RenovationNotes

References

Heating, Plumbing & Electrics

255 sources in the library on heating, plumbing & electrics. Each one says what the document covers and what it is good for. Name a source to see which document it is and where to read it. One at a time. Page 7 of 7.

  1. supplier figure RN-7U4Z9A

    Screwfix

    Screwfix's twin and earth cable range with prices by conductor size and drum length. Twin and earth is the standard domestic wiring cable, so this is the published material price behind a rewire estimate. A retail trade counter price: real, dated by the visit, and above what an electrician buying in quantity pays.

  2. supplier figure RN-0X3KX6

    Stuart Turner

    Full manufacturer specification table for a whole home water boosting pump. Maximum head at closed valve is 4.2 bar (43 metres) with a maximum flow of 78 l/min. Maximum static inlet pressure is 3 bar (31 metres) and maximum working pressure 800 kPa (8.0 bar). Water temperature range is 4C minimum to 23C maximum, so it is a cold feed booster, not a hot water pump. Power consumption is 600 watts on a 220-240V single phase 50 Hz supply with a 10 amp fuse rating, and duty rating is continuous (S1). Typical noise is 55 dB(A), which matters when siting it in an airing cupboard next to a bedroom. Connections are G1 male to 28 mm / 1 inch universal with 28mm UK and 1 inch ROI olives supplied. Dimensions are 273mm long by 188mm wide by 345mm high excluding hoses, weighing 8.04 kg. Warranty is 5 years subject to conditions.

  3. supplier figure RN-P38MQC

    Telford Group

    Manufacturer dimension and capacity table for a high gain unvented cylinder, the type with an enlarged or external heat exchanger for faster reheat. Capacities are 90, 125, 150, 170, 200, 250, 300, 400 and 500 litres. Heights are 750, 880, 1060, 1200, 1150, 1490, 1780, 1590 and 1835 mm with diameters of 510 mm to 170 litres, 554 mm from 200 to 300 litres and 660 mm at 400 and 500 litres. Note the 554 mm shell here against the 580 mm shell on the same maker's standard Tempest Indirect at the same capacities, a 26 mm difference that can decide whether a cylinder fits an existing cupboard. Connection heights A to F are tabulated for every size, running from 170 mm up to 1590 mm.

  4. supplier figure RN-P05ZFL

    Telford Group

    Manufacturer dimension and capacity table for a stainless steel indirect unvented cylinder, the numbers needed to check a cylinder will physically fit. Capacities are 90, 125, 150, 170, 200, 250, 300, 400 and 500 litres. Heights are 750, 935, 1060, 1200, 1150, 1490, 1780, 1590 and 1835 mm and diameters step through 510 mm up to 200 litres, 580 mm to 300 litres and 660 mm at 400 and 500 litres. Every size is supplied with a 3 kW immersion heater as back-up. Connection heights A to F are tabulated for each capacity, from 170mm up to 1590mm, which is what determines whether existing pipework can be reused. Note the 200 litre unit is shorter than the 170 litre one because it steps up to the wider 580 mm shell, so a taller cupboard is not always needed for more storage.

  5. supplier figure RN-O350D4

    Titon

    Manufacturer specification for a compact whole house MVHR unit for smaller dwellings. Airflow is up to 60 l/s (217 m3/h) at 100 Pa. Specific fan power is down to 0.65 W per l/s, notably worse than the 0.43 W per l/s of the larger HRV4.25 in the same range, which is the trade-off for a smaller unit. It is IP32 rated with three volt free switch inputs and weighs 16 kg, against 28.5 kg for the large unit, the figure that decides whether it can go in a cupboard or needs a loft platform. Guarantee is 3 years UK. It is independently tested by the BRE.

  6. supplier figure RN-L0NVHG

    Titon

    Manufacturer specification for a whole house mechanical ventilation with heat recovery unit. Airflow is up to 158 l/s (568 m3/h) at 100 Pa, heat recovery efficiency is up to 91 per cent and specific fan power is down to 0.43 W per l/s. The unit is IP32 rated, weighs 28.5 kg and has three volt free switch inputs. Noise is quoted as dB(A) at 3 metres on both hemispherical and spherical measurement. Guarantee is 3 years in the UK. It has been independently tested by the BRE, which is what allows the figures to be used in a SAP calculation. The smaller HRV4 Q Plus in the same family reaches an SFP of 0.38 W per l/s at up to 91 per cent heat recovery.

  7. supplier figure RN-NGM17E

    Triton Showers

    The manufacturer's own MCB sizing table for electric showers, which is the figure an electrician needs before a shower is upgraded. A 7 kW shower takes a 30 or 32 amp MCB, 7.5 kW takes 32 amp, 8 kW takes 40 amp, 8.5 kW takes 40 amp, 9.5 kW takes 40 or 45 amp and 10.5 kW takes 45 or 50 amp. This is why swapping an 8.5 kW unit for a 10.5 kW one is not a like for like change: the circuit protection and usually the cable have to be uprated too. Triton states that some units will keep working at reduced flow on a minimum running pressure of 0.5 bar at 8 litres per minute, but full flow performance needs more. Water connections are 15mm compression on the mains fed range and the T90xr pumped shower, while the T80si pumped shower uses a 15mm push fit inlet. Where mains pressure is insufficient a T450i single impeller pump can feed most electric showers, but not a 10.5 kW unit.

  8. supplier figure RN-NNGW3V

    Triton Showers

    Manufacturer figures for how electric shower kW converts into water at the head. The range runs 7.5 kW to 10.5 kW. A 7.5 kW shower giving a 40C shower in winter delivers a flow rate of around 3 litres per minute, and a 10.5 kW shower gives 50 per cent more flow than a 7.5 kW one. The manufacturer's supply requirement example is 1 bar delivering 8 l/min for the lower rating and 1.5 bar delivering 11 l/min for the higher. The 3 l/min winter figure is the honest number behind complaints that an electric shower feels weak: the incoming water is colder in winter so the same kW heats less of it.

  9. supplier figure RN-2431PI

    Twyford (Geberit)

    Manufacturer catalogue data for a rimless floor standing washdown WC pan. Full flush volume is 6 / 4 litres in accordance with EN 997, and the pan is classified as EN 997 Type 2 with the flush rated as Type 1. Outlet is horizontal, the standard UK back outlet arrangement. Product material is vitreous china and pan dimension B is 35.5 cm. The pan uses Rimfree flush technology, meaning there is no enclosed rim cavity for limescale and bacteria to sit in. The cistern, seat and fastening material are ordered separately, which is the detail that catches people out when a pan is bought on price alone.

  10. supplier figure RN-9LKL9S

    Vaillant

    Manufacturer specification for the aroTHERM plus, available at 3.5, 5, 7, 10 and 12 kW. Quoted SCOP is up to 5.03. The unit uses the natural refrigerant R290 (propane) with a global warming potential of 3, reaching a flow temperature of up to 75C, which is what allows a like for like replacement onto existing radiators. Sound power is 51, 53 and 58 dB(A) across the casing sizes, and the sheet quotes a sound pressure level of less than 30 dB(A) at the stated planning distance. Product dimensions are 765 x 1100 x 450 mm for the smaller casing and 1565 x 1100 x 450 mm for the larger. Weight ready for operation is 114, 128 and 194 kg. Maximum rated current is 14.3, 15 and 23.3 A single phase, with 400V three phase available on the 10 and 12 kW only. IP rating is IP 15B. System operating pressure range is 0.5 to 2.5 bar. Refrigerant charge is 0.60, 0.90 and 1.30 kg, which matters because propane charge size drives the siting rules.

  11. supplier figure RN-4I0N63

    Vaillant

    Manufacturer technical sheet for the ecoTEC plus combi range (825, 832, 835, 838, 938). Nominal heat output range at 80/60C is 3.8-19.3 kW for the 825, 5.2-24.4 kW for the 832, 6.0-24.4 kW, 5.8-30.4 kW and 6.5-28.6 kW across the larger models; at 50/30C the ranges rise to 4.1-20.8 kW and 5.8-26.4 kW respectively. Domestic hot water flow rate at delta T 35K is 10.5, 13.0, 14.3 and 15.9 l/min across the range, dropping to 8.8, 10.9, 11.9 and 13.2 l/min at delta T 45K. ErP efficiency is 94 per cent. ErP sound power is 45-47 dBA. NOx is 29-55 mg/kWh depending on model. Boiler dimensions are 720 x 440 x 338 mm (HxWxD) and dry lift weight is 36-43 kg. Clearances required are 5mm to each side, 165mm above, 180mm below and 500mm to the front. A 10 year guarantee is available on registration with Vaillant Advance. Use the delta T 45K flow rate, not the headline 35K figure, when sizing a combi against a real shower.

  12. supplier figure RN-9YM2IO

    Vent-Axia

    Manufacturer datasheet for a decentralised mechanical extract fan, with the noise against airflow table an extractor fan choice actually turns on. The 100mm unit has variable speed settings of 5-30 l/s on trickle and 6-35 l/s on boost, with a minimum noise level of 13 dB(A) at 3 metres. The 125mm unit runs 9-30 l/s trickle and 10-35 l/s boost with a minimum 12.9 dB(A) at 3 metres. The full sound tables show the 100mm fan at 13, 14, 17, 24 and 41 dB(A) as flow rises from 6 to 8 to 13 l/s and up to maximum, and the 125mm at 12, 14, 17, 19 and 36 dB(A) at 9, 13 and 15 l/s and up, so noise rises steeply near the top of the range and a fan run at trickle is close to inaudible. Specific fan power is as low as 0.12 W per l/s. Airflow is set in 1 l/s increments. Vent-Axia notes the larger 125mm spigot places almost no restriction on duct length and bends compared with a traditional 100mm axial fan, so fewer fans are needed for whole house ventilation, and that it improves the Dwelling Emission Rate. Supplied with a 7 year guarantee.

  13. supplier figure RN-FB1C5B

    Viessmann

    Manufacturer brochure with the technical data table for the Vitodens 100-W. Heat output at 80/60C runs 2.9-10.1, 2.9-17.5, 2.9-23.0 and 2.9-29.3 kW across the four sizes; at 50/30C the same units give 3.2-11.0, 3.2-19.0, 3.2-25.0 and 3.2-32.0 kW. The 2.9 kW minimum is the notable figure, a wide modulation range for a small property. Domestic hot water flow at a 35C continuous rise is 10, 12 and 14 l/min, or 13.3, 15.6 and 17.0 l/min measured at a 30K rise under EN 13203-1, which is why two manufacturers' flow rates are not comparable unless the delta T matches. Rated output for DHW is 27.3, 31.7 and 34.9 kW. Case dimensions are 700mm high by 400mm wide by 360mm deep, weight 33 kg, with a 60mm flue gas connection and 100mm ventilation air connection and an 8 litre expansion vessel. The Vitodens 111-W adds a 46 litre stainless steel charging cylinder. Guarantee is 5 years, extending to 7 or 10 years when fitted by a Viessmann trained installer.

  14. supplier figure RN-U1GBHF

    Worcester Bosch

    Manufacturer one-page specification for the Greenstar 4000 combi. Central heating output modulates from 3 kW up to 24 kW. Hot water flow rate at the tap at 35C delta T is 10.2 l/min on the 25 kW model and 12.3 l/min on the 30 kW model, so the model number describes hot water power, not radiator power. Guarantee is up to 8 years when installed by an accredited installer. Servicing clearance is 20mm from a removable cupboard door and 600mm from a fixed surface. This is the source for the point that a 30 kW combi does not put 30 kW into the radiators.

  15. supplier figure RN-1J8I94

    Worcester Bosch

    Manufacturer professional page for the Greenstar 4000. Available at 25 kW and 30 kW outputs with hot water flow rates up to 12.3 l/min at 35C delta T. Modulates down to 3 kW central heating output, a 1:10 turndown ratio, which matters for short-cycling in a small well-insulated house. Quoted operating noise is 45 dB(A). Full flow rates are achieved from 1 bar mains pressure. Guarantee tiers of 7, 8 and 10 years are offered depending on installer accreditation and system protection.