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Sounds believable. It could be anything from half that to double, depending on your house design and quality (or quantity!) of insulation. You will have a cycling boiler. Get used to it. The (say) 10kW is what you would need on a very cold day (or more likely night) to reach and maintain a...

Admittedly, there has been a lot of discussion but you haven't really taken it in. The flow rate is not particularly closely related to the pressure. A simple way to see this is to empty a bucket over you head. Very little pressure but a spectacular flow rate. Similarly, the flow rate from a...

Define "fully" ;) The 40he has a maximum CH output of 34.4kW, modulating down to 9.6kW (non-condensing output, 12.1kW quoted when condensing). The 24kW model has heating output from 25.9kW down to 6.8kW. Big difference! Your heating requirements are unlikely to be higher than 24kW even...

Happens all the time. You join on a cheap tariff, and sooner or later they slide you onto their standard tariff prices. That amounts to a huge price rise for you, although you're still only paying the same as many other people. Keep on top of it and move whenever this happens. Sometimes the...

The requirement is not strictly mandatory, but the limits for "design" daily water use per person are so low that it is virtually impossible to achieve without using non-potable water. The planning portal level 6 example gives 30% non-potable water, and that already includes a "smaller, shaped...

A stat is important, otherwise your boiler will keep firing even when the house is warm. With British Gas prices, this doesn't make much sense. The stat is wired into the boiler. This is very simple but usually involves removing the boiler casing. In your case you already have a timer...

"Zero Carbon" is a joke. The government's own guidance document gives an example of a zero carbon (level 6) home using a "high efficiency condensing boiler". The most trivial example would be a gas boiler and solar panels on the roof, equals zero carbon provided the energy output from the...

Is the UFH laid in screed or would it be a suspended floor? Both are possible, and your engineered laminate can be used, but make sure it is done properly or it will restrict the heat and it could warp.

Zone thermostats need to be in the zone :) Also, multiple thermostats in the same location are pointless. Do be sure what the multiple controls are doing though. Has this been explained to you? Do they provide programming functions? Timers and more complex controllers can be anywhere, but...

You'll have to spend a little more and get a shower including a pump, which will give you more or less the same experience as a mains pressure shower. Possibly a better experience since you can get a higher flow rate than a combi would support. At least until the tank is empty :)

Is that a (near) horizontal pipe running a metre away from the boiler room? The closer to horizontal and the further away from any source of heat (like a house wall) and the more likely it is to freeze. Insulation is good, not to say essential on an outside run. Don't mess with the sleeve...

The BG 330+ is range rateable down to 9kW. I assume it also modulates itself down to 9kW? Specs say not, but I think that it must. This is a re-badged Vaillant, isn't it? Still looks over-sized, but maybe you have poor insulation. I'm pleased to see living proof that even "gas safe...

Here's hoping you got something out of this thread. I know it can sometimes be difficult to ignore the Waldos (sic!) who are jealous if anyone except themselves gets anything for free. It does sound to me, as a non-expert on your type of system, like there were a lot potential problems that...

No pressure, no heating. Heating? It's June! No matter. Pressure relief valve may be stuck open, so you can't get any pressure in the system. You might be able to jiggle the valve shut but probably it needs replacing. It may have blown because of a different problem but that is hard to...

Cobblers! And no, my shoes don't need repairing ... The circulation pump is indeed for moving hot water around the house but it has nothing to do with running less cold water down the drain. When the boiler is heating water, the circulation pump moves it around through the radiators and...

It is almost irrelevant what the direct debit payment is. How much gas are you actually using? Has it tripled compared to the same period a year ago? Let's assume it has, and not that the gas company is just inflating your payments to improve its cash flow. The boiler would cost about...

The most powerful electric showers I've seen are about half the power of a small combi, and less than a third the power of a large combi. That's a half or a third as much hot water you'll have to play with. In other words, especially in winter you'll be standing under a light drizzle at best...

So there you have it: four response, five different opinions. BTW, the answer is "no" ;) That's "no, not in the kitchen" in almost all circumstances. Building regulations state that a home heating system should have separate heating zone controls and there should be an interlock on the...

Nothing should change, but just for more info close off a couple of radiators closest to the boiler. Remember how much you have to turn them so you can set them back again. If this makes the last radiator heat up properly then something has slightly reduced your pressure or flow. Might not be...

Most combis have a feature that internally keeps hot ready to provide hot water more quickly. In most designs this simply keeps the internal water loop that runs through the plate exchanger hot. It isn't a reservoir of hot water that will run instantly to your tap, but it does mean that cold...