Duncan62

Ok. They loose double the amount of heat compared to the OSO, on a 300L UVC, 2.32kwh/24hrs vs 1.18kwh/24hrs Telford: https://www.tdlonline.co.uk/Heating/Hot-Water-Cylinders/Telford-Stainless-Cylinders/Telford-Tempest-Cylinders-Heat-Pump-Coil/6134-/Telford-Tempest-300-Litre-with-Heat-Pump-Coil-33sqm-TSMI300HP OSO: https://osohotwater.co.uk/product/delta-coil-dcpp/

Thank you, should have said specifically the OSO tank, as it has very low heat loss.

Who did you buy it from please? I'm after a 300L one this year.

I have this problem coming up. Never done it before. I'm thinking that I will need a X and Y measurement but also both diagonals, say A and B from each front corner - to check that it's actually square. Measure twice and maybe three times.

Did Mark install or did you DIY?

Could we get some more info on how you went about this to avoid MCS nonsense please?

Content duplication, delete

https://forum.buildhub.org.uk/topic/35099-streetfield-suds-system/?do=findComment&comment=513546 (And if you can spot the mistake in the very final calculation, you have understood it. The answer is correct but a number in the equation are not) The Building Regulations 2010 Drainage and Waste Disposal Approved Document H 2015 Edition: Section 3.27 states “Soakaways should be designed to a return period of once in ten years”. However, our LA wanted to see 1 in 100 calculations The soil infiltration rate (f) is calculated with the equation: f = Vol75-25 / ap50 x tp75-25 f: soil infiltration rate (m/s) Vol75-25: volume of water in the trial pit between 75% - 25% effective depth (m³) ap50: internal surface area of trial pit up to 50% effective depth, including the base area (m²) tp75-25: time for water to fall from 75% - 25% effective depth (secs) The storage volume should be calculated so that, over the duration of the storm, it is sufficient to contain the difference between the inflow volume and the outflow volume. The inflow volume (I) is calculated from the rainfall depth and the area drained. The outflow volume (O) is calculated from the area of the side of the storage volume when filled to 50% of its effective depth and D, the duration of the storm in minutes. Storage Volume Method The soakaway storage volume (S): S = I – O S: Soakaway storage volume (m³) I: Inflow from impermeable area drained to soakaway (m³) O: Outflow infiltrating into the soil (m³) Inflow (I): I = A x R A: Impermeable area to be drained to the soakaway (m²) R: Total rainfall in design storm (m) Outflow (O): O = as50 x f x D as50: Internal surface area of proposed soakaway up to 50% effective depth, excluding the base area (m²) f: Soil infiltration rate (m/s) D: Storm duration (sec) The following 1 in 100 year return period rainfall values will be used for the infiltration proposals. This is calculated using the Wallingford Procedure for the Cambridge area with catchment details: 5-year return period rainfall of 60 minutes duration = 20 r Ratio Rainfall Value = 0.45 Standard Average Annual Rainfall = 550 WRAP Soil Index = 2 Runoff Coefficient = 100% Climate Change Allowance = 1.4 Return Period = 100 years Storm Duration (Minutes) 5 10 15 30 60 120 240 360 600 100 Year Return Period Rainfall (mm) 20.50 28.96 35.18 45.07 56.00 67.42 78.11 85.05 93.98 Table 4: 100 Year Rainfall Values Infiltration Rate Calculation The proposal presents a rainwater run-off of 115m² from the proposed dwelling roof area and 62m² from the proposed garage roof area. The soil infiltration rate should be calculated as follows: f = Vol75-25 / ap50 x tp75-25 f: Soil infiltration rate (m/s) Vol75-25: Volume of water in the trial pit between 75% - 25% effective depth (m³) ap50: Internal surface area of trial pit up to 50% effective depth, including the base area (m²) tp75-25: Time for water to fall from 75% - 25% effective depth (sec) Vol75-25 = 0.3 x 0.3 x (0.3 x 0.5) = 0.0135m³ ap50 = (0.15 x 0.3 x 4) + (0.3 x 0.3) = 0.18 + 0.09 = 0.27m² Average tp75-25 = 2870 sec Average infiltration rate to be used for design, f = 0.0135 / (0.27 x 2870) = 1.74 x 10-5 m/s Storage Volume Calculations The proposed soakaway is to be made with dimensions of 1.40m effective depth, 3m long and 3m wide. Inflow I = A x R A = 115m² + 62m² = 177m² R = M100-5 = 20.50mm = 0.02050m I = 177 x 0.02050 = 3.63m³ Outflow O = as50 x f x D as50 = (L x h x 2) x0.5 + (W x h x 2) x0.5 = (3 x 1.4) + (3 x 1.4) = 8.40 m² f = 1.74 x 10-5 m/s D = 5min = 300sec O = 8.40 x (1.74 x 10-5) x 300 = 0.044m³ Storage Volume S = I – O: = 3.63 – 0.044 = 3.58 m³ Calculations were then repeated for a range of critical storm durations. Storm Duration (min) Required Soakaway Volume (m³) 5 3.58 10 5.04 15 6.09 30 7.71 60 9.38 120 10.87 240 11.71 360 11.88 600 11.34 1440 7.14 Table 5: Soakaway Volume for Range of Storm Durations The calculations have indicated the critical storm duration to be 360 minutes in this situation, giving 11.88m³ soakaway volume requirement. Using geocell soakaway crates with 95% void space gives an effective volume of the soakaway: EVol = 3 x 3 x 1.4 x 0.95 = 11.97m³ Effective Volume 11.97m³ > Required Volume 11.88m³ It should also be ensured that any proposed soakaway discharge from full to half-volume within the required maximum 24 hour duration, to allow for subsequent storm inflow. The half drain time (ts50) should be calculated as follows: ts50 = S x 0.5 / as50 x f = (11.88 x 0.5) / (11.88 x 1.74 x 10-5) = 40716 sec = 11.31 hrs Half Drain Time 11.31hr < Required Drain Time 24hr

Absolutely cracking, look at that sky today. 300mm slab chosen for lots of thermal mass?

Hello, has anyone else had any luck using their PHPP data to comply with Part O?

I agree. The general public have no objective standards when purchasing the most expensive thing they will ever buy. Contrast this to a car purchase, or even a toaster. Very few of those tout period features or 1900s technology as a selling feature. Because no one would buy them if they did.

I'm making one from treated fencing timber (strained black) and with steel spikes in the ground. Sits totally separate from the building, but butted up against it. Avoids thermal bridges. Avoids structural engineering. Is much cheaper.

If you're sensitive to air quality, it may be a problem. I am. Going to attempt to mitigate this with a chuffing huge carbon filter on the air intake to the house. Something like: https://www.globalairsupplies.co.uk/product/carboair-100-filter/ A big one with a large surface area and bore should not cause too much extra work for the MVHR.

Looking forward to watching this one. Given this I believe they were going for PH Premium. To which the institute clearly suggests that self generation is problematic and suggest buying a share in a local wind turbine or similar. This share of generation is then "tied" to the house for PH Premium certification. https://passipedia.org/certification/passive_house_categories/classic-plus-premium Doesn't take away from the point that DNOs might like to help us with delivering our generation more easily!

Day light in the pins... this is what worn pins look like presumably?!

thank you all, updates: Members Wishlist 4 WD 4 in 1 bucket with Pallet forks Extending backhoe (gives more reach?) Pins not too worn (nice to have) Starts when cold Does not smoke (too much) Tyres reasonable (expensive) No excess hydraulic leaks

Members Wishlist 4 WD 4 in 1 bucket with Pallet forks Extending backhoe (gives more reach?) any more? worn joints.... this just means there is some play in every joint? makes it a bit wobbly when in use?

This is the best attempt at talking me out of it so far @Mr Punter. All makes perfect sense. Spend £2k and have a BIG digger for a month. Everyone else, please stop showing me pictures of your machinery... It's not talking me out of it =p

Recommended then @joe90?! Any idea what you ran it for (£) over the course of the few years you had it please? 3CX, were parts easy to get hold of? Was it easy to SELL at the end?

Yes indeed, big scoop on front, bucket with arm on the back. Chews up the ground, noted. Fortunately we are on well draining chalk, but even so, something to be aware of. Thank you @ProDave.

Be kind, I'm new to this =) Seems like best of mini digger and dumper in one? Cheaper to buy, run and then sell, rather than constantly hiring digger+dumper? Budget: £5k cheap / £10k ok? £5k machinery seems to be old (Bonus: no electrics to go wrong. Bogus: everything is warn) Buying: How to spot a good one? This useful list may inform? Running cost: hydraulic fluid, hoses, red diesel, inverter, batteries? what am I missing? Use: I can drive a digger no problem, assume this has same learning curve? Parking: we have space for it. Security? Maintenance: brother in-law fixes farm machinery, is 300miles away but always available by phone. Garage (shed, really) in next road are very practical and used to machinery. Talk me out of it.

Any reason you used isoquick over others? Interested as we're having a raft like this... P.s. wish I had access to machinery like that, must make it easy!

We have lovely neighbours, in this case we were able to grab showers and fill water bottles!

We're doing this currently. First question: are all members up to caravan living? (presumably a 2/3 bed static?) 1 year in the caravan already here, loving it, but we aren't precious people - I pump raw sewage to various tanks each month before a large collection every few. We lost running water in the week long -10 snap last year. With a one year old. Again, we enjoyed the experience. 3 children in a caravan might be pushing it. There is plenty of space for living, but none for yourself. Might be worth considering GSH if in it for many winters? More expensive to run and buy however. I'm sure we could survive on elec only if we had needed to tho. Double glazing? Recommend a wall mounted heat pump air-conditioner. Does heating and cooling. Makes it quite civilised, more comfortable than most UK housing...? perhaps. Managing time, impossible to do it all. Sacrifices have to be made if you want to build. Only you will know how much you would give up in pursuit.

Couple of FCUs: No idea if they'll sell to consumers. https://www.troxuk.co.uk/fancoil-units/pwx-ea11f88aee974359 https://www.advancedair.co.uk/products/fan-coil-units/epic-ecm-fan-coil-unit