Are gas burnishers safe to use indoors?

Why a gas machine needs the conversation an electric one does not

Carbon monoxide is a colourless, odourless product of incomplete combustion. Any LPG or petrol engine makes some, and a burnisher is an engine run at sustained load in an enclosed building — a supermarket aisle, a shopping centre after close, a warehouse. That is the reason gas burnishers are governed differently from electric ones: not the noise and not the fuel handling, but the exhaust and the people breathing it.

POLIVAC's answer across the LPG range is Closed Loop Engine Emission technology. The GAZ20K description explains the mechanism: the system detects pressure changes and stabilises the fuel mixture automatically, rather than relying on a carburettor setting that drifts as the engine warms, the load changes or the cylinder empties. An engine running lean or rich is an engine making carbon monoxide, so holding the mixture is what holds the emissions down.

What POLIVAC claims, and what it does not

The claims are specific and they are POLIVAC's own. The Gas 38 and the GAZ 16 Gen II state CO emissions under 30 ppm. The Gas Shark states that the system ensures CO emissions are minimised and maintained at safe levels, below the workplace exposure standard determined by Safe Work Australia. Separately, the Gazda 42's gas control system is stated to meet or exceed regulations including AS 1425 and the Queensland Gas Act.

What none of that replaces is site control. Closed Loop reduces what the machine produces; it does not measure the air in the room, it does not account for how large the space is or how often it turns over, and it does not know if a service interval has been missed. The exposure standard that applies, and the ventilation and monitoring needed to stay inside it, are a site obligation — check the current Safe Work Australia workplace exposure standard for carbon monoxide and your own state regulator, rather than a figure from a product page.

When it matters

This is the specification to ask about before an LPG machine goes into a building that is not a warehouse. Gas burnishers exist because they solve a real problem — no cable, high output, 1,500 to 2,500 RPM sustained over thousands of square metres a night — and on a large open retail floor with the doors up they are the right machine. The question is not whether gas is acceptable but whether this space, at this time of night, with this ventilation, is.

Treat emissions control as a maintenance item, not a purchase decision. The Closed Loop system is only doing its job if the engine is serviced, the gas system is sound and the machine has not been modified, so the claim on the product page depends on the service record behind it. Where a site has enclosed areas, low ceilings, or works with the building sealed, the honest answer is often a battery burnisher instead — the Stealth runs 2,000 RPM for around two hours on a charge with no exhaust at all.

Whatever the machine, do not run it as though the technology removes the obligation. Ventilate, monitor carbon monoxide where people are working, train operators to recognise symptoms, and stop the machine if anyone reports headache, dizziness or nausea. Carbon monoxide poisoning is not something to diagnose from a spec sheet.