scottishjohn

only one i have seen in use was in the hanibal lector film .LOl

spoke to a guy and after some grilling he told me not SAPS approved til later this year for new builds

so to take this further you are saying it is the uk produced blocks that have the problem ? I did notice in the russian videos the blocks looked very bad .LOL but maybe half the price ?

thank you have just given the evidence required from a someone who has built with them having talked to a few people and looked closely at vidoes of people building them you can see the variation in width couple that with info from a builder who has used them more than once who also mentioned same thing but up to 5mm difference ,without any prompting . no one mentioned to me that length or height were also variable --so i take on what you say It is enough to make me think it is a slightly annoying problem that is a continuing issue.. not a problem to someone going to hard render outside or inside --you can have one side happy the move to exterior cladding now is something they did not see when they were first designed 40years ago ? "time to their shit together" for the modern millimetre perfect house not a problem with other blocks --why theirs? I have 2 durisol blocks and I submerged one for a week in water -measured it -no change --dryed it out --still no change so nothing wrong with the blocks --just need to be finally trimmed at factory to be consistent in size would i use them ?-- IF price was right eg cheaper than the alternatives by a margin --yes and would get round problem

If we believe the hype then graphene is far more efficient then any other type of heating film will see what they have to say . what dif in price between suspended floor and big thick slab and insulated raft? could be just strip foundations then ?

could be a good solution for off grid with loads of PV and battery storage + suspended wood floors etc . will be very controllable ,quick to change temp + simple to install ,no plant room required I will send them an email and find out costs just out of interest and see how it compares in initial costs to ashp wet system

I was more thinking about the accidental cricket ball that no one owns up to hitting or throwing

https://eaglerenewablesukltd.com/nexgen-heating any body looked at these for using your PV work on 24v .

the general concenus is that durisol works fine -but make sure you decide which side of the wall you want flat --as they are not very dimensionally accurate in the width fine for height +length --but you choose which side you want flat if cladding then it will be the outside as hard plastering on inside will take out any differences Isotex would seem to be much better in that respect ,but you will see when you visit both

think you would have to tell your insurance co that you had them fitted at that price and wait for poke in the eye with the burnt stick when they say how much your premium is going up by

no

absolutly agree , but that in most cases is down to the operator not setting it up correctly or no baro /air temp correction in the software for the dyno, or not running on light load for enough time to warm up dif+g/box.and many dynos have very poor cooling fans and of course if you were on carbs ,not injection difference would be very noticable ,as no corrections for air +baro possible .std fan that they supplied with dynos were always only meant for quick run up not constant load for mapping an ecu in 256 spots to get repeatable results you need to keep everything the same as is humanly possible . i built mine more as a poor mans test cell with 7.5Kw 3phase furnace fan sat in front of car as well as cooling extractor fans on dyno retarder unit as well as another air extract fan for the whole cell +exhaust extract . there is a lot of heat in a dyno cell to get rid of you would not want to stand outside the car for long with a 60mph wind from furnace fan It was done So I could acurately check the mods we made to our own race car were actually an improvement ,running 1300c class -every bhp was worth the work to find it result 3 years in a row we won the scottish saloon car championship and 2 years the scottish sprint championship with our citreon 1294cc AX sport and also won our class in the 6 hour birkett relay race with 2 other ax,s at snetterton I did this very early on as i found you could not do continuous mapping because of the air temp and engine water temps rocketing and making a nonsense of the map you were writing even with air temp and baro corrections if it was injection early days you had to write ,then burn a chip -then carry on -- which is also why on most maps only a small portion was actually mapped rest was entered manually . for club race cars etc most did not need or want to pay for a full map but for road use then you have a lot more work to do the advent of cheap wide band lambda sensors etc and ecus that you could write directly too changed it for the better ,then being able to enter target lambda maps made it even easier . as you could drive it on rollers -then download the corrections the lambda had logged for partial throttle settings ,then not much time spent for WOT mapping --lot easier on the engine as well

maybe there are pollutants that are displacing oxygen in cities - I cannot say for sure but i can say for sure that the same car dynoed in the city will showmore power when same test @same ambient temp / baro pressure is done on a dyno of the same make outside a city . this discussion started regarding MVHR+air quality + need for it if occupants open windows on a daily basis, as my wife will do no matter if MVHR is fitted or not ,and for sure air quality is very much better outside major conurbations . it is strange that all air quality survey equipment -which you can get live data from show neither co2 or o2 contents,especially when the big cry about saving the planet is about lowering co2 (extraordinary claims ) --Not calling me a liar? - i am reporting what was observed on lots of occasions that's all

the chances of getting same constant error on 4 different units indifferent locations is very small ,and never did the country analysers show lower than city ones

accepted but on multiple visits over a period of a few years the same differences were seen every time

I cannot make comment on your quote ,or if you are really comparing like with like post up a copy of itemised quote ,then we can see who to avoid . nick from wales --would the man to give a balanced view on this could it be they sussed you out and it was "bugger off quote"

ASHP is definately the way to go I changed my heat source in an old 1970,sTF house I had already retro fitted UFH so all i changed was the heat source from lpg to ASHP result-house temp --just the same ,but running costs over £1000 a year savings going from lpg to ASHP dumped a £1500 lpg bill +electric went up by about £500 yes mains gas is cheaper than LPG -- by getting my EPC done for the rhi before i did all my insulation upgrades i got a very good grant -about £7k over the life of the grant --so it has ,or is paying for most of the work to change regarding MCS installation costs or indeed any contractor costs have you seen what an employer has to pay now!!! --its very expensive to employ staff maternity ,paternity ,pension contributions , etc etc even the "tea boy " needs £400 a week +NHI+pension costs -so it will be closer to £500 the employer spends you get £9 an hour for stacking shelfs in ALDI so don,t be too hard on contractors they not making that much of a killing lets face it thats where the major savings are in self build --labour costs but yes AHSP all the way not GSHP too expensive -not needed in this climate PV is a personal choice --not an economical return on investment now --IMHO

over heating basement ? not convinced there would be a problem in basement that's why wine cellars are in the basement -the ground around it keeps temp much more stable and you could always insulate under side of floor above to keep heat from radiating downwards

there is no calibration gas cylinder attached all the time , the service engineer brings that twice a year when he does his calibration tests ,used to be 4 times a year ,until they proved it was over kill

which is why 4gas analaiser do an auto re-calibrate every now and then when left turned on -you can hear the flow pump speed up when it does it

It really quite simple you can only have 100% of anything ,so if there are greater percentages of some gases there must be less of others

you say "suggest" like i,m making it up. i have reported what i have seen on different 4 gas analyisers in multiple locations I've spent 40 years + building and tuning race car engines been fitting stand alones ecus since 1992 building super charged race enignes since Rotrex came to this country in 1998 I know what i,m talking about when it comes to internal combustion engines and what effects their performance and how atmospheric conditions effect dyno results I also have over 300 hours logged flying home builts and other piston engined aircraft ,

it will probably be a local effect of city pollution on the air, alot of the polllutants are heavier than oxygen and probably are displacing it to a higher altitude. I really have no idea -as its something I could not do anything about ,so pointless to think to much about it with what i was doing ,enough other variables to contend with when tuning performance engines or fitting total stand alone ecu systems. so yes all modern ecus systems use air density and air temp to adjust fuelling to get best performance/emission control ,they do this in real time and also when you stop It will make adjustments to base ecu map adding the corrections it has had to make while you were running ,so when you start it will work from the last base map + that days corrections example --you are in south africa at coast then drive to up table top mountain and stop -it will recalibrate ecu settings as though that 6000ft was sea level for next time you start up . this is a simplification of what happens every day you drive a modern car . all that whirring noise you sometimes hear after you turned it off is it checking sensors and calibrating them for next start

I,m not talking about air density but the amount of burnable oxygen ,which does effect power i don't really want to start giving you lessons on the internal combustion engine and the ideal air fuel ratio for best power or economy just accept that more oxygen means more of a bang and more power by the fact that you can add more fuel to burn to keep the air fuel ratio correct . on n/a engines max power is usually attained at around 13-1 air fuel mix on a modern 4 valve engine -older 2 valve types could be more like 12-1 I have no experience of jet aircraft only piston engined ones - and max engine performance on a piston aircraft will be at sea level it declines as you go higher due to the thinning of the air --and above 8000ft you will start to see a performance drop , from 5000 ft you normally start to lean off the mixture because of the lack of oxygen in the the thinner air makes it run rich and is neither good for power or the life of the engine temp will also compound this . this is getting way off the topic

no these machines are self calibrating every time you switch them on .has to be accurate for the emission test for the MOT . the oxygen sensor is a part that is changed regularly , if it needs it when the machine is serviced so yes there is that much difference in air quality due to pollution between city and countryside wonder how low it is in inner london !! its not as though i have seen it just the one time but when i was going around tuning cars for other people i would always look,as it also effected the bhp an engine could develop and accounted for some of the variance in test readings from different dyno,s ,that and inlet air temps and amount of wheelspin during the test . air temp would be the biggest factor if dyno was calibrated correctly . raise inlet temp by 10c and you loose 3% of power --by pure physics ,in real world it is always more probably more like 5%--so keeping inlet temps low is always good for power I never got to find an actual figure i could quote for less oxygen in atmosphere not something i could change ,but I know cold day and tested in countryside dyno was always good for big power output