Suggest gas combi boiler

[Depo]

Hi guys,


I`m looking for ultimate gas combi boiler, for underfloor heating, but struggling to find such. Can you advise? Must have following spec:


1. 24-30kw - 1 bed flat.
2. Stainless steel heat exchanger
3. Minimum of 12.3L/min at 35 degrees
4. Modulation 1:6
5. Minimum efficiency of 89%
6. No more than 40dB when burning at max
7. Consumes no more than 87w when burning at max and no more than 5w when idle
9. Brass/copper instead of plastics inside
10. Does have optional 7 day timer.


Thanks

 

[Rickster123]

28-30kw for a 1 bed flat?

Welcome to the forum by the way!

 

[ShaunCorbs]

and underfloor heating in a one bed flat lol first time ive heard of underfloor going in a flat

 

[Depo]

Because I don`t want to shower(at 40 degrees), then somebody starts washing dishes in kitchen and flow/pressure drops. Or washing machine starts running. I prefer to have guaranteed flow.

 

[Depo]

and underfloor heating in a one bed flat lol first time ive heard of underfloor going in a flat

Why not? Radiators don`t look good, take up space, don`t heat efficiently. Also the kid and cat can enjoy warm floor(and me walking bare feet). And UFH cuts my gas bills. BTW its got high ceiling, not rabbit box newbuild, bigger than average.

 

[Ray Stafford]

Because I don`t want to shower(at 40 degrees), then somebody starts washing dishes in kitchen and flow/pressure drops. Or washing machine starts running. I prefer to have guaranteed flow.

Then dont buy a combi.

 

[ShaunCorbs]

Because I don`t want to shower(at 40 degrees), then somebody starts washing dishes in kitchen and flow/pressure drops. Or washing machine starts running. I prefer to have guaranteed flow.

kw doesnt = more pressure and if you want decent flow unvented system is what you want

 

[Depo]

Vaillant boiler for example:

At 42 degrees it provides 7.8L/min, but at 35 9.4L/min. It makes me think that getting higher kw boiler will give me more water at 42 degrees.

 

[Depo]

Then dont buy a combi.

I meant flow at specific temperature.

 

[rpm]

and underfloor heating in a one bed flat lol first time ive heard of underfloor going in a flat

There are some big flats around mate.