We are looking to replace a conventional boiler / cylinder / water tank with a combi. The property is a bungalow with dormer bedrooms. and there is only room for a smallish ‘belly’ cylinder in the roof space, plus it needs a pump to supply the upstairs dormer bathroom which generates unwanted noise. The hot water to the downstairs bathroom / kitchen is not pumped and has poor flow. Replacing all this with a combi should solve our noise and limited hot water problems and free up more space in the loft. I don’t believe pressure / flow would be an issue, as we have over 5 bar, and the flow measured at the garden tap is nearly 30l/min.
I done plenty of reading in these forums etc, and believe the preferred solution is always to avoid a combi if possible and go with an unvented (or conventional) cylinder and regular boiler, but space is really at a premium We have 14 radiators in the house and two bathrooms.
I am thinking along the lines of a Worcester 38Cdi or maybe 42Cdi. Also looking at storage combi – the Veissmann 111-w. The similar Vaillant 938 seems just too big a unit.
Can anyone please advise which if these may be more suitable, or an alternative? I’m not concerned about running 2 showers at the same time as that is very rare, but about 1 shower running when a tap or two is opened. I think for the heating aspect, at 35kw they are all more than is needed. The Veissmann seems to modulate down lower than the WB’s, which could be beneficial there, but I wonder if the tank in it really adds anything to my setup (and is always kept hot as far as I can tell). It there any real advantage of the 42cdi over the 38cdi? (do I even need the 38Cdi?).
Thanks!
I done plenty of reading in these forums etc, and believe the preferred solution is always to avoid a combi if possible and go with an unvented (or conventional) cylinder and regular boiler, but space is really at a premium We have 14 radiators in the house and two bathrooms.
I am thinking along the lines of a Worcester 38Cdi or maybe 42Cdi. Also looking at storage combi – the Veissmann 111-w. The similar Vaillant 938 seems just too big a unit.
Can anyone please advise which if these may be more suitable, or an alternative? I’m not concerned about running 2 showers at the same time as that is very rare, but about 1 shower running when a tap or two is opened. I think for the heating aspect, at 35kw they are all more than is needed. The Veissmann seems to modulate down lower than the WB’s, which could be beneficial there, but I wonder if the tank in it really adds anything to my setup (and is always kept hot as far as I can tell). It there any real advantage of the 42cdi over the 38cdi? (do I even need the 38Cdi?).
Thanks!