Fitted a couple of HE15's and got another to fit next week, quite like the setup
and easy to fit, check the nut on the outlet side of the gas valve as it wasn't very tight on either of the ones I fitted.
BG et al have fitted zillions, early problems sorted now. Some query the longevity of an aluminium heat exchanger - jury's still out on that one. Bosch use Al too , but they may be cleverer!
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