not a current Australian price survey or a quote for a particular model. They assume an assessed existing fireplace, manageable access, a selected appliance and limited surrounding repairs. All amounts include GST.
- Selected wood heater allowance: AUD $3,500.
- Flue components and installation allowance: AUD $2,300.
- Hearth work and surrounding repairs: AUD $1,400.
- Inspection, cleaning and preparation allowance: AUD $600.
- Electrical connection and final making good: AUD $500.
The illustrative base cost is AUD $8,300. Adding a reserve of AUD $1,700 gives a planning allocation of AUD $10,000 including GST. Major chimney reconstruction, structural alterations, scaffolding, substantial roof repairs, hazardous-material work and approval fees are excluded. Each should be separately priced if relevant to the actual property.
When comparing the installation quotes, look for differences in appliance model, flue scope, hearth construction and access assumptions. A shorter quotation may be missing work rather than offering it more efficiently. Ask each contractor to confirm exclusions in writing before selecting the preferred proposal.
Organise the work around the living room
Arrange a clear delivery route and a protected working area. Ask how the installer will move the appliance across existing floors and what furniture must be removed. Keep children and pets away from the work area, and agree on how soot and demolition dust will be contained.
Schedule any surrounding restoration with the installer so new finishes do not obstruct later work. A practical sequence might involve inspection, agreed preparation, required repairs, installation and final decoration, but the contractor should determine the order for the actual project. Avoid booking an inflexible painter’s date before concealed conditions are known.
Plan temporary heating if the room will be unavailable during cold weather. Discuss weather-dependent roof work and how the opening will be protected if installation cannot be completed in one visit. These details belong in the programme even when the visible conversion appears small.
Make operating instructions part of handover
NSW Health recommends using dry, seasoned, chemically untreated wood, operating the heater correctly and arranging chimney cleaning. Have the installer demonstrate the selected appliance’s controls and explain the manufacturer’s fuel and maintenance requirements. Keep that practical explanation specific to the model rather than relying on habits developed with the old open fire.
Ask about commissioning, initial-use instructions and what to do if smoke enters the room or operation seems abnormal. Stop using a suspect installation and contact the appropriate professional rather than attempting to alter the flue or safety components. Confirm the inspection and service arrangements before the installer leaves.
Collect the installation information, approvals, relevant certificates, product details and warranties with your renovation handover documents. Record the positions and specifications of concealed work where available. Those records support future maintenance and help the next person servicing the heater understand what was installed.
A well-planned fireplace conversion balances the room’s appearance with a suitable appliance, a properly assessed installation and a manageable ownership routine. Settle the flue, hearth and surrounding construction first; the finished fireplace will then be designed around the home you have, rather than around assumptions made before anyone inspected it.