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Of the burners that have been tested under the 'Canterbury Method', which is arguably a better representation of everyday use, the Cromwell stood out with the fewest emissions. The environmentalist's choice.
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No obvious bad points.
Testing for emissions, efficiency and power output using AS/NZS 4012/4013 was carried out by an independent lab in New Zealand.
We analyse data from National Environmental Standards (NES) testing to generate scores out of 10 for emissions and efficiency, along with an overall score. This gives us a clear picture of the performance, features and specifications for almost every model on the market.
Where available, we've also included the NZHHA output results. These results reflect the absolute maximum heat output you could achieve in your home.
Price is from the manufacturers’ survey and is without a flue kit unless stated otherwise.
Overall score includes:
468 x 1188 x 547
Steel fire box, 2 burning chambers for clean burn
I did an initial youtube review here https://www.youtube.com/watch?v=LNSe8F9dzDY and it does make the room hot but so does my 1.5kW electric heater. They advise building the fire up but a top down burn is much easier and just as effective. I did a video on a top down burn https://www.youtube.com/watch?v=WbgAPdY0Nnk
Takes 45 minutes to reach ULEB mode and needs careful watching as otherwise the downdraft burning mode splutters and the glass blackens indicating dirty combustion. You can see in the above video how dirty the bottom chamber glass gets. It looks difficult to remove the metal plates at the top to repaint as a result of rusting. I just don't believe it's generating 13kWh of heat. Maybe it would better with a fan assist in the downdraft mode.
Maybe, it depends on what you're after.