What is the minimum clearance above a gas cooktop?
Quick Answer
Under AS/NZS 5601.1:2022 (Clause 6.10.1.1), the minimum overhead clearance from the highest burner of a gas cooktop to a rangehood or downward-facing combustible surface is 650 mm for all new installations. For exhaust fans, the minimum clearance is 750 mm. If the manufacturer's instructions specify a greater clearance, the manufacturer's specification must be followed.
For licensed gas fitters and plumbers across Australia, getting cooktop clearances right isn't just about passing an inspection—it's a critical fire safety requirement. The release of AS/NZS 5601.1:2022 introduced significant changes to overhead clearances, catching out many tradespeople who were still working to the old 600 mm rule.
This guide breaks down the current clearance requirements for gas cooktops, specific regulations under Queensland legislation, and the practical implications for your day-to-day installations.
The Core Standard: AS/NZS 5601.1:2022
The primary reference for gas cooktop installations is AS/NZS 5601.1:2022 Gas installations, Part 1: General installations. The 2022 update brought a crucial change to overhead clearances that every gas fitter must know.
Clause 6.10.1.1: Overhead Clearances
According to Clause 6.10.1.1, the minimum clearance from the top of the highest burner (the trivet) to the lowest part of the rangehood or downward-facing combustible surface must be 650 mm. This is a 50 mm increase from the previous 2013 standard.
Key measurements to remember:
- To a rangehood: Minimum 650 mm
- To a downward-facing combustible surface (e.g., overhead cupboards): Minimum 650 mm
- To an exhaust fan: Minimum 750 mm
Important Note: If the appliance manufacturer's installation instructions specify a clearance greater than 650 mm (for example, 700 mm), the manufacturer's instructions take precedence and must be adhered to.
Clause 6.10.1.2: Side and Rear Clearances
While overhead clearance is the most common issue, lateral clearances are equally important. Clause 6.10.1.2 dictates that the clearance from the periphery of the nearest burner to any vertical combustible surface must be at least 200 mm.
If this 200 mm clearance cannot be achieved, the combustible surface must be protected. The protection must extend a minimum of 150 mm above the burner and cover the full width or depth of the cooking surface area. Acceptable protection methods include 5 mm thick toughened glass (provided it is certified for this use) or fire-resistant board.
Queensland-Specific Regulations and Penalties
In Queensland, gas work is heavily regulated to ensure public safety. While the technical requirements are governed by AS/NZS 5601.1, the legal framework and enforcement fall under state legislation.
Petroleum and Gas (Production and Safety) Act 2004
Under the Petroleum and Gas (Production and Safety) Act 2004, specifically Section 726 and Section 727, carrying out gas work without the appropriate licence or authorisation is a serious offence. Furthermore, performing non-compliant gas work that breaches the safety standards (such as failing to meet the 650 mm clearance) can result in severe penalties.
The regulatory body, Resources Safety & Health Queensland (RSHQ), actively investigates non-compliant installations. Penalties are calculated using penalty units. As of July 2026, the value of a penalty unit in Queensland is $172.70 AUD.
For a licensed gas fitter, failing to comply with the safety standards can result in fines of up to 500 penalty units, equating to a maximum penalty of $86,350 AUD. In cases where non-compliant work leads to property damage or injury, the consequences can include licence suspension, cancellation, and even imprisonment.
QBCC Act 1991
The Queensland Building and Construction Commission Act 1991 (QBCC Act) also plays a role. Defective or non-compliant gas installations can be classified as defective building work. The QBCC can issue a Direction to Rectify, forcing the contractor to fix the non-compliant clearance at their own expense. Failure to comply with a direction is an offence and can lead to demerit points and further fines.
Practical On-Site Examples
Theory is one thing, but how does this play out on site? Here are a few scenarios you might encounter:
Scenario 1: The Kitchen Renovation
You are called to connect a new gas cooktop in a renovated kitchen. The cabinet maker has installed the overhead cupboards and rangehood based on the old 600 mm standard. When you measure from the top of the trivet to the rangehood filters, it's exactly 600 mm.
Action: You cannot legally connect the gas. You must inform the builder or homeowner that the installation does not comply with AS/NZS 5601.1:2022. The rangehood or cupboards must be raised to achieve the minimum 650 mm clearance before you can issue a Gas System Compliance Certificate.
Scenario 2: Replacing an Existing Cooktop
A customer wants to swap their old gas cooktop for a new one. The existing rangehood is 600 mm above the old cooktop. Does the new 650 mm rule apply?
Action: Yes. The installation of a new appliance triggers the requirement to comply with the current standard. You cannot simply swap the appliance if the overhead clearance is non-compliant. The overhead structure must be modified to meet the 650 mm requirement.
Common Compliance Pitfalls
Even experienced gas fitters can get caught out. Here are the most common mistakes made regarding cooktop clearances:
- Measuring from the wrong point: The clearance must be measured from the highest part of the burner (usually the top of the trivet where the pot sits), not from the glass or stainless steel base of the cooktop.
- Ignoring manufacturer instructions: Assuming 650 mm is always enough. If the manual says 700 mm, 650 mm is a fail. Always read the installation manual before roughing in.
- Forgetting the exhaust fan rule: Rangehoods need 650 mm, but ceiling exhaust fans directly above the cooktop require 750 mm.
- Combustible splashbacks: Installing a gas cooktop closer than 200 mm to a combustible splashback (like acrylic or standard glass) without proper fire protection.
- Relying on the cabinet maker: Assuming the cabinet maker knows the gas regulations. Always verify the measurements yourself before commencing work.
Frequently Asked Questions
Does the 650 mm clearance apply to electric or induction cooktops?
No. AS/NZS 5601.1 only applies to gas installations. Clearances for electric and induction cooktops are dictated by the appliance manufacturer's instructions and the wiring rules (AS/NZS 3000). However, 600 mm is a common minimum for electric cooktops.
Can I use a heat shield to reduce the overhead clearance?
No. Clause 6.10.1.1 does not allow for the overhead clearance to be reduced by using fire-resistant materials or heat shields. The 650 mm minimum is absolute for rangehoods and downward-facing combustible surfaces.
What if the existing kitchen cannot be modified to achieve 650 mm?
If modifying the overhead cabinets or rangehood is impossible, the only compliant solution is to install an electric or induction cooktop instead of a gas appliance, provided the electric cooktop's manufacturer instructions allow for the existing clearance.
Who is responsible if the clearance is wrong?
The licensed gas fitter who installs and certifies the appliance is ultimately responsible for ensuring the installation complies with AS/NZS 5601.1. If you sign off on a non-compliant installation, you are liable for the penalties and rectification costs.
Staying on top of changing regulations like AS/NZS 5601.1:2022 can be a headache, but it doesn't have to slow down your business. TradeDesk's AI-powered platform helps Australian plumbers and gas fitters automate compliance checks, generate instant certificates, and keep track of the latest standards—so you can focus on the tools, not the paperwork.