I have experience of installing in commercial property, went the cheeky route, get your friend to bring in CHUBB for a quote and produce a plan with costings, take approved plan to supplier for parts, install the alarm and then get a local firm to commission the install, save a wad of cash, know the system is approved and covered your a..e
And the poor customer gets a closed system, with high cost maintenance each year, not really practical.....be better off linking up with a company you can partner with
Tazz I think he is just using chubb's drawings and spec to install a system and get it commissioned by others