SteamyTea

I have recently been wasting time in High Wycombe General Hospital. I have noticed in Wards 8&9 that the walls are very warm. This is only the part below the windows. Halfway along each wall is a portable A/C unit that is very noisy. Even opening the windows necessatates the A/C running. So they must be extremely efficient.

Post it up then, make sure you compare them fairly though. Needs to be PPP per person.

Not for too much longer, we are electrifying our personal transport. Going to be fun watching a cyclist try and out accelerate someone in a second hand Model 3. I am all for separating cyclists, scooter users and pedestrians from the main part of a road. Seems they are as well, why they use footpaths.

They have different words because they are different things. If you think they are the same thing, come down to Cornwall, with its very mild climate, lay on the beach, while enjoy the effects of a gentle force 10 storm. You will be washed away fairly fast, but no worry, we will not have to listen to you say 'climate and weather are the same thing'.

I am about to drive 300 miles. Have been doing a 600 mile round trip every weekend for weeks now. Drive up, look at it, if it seems pristine, get it. It is one less thing to worry about.

Luckily no plumbers have replied. They woul be getting you to change it to a posh UVC, with dozens of wires, pipes and valves.

It will hold the larger parts and increase the time until they fall from seconds to hours. It is why film was fitted to the glass in Docklands after the IRA bombings. But if you are so worried, why fit this design of skylight. Or you could fit wired glass.

If rain water can fall onto the radiator, then the chances of frosting up are significantly increased. Liquid water, at 0.01°C takes 4.2174 kJ.kg-1.K-1 and then 334 kJ.kg-1 to turn to ice. Gaseous water takes 227.2 kJ.kg-1. So water only takes 338 kJ.kg-1 to turn to ice. Water vapour takes 565 kJ.kg-1 to turn to ice. So at a fixed energy extraction, you can run the ASHP for almost 70% longer if no liquid water is hitting the radiator.

The way I understand it is that toughened glass can take a greater impact before failure, then the laminated catches the pieces.

I think PHPP incorporates solar gain, and is pretty accurate, so should be fine.

I am in Cornwall, we don't have extreme heat, or cold. Just wind and rain. Get a proper thermal model done.

Possibly as the pipe volume will be quite small. A buffer will only stop short cycling if the boiler is too large for the flow volume. If you disconnect the ground floor, you are making that volume even smaller. You really need to seek legal advice on this. Just to clarify as cross posted with @ProDave A buffer will not help with the ground floor heat loss. What they have done is basically bury a large radiator in your garden.

The UK has a SW prevailing wind, this is a warm wind. I look forward to a proper winter storm, it heats the house up. It is those NE upcountry winds that cause us trouble down here.

Yes. The easiest solution will be to put some radiators back in the ground floor, but that defeats the whole object really. I bet this was not a cheap system.

If you plot imported energy usage against temperature, you will see where the the line intersects the y-axis. That is your non heating electrical usage (roughly).

The solution is to sue the installer.

If you have 150mm of concrete in total under the pipes, and no insulation, then? A quick calculation suggested that you are loosing 150 kWh.day-1 though the floor.

That will not be where the problem is. The problem area will be the ground floor and the ground. Is the ground floor about 50 m2?

Where is the insulation?

You work out the energy installed in the buffer, and divide it by the power the heating system is taking. So you will have ~ 3 kWh of usable energy stored. If your heating is drawing 6 kW, then: 3 [kWh] / 6 [kW] = 0.5 h Half an hour. But if your UFH system only has insulation to refurbishment building regs (around 70mm), then you will be loosing heat to the ground. If the thermal conductivity of the material is k = 0.03 W.m-1.K-1 The U-Value will be around 0.4 W.m-2.K-1 So if your UFH has a mean temperature of 35°C, and the ground temperature is around 8°C, then you are loosing almost 12 W.m2. If you run the heating for 10 hours a day, that will be 0.12 kWk.m-2.day-1. Now as you have almost 100 m2, that will be 12 kWh.day-1 (ish)

Not sure what you mean. But you need to use the mean flow temperature of the UFH system as the floor temperature and use 8°C for the ground. So your delta T may be around 30 K, rather than 12 K for a radiator central heating system. This is what a lot more floor insulation is needed than building regs suggest.

As much as I hate suggesting it, how about 2 combi boilers?

Only thing I noticed, is that the black wire hanging loose?

Turn it down till you are not happy, nothing to worry about. Most dishwashers take a cold feed only, some older ones may take a hot feed. Same with washing machines.

Some trees may counteract this, they can shield in the spring, summer and autumn, but allow light though in winter. As long as they are not evergreens.