How to Identify Your Brivis Heater Part Number: Step-by-Step
Written by Rica Francia Macaspac, HVAC Shop content writer, in consultation with Aussie HVAC tradies and industry experts. Published: June 2026 · Last reviewed: June 2026.
Ordering the wrong Brivis spare part is more common than most people realise — and it almost always comes down to one thing: not having the correct part number before placing the order. A pressure switch that looks identical to the original but carries a different Pa rating. A thermocouple that's two inches too short to reach the pilot flame. A control board variant that communicates differently to the rest of the system. The fix for all of these is the same: identify the BS part code from your unit before you order anything. This guide walks through exactly how to do that, step by step. If you already have your part number, you can search directly through our Brivis spare parts by part number collection.
Where to Find the Data Plate on Your Brivis Heater
The data plate is your starting point for any Brivis parts identification task. It's a metal or adhesive label fixed to the heater unit itself, and it contains the key information you need to identify compatible replacement parts: the model number, the series designation, the serial number, the gas type, and the input/output ratings.
On most Brivis ducted gas heaters, the data plate is located in one of three places. The most common location is inside the front access panel — remove the panel by lifting it or releasing the retaining clips, and the data plate will typically be visible on the inside of the panel itself or on the front face of the unit body. On some older models and certain CSX-series units, the data plate is fixed to the external body of the heater, either on the side or rear. On ceiling-mounted units, which are common in Queensland homes and commercial buildings across northern Australia, the panel is accessed from below and the data plate is usually on the internal face of the dropped panel.
Before you do anything else, take a clear photo of the data plate. You'll want it as a reference for the rest of this process, and having it handy means you don't need to revisit the unit if a question comes up while you're ordering.
The data plate will show the following information, though the layout varies between model generations. Look for: the Brivis model name and number (for example, NetworkPlus NP16, Star 16, or CSX 23), the serial number (a unique alphanumeric string), the gas type (NG for natural gas or LPG for liquid petroleum gas), the MJ input and output rating, and the year of manufacture. Some data plates also list key component BS codes for the fitted pressure switch and transformer — if yours does, note these down as they're useful for parts identification.
Tradie Pro Tip: On service calls in dusty environments — think regional NSW farm sheds, WA grain storage facilities, or older Queensland homes where the heater is in a poorly sealed roof cavity — the data plate label can be coated in a layer of fine dust or grime. Wipe it down with a dry cloth before photographing. A blurry or partially obscured model number will slow down every step that follows.
Reading BS Part Codes
Every genuine Brivis replacement component carries a manufacturer part number prefixed with BS — or in some older cases, just B. This BS code is the most reliable identifier for any Brivis spare part and the number you need when searching for a replacement. Understanding how to read it takes the guesswork out of parts ordering.
The BS prefix simply stands for Brivis Spare (or Brivis Spare part, depending on who you ask inside the company). What matters is the number that follows. The numeric portion of the code identifies the specific component, its specification, and in some cases its variant. For example, BS80021373 is the part number for the 80Pa pressure switch — the digits encode the component type and pressure rating. BS81008783 identifies the N-E6 control board with integrated switch, while BS81065300 identifies the N-E6 without switch. Two boards that look nearly identical, with BS codes that differ only in the last few digits, are genuinely different products that perform differently in the system.
The BS code is printed on the component itself — typically on an adhesive label attached to the component body, or in some cases stamped directly into the casing or moulded into the plastic housing. When identifying a replacement part, the workflow is straightforward: locate the component you need to replace, read the BS code from it directly, and use that code to find the correct replacement. Do not try to identify parts by appearance, dimensions, or description alone. Parts that look identical can carry entirely different BS codes and specifications.
For components where the original label has been damaged, faded, or removed — which is not uncommon on heaters that are ten or fifteen years old — the model number from the data plate becomes your fallback reference. A good HVAC parts supplier can cross-reference the model number to identify the correct components for your unit, as long as you can also confirm the gas type and any other variant-specific details.
Identifying Gas Type: Natural Gas vs LPG
Gas type is listed on the data plate and it's one of the most important details to confirm before ordering any gas-contact component. Brivis heaters are configured at the factory for either natural gas (NG) or LPG, and several key components — including the gas valve, pilot assembly, and burners — are manufactured to suit a specific gas type. They are not interchangeable.
The data plate will show either "NG" (natural gas) or "LPG" (liquid petroleum gas, also known as bottled gas or propane in some contexts). In some cases, particularly on older units, you may see the gas type described as "GN" or listed alongside the operating pressure in kilopascals. If you're unsure, the gas supply to the unit will confirm it — mains gas connected via a regulated gas meter is natural gas; a cylinder or tank supply is LPG.
Ordering the wrong gas type is one of the most common — and most frustrating — mistakes in Brivis parts ordering. The part arrives, it physically fits the unit, and the installer only discovers the error when the flame characteristics are wrong, combustion analysis fails, or the unit locks out under fault conditions. In a worst case, an incorrect gas type component installed and commissioned creates a safety risk and a breach of AS/NZS 5601.1. It's a five-second check on the data plate that prevents a potentially expensive problem.
Did You Know? LPG conversions of Brivis heaters do exist — some older units were originally installed on natural gas and later converted by a licensed gas fitter when the property switched to LPG. If the data plate says NG but the supply is LPG (or vice versa), don't assume the data plate is wrong. Verify the current gas supply with the homeowner and check for any conversion stickers or documentation on the unit before ordering.
Pressure Switch Pa Rating Identification
The pressure switch Pa rating is the detail that generates the most incorrect orders across the entire Brivis spare parts range. It's worth understanding clearly because getting it wrong means the heater either won't operate at all or will operate unsafely.
Pa stands for Pascal, the unit of pressure. The pressure switch on a ducted gas heater monitors the pressure differential created by the combustion fan — it confirms that the fan is drawing air through the heat exchanger at the correct rate before allowing the gas valve to open. The Pa rating defines the exact pressure differential at which the switch trips. If the switch trips too early (too low a Pa rating) or not at all (too high a Pa rating), the safety circuit is compromised.
The Pa rating is determined by the combustion fan specification and heat exchanger design of the specific heater model. Brivis heaters across the range use switches rated at 50, 80, 115, 140, and 165Pa. A unit that was fitted with a 115Pa switch at the factory needs a 115Pa switch as a replacement — fitting an 80Pa switch in its place will likely cause the switch to trip before adequate airflow is established, resulting in a lockout. Fitting a 140Pa switch means the switch may never trip even when airflow is insufficient, removing the safety function entirely.
The Pa rating is printed on the label of the original pressure switch. Look for it on the body of the switch itself — it will typically appear as "80 Pa", "115Pa", or similar. The BS code will also confirm it for anyone who knows how to read the code structure. As an example, the 115Pa pressure switch (BS80021374) and the 80Pa variant look nearly identical physically but carry different BS codes and perform different functions in the safety circuit. Always read the Pa rating from the original switch — do not estimate or substitute.
For Brivis pressure switches, the Pa rating and bracket length must both match the original exactly. Do not order by appearance alone, as switches with the same shape can have different pressure ratings or mounting brackets.Transformer Amperage Identification
The transformer steps mains voltage (240V AC) down to the 24V DC used by the Brivis control circuit, gas valve, and electronic components. When a transformer fails, the heater goes completely dead — no display, no response, no fan activity. Transformer identification is usually straightforward, but the amperage rating must be matched correctly.
Two transformer variants are common across the Brivis range. The amperage rating — 1.75A or 2.25A — is printed on the transformer label alongside the voltage rating. To identify the correct replacement, read the amperage from the label on the transformer currently installed in the unit. The Brivis CSX transformer 1.75A (BS80024702) suits control circuits with lower current draw; the 2.25A variant (BS80021729) is required where the circuit draws higher current, which includes most current-generation models. Installing a transformer with insufficient amperage will cause it to overheat under load and fail prematurely — sometimes quickly, sometimes after a few weeks of intermittent operation that's difficult to diagnose.
Transformer replacement involves disconnection from 240V mains wiring and must be performed by a licenced electrician or qualified HVAC technician in accordance with Australian electrical safety standards.
Control Board Variant Identification
The N-E6 control board is the most widely used PCB across the Brivis, Braemar, and Bonaire platform — which might suggest it's a straightforward replacement. It's not, because the N-E6 exists in two variants that are not interchangeable, and physically they look very similar.
The two variants are the N-E6 with integrated switch (BS81008783) and the N-E6 without switch (BS81065300). The difference is the presence or absence of a small rocker or toggle switch mounted on the face of the PCB itself. This switch is part of the board's interface with the system's switching circuit, and the two variants communicate differently with the rest of the heating system as a result. Fitting the wrong variant can produce symptoms that look like a wiring fault or a second failed board — persistent lockout, failure to enter heating mode, or erratic cycling that doesn't correspond to any obvious fault condition.
To identify which variant is fitted in your unit: access the control board (usually behind the front panel), and look at the face of the board for the presence or absence of a physical switch. If a switch is present, you need the with-switch variant, BS81008783. If no switch is present, you need the N-E6 no-switch control board, BS81065300. Confirm the BS code on the original board label before ordering. If no switch is present, you need the no-switch variant (BS81065300). Confirm by cross-referencing the BS code on the original board label before ordering.
| Component | Where to Find the ID Detail | What to Read | Critical Matching Rule |
|---|---|---|---|
| Pressure Switch | Label on the switch body | Pa rating + BS code | Pa rating must match exactly — not interchangeable |
| Control Board (N-E6) | Label on board + visual inspection | BS code + presence/absence of switch | With switch and no-switch variants are not interchangeable |
| Thermocouple | Measure original or check BS code | Length (18 or 24 inch) + termination type | Wrong length won't reach pilot flame correctly |
| Transformer | Label on transformer body | Amperage (1.75A or 2.25A) | Under-rated amperage causes overheating under load |
| Gas Valve | Data plate + component label | Gas type (NG or LPG) + BS code | NG and LPG valves are never interchangeable |
| Pilot Assembly | Data plate (gas type) + assembly label | Gas type + BS code | Gas type mismatch is a safety and compliance failure |
| Burner Zip Tube | Data plate (input MJ rating) | MJ input rating of the heater unit | MJ rating must match unit input capacity |
When You Can't Read the Part Code: What to Do Next
Labels fade, components get replaced without documentation, and on a heater that's been in service for fifteen years in a roof space near coastal Queensland, the original labels may be in rough shape. If you can't read the BS code from the component directly, you still have options — and you don't need to guess.
The first fallback is the data plate. The model number and series designation from the data plate, combined with the gas type and year of manufacture (which can usually be decoded from the serial number), is enough information for an experienced parts supplier to identify the correct components for your unit. Some model series have very consistent fitment across production runs — the NetworkPlus range, for example, used the same pressure switch specification across a significant portion of its production life.
The second fallback is the component itself. Even without a readable label, physical measurements can help narrow down a thermocouple (measure the length from tip to fitting), and the combustion fan specification stamped on the fan motor housing can sometimes be used to cross-reference the correct pressure switch Pa rating. For control boards, the PCB layout visible on the board face — particularly the presence or absence of the integrated switch — is the definitive visual check.
When in doubt, contact us before ordering. Send through the photo of your data plate along with any other details you can gather from the unit — the component BS code if readable, the model number, the gas type, and a description of the fault you're diagnosing. We can help confirm the correct part before you place an order, which is a far better outcome than receiving the wrong component and facing a second wait for the correct one.
Tradie Pro Tip: If you're regularly servicing Brivis heaters across a suburb or region, it's worth building a reference file of model numbers, fitted components, and BS codes for the units on your run. A simple spreadsheet or notes app entry per unit saves significant time on repeat calls and means you can often have the right part on the van before you arrive on site.
Ordering with Confidence: A Quick Pre-Order Checklist
Before placing any Brivis spare parts order, run through this checklist to make sure you have everything you need to order the correct part the first time. Each of these details takes less than a minute to gather from the unit but can prevent a delay of several days if the wrong part arrives.
Confirm the model number from the data plate. Confirm the gas type (NG or LPG) from the data plate. Read the BS code from the component you are replacing. For pressure switches, confirm the Pa rating from the switch label. For thermocouples, confirm the length and termination type from the original component. For control boards, confirm whether the original has an integrated switch. For transformers, confirm the amperage rating from the transformer label. For gas valves and pilot assemblies, confirm the gas type matches the data plate.
With these details in hand, ordering is straightforward. If any of these details are unclear or unavailable, contact us with what you have and we can help you identify the correct part before you commit to an order. For a full breakdown of all component categories and what to look for in each one, the complete Brivis spare parts guide covers every major component type with detailed identification guidance.
All Brivis replacement parts installed on gas components must be fitted by a licensed gas fitter in accordance with AS/NZS 5601. Electrical components including control boards and transformers must be replaced by a qualified electrician or HVAC technician. For further information on licensing requirements in your state, refer to Safe Work Australia.
Frequently Asked Questions
