SteamyTea

I had no problem setting up one. Just made a bit of headed paper up. Screwfix accepted my Part P certificate as proof. I have found in the past, B&Q are not bad for price. But the art of buying has changed now, bit of organisation and you buy online. All this nonsense about 'needing' something at short notice is just lack of planning. If a restaurant was run like a building site, you would be waiting 3 hours to get a burger as the 'lad' has popped down to Morrisons to get a lettuce.

Isn't that when the MVHR, air flow meter comes in handy. On the rig @joe90's the guy blocked off holes, of known area, to settle the fan speed. Measuring the airflow through the holes would give the volume. A few hours testing and for any given fan speed and pressure difference, a chart could be made up.

Probably around £250. I think that is what the guy that did @joe90 said he charged. Or make your own test rig.

I do a few shows each year, so took out insurance. This covers us in any location and does the normal £5mill cover. It costs £75 last year. Now considering 50 of that goes to the broker, and there are not that many people doing our dirt if shows compared to say car drivers or companies, it shows that the risk us so low as to not really worth bothering about. My car insurance has reduced this year.

That will be 1/2 mill in Roman Catholic. 40 years after starting my apprenticeship (toolmaking), I was wandering around the craft centre at my local college and some poor boy was hand filing a block of steel. I think the reason they make/made us do this is because there are better ways of getting things done. Can you imagine what it would cost to just get door hinges made by hand, let alone a car body panel. When I see the words 'Artisan', I always think that I prefer training, skill, expertise and professionalism, especially if food is involved.

Probably because women, small children and animals may be upset. Really, all that is needed, is one rule. No Dickheads

But we kill very few construction workers these days. My 'bad landlord' neighbour had scaffolding up for 3 weeks, no tag. He left the old roof tiles and other shit in the neighbour's garden, it is still there after 6 weeks. So I am all for a bit of HSE. (I am the mug that deals with it at work. Not really that hard it time consuming, though I do have a well educated and intelligent workforce)

Amazing just how much we knew we needed to do, not that 30 years ago was that long. Shame that the truth is that we now have more gadgets and don't really bother to understand the simple and very basic systems we have.

Tried to open the link and hot told that it is an insecure and unsupported protocol or something.

I am not sure I understand the rational of that. Maybe if you look at losses, as a percentage, then it may look like it is pointless. But if you look at absolute losses from each component, then you get a different story, especially if you assign a cash price to them. So say you loose £1000/year via air losses, but £8000/year via fabric losses, then it may seem that reducing air losses to £100 is pretty pointless. But it is still £900/year. Over, at the other place, there is a chap called PaulfromMontreal. He has a relatively high fabric losses, but very good airtighness. This has drastically reduced his energy usage.

@joe90 I think your site is an exception as it is so very flat. Not sure how this affects the flow, but I suspect that most of the rain that falls on your place stays put initially. Unlike the A30 earlier which has a new brown river flowing across it

I thought I would look at my particulate logger which I am playing about with. Yesterday was very windy, even though my house is pretty airtight, I notice that the readings tracked the windspeed, even the lull as the storm moved East.

Those choices are not colours, they are words.

This can be an indicator to a fairly airtight building. I get condensation on my windows after I have used the shower, never happened before I improved the place. Using heating degree days can useful to gauging how effective the MVHR is. Just a case of measuring temperature differences and energy usage with the MVHR on and off. Kind of thing that is worth doing when you go away for a week.

Have you look at the times when you are heating? (and maybe cooling) Or are you assuming that anything below a fixed external temperature is a heating time? (just about to turn my heating off as it has gone above 10°C)

I was tempted to put a smart speaker in my bedroom. Then realised that nothing happens there. Could make up stories to tell it, then see what they try to sell me.

Is it just no good, or a scam, as in never delivered.

That will be 16 standards then

Will make your tea and porridge taste funny as well.

You don't normally drink from the loft header tank though.

I agree, but it is free and a useful bit of software. What are those equations, be a useful thing to have in the arsenal.

Doesn't this sort of problem need many different solutions. So sound reduction, sound deflection, sound absorption, vibration reduction or isolation etc. I have used an FE program called LISA to do some thermal modelling, it also does acoustic modelling. https://lisafea.com/

Probably around 10% of the motor power, but you could put in some cooling pipes. Is it actually the motor, or the fan that is making the noise. The extractor fan at our place is noisy, but not as noisy as the the air intakes, and they have baffles in them. Is a good program. There was this in my favourite comic almost 18 years ago, I still think it was an early April Fools though. https://www.newscientist.com/article/mg17323354-500-sculpted-sound/