Marvin

Your right. 7kwh. I'll try to be more of a pedant in the future....

This is a bit misleading. We heated the 200 litre hot water tank and the heat from that leaks into the building, as do many other devices in the bungalow. But the point I was trying to make was that as a result of the work to improve the thermal efficiency and air tightness we now need a lot less additional heat; we used about 7kw for the 24 hour period (I have a meter on the power for the ASHP), and that an EPC doesn't necessary reflect the real picture on heating a home.

Hi SBMS Having renovated our bungalow 4 years ago and installing an LPG boiler at the time, and then converting to an ASHP this year, I would say that if you are going to "leave the door open" for a future ASHP you'd better do a dummy run of the requirements before hand and prepare, because retro fitting one through your new building could be a right pain in the backside. @joth is of course completely right. Your only fighting to keep the heat in. If the building is resistant enough you can get away with very little heat. The additional cost of insulation and airtightness versus the cost of installing and running heating means that as my brother says either way you pay. But the difference is if you stay to reap the rewards. The ASHP, MVHR, PV and EV combo suits us.

We spent £500ish a (6 bottles) year for heating and hot water, easily measured each year for 3 years. But now we have an ASHP, and I would not change back. The PV, ASHP, MVHR and electric vehicle combo works for us. Its especially good on the heating because the ASHP runs at a low level in the background. The boiler needed 60C ish to run at best efficiency and so when the heating came on we got over heating as the TRV take about 20 mins to respond and the rads were full of 60C water which is an overkill in our home

It was a while ago, but it did include the heating of the 200 litre tank of hot water.. Our LPG was £85 a bottle...

Yes. Out side air tempreture. Bit damp, cloudy, fairly light wind. Not bad for the Isle of Wight, in December. Oh and internal temperature about 22C.

The assessment score was discussed at great length. As soon as you mention LPG 47kg bottled gas you've had it. Worse than electric heaters as far as EPC concerned. As for the thermal efficency, I think I wrote it up in my blog, but basically anything higher than about 8C and no heating required. Today no heating from 8am until 7pm and temp today about 8C.

It has not been assessed because it was neither a conversion or new build but we had to have an EPC for the ASHP and PV. Needless to say the EPC failed the government PV scheme.

Partially, the shape makes a difference the nearer to a cube the better result (or a globe if you want to be padantic). But the calculations are based on many items including method of heating. We installed 200mm rigid insulation in the floor, 150 in the walls and 400 fluffy in the loft and a MVHR but had a very low rating because we had to use bottled gas for heating and hot water. Result EPC an F.

And the roof...

Lots to consider.. Top square in front of door 1200 by 1200mm, but off set so wheelchair user can reach lock. edging to stop wheelchair rolling off and handrail. Ramp design depends on the height difference between the level access at the door and where the ramp terminates and how long the ramp will need to be. If it is very steep then the design will change. AND everything else I have got wrong or omitted, which someone will correct me on...

Sorry that you haven't found enough info. Does this help? https://www.oxfordshire.gov.uk/sites/default/files/file/adult-social-and-health-care/part1accessibilitybydesign.pdf Marvin

Yes, @ProDavethere's one of those too: Apparently the cat is not wired to the lights: I used a flash.

Quite right,.

You could read the info as it discusses buffer tank sizes and I think hot water tank sizes as well.

Quite right. But hopefully you'll read the info about the effects of the volume of water and modulation.... Good luck. Marvin

Always best to time how long it takes to fill a bucket and measure out the contents in litres. This gives you a better indication of your flow rate.

I used 11mm OSB behind my plasterboard in the kitchen and all units fixed fine. Unless you have something very demanding if your using 11mm OSB should easily be OK.

Plus 1 Typical low flow shower 12 litres per minute. How do you cope??? As for upgrading the mains... it depends what is in it. You have the flow and the pressure. If you increased the size of your supply pipe to your home the flow could increase if the pipe restricted the flow. However, it would not increase the pressure as this is controlled by the water company supplying the water in your area. I would suggest contacting your water company to ask them about what could work for your home. ( it could be you are a very long way away from a main...) Secondly I would ask your neighbours what sort of set up they have. (i.e. are you the only one with a poor flow rate). Good luck. Marvin

Try reading pages 61,62 and 68 for info. https://forum.buildhub.org.uk/applications/core/interface/file/attachment.php?id=50188

For me, this is a little confusing. Low loss headers will, as I understand it, allow circulation of the water even when the radiators have turned themselves off (assuming thermostatic radiator valves are used) however, modulation as I understand it, is the turning on and off of the heating (in this case) to meet demand. It is known that an air to water ASHP should run for at least 10 minutes before stopping to achieve the best COP result. Having an ASHP and radiators myself I was advised that the water in the buffer tank adds to the system volume thereby acting as a storage so when the cold water returning from the radiators is added the buffer water temperature slowly lowers delaying the ASHP kicking in. Like wise having the buffer means that heating up requires longer therefore aiding the COP.

How many chimneys does the cottage have?

Yes, they are due round. Paid my £360 for that. Positions of isolators as submitted in application....

I think I will label that up to remind me. Its always months/ years later that you come back to do something...

Yes the maximum the inverter will take. It also allows room for me to fix extra panels to the chimney..