M
mooey
No cant open.
Cant hang.
Cant pipe up.
Disagree with you on this one a sparks can open the case to wire it.so they don t have to be gas safe.Joe bloggs can buy a boiler from b and q and hang it pipe it and even do the flue in a court of law as long as you don t connect it to the gas thats fine no one could legally do anything to you you could say its art you could run the gas upto the meter you could say water going to go through it long as you don t interfere with the gas you ll have no problems.100 of people do this every day than get a gas safe bod to do the last bits and sign it off 100s of gas safe firms get plumbers to fit boilers I ve done my fair share before I was gas safe and get the registered guys to sign it off
But if in doubt about anything than don t