boiler rateing

[pauls]

just to make things a bit more clear in my head when i look a the vaillant boilers the rateing 837 is 28kw for heating max out put 37kw for hot water
and the 6 series is 26kw heating 30 being hot water.

when you look at the worcester 28cdi is that refering to the heating kw or the hot water

 

[fuzzy]

just to make things a bit more clear in my head when i look a the vaillant boilers the rateing 837 is 28kw for heating max out put 37kw for hot water
and the 6 series is 26kw heating 30 being hot water.

when you look at the worcester 28cdi is that refering to the heating kw or the hot water

max kw, heating is usually slightly less

 

[GreenArmy]

As fuzzy says, it is based on hot water kw.

 

[pauls]

exellent, cheers fellas i was thinking it was heating it refared too.

so really anything under 28kw aint really worth it

 

[GreenArmy]

exellent, cheers fellas i was thinking it was heating it refared too.

so really anything under 28kw aint really worth it

Well if its a one/two bed flat with just a shower then a 28kw might be overkill.

 

[pauls]

yep agree

for your tyipical 3 bed house 28 min i meant (in my head anyway lol)

 

[fuzzy]

a 28kw for most modern houses with an on-suite, main bathroom and downstairs cloak it should be fine. The hot water demand is usually the greater anyway. I have calculated heat loss on modern 3 bed semis and got heating ouput requirement of 7.5kW! Therefore a 28kW is greatly oversized for the heating load but it should govern down automatically, so u only use what u need. The higher outputs on combis are simply for the hot water demand. as mark alludes, horses for courses