What documentation from Halstead did he give you?
Call H witht he serial number and they'll tell you when it was made - it isn't current I'm pretty sure.
There are some circumstances where a noncondensing boiler can be fitted, but usually only in flats. there's a score chart I'll look for.
If he's fitted a secondhand boiler , or an "old" new one illegally, you've got him by the nuts.
edit - the long answer...
http://www.idhee.org.uk/ExceptionsGuide.pdf
Call H witht he serial number and they'll tell you when it was made - it isn't current I'm pretty sure.
There are some circumstances where a noncondensing boiler can be fitted, but usually only in flats. there's a score chart I'll look for.
If he's fitted a secondhand boiler , or an "old" new one illegally, you've got him by the nuts.
edit - the long answer...
http://www.idhee.org.uk/ExceptionsGuide.pdf