We fit over a 100 oil boilers a year probably less than 5 of those are fitted without a plume kit
They are not expensive typically £150/£170 take about 10 minutes to fit.
Not worth the hassle of arguing the toss with customers neighbours.
The boiler is a Grant Oil multi pass 70/90 piello RD13 type PJ. I believe the building control regs say the flue only needs to be within 600 mm of the boundary, and it is within 2 metres.
I wonder if the larger plume has been caused by the fuel pressure being increased, as there was a problem with getting all the radiators in the house warm?
Either way, I'm happy to put a flue extension kit on the existing flue and deflect towards the front of my house away from the neighbour. I'm getting an oil boiler engineer to come and check everything over.
I don't know how old the boiler is exactly as the previous owner of my house installed it and all his documents lack dates. The installation instructions have 2002 on it, but that might just be when the document was produced not when the boiler was installed.
But it does look old.
Documentation doesn't say whether condensing or not but an Internet search says non-condensing.
If your boiler has recently started what looks like plumeing
I would get it checked urgently.
I would suspect internal leak on heat exchanger problems getting it up to temperature could also be same cause.
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