PeterW

Heat Pump software is designed for a multi region market. In a lot of countries, the hot water tanks are fed by open cistern arrangements or the tanks have air spaces directly above the water in the tank so it is possible for contamination to occur. Lack of use of chlorine in the water treatment process also means that water quality is not guaranteed so the manufacturer includes a standard weekly 65°C cycle that is designed to kill off bacteria in the tank. In the U.K., the predominant installation is one with a mains pressure unvented cylinder fed directly from a rising main. There is no air space, no ability for contamination and the water supply is chlorinated therefore the need for a legionella cycle is removed. There are no recorded cases of legionella from a domestic water supply in the past 15 years in the U.K. to my knowledge.

A plumber that can read can fit an ASHP. They are simple. I wouldn’t fit an £800 gas boiler which when you factor in flues etc will be up toward the £1000 anyway. And a comparison of a combi that will run a single shower to an ASHP and UVC set up that will run multiple mains pressure outlets is chalk and cheese.

Not really - you need the same with DHW setup on either a system boiler or an ASHP so irrelevant to include. Also neither I or the OP talked about comparing a combi with an ASHP, and tbh you’ve got an issue with flow rates anyway on combi’s so mains pressure is out of the window.

…?? like lack of functional heating ..?? ?

PoE injector ..?

I may be the wrong person to comment here as I’ve got a 50:50 opinion on architects as I’ve come across good and bad in all walks (self build, domestic and commercial) and interestingly the ones I’ve seen biggest issues with are the ones dealing with the self build market ..! I had to nearly stand between an architect and a client during a full blown argument on site when the architect was shouting that moving a door on a landing “spoiled the aesthetic he has created” despite the client realising it created a horrendous dog leg into a bedroom which would have made it virtually impossible to get furniture in or out of the room… I’ve also had some great dealings with architects who give advice and explain the reasons why - sometimes you need the emotional intelligence and empathy to understand you’re designing someone’s dream, and possibly the most expensive thing they have ever commissioned so understanding that is key. They have much more invested in the design than just money.

That means if you physically alter or change components. There is nothing to stop you changing the settings.

why not just strip it back to brick and re-point it ..? Or render with the heat proof render ..?? https://shop.vitcas.com/fr-fireplace-render.html

You can’t, just switch the WiFi off in the settings. You need the router to be the DHCP server and give everything IP addresses.

The build (latent defects) warranty should cover it. you’re overthinking this … just check the slate spec and ensure the roofer follows this.

Samsung use the same compressors as Mitsubishi - Brushless twin rotor inverter units. And Vaillant are not a premium brand ! Late to the party, and some questionable reliability.

Not wanting to rain on your parade, but your comments actually are the reason a lot of people don’t like architects - it comes as a surprise that you’re not the only ones who can draw and use a pencil …. Some people are self building because they want what they want - down to design. What you see as vanity projects may well be what they want it to look like. It may not be to your taste, but given that it is their money, why is that a problem ..?? Yes, tell them where you could improve the design but telling them their ideas are crap is not going to win you customers.

Samsung EHS 12kW is change of £2500…

Mesh is a badly worded term - they are just using a pair of WiFi channels to backhaul between the devices and the one connected to the hub. In reality, all you’re doing is spreading the traffic over the APs and allowing the APs to be further apart. The TP-Link ones are pretty good at distance all directions (through the floors etc) so if you want fire and forget they are worth a look.

RHI..?? The units are £2-4K depending on size. Cylinder is same cost whether you go gas or ASHP.

I don’t buy the ubiquiti hype and went TP-Link and their OC200 Omada hardware controller. I know I can play around with the settings etc - it’s all via the app - but being able to mix and match the APs and add them using a 3D bar code is neat. They also have full mesh roaming and you can also create stuff such as guest WiFi on the fly.

eh..?? Decent gas boiler, £1200 plus the gas pipework and about a day of a GSR to fit it so another £500. 9kW ASHP £2300 plus a day of any plumber to fit it so say £300 on top. £1700 vs £2600 is small change in a £300k build cost.

You still need the plans to build it and you get the daft details sorted when plans are created and not when you’re stood looking into a hole wondering why it all doesn’t work …

Windows have nothing to do with air tightness - they will contribute 1-2% as they have double seals etc

That is classed as a culvert and not a drain - doesn’t need any access. In fact they are better sealed so if it does overflow due to being blocked at the far end it won’t overflow into your garden. Just use a couple of 22.5° bends to get a nice long slow change in direction and concrete them in to stop them moving.

..?? How ..? ASHP can be diy install, boiler can’t be. ASHP service ..?? Blow the condenser through with an air line and check the gas pressure every 3 years - pretty easy for any refrigeration engineer.

brick and block ..? 2 storey..? Gables ..?? Square ..?

And approved contractor prices. Anglian will inspect if you don’t use their contractors but tbh from experience that’s a video walk around …!

All zone valves tend to be NC - Honeywell do an NO but it’s not the head that makes it that it is the valve body that has different stops inside it.

I wouldn’t use Wikipedia as a source of truth with a sweeping statement like that in it ! And the Horstmann ones are spring return as are most of the single zone valves. Ones that stall both ways are usually the mid position 3 way valves which are the work of the devil - I only use zone or diverter which both have spring return.