PeterW

Does anyone know if they include integral garages in the floor area calculations ..?? Isn't there something about space less than 1.2m high too.?

It doesn’t need to be thick - it just needs to keep the steel at a temperature close to the incoming or outgoing air. You may find the duct is actually made of polystyrene - certainly has that look about it. It’s pretty strong as long as you don’t hit it ..!

Can’t tee off those copper tails with a saddle valve as they aren’t hardened copper - they are annealed to allow them to bend to the bottom of a mixer tap and will most likely just bend or crush when you try and pierce the pipe. There is a compression join though so they must connect to something else - is that copper too..?? It may just be simpler to replace the compression coupler with a tee or even a tee valve - what’s the connection to the filter ..?

Just checked this and its not "free" as it has a marked increase in standing charge.... Ebico Night Owl Day unit rate 16.7872p per kWh Night unit rate 0.0000p per kWh Standing charge 51.48p per day Ebico Prime 18 Fixed Day unit rate 16.4676p per kWh Night unit rate 8.9236p per kWh Standing charge 21.99p per day So whilst the concept is interesting, the economic only stack up if you can put some considerable heat into the slab such as the way that @TerryE is doing. Looks like a candidate for 00:30-02:30 on ASHP DHW, followed by 02:30 to 07:00 with the space heating, kicking the immersion in for the last hour or so to get DHW up past 65c for the start of the day.

Optima is a brand they use for other items including bathroom furniture - it’s been around quite a while and it’s pretty good quality. I’ll be ordering soon - they are really helpful. The planner though is not available online unless you know where to look but it’s very resource hungry with video rendering making PCs work really hard !!

Looks like a McDonald Engineering TS. Black thing is an expansion to allow the coil water to expand.

Have done .... and they leak ..!

Nice tidy site and blockwork looks good too.

Ha ha ha ..!! I bet that was fitted to the boiler and the last bloke removed it .....

Now unless I am going blind ... where is the TS and Boiler on that plan ..??!

Right that’s sorted my dilemma then and I will fit another filter ..! May have to be in a custom housing though as I can’t get another filter box in I don’t think.

Semi flex is good Semiflex

Ok ...... so any penetrations in it at all ..??

SunnyBoys are expensive ..!!! I can get micro inverters for about £60 IIRC which makes a panel about £140 plus mounts. @divorcingjack if you can make an “upstand” of about 200mm cube in the centre of the roof then you’ve got an easy access for any system coming in and out of the deck. With an overhang you can use IP65 inline connectors and joint them in the roof void and then it’s as per @JSHarris with an isolator, RCBO and generation meter.

Black tape ..??

It is fixed speed - need to dig the volumes out. I may put a pleated filter into the front of the extract box just to balance the flows.

Can you point it at the pipe coming out of the boiler ..?? I have a suspicion ....

That was my other plan - just concerns that the filter will absorb the moisture in the air from the extract side.

Given the fact the Mitsubishi units are vastly over powered for a house, I’m hoping (!!) it will give some welcome resistance to the inlet ..! The downside is that there is no ability to tune the inlet and outlet fans independently so I will probably end up with an adjustable iris on the extract to throttle the flow.

Thanks for that ! So Golden Brick is not just that, it’s the warranty provider too... do they also insist on the BRegs provider..??

Errr ... it’s a mix of both ..!! This is the filter box This is the G4 This is the carbon filter I will use some 10mm angle to create the slot for the filter pair which will be hopefully an airtight fit and ensure that both the dust and smaller stuff is kept out.

I’m adding a 300mm square filter unit to the side of the MVHR that is 100mm thick. It will contain a 45mm G7 filter and a 25mm carbon filter so that leaves 15mm either side to allow for better air flow. Filters are cheap - I plan to swap every 6 months which I don’t think is an unreasonable cost for filtered fresh air....

Right so a 400 litre UVC sounds like a plan ... What is your heat requirement as that will also dictate the buffer size...? You may get away with a 12kw or 15kw boiler but @Nickfromwales can comment further...

A TS can give full pressure hot water as either it uses a PHE or a heat coil. The downside is the losses as they run considerably hotter and go cold quicker so they overheat a well insulated house and also may not service multiple high flow showers.

This is where I think this may start to creak as there are plenty of parties who will be looking to offload their liability ..! I would be interested to see what options are available for the founds / slab such as passive, underfloor heating, ICF or other systems or if it’s just beam and block to minimum BRegs and a standard trenchfill foundation. Do you know @RandAbuild if the specs are published as I couldn’t find them ..?