Imperial Ductwork Services Ltd holds LPCB approval in the RedBook as an approved installer of passive fire protection products, certificate 1654PI. Its LPS 1531 scope reads: “Company assessed and approved for installing or applying passive fire protection products under the following scope:- Appendix 5 - Fire rated ductwork systems- Appendix 6 - Fire resisting dampers.” ⚠ the RedBook publishes no address for this holder; the website was resolved from the company name and verified against the register’s city.