Pete lea

I think the general consensus is that moving away from Gas is a bad idea unless you can get an efficient ASHP/GSHP with at least a SCOP of 3. The issue was our Microbore pipework and newly decorated downstairs and my wife didn't want to ruin that. Our upstairs carpets need replacing so perhaps we could take up some floorboards and replace the pipework that way, is this a common method? Or has anyone installed it this way? I'm going to not make any replacements to heating this winter and focus on reducing our output (insulation + MVHR). I'll contact an ASHP installer in the new year and see what they can do. Thanks for everyones help.

I believe Octopus Go is still at this rate? Although it may have jumped up since, I'm fixed till may 2023 but hopefully going to switch when my Batteries and Solar PV get installed.

I assume if the newer ASHP can reach 60°C then I could keep my microbore piping and radiators? (perhaps upsize radiators as well) and it could run off the stored energy from my batteries which will be cheaper per KW than gas? Even if it's only at a Scop of 2.

I could lie and say eco reasons etc, but really I just don't like it, I didn't want my kids cooking with it (switch to induction and electric ovens already) and I don't like the small chance that it could leak carbon monoxide (even though we have a detector and have regular services etc). So not necessary a logical argument for most people.

Is this because the demand for heating is just way more than hot water? I know they're a lot more expensive - more than I was wanting to pay for sure!

it says 76 - c, with a potential 86 - B (not sure what that means). The extractor fans in both upstairs bathrooms have seen better days... i'm not sure one even works properly. Both bathrooms need to be replaced - they're the last rooms that need renovating. I honestly have no idea - it's a potterton powermax HE and it just has a dial on it with no numbers (it's about 80% of whatever the range is). We don't have UFH and we basically replaced our downstairs radiators a couple of years back, although they were mainly chosen for aesthetics than performance, a mistake on my part. They seem to work about as well as they old ones did but I wish I'd got larger ones thinking about it now. I think I just looked at one of the diagrams for that sunamp to see how it was configured and said "yeah that's the one I need". Something like the picture below but without the heat pump I can't find many installers for the Sunamp though although the videos I've seen have all been largely positive. I'm space constrained so the idea of stacking a couple of these on top of each other for 400+ L or hot water with minimal heat losses (advertised at least) seemed like a good idea) with just enough room to put a slim boiler in there. Unfortunately there's not enough room to put a big cylinder and a boiler in the same cupboard. What i'm confused about is people telling me to switch our the sunamps for a water cylinder, I thought they were meant to be direct replacements? For example, I can get a mixergy 300L smart tank but I can get the 300 Sunamp (meant to be 284L) and combine it with another one for way more (maybe 400-450L). The advantage being that I could also use this extra capacity to help with heating? but I think the general consensus is that this wouldn't be enough anyways? I'm definitely going to get some pros in to do the installation - I'm just trying to think through some options that would work for our house.

That looks pretty complicated and I'm not sure I trust myself to do those calculations properly when my plumbing skills extend to being able to replace a radiator. The company that's doing my Solar PV also specialise in ASHP so I might shoot them an email so they can come and do a survey.

To answer some of the other questions/additional info: The house was built in 2007 and has okay insulation, but I want to maybe looking at some additional cavity insulation if possible as well as some additional roof insulation once all the work is done up there. I'm also looking at an MVHR (mainly so my wife doesn't open every window in the house every day for fresh air while I freeze to death). I think we can also put a bio filter in this system as my youngest daughter and I suffer badly from Hay Fever each year. I'm looking to schedule in the Solar PV and Batteries as soon as possible as all the companies are getting so many enquiries and my fixed tariff ends in May I'm getting 3 phase power upgrade in 8-10 weeks so I can draw as much as I need in the 4-5 hours at night. If all goes well with the night-time tariff pricing we might sell our car and go full electric as well. I've been quoted 7200 for the ~6kw solar PV install and 15300 for the 2xPowerwalls which I think is pretty reasonable. These are the only things I've made a decision on so far as I think they're a no-brainer for us. We have full LED bulbs throughout the house and new fridges/freezers (we've been renovating the entire house). I need to expand and insulate loft hatch before all the work gets done up there. I would definitely go for an ASHP if I thought I wouldn't have to rip my entire house open to do it.

I'm not sure ASHP is an option, I have microbore all through the house and I don't think I could take them opening up all the walls to replace them and would probably have to replace all my radiators as well. I've read that it might be doable though with microbore but they have to up the flow rates? Does that sound right? Perhaps it would be worth getting a company in to do some calculations.

Unfortunately that's the maximum size Solar PV array they can fit on my roof They're looking at maybe sourcing higher watt panels to eek out a bit more though but it won't be much more. Our current electricity on a non time-of-use tariff is looking to be astronomical (650+ then maybe 800+ a month...) so I think the batteries will pay themselves back within the 10 years if I can get the majority of my electricity at 7.5p/kwh as opposed to 30..40..50p/kwh+ (or whatever it will stop at).

We have a 4 bed house that's reasonably well insulated. Our family uses quite a lot of electricity already. I work remotely from home and my wife is home all day and both my teenage daughters need to be illuminated by at least 2 devices at all times whenever they're here. Having said that, we want to get rid of our old gas combi boiler and electrify everything. We're getting Solar PV (6kw+) and 2 Tesla Powerwalls for around 28kwh of battery storage. The idea is to charge up the batteries as much as required in the 4 off-peak hours and try not to draw any excess from the grid during the day. I want to apply this same logic to my heating (Worst case scenario we were using ~70kwh of gas a day on average during january - does this sound about right?), so i'm looking at getting a Sunamp Thermino (or 2 in series? for more than I would realistically need) and charging them up at night. This will supply my hot water directly, but also be connected to a Heatrae Sadia Amptec direct electric boiler; from my understanding this will pre-heat the water so the boiler doesn't need to put as much energy into it (if any) to get it up to temperature for the central heating. I'd like to try and keep my households maximum output below the capacity of what the batteries can provide (10-14kw peak) so that I don't draw from the grid. Perhaps a 6kw electric boiler? Does this sound totally illogical? The sunamps and amptec were chosen mainly due to the fact i'm limited on space so I can't really have a large cylinder and a boiler in the same cupboard. My worry is that it will be undersized but I figure the heat batteries are doing most of the work. Any insight would be greatly appreciated.