[VENTILATION] How to install your Nicoll ceiling hatch?

Par Bat info source: Nicoll France via YouTube

Nicoll has developed its new TP2020I21 ceiling hatch, compliant with RE 2020, with a high level insulating capacity R=10m². K/W Made from synthetic materials and 100% recyclable, this ceiling hatch obtains results in waterproof tests, significantly higher than those on the market (wood or metal). Its patented opening-closing system also contributes to these good results.