"I have been onto Vent-Axia asking about this. Reson being that having bought the 100H I looked on the Vent-Axia website where it says the Lo-Carbon models are 100B, 100T and 100HT. I wrote to them asking about the 100H - this is their reply to the 100H:
"In the Lo Carbon Range we sell the Silhouette 100 HT and in the non Lo Carbon Range Silhouette 100H "
I have not actually installed it hence the mediocre review - this is to highlight that it's not what is actually being advertised.
A quick look for the 100H on the Vent-Axia website comes back that it's not a lo-carbon one - indeed they don't seem to be selling it, which they do their other ones.
Also all the Stats on the Screwfix page are INCORRECT. They should be: xtraction Rate 75m³/hr NOT 95m³/hr Noise Level 38dBA at 3m NOT 32dBA at 3m 14W Not 6W Power Consumption"