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Found 10 results

  1. Inchbyinch

    Sunamp not heating the water

    Hi All, I temporarily commissioned my sunamp a few weeks ago, followed the instructions and was happy it was all working as it should. Now I have it wired up in a permanent arrangement, switching the solar through a time clock as I have no PV installed yet. I have an electrical meter on it to measure use. The problem is that now it doesn’t take any current and even when I run preheated hot water through it I’m getting cold water out. Hoping to move in next week with SWMBO and two toddlers next week and one more on the way🙈🙈. So hot water must be going!! Thanks in advance, Ed
  2. I met with the Architect last week and ran into a problem. I've always been keen on using SunAmp with Solar PV as my preferred heating/hot water platform. I'm building a small 108m2 house so it's a good fit in my opinion. However....Building Control legislation has changed in recent years and I've to "opt in" to keep the bank happy. This means hands off first fix basically including MVHR that I was looking forward to installing. Anyway, that aside there's no registered installers in ROI for SunAmp and therefore no one can sign off such a system. Andy in SunAmp has been very clear on this point and even with the Amazing Nick willing to design and provide support I doubt any builder here will accept this risk and one I've just spoken to voiced his concerns. I've to go out to tender soon and don't want this to blow up on me! There are two likely heating options in my house at the minute: ASHP with underfloor, towel rails etc and hot water tank etc, no solar PV Solar PV and SunAmp UniQ to do the same without the hot water tank My plan was to live with SunAmp for a year and get an ASHP later if required. The more likely scenario is I get an ASHP and add SunAmp later (!) and possibly end up not using the ASHP afterwards! Well, I'll use it to recharge the SunAmp (ideally with a high temp ASHP unit) but it's the additional combined cost that I'd rather not spend. And retrofitting a SunAmp after a commissioned system is built and signed off isn't the route I'd prefer to go. One option I was wondering about was what the minimum heating system I can get away with that leaves me open to easily incorporating a SunAmp shortly after building control is signed off? Maybe an instant electrical hot water heater and a few two bar fires? But then there's DEAP (SAP equivalent) to contend with. Anyway, thought I'd throw this to the experts here and see if I'm stoking a fire to burn myself in or not?!! Thanks!
  3. I've had my as designed SAP report done and I'm wondering whether it's worth querying the figures or whether it doesn't matter in the slightest. The house isn't designed to PHPP but is an energy efficient build with passive slab; it has lots of glazing. The as designed score is coming in at 84. From what I can see, the chap doesn't understand that I have a pcm thermal store; in fact, he has assumed no thermal store whatsoever as I told him that I wouldn't have a hot water cylinder and sent him info on the sunamp instead. From looking at the figures, it assumes that all heating is electric (correct) and when not powered by PV, will be at a standard electricity day time tariff. The figures also appear to include a whole host of thermal bridges, including sills, lintels and the intermediate floor. Am I making a fuss about nothing?
  4. Hi, I'm not entirely sure if this post belongs here but there are several components that I think I should consider as part of one solution: Heating and Hot Water. You may be familiar with my project from the introductions forum but I'll present you with my circumstances in any case. I currently have a Combi Boiler heating our traditionally constructed 2700sq.ft bungalow and providing hot water to 2 showers (right now we use 14000 kWh Electricity and 48907 kWh Gas per annum!). We will be updating the current building with thicker loft insulation and better windows, but will still use rads to heat this portion of the house when we complete the renovation. The new part of the house will add around 6000sq.ft and will be built to much better u values using ICF walls and SIPS roof. Here's where I'm confused, I don't know what the best system will be that can provide loads of hot water (7 showers), heat UFH in the new part and also heat the rads in the old part. I'm further confused by mhrv, I've heard this is a necessity in ICF homes, but then heard the speaker at the homebuilding show at NEC state that they're pointless for homes over a certain size. I'm open to installing an ASHP but I'm not sure whether it's necessary or even beneficial when I have the option of mains gas. Lastly, I've a good size roof pointing SE without any shading to speak of so we could potentially generate a considerable amount electricity, but I would have to consider the regulations of having a system over 4kWh and the costs associated, also factoring potential battery storage over and above Sunamp if this too makes sense to use. I don't have a clue where the feed in tariff comes in to all this! There will also be a detached annexe of around 800sq.ft and we will most likely go with UFH and 1 shower, I'm not sure how this should be incorporated in to the overall scheme or whether I should treat it separate. I know its probably a good idea to speak with an energy solutions firm and will most likely speak with Stratford Energy Solutions who have been recommended to me, however, I also know that they may have commercial interests that don't take in to account all of the factors we self builders consider.
  5. AndyT

    Hello from AndyT

    Hi everyone, The names AndyT and I work for Sunamp Ltd. - will not be selling on the forum but if you need information or advice I would be pleased to try and help. I have been in the renewables industry for 10 years - my 4 bed detached home with 4 adults is in W-s-M (hard water area) is used by Sunamp as a live test house. Robert Llewyllen (Fully Charged) filmed at my home - you can see the episode here https://www.youtube.com/watch?v=9upXeTMHUqE Economy measures added to this house originally built by Second City are; cavity wall insulation, 300mm of loft insulation, all external doors and windows upgraded, 3.5kWp Solar PV with excess generation diverted into a 5kWh SunampPV heat battery pre-heating hot water into an Intergas ECO RF30 with weather compensation and in-comfort control. My Miele dishwasher is fed with pre-heated water, I have Economy 10 off-peak and have monthly direct debits of £35 for electric and £10 for gas. You can view my dashboard here http://wattson.energyhive.com/dashboard/AndyT lots of interesting data. Also just started testing OpenTRV / Radbots and Loop energy monitoring. Looking forward to chatting. Kind regards. AndyT.
  6. Pete

    Sunamp

    For those interested apparently tonight's episode on grand designs has a Sunamp system in the project
  7. SunampBlogger

    Sunamp Blogger

    Hey there everyone, my name is Elliot Wilson and I am the current Technical Blog writer for Sunamp. I am with Sunamp for 12 weeks as part of an internship. During my research into the company I have found posts from the CEO (Andrew Bissell) on the predecessor to this forum, ebuild.com. I am hoping to start up discussions with people who were engaged with Andrew previously. Notable users include: jsharris, recoveringacademic, DamonHD, ProDavie, SteamyTea, notnickclegg and Nickfromwales, among others. I am also hoping to post articles that will be published on the Sunamp webpage. I have been talking to one of the moderators, have been informed of forum policy and have familiarised myself with the T and C's. If I still transgress any rules please let me know. Articles have already written and so it is just a matter of when I want to post them. Article details include: phase change material (SunampPV, latent heat) vs alternative thermal storage (water tanks, sensible heat), a case study of an employees house who has data analysis software which monitors things such as exported, stored and generated electricity amongst other things and (slightly unrelated to Sunamp) a comparison of the Tesla Powerwall 2 vs the Sonnen Eco 8. There will be more. Any questions people want to ask they can contact me through this. Cheers Elliot
  8. Hi All, We are eventually beginning to make real progress on our new house (after 2+ years in planning) The site has been cleared, layers of stone installed and the Kore ESP for the foundation has been delivered. The ESP will be laid next week with the required ducts and drainage installed ready for the slab to be poured. (the frame, a SIPS with cellulose is 80% complete and the windows and doors have been ordered). We are aiming for passive levels of insulation and airtightness, South facing un-shaded. No stoves. Our house is large approx 400sqm plus double attached garage. 5 bed with 2 ensuite, a main bathroom, additional shower room and a small WC. So 5 showers, 1 bath (young children so currently 1 bath per day). Shower use 3 per day. Occasional guests so need capacity for that. So we should need very little heat and could likely do without bar a few small electric heaters but we will put in UFH pipes (in the grand scheme of things this is a very low cost). But what do we do to provide the small amount of heat to the UFH and more importantly heat our DHW? and how much is it likely to cost both to install and to run? Options under consideration: Mono block ASHP + UVC (perhaps 400 litre) issues legionella Split ASHP + Sunamp stack (6X2) LPG gas boiler with UVC (and buffer for UFH) We are in Northern Ireland so no RHI and PV is no longer cost effective (vs E7 electricity) A gas boiler is likely to have the lowest capital cost and should be good for 20 years, I'm not sure how long an ASHP would last, long enough to justify its cost? I'm attracted to the Sunamp system but it is very 'capital heavy' and if the ASHP fails or needs expensive maintenance then I would be better just going with a gas boiler, but the Sunamp would be better placed to accept PV input if they become cost effective. All opinions welcome,
  9. Roger Lindley

    Hi from Passivhaus selfbuilder

    Hi everyone, I'm a "mature" retired electronic/electrical design engineer come computer networking consultant come PH self builder. See following link for existing building details. http://passivhausprojekte.de/#k_4186 Currently designing second PH for construction in Brinkworth, on Woodbridge park golf course. Build commences 2nd August. Also designing next door neighbours from PHPP perspective. Scandanavian Lodge design ( planning requirement), Isoquick insulated raft foundation, Beco ICF walls (polstyrene lego bricks according to my wife!), attic trussed warm roof. Approx. 240m2 and 550m3 gross including voids which are within thermal and airtight envelope. Techie bit. Hmm.. The intension was to have very similar to current house as it works well! However no mains gas so all electric. MVHR to be a Paul Novus 300 with Lindab rigid safe ducting, silencers etc. Thermal store to be Akva Nero 750l (current house has Akvaterm std tank of 500l with top and bottom DHW coils giving up to 35l per min). Change of size result of no mains gas and probable use of Eco7 electric to supplement Solar PV via Immersun PWM switch to two high temp immersions. Space heating via VEAB CCW 125-6-2.5 in living area duct branch only - no active heating to bedrooms. Summer active cooling via VEAB CWK 125-6-2.5 in bedroom ducting only or VEAB CWK 160-6-2.5 for all areas... 3kW ASHP air to water supplying the VEAB CWK. Secondary DHW loop to provide "instant" hot water to all areas with little potted water wastage (as per current house). Well that was the plan until I discovered Sunamp and Zehnder Comfocool Q600! So undecided now although no apparent pricing/availability of Sunamp Stack.... Sunamp PV 5kW units look good but only a fraction of the capacity of a 750l TS. Multiple units look very expensive by comparison. However, need to make a decision soon I guess.......