PeterW

No, not irrelevant. If the temperature in the rooms measured is less than the set temperature on the controller then there is a fault with the system, and that needs to be resolved ASAP..!!! Do that, get the factual data and then move forward ..!!!!

I have Black Friday offer on and I’ll do it for £85/m and @Nickfromwales will come and mix the adhesive for me ... @nod is your man for pricing tiles but that sounds ... very expensive !!

Your founds want to be as deep as possible and it doesn’t look like on the right side over the services you will have that opportunity. Other option is to frame the opening either with steel as per @Oz07 suggestion or create a solid “U” from rebar and framed concrete that runs up the inside of the pillar. 2 bricks is about the minimum you can make a pillar - that being 2 on each side - 2 1/2 or 3 is better and also would allow you more reinforcing. Don’t underestimate the weight of gates pulling downward and twisting a post !

Only required if you don’t use breather membrane as airflow is not required otherwise.

I’m referring to the manifold actuators. Heatmiser actuators are only thermal - you can replace them with £7 ones if you don’t mind slow valve responses. Heatmiser also uses a mix of voltages too - at one point they were on 24v actuators, industry standard was 12v or 230v. They also don’t have any simple method of exposing the control functions or allowing third party integration which is what I mean by closed, so you can’t get integration to any of the HA systems.

Using Cat5 for analogue doesn’t make sense unless you have local power at the camera. You still need two cables to the camera. PoE is now pretty standard and IP cameras are significantly better than analogue.

Assume you’re referring to the Vaillant aroTherm Plus that has a pretty good range however they do lay it on a bit with the CO2 impact on losing the refrigerant to the atmosphere ..! Also forget to tell you R290 is highly flammable propane and it has a limited performance range of 0-20°C so can’t get above 60°C when the outside temperature is above 25°C. Vaillant seem to push these through their installer network - I requested the BIM files and got sent a pdf flyer and was called by an Installer instead ...!

Yep agree but a lot of the cameras come with the injector. Can always change to a 4 port PoE switch at a later date.

That insulation is there to accommodate expansion not just for thermal purposes. You need to include it.

Just 2 cameras I would be inclined to just use injectors next to the router and be done with it.

That has changed recently. The Salus auto balancing actuators are superb, as are their new wireless thermostats. Heatmiser is expensive and I’ve seen more than a few with software glitches that take the whole system out. Also, it is a closed system so if something does fail you have to buy spares from them which puts me off. Latest app updates have had some really bad reviews and they haven’t fixed a lot of the issues from the previous versions either.

Have one of the original Fein Multimaster Top from about 2008 and would fight to the death to keep it ..! Have considered the Makita as I run 18v LXT batteries but can’t currently justify a new toy ..

With PoE you get it all on one cable anyway so if you’ve got to run power then it’s as easy to either run power or Cat5.

Lots of decent POE cameras out there, only issue is getting the cable properly terminated as punch downs etc at height are no fun. Look at HikVision

Yep should just be pushed in.

Blockwork ..?? Thought this was all brick when I priced (guessed) it... 530 blocks laid plus 200 bricks below, faff with the lintels and starters (£20 each) and all the playing with block on flat, I would say that’s 2 days to set out and sort the below DPC and then 5-6 days to get it all up and tidy. £1850... and the @Russell griffiths factor added takes it back to broadly where I was before ..! ?

Yeh my OCD is twitching and like @dpmiller I would have to switch those handles over ..!! Oh, and whilst you’re at it can you rotate the top left thermostat the right way up too... ?

Max 1/3rd depth according to building control.

think that will be more down to wall mounting than anything else.

They use a standard of 3000kWh

56sqm is about 3200 bricks plus your extras. Local to me, around £2100 all in or about £38/sqm including all your fiddly bits.

No, no, yes, yes, yes, some can.... or in detail ... Noise - no worse than an oil boiler if it is a monoblock (ie all outside) and you site it so it’s not facing a window. Decent wall thickness tends to drown out sound anyway, and flexi loops in the pipes stop transference of noise via the pipework Siting - can be sited anywhere, usually ground mounted near the house as insulated underground pipe is expensive. Can be wall mounted but not usual. Airflow - they remove the heat from the air around the fan coil unit outside so can have a localised cooling effect on the air, and the fans shift a lot of air too. DHW - yes to about 50°C unless they are a high heat unit that can go to 60°C but this is easily sorted using an unvented cylinder with an immersion to boost the tank on E7. Heating - ideally tied to UFH in a decent slab thickness to act as a heat store at low flow temps Cooling - some can cool however in the U.K. it is normally disabled in the firmware as a large majority of units have been fitted under MCS / RHI rules and this doesn’t allow for cooling unless a heat meter is fitted.

Good luck. You’ll find on the warranty that “consequential damage and loss is excluded” so you have no chance of ever recovering the cost of damage to a floor covering in the event of failure. So I’ll continue to specify blending valves if it’s ok with you, and ensure that the whole heating systems are specified with the correct controls, and leave the MCS guy to spec his bit.

Which ones are they @Russell griffiths as there are a few listed ..? What power output ..?

Yes it’s a 4 way shuttle valve on the refrigerant side matched to the temperature requested by the controller which uses a motorised blending valve on the water side to set the flow temperature. I’m aware of the method of how an ASHP works, I’ve had to work on a number of different types over the last few years including Sanyo, Danfoss and Mitsubishi. What you don’t have when you rely on the ASHP controlling water flow is any safety mechanism to stop floor temperature overshoot in the event of something such as a three way valve failure - if it goes to centre position for example then the water temperature for your cylinder (55°C) will hit your slab. There is no fail safe and it’s actually poor design as you should always have pairs of controls - you only need to look at a standard UVC for example to realise there are dual failure mechanisms to stop this. MCS is irrelevant here as they only certify and design to the point of the ASHP providing a DHW and Heating source. The entire premise of MCS is that the ASHP can supply the required heat load in kWh, so the hotter the feed, the less hours required. They are not concerned with the UFH design and there is a common misconception that just dumping water from an ASHP into UFH is “fine” as it will always be below 50°C. That’s an incorrect assumption and some floor coverings have an MST (maximum surface temperature) of less than 30°C - some LVT and engineered wood requires max 28°C MST so even setting your Ecodan to its lowest flow temperature (32°C IIRC from the latest FTC 6 on an Ecodan without checking) means you’re dumping warmer water than the floor requires. Add into the mix that that in low energy houses the heat requirement is so low that you want to be using blending valves to get to 27-28°C flows, and the whole “the ASHP will do it” argument falls apart. Hence the need for a blending valve to ensure that both the floor MST isn’t breached and the heat load is properly managed. This is why systems design is so important and you get failures in heating systems where ASHP are specified without anyone actually understanding what is on the end of the pipe coming out of the zone valve ... and all for the sake of a £50 valve.