Boiler Size Opinion

Discussion in 'Plumbing and Central Heating' started by Kerjakp, 27 Nov 2021.

  1. Kerjakp

    Kerjakp

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    Hi,

    Appreciate if I could get a couple of opinions on below.

    Daughter has 2 bed flat 11 rads total(7 actual rads but some double panel)

    Had a 28cdi (24kw 10l flow rate) fitted on understanding this would heat flat and be OK to run a shower off of as well when electric shower is eventually replaced.

    Seems a bit on small side for this but I'm no expert and would be grateful for any advice or opinions.

    Many thanks.

    John.
     
  2. Madrab

    Madrab

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    It kind of depends how large the rads are but if they all average out @ say around 600x1000 K2's (Type 22) then there's loads of headroom in that boiler to cope with that demand.

    It will cope with a normal mains fed bar shower too @ 10L/min, that's also dependent on the cold mains pressure and flow or course.
     
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  4. oldbuffer

    oldbuffer

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    1. Average radiator is 1.5 kW, obviously some more, some less. 7 x 1.5 = 10.5 kW heating load.
    2. Shower should be OK for anything but a giant rainhead.

    28 cdi should be fine.
     
  5. FiremanT

    FiremanT

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    Which element are you concerned about? Heat or HW, or when both are on?

    If, as I suspect, it is the latter, then worry not. If the heating is ON , and you demand HW, the effort is diverted entirely to HW, and the CH is OFF.
    It is plenty big enough.
     
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  7. Kerjakp

    Kerjakp

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    Many thanks for replies.

    Majority vote for boiler ok and mind now at rest.

    Cheers,

    John.
     
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