Welcome, Koh, and congrats on the beautiful installation. One observation though, the enclosure seems too tight, apparently sealing the unit from the outside air. A Stevenson shield is the perfect solution here.
You might want to add a few (big) holes at the bottom and on the sides of the plastic enclosure.

I am discussing this with the manufacturer, will get back with a reply.

Hi Terje,

Please see the diagram attached for the A3 enclosure sizes.

The unit comes with a 9V 1A adapter. The device, depending on connectivity model, uses about 1W, so at 9V the current is +/- 110mA.
A3 can be powered with any voltage between 6V and 28V thanks to its internal high efficiency converter.

It looks like the Bosch BME680 failed. I will need to replace the sensor in your unit.

I see the VOC value is 12799999, that is an invalid value.

But this is strange. The VOC is returned by the Bosch BME680, together with temperature, pressure and humidity, and these 3 are ok. Even more, the sensor communication is digital, over I2C, leaving no space for error.

I issued a remote reset request for 8200004F, to reinitialise the sensor. If the problem persists, I will need to have your BME680 replaced.

LE: https://uradmonitor.com/?open=8200004F&sensor=voc

@ShimmerNZ private messaging has just been added. Thanks for the excellent suggestion!

This will be fixed soon. HTTPS is back.