Marvin

We have a Cool Energy InverTech Air Source Heat Pump | CE-iVT9 4.3kW-9.5kW. We have had a DC Bus Overvoltage fault come up. Running since June 2021, its our first hiccup. The result was that the pump was on but not the compressor or the fan. We managed to turn everything off and turn it all back on and it fired up as per normal. However, in case it happens again does anyone know what might have caused this to happen? Regards Marvin

I am about to insulate a wall. I am comparing Jablite (not basic polystyrene) to PIR board. I can make the wall thicker when using Jablite rather than PIR so thickness is no problem. It will not face compressive forces so no compressive strength issues. The cost seems to be about half. Both products seem to be combustible. If I understand it right, PIR encapsulates a gas which leaks out over time eventually reducing the product to the same u-value as Polystyrene. Why shouldn't I use Jablite?

Hi @Beelbeebub Interesting.... so... ASHPs Can already give the COP results. I think what's needed is a management system in the ASHP that the installer can input all the info from an ASHP building installation survey and then the ASHP would calculate what the COP SCOP should be and learn by results what the best setup would be. However this would need a lot of internal and external sensors to achieve.

Been there. Done that: About 120 square meter building: Smoke detector in porch(through door to) smoke detector in lounge(through door to) heat detector in kitchen, and smoke detector in upstairs landing connected by open stairway from the lounge with the smoke detector all interlinked.

Here the most productive angle in winter is about 70 degrees. However as the sun adjusts every day its forever changing.

One has to wonder how countries like Norway cope with so many ASHP's! It has to be because of their positive approach for over 50 years of introduction and their well insulated and air tight houses!

Hi @styleruk In my experience it is very risky to drill holes through the concrete posts as they have reinforcement in them and drilling can cause them to crack! This is especially so if the post is already concreted into the ground! Some posts have predrilled holes for wires through the recessed bit hidden by the panels... I used Postfix® Slotted Concrete Fence Post Brackets to Fit 4" x 5" to avoid drilling. They may not be strong enough for what you want but may give you an idea... Good luck Marvin

I think it's also what people are accustom to and expecting. We now have an expectation of instant results in life! Light on. Kettle on. phone on. computer on. Heating what?!

This is the whole point that lots of people don't understand. Low (low water temperature) and slow (slowly warming up the building) the way to go(most efficient and therefore least expensive way to heat the home)!

Yes. Combi boilers are usually sized according to the hot water demand not the building heat demand.

"IF its designed correctly, then i will be warm." Er... if the building has the designed thermal resistance and air tightness......

Further developments in ASHPs Higher output temperatures and greater efficiency achieved using new refrigerants. https://www.bbc.co.uk/news/business-67511954

Depends if its snowing or the house is on fire.

Hi @ProDave Further to my PM: https://www.telegraph.co.uk/money/investing/cant-touch-300000-broker-shut-down/ Be warned.

It is only the condensate from indoor air, so not corrosive. No more so than the moisture on windows. Ours produces very little

Hi @MarkW1979 Delta 30. That's the difference between the room temperature and the water temperature entering the radiator (so 20C room 50C ASHP water)

Hi @ProDave I wouldn't commit to anything too costly at the moment. Locking some spare cash into 5% interest will give you less grief. I have had clients with 2 homes and its nothing but a pain in the long run. (One couple with a house in France and they got a call at 2 in the morning to say that the roof had blown off) I would really recommend watching the following: Good luck Marvin

Hi @AndrewR I do not know the official requirement but I would have a fuse box inside and have at least 1 lighting fuse and one ring main. I wouldn't want to be fiddling around with fuses outside in the dark in the pouring rain...... Good luck Marvin

When using the boiling tap was the building inhabited, was the room at normal household temperature...

Hi @FreddieW @ETC's layout feels better especially as it has a bathroom, and cloakroom(un labelled).

It depends on the height the units starts above the sink..... Yours looks pretty close.... Also the quooker boiling tap runs a lot higher temperature than a normal hot water tap and will produce more steam. Also the hot moist air will go into the cupboard where the cooler air will condense the moisture. Also you have no pelmet at the bottom of the wall unit which would usually deflect the passage of the steam. Usually units above a sink, when I have installed them start higher above the sink (Short units) for access and light needs. M

If the strip of land is not part of the highway who does it belong to?

Hi @FreddieW I would want a planning exemption certificate Long way from kitchen to lounge... Old bed 2 would have no windows?? 5 bedrooms and 1 bathroom? Lets hope hot curry is not on the menu.. Good luck Marvin

Hi @mid-ulster N ire If you could do a quick sketch it would help people understand...... The rules on applying for planning permission, I think, in England, have changed a little, meaning, as far as I understand, that you can only apply for planning permission on your own land or on other peoples land with the express permission from the owner/owners. (I may be corrected by someone about this) So who owns what? On the sketch please indicate exactly where and who owns what, and what items people have legal rights to access, and this may help you to understand whats what. Good luck Marvin

Our MVHR trips to battery supplied power when the mains goes off.....