gas boiler

[rondeau]

I have a 30-year-old gas boiler with a rating of 35,000 BTU. Can anyone tell me how that rating translates to KW? Thanks.

[Graham-W]

Divide Btu by 3414 to give Kw.
Therefore: 35,000/3414=10.25

[Hymie]

35,000 BTU is equivalent to 10.25kW-Hour.

You need to be aware that sometimes the ratings are for total energy in, and therefore your actual energy out, may be slightly less.

[buildersmate]

Not slightly less on a 30 year old boiler - considerably less - probably around 70% efficient.

[rondeau]

Many thanks, guys, for the info - a great help. (Been on holiday or I would have thanked you sooner.)