Difference between 15Ri and 15i Worcester Bosch boilers

7 Apr 2010
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United Kingdom
I need a new boiler, probably the Worcester Bosch 15Ri but I wondered if there were advantages to getting a 15i.

On the WB comparison page, the 15i seems to have more features than the 15Ri, but I'm not sure of the significance. Please could someone tell me in layman's terms what I'd be missing with the 15Ri and whether it's worth paying more for the 15i. Thanks.
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