ragg987

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ragg987 last won the day on June 7 2017

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About ragg987

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  • About Me
    Detached 330m2 house on 3 levels with separate garage, MBC timberframe, Integraspec ICF + Kryton waterproof concrete basement, Norrsken 3G glazing. Clay tiles and zinc roofing, STO render on carriers plus some timber cladding.

    Designed to Passiv standards and tested to 0.57 ACH @ 50Pa. Heating and DHW using 7kW ASHP. UFH to ground and basement only. Airflow MVHR with in-line electrical heater to first floor. PV 4kWp
  • Location
    Aylesbury

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  1. ragg987

    Optimum use of PV

    Are you intending the ASHP to heat the Sunamp? (Bearing in mind you need a high-temp ASHP to do that, an ordinary one will not reach the phase change temp) Some considerations: 70l of buffer water is tiny. One shower will deplete most of it Heating using ASHP / PV / direct electrical will struggle to maintain more than 1 shower when your hot water store runs out Hence you need to size your store based on a likely scenario 8 showers within 1 hr means storage for 8 showers -> approx 20-25kWh but 4 showers in the morning and 4 in the evening means you can halve your storage I understand Sunamps are modular units and allow partial heating, e.g. you can 'switch off' cells when only 2 of you and switch them on when you have guests. Probably worth checking with Sunamp how this works. PV becomes a bonus source of electrical energy that you can optimise as follows: First priority is to use the PV in your house - appliances timed to run on sunny days, or EV car charging Next priority is to supply the Sunamp - use circuit 1 on your solar diverter Last priority is to pre-heat the buffer - use circuit 2 of solar diverter If all above are satisfied, you export the excess You can experiment with buffer temperature to avoid overheating your house. Your ASHP will support 2 circuits, so you can have DHW higher (to allow Sunamp to store the energy) and buffer lower (to supply UFH or pre-heat DHW). The solar diverter is important. For instance the Immersun has ability to sequence between 3 loads. The example above uses 2 loads. On sunny days, you sequence Sunamp > buffer. On gloomy days any spare PV drives the ASHP.
  2. ragg987

    Optimum use of PV

    ...
  3. You could claim they are fitted light fittings which are definitely covered.
  4. ragg987

    Brise soleil

    Who you calling a bee! And where's the queen?
  5. ragg987

    Recessed track lighting and spotlights

    We used this in bedrooms as well as lounge and dining areas: https://intalite.co.uk/slv-145211-eutrac-3-circuit-recessed-track-2m.html Recessed into the ceiling and 3-circuit. As part of a complete lighting scheme based on multiple "layers" of light, they work really well, give flexibility but do cost quite a bit. If recessed properly there is a small lip over the ceiling, quite subtle. The tracks are very strong and you can screw them to the ceiling battens or joists at regular intervals so they are able to carry quite a large weight e.g. for your crystal chandeliers ! In our case we used the track to provide 2 circuits, each controlled by it's own dimmer at 230v mains voltage. Circuit 1 for pendants (general lighting). SLV have a clip-in adaptor and it is simple to wire your own pendant to it. The adaptor is universal and you can set it to either circuit 1, 2 or 3 on the track. Circuit 2 is for spots which I have positioned to accentuate and highlight e.g. wall hangings or work areas. Separate to this, we have 5A sockets in walls into which we plug stand-alone floor or table lamps, also controlled by a single dimmer Full control from one point, no fancy computer controlled lighting and quite effective. I understand the tracks and clip-on are semi-universal, but did not need to deviate from one brand.
  6. ragg987

    Getting the neighbours on side...

    What I did...
  7. Order through topcashback for 5% to 7% back on Tesco Wines. Plus an additional £3 promotion valid today only.
  8. ragg987

    ASHP glycol

    What about water inside the heat pump? I would think that is going to freeze sooner than water in an insulated or underground pipe.
  9. ragg987

    ASHP glycol

    You do not need glycol witha split ASHP. The primary loop is filled with refrigerant, in our case this was already inside the unit and once pipework was in place the pressure released to fill the system.
  10. ragg987

    Lighting

    Lighting is about personal preferences, but just to share my experience. We have hidden LED strips in our kitchen. The effect feels a bit cheap and nasty, and the amount of light it gives is not great. More decorative, despite using pretty high output strips. We also have the false ceiling effect with concealed LED strips in our bathrooms, like the picture you have. These work better than the kitchen but the effect is a bit clinical, not exactly welcoming. Luckily we also have lit mirrors in the bathroom which break the monotony. This despite choosing warm LED at 3000K colour temperature. I love those low level lamps, we use these in circulation areas, stairways and bathrooms, activated by motion sensors. Practical and beautiful, ours are by SLV.
  11. Jasun quoted a high price. I purchased from filterworld and am replacing every 6 months, they work fine. All links above.
  12. ragg987

    Where to Visit for Flooring Inspiration

    Not able to offer any advise on your question, but are you sure you want porcelain tiles? IMO they add to the feeling of a cold and echoey bathroom, which I dislike. We went with Amtico which has a tiny amount of give and feels warmer as well as less reflective of noise.
  13. ragg987

    Current best options for solar panels

    Panels require light, either direct or indirect. A light but of dappling for a few hours will likely have minimal impact. Also, if trees go bare in winter the impact will be less. So not as clear cut, but if shading at any point covers 10% of panels then output might only decrease 5% or less. Microinverters will help. Your other question about length of cables. One company tried to tell me the inverter had to be close to the panels else losses would be high. I used one of the online models to show that the cable length on DC side has low losses, or DC cable is perhaps 50m and AC is 2m. Works well, we got 4GWh in our first full year from a 4kWp install. Just bear in mind the amount of cable in a drum, it might be better to avoid joints to reduce potential points of failure.
  14. There is always an "event" just round the corner. I personally would not hold off, just invest it in a balanced way. Example: Brexit doom has been on the cards for about 2 years. Over that period markets (albeit higher risk side) have returned me over 20%. I believe there is never a right or wrong time, just do it early, spread the risk and also buy frequently and often rather than one one big lump payment.
  15. Some good advise here. If I were investing this (bear in mind this is for my situation) : First clear any debts, especially the more expensive ones. Put some cash where it can earn interest and be readily accessible. Santander 123 current account give 1.5% up to £20k, some provisos and a monthly fee. Invest balance between low, medium and high risk. Vary the split according to your risk appetite and how long before you need to access it. Use ISA limits : - cash is safe and you will not lose any money with the £85k safeguard - low/medium risk like the Vanguard Lifestrategy mentioned by @Alphonsox, the 20% variant is lowest risk for lowest potential returns - higher risks like indexed-linked to S&P 500 (more suitable if for 5 years+ horizon) Of course with latter 2 you risk losing money. I am a big fan of Vanguard, they do not gobble up your savings in fees and a lot of their investments are free of buy / sell charges. But you need to have the right attitude to understanding and coping with the risk - they give no guidance.