Combi boilers - latest models?

Wall mounted Alpha CD50 will fill the bath no problem and fast. Other wall mounted job is Eco-Hometec. There are floor mounted high flow combis: Gledhill Gulfstream, Viessmann 333, Worcester-Bosch, Ideal Istore, ACV Heatmaster.

Other combis with a 40kW ratings will give a decent flow, but no more. You could buy the MAN Micromat at 76kW but your gas supply will need uprating.

Another option is a small CH system boiler for CH only and have a high flowrate Japanese Rinnai multi-point water heater.

Our plumber recommended and fitted an Ideal ISAR 35 for our 2-bed terrace:

Fills the roll-top bath fast enough

New rules? It didn't last time......

Monday morning so Matt is babbling. Matt, what are you on about?

You had better ask Matt.

The question that I was asking, was that in the past, you have always suggested that gas supplies can be used substantially beyond their specified rating.

Now it appears that you've changed your tune....

Ive just bought a Alpha CD32C from

darren

If you're changing from a storage system, check your mains cold water flow rate. What dribble conveniently ignores when quoting adverts is that many parts of the country have mains flow rates so poor that a large combi won't perform to spec.

That is technically so, and was teh case when the old gas boards were in charge.

Nope. The privateers want you to pay for a larger meter.

So which is it then?

Does the supply need to be upgraded or not? If it does, why didn't it last month when you said that it didn't?

Also, are you saying or implying that the old gas boards condoned use of their equipment and supplies beyond specification?

The supply pipes and the meters didn't suddenly change at the time of privatisation, so if it was technically possible then (even if not to spec) to use the supply beyond its rated capacity, it must still be now. It doesn't appear that Transco employ an army of police to check into installations of 76kW boilers on domestic supplies.

Just saying that the "privateers" want you to pay for a new meter is not an answer to that.

Helped by its 52 litre store. Despite its name it is only a 32kW combi. A W-B 40HE actually delivers 39.1kW. Someone with time on their hands will be able to tell the OP which will fill the bath more quickly.

Dave Plowman's comment re mains flow should not be ignored.

Matt, if I was installing the combi for myself I would not upgrade the meter.

Within specs.

No, the focus on ripping you did though.

It is.

The Alpha will. You judge combis by flowrate, the Alpha will fill the bath faster. Got it?

OK, but that was not the question.

So have the specs changed?

Did the spec. change?

You have evaded the question as usual.

Matt, the answer was clear. How is it down the the clinic?

None of the above - something with huge quantities of proper hot water storage beats them hands down :-)

Lord Hall, wrong again. The Man Micromant 76kW gives about 30-35 litres/min of hot water.

Indeed. On dribble's planet all mains water is at 5 bar+. But in his own flat the combi is fed from a header tank. Wonder what this tells everyone?

FWIW in the this part of S London it is poor - even with new plastic mains into the house.

You wouldn't need to given you already have about the smallest one made. How about some views based on experience rather than adverts? Some chance...