What distance flue from vertical wall for veismann boiler

[Mojo12345]

Hi I’m thinking of getting a new veismann boiler what distance should the vertical flue be Fromm an adjacent wall? Is it 500mm or 300mm Any help would be great thanks, the boiler installer says 600mm but instructions say 300mm dunno I am confused

 

[Mojo12345]

I got 300mm from adjacent wall?

 

[muggles]

It's 300mm as per instructions. What's wrong with your existing boiler?

 

[Mojo12345]

It’s 300 the boiler surveyer said it’s 600 and wanted me to uplift the felt and reposition flue, I’ve just hd the new felt roof done! Hence important the distance is correct thanks I’ll have to email them,
boiler is making booming gurgling bubbling sounds when central heating is on, the whole street can hear it?

 

[muggles]

Could just be a knackered pump, shame to buy a whole new boiler for want of a pump

 

[Mojo12345]

The pump is ok, it’s the heat exchanger which may be buggered ? Dunno

 

[Mojo12345]

I’ll try and upload the sound if possible