This detailed 2 page, Quality Assurance check sheet is specifically compiled for the Installation of Ductwork. The document contains a comprehensive 21 point checklist and is aligned with DW144 / EN / BS and ISO standards and specifications. This document is in Word format for easy electronic infilling. When purchased, you will be sent an email with a downloadable link for instant and easy download to any electronic device. The link does not expire, that means you could download this document in future as and when you need it.