SteamyTea

There is quite a bit to unpick here. If you are having underfloor heating installed, you can use that for some cooling if it is attached to a heat pump. Just make sure that there is as much insulation under the pipework as possible. Maybe 300mm or more. MVHR will only allow a relatively small amount of heating/cooling with standard size ductwork. And then you need heating/cooling elements designed into the system. MVHR is not designed as a heating/cooling system and should not really be thought of as such. As you intend to add extra insulation, this will also help with any overheating problems, which to be quite honest in the UK, are only a few days a year. If the overheating is more upstairs than downstairs, adding PV to your roof may help as that converts some of the infrared radiation from the sun to electricity, approximately 15% less energy will work its way into the roof. Positioning of cooling vents/units is really down to looks, but cold air falls, so can be fitted high up. Noise is probably the biggest problem. Though modern systems are quite quiet these days. If the overheating is caused by sunlight, rather than ambient temperature, consider window blinds or reflective coating on the glazing. You may find that it is SE and SW facing glazing that is causing the problem more than South facing (the sun is higher in the sky during the summer and this reduces the input).

Not a lot to add to that, except as it was for a swimming pool, is there any corrosion.

Then you will have to do it to make it truely authentic.

No idea. They have been around for decades though.

What, the guy's wife?

How about a PIC, I think they are fast.

Right on me bird. Get a Pi up and running, the rest is easy to talk though. Then download those 3 utilities I suggested. Make a desktop folder and copy the files into them. Then follow instructions.

Obviously

I would not worry about that for what you want to do. Write the script and run it, the RPi will decide the rest. Have you downloaded PuTTY yet? https://portableapps.com/apps/internet/putty_portable and WinSCP https://portableapps.com/apps/internet/winscp_portable You can use them to log into just about anything on your existing network if you now the IP address, user name and password. Because Linux is a secure system, learn about permissions. If these are set wrong it can be hard to move things about. It is easy to change though. In PuTTY you log in, then use "sudo", at the beginning of what ever you want to do, this gives you root privileges. Then change the permissions on the files/folders you want to play with. So something like this. sudo chmod 755 /home/pi/temperatures/temperaturescript.py datafile.csv Then you can easily run the script and read or move the data file. The other thing is if you are using the PC to display the readings in PuTTY, it will keep going until you either shut PuTTY down, or stop the python script with Ctrl+C. You can make the script run in the background by using a "&" after the script you want to run (may be two &, so &&, I can never remember, someone else will be along to remind me). Harder to stop the script, I pull the plug on it. I find it easier to write the script on the PC (I use EditPad Lite https://pendriveapps.com/editpad-lite-portable-text-editor/) and then just drag the file to the appropriate folder on the RPI using WinSCP. Just make sure that the script is not running otherwise any changes will not happen until it is restarted. If there is an error in the script, the line number, and some basic info, will be shown in the PuTTy screen. And remember to either be in the correct folder for what you want to do, or use the full path. So if you are in /home/pi but your python script is in /home/pi/temperatures either type: python /home/pi/temperatures/temperaturescript.py or change folder with cd temperatures then type python termperaturescript.py (if you insist on using Python3 then just type python3 temperaturescrip.py) ls shows the contents of a folder. That is elle ess not eye ess or one ess) First things first though, get an RPi set up so that you can SSH into it, you have to change a file via sudo raspi-config. This can be done manually on a PC, just create a file and name it ssh in the /boot directory of the PRi file system. No extension and nothing in it. Or you can manually edit the /boot/config.txt file by putting in enable_uart=1 at the end of the file. That config.txt file basically holds the information about what you want to use the RPi for, so it will have lines in it that refer to the 1Wire stuff, any real time clocks and so forth. Probably easier to initially add a keyboard, mouse and monitor and use the raspi-config though. Just a drop down menu that you can work your way though, including changing the password, setting up the wi-fi, enabling the 1Wire, the shh and so on. I have no idea how much egg sucking I am telling Granny here)

Most Sunday mornings last year someone used to drive his McLaren around Penzance (one of the poorest places in the UK). He used to turn it around in by the Chapel Street COOP. Just to upset all us poor people. Lots of noise from the car, lots of clasped hand movements from the public. Not seen him this year.

Never tried the other OS options for the RPi, but some may be quicker startup than the others. "There's also a particular emphasis on programming. RISC OS is home to one of the best and most flexible/capable versions of BASIC (BBC BASIC 5/6), and RISC OS Direct makes it easy to start coding. Also included are many other popular programming languages such as Python, C, C++, Perl, PHP, Lua and more."

Local college that does horticulture. Students always need projects to do.

I have just reread your initial post, is it something that looks the same that Debbie likes, or does she specifically want a lump of concrete that looks like a 1950's prefabricated staircase in an inner city council built, by lowest tendered price contractor, sink estate, tower block. If that is what she is after, you will have to train the cat to wee on it.

Why concrete? Why not just make it in timber.

Then a very large solar array on the garage roof to power it.

May struggle with a carbon composite car. And oil changes are 20th century. Fantasy cars are electric, powered by a secret technology developed by self taught engineers, made from old tin foil and coke cans, with all the profits being funnelled back to the Rothschild. Hell, I thought you would know all about that being an economics expert.

Does this help. https://www.engineeringtoolbox.com/heat-emission-radiators-d_272.html

Plasters job to get the plaster smooth. Chippys job to make sure things fit correctly and are finished. Painters job to change the colour scheme, but not choose it.

Yes, apparently so, not looked at the figures for temperatures and humidity, which are the things that affect ASHPs the most.

I don't think there is a 1Wire sensor that goes that high, more usual to use a thermocouple, and then you are into ADC and extra hardware. I don't understand software, but I think that with Python, it is normal to write little scripts that spew out just the information you want either to a file or a display. Our mate Ed Davies is the Python man, may be worth giving him a shout by email. You get the sensor number by initially interrogating it from the terminal. Everything in Linux is a file, so it shows up as a file. /sys/bus/1w/devices Bit of a faff initially, but easier than writing something to automatically find it. There is OWFS that I think connects the DS18b20 via the USB port and does a lot of the hard work. I think TerryE knows about these. The DS18b20 are, when working at the extreme ends of there temp scale i.e over about 70°C a bit flakey, so you need to keep an eye on that and reject false readings. To give you an idea, I have some stuck in the ground and out of 87750 readings, 40 are false. Not bad, but that is working within the normal range i.e. 0°C to 30°C.

Just goes to show that oversizing really does help to keep the CoP high. 330 m2 is larger than the 6 houses that make up my street. You must have one of the posh houses in you village. Had the weather for getting a decent CoP, been dry and not silly cold.

If you are not bothered about logging the temperatures, how about ones of these: https://www.ebay.co.uk/itm/Inside-Outdoor-Home-Electronic-Hygrometer-Thermometer-Precision-Tester-x-1/174205919478 But if you really want to use a PC to display it on, then SSH (connect) to the RPi with PuTTY (the software on the PC). Your code on the RPi will look something like this: #!/usr/bin/python #imports necessary libaries import os, time, datetime #load drivers os.system('modprobe w1-gpio') os.system('modprobe w1-therm') while True: #Sort out the time format dt = datetime.datetime.now() runday = dt.day dt.day == runday #sensor 1 tfile = open("/sys/bus/w1/devices/28-030697945754/w1_slave") text1 = tfile.read() tfile.close() temperature_data1 = text1.split()[-1] temperature1 = float(temperature_data1[2:]) temperature1 = temperature1 / 1000 #opens and reads the time ts = time.time() #sets time to UTC and dd/mm/yyyy hh:mm:ss format UTC = datetime.datetime.utcfromtimestamp(ts).strftime('%d/%m/%Y %H:%M:%S') logfile = '/home/pi/monitoring/data/temperatures/1wire-%s-%s-%s.csv' % (dt.day, dt.month, dt.year) #creates and opens or appends data to file tfile = open(logfile, "a") #writes to data file tfile.write("%s"%UTC + ",%s"%temperature1 + '\n') #closes data file tfile.close print (temperature1) #sleeps for (n) seconds until next reading time.sleep(29) The "28-030697945754" is the sensor number and will have to be changed to whatever sensor number you need.

That is a ridiculously low CoP.

That is quiet an impressive CoP. How much oversized is your ASHP?

I don't understand the differences. Generally as ASHP will run with a CoP of 2.8. So 31 kWh/m2.year X 190m2 = 5893 kWh/year 5893 [kWh/year] / 2.8 [CoP] = 2104 kWh/year (this is the electricity consumption for the same thermal output) It is kWh, not KwH, or KWH, or kwh, or kw/h