
kla456
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Hello Doigan, I had a Daiken ASHP installed last August . My unit is Daiken Altherma 3 providing space heating and DHW. I am really satisfied and I also expect to improve efficiency next year after I get to understand the system, and make some adjustments. Given the extent of mis-match between your expectations and the system performance, I'm not sure you should be looking to this forum to solve the issues. I spent months of dialogue with the Daiken-approved installer before committing to the installation, including three meetings and a site visit. The installer provided me with 7-page Daiken Altherma Selection Project Report which included: proposed solution overview, selection criteria, system diagram, 6 graphs including estimated energy consumption and thermal output estimates, and a room-by-room heat loss calculation (it did not agree with my own calculation - based on Jeremy's great spreadsheet - but thats another story for a later post, maybe after first year's heating season). I cant imagine how you could be left with a Daiken system that does not substantially deliver your requirements. I expect you have called back the installer? If he did not respond adequately then I suggest you seek recourse, initially with Daiken, and eventually elsewhere until you get what you ordered and paid for.
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Looks like that, or something like that. Do you know anyone who installed MMSP? Either from the trade or as a homeowner? I really want to know more whats involved and what type of reports are delivered. Ofgem encourage MMSP and will pay an extra bit of RHI if you install it. I would not be surprised if Daiken (and other heat pump manufacturers) connect to the installation and monitor performance for their own information - but not to providing me with reports, especially if performance is not great and the reports might be used against them.
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Yes, the Daiken has an energy meter that shows the kWh used, but I expect Ofgem have set up MMSP for a lot more than that. Offgem pay out a lot of money in RHI and would obviously like to know what performance is being achieved by the various different installations. Maybe the industry does not want that - I dont know, but my interests are with Offgem's. I dont know the detailed information I might get from MMSP, but I want to try it and cant find an installer.
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Hello Forum, and many thanks for earlier heat loss discussion and use of Jeremy's spreadsheet during the design stage. ASHP was installed last summer and I can report to be 'snugly and smugly' satisfied so far. A few aspects of the installation did not follow the plan, but the result is very acceptable. For now, I would like to ask assistance to find an installer for MMSP (recommended by Offgem). I was surprised my ASHP contractor would not install MMSP, that Daiken (supplier of the heat pump) could not provide me with an approved alternative, and neither Ofgem nor MCS carry a register of MMSP installers. Although I am subjectively satisfied, I would like to have the performance objectively measured and monitored. Thanks, Hugh
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Fabric and ventilation heat loss calculator
kla456 replied to Jeremy Harris's topic in Heat Insulation
Great! Thanks- 77 replies
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Fabric and ventilation heat loss calculator
kla456 replied to Jeremy Harris's topic in Heat Insulation
I would like if the 'Heat Loss vs Month' tab could display for higher ranges 3000 - 5000 then playing 'what if' in the first tab. The master displays for 0 -1500 range but does not seem to auto-adjust for changed data in the first tab 'Fabric and Ventilation Loss'. Im not competent enough with Excel myself. Very grateful for this useful calculator.- 77 replies
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Reply toNickfromwales Thanks for that Nick. In place right now: Saunier Duval F35E gas boiler - pre-retrofit combi connected to retrofit UFH 200mm concrete with 70mm tiled screed 7.5 kW PV diverting by 2 Immersuns. Immersun1 to 200L DHW direct tank1 with top and bottom immersions. Immersun2 to 200L indirect DHW tank2 with bottom immersion (original pre-retrofit tank still connected to boiler). The two tanks are connected serially. Tank1 top immersion is on time switch - the other two taking from the Immersuns. All unvented. EV for local trips 5,000 km/year drawing from wall charger. Attached 2017 energy report She Indoors is hobby user of all types of washing machines (3 clothes washing machines, 2 clothes dryers, 2 floor washing machines) - compared to 1 shaver. She often uses 50kWh/day. Previous points Pre-purchased Daiken indoor wall-hung hydrobox EHBH16CB3V, user interface EKRUCBL2C, hot water cylinder EKHWS(U)200A3VB - all new kit from discontinued project, but no warranty I expect. This kit can be matched with 11kW, 14kW or 16kW outdoor unit. HWC has an indirect coil and heater. Present tense - see above I understand. My question related to possible power vagaries if feeding HP directly from battery storage. Ok Good. Unvented, so leave existing DHW set-up. Install new diverter switch configured for car (Zappi?) - car is at home during day. Dont consider off-peak until get better handle how to get to zero on meter with flexible diverting. Mother-in-law (nice lady) standing in 20 degrees in front of HR outlet delivering 12 degrees declares to all and sundry 'this is air-conditioning making us cold'. Instructs daughter to switch off system and open windows to get 'fresh air' (uncontrolled and unfiltered) at 6 degrees. Yes, time was good few years ago to install PV, now good time for HP, but not yet for PV Storage. Look forward to hearing about your progress. I lost that battle - now they just say no need for heating, and by definition HR. ditto 65% of floors (all GF) is 270mm tiled concrete. I prefer to wait for better batteries (not bring in Sunamp) and stay with that. Might try positioning outdoor unit under a bedroom window. Yes. I grew up in a house with an open fire. Our parents and grandparents got by ok with woollen sweaters. All this kit is a madness, as you said - but passive-standard building envelope is not. Yes, got all that. Will install HP next month leaving flexibility regarding DHW - then wait and watch for a year. There has to be a next stage with more PV and storage - see attached import/export balance. Just wave to us minions as you pass.Scan 2018-8-20 15.23.55.pdf
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Hello Members, this is my first post and I'd like to say that I really appreciate Jeremy's Heat Loss Calculator, which took one day to complete (yesterday). The compact one-page format with 'what-if' ability is very, very useful. Thank you Jeremy. These are my current considerations and I'd appreciate any comments and/or advice from members Regards, Hugh
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Hello Forum, Near-zero refurbishment and extension of 1955 bungalow into 2-storey family home with PV and switching surplus to domestic hot water. Contemplating Stage 2 PV with storage. Stage 3 later might replace gas boiler with heat pump.