Every negative post seems to gets a massive algorithm boost, let’s try something positive 🎉
11kWh of energy used to hold the 21c that the house entered this period at, even through 6-9c outdoor temperature plunges. Not a buttoned up new build, but a 1970s detached with some retrofit insulation and a 5kW heat loss.
Cost on a 3.8p off-peak tariff: 42p. £3 on a standard tariff!
I kinda understood HPs won't do rapid heating like a gas boiler, but have only had one for about 2 weeks, and winter (still mild compared to what.itll be in a few weeks) arrived this week.
Finding it chilly, I changed the set point to 21 deg C around 6pm yesterday when the thermostat read about 19.2... looking at the glacial speed at which the temperature was increasing, I raised the heat curve to 1.4 from 1.2.
From 6pm to 10am, 16 hours, and there has been a total increase in temp by about 1.7 degrees.
Its a big, 15.5 kw Grant heatpump, the property is not badly insulated, just had under floor and loft and eve insulation put in, taking it to mid C band on EPC (btw, these 3 things, added a measly 4 points to my EPC - went from 57 to 70 with HP, and then 74 with the insulation). I'm fairly confident the heatpump is adequately sized for the property (had 3 separate detailed heayt surveys done, all came.in the 13.5 kw range.
Question really is..to all you HP veterans out there.. is this slow rise the usual with HPs, or.is.my system in need.of.some yweaks
For anyone using an air to air heat pump (ie air conditioning) for winter heating: please share your experience!
If I understand correctly, in theory they are more efficient than radiators. However:
So it's not clear to me how the two compensate.
I am thinking of a Victorian house, which has double glazing but is not as airtight or insulated as some newbuilds. And there's no external wall insulation.
Thanks!
Just had a Daikin heat pump installed, solar and battery to follow but until then am I best just running it during my Octopus Go cheap period each evening, and have it turned off the rest of the time, or target 20°C inside temperature 24/7?
280L water tank, so running HW at night every 2nd day gives plenty of hot water, just the heating I want to get right now it's getting colder
Would also love some recommendations on apps to track energy usage, COP value etc. and optimise my experience! Currently have no idea what COP I'm getting...
I've got the econet24 app but can't seem to find anywhere that'll just tell me how many kwh the heatpump has used in a 24 hour period.
Does this exist anywhere?
Paid all this money for a fancy heatpump and the app sucks!
Hello, looking for advice on this quote from Octopus for 9kW Cosy heat pump.
I live in a three-bed mid-terrace house in Southwest england with an old 90's oil boiler. I've gotten a quote from another installer but was unimpressed with the survey whereas Octopus was friendly and very thorough. I'm waiting on a British Gas survey next week.
My main thoughts/worries are that the 9kW heat pump is oversized for the house, a 7kW may be more suitable (Octopus doesn't offer)?
The surveyor said all radiators would need replacing but the final quote has only 3 as they plan on running the heat pump at a higher flow temperature, will this cost more or be less efficient?
There's usually only two of us in the house, sometimes 3. Is the hot water boiler too oversized then, Octopus recommend a size up so our 3-bed has a tank for around 4.
We're a pretty frugal house, switch off lights/electrics etc.
Any other thoughts or recommendations would be greatly appreciated, thankyou!
What is the heat pump thing that Mark Carney just announced. I understood the basic how it work and stuff but is it worth changing? I already have my furnace at natural gas and works really well. so if any HVAC guy can jump in and tell the honest info if it's worth changing or not. is it a better update than the already furnaces we have in market and I heard it comes with AC thing so m not sure is it the same LENNOX type AC thing installed outside the home.
please tell me anything you know
I've had a couple of heat loss surveys, and to be honest the variance on the surveys is scary. One quote had 3 times the heat loss for one room compared to another quote.
If I was to use Bluetooth temperature sensors and got actual minute by minute data for outside temp and individual room temps, is there an app, spreadsheet or formula that I can use to get a more accurate view of the actual heat loss?
Heat geek was going to be my fourth quote after a local, BG and Aira.
I paid the deposit for the heat survey and heard nothing from the engineer until I chased him.
I was given an appointment about a week and a half later for a window of an hour. The day came and the engineer didn't show up. I called him but he said that he was too busy so asked me to cancel and to get a refund instead.
So after wasting two weeks I'm going to have to ask for a refund now.
YMMV of course but I would recommend against using them. All the other companies that gave me a quote were responsive and professional.
those who have such a set up, care to share whether you have experienced any gas or overall energy savings?
i am thinking of installing such a system next year.
thanks
I had 2 heat pump installers coming over recently to produce a heat loss survey and recommend an adequate heat pump system for my property.
Without going into too much detail about the property itself as I don't think it's necessary in this case (but please ask away if you think otherwise), I would like to understand the following:
I noticed both installers used the same software to produce the heat loss survey: it turns out my 4 bed detached has a 6kw heat loss.
The first installer says I need to replace 8 radiators out of 11. His reasoning is that each room has its own heat loss and the radiators need to be correctly sized to produce enough heat for that room.
The second installer says there is no need to replace any radiators. He says that with a heat pump, running constantly, the heat from one room moves to another (through walls, doors, etc) and that produces a uniform temperature throughout the house.
Who's right?
Hello!
So I had my cosy 6 installed by Octopus this week. The install team was excellent and did a great job all round. They have since left and I noticed there is a little bit of pipe work that is not insulated outside. It’s where the blue insulated pipes join the ducting on the wall. Only a few centimetres.
It’s probably totally normal but I just thought I’d check with you guys!
Also, so far my house is lovely and warm and my hot water plentiful. With a COP of almost 6.
This is my first post here which I guess is why I can’t include a picture?
As a side note I am really impressed with Octopus. I also take comfort knowing they will be around to service and maintain it for years to come.
Hi!
We recently got our ASHP fitted. Generally really happy however, we have become obsessed with making it as efficient as possible.
First question - what should our weather compensation look like? I have put some photos to show what it looks like atm.
Second question - I believe our heating is not on constantly and rather cycles on. It might because of unit is slightly too big, I saw recommendation on Reddit to put it water heating on eco mode to help with this. Any other suggestions?
Thanks again for all the help! And apologies in advanced if they seem like stupid questions - please explain like I’m 5!
We've just had the email to say our rates are going up.
Can anyone explain why fixed is worth it? It's more expensive than variable obviously, but our variable rate has never changed within a 12 month period so I'm not sure what the point of fixing is.
I've just heard my BUS redemption notification through post install, declaring that my system has been declared fully commissioned by the installer.
The installer informed me the radiators don't need balancing on heat pump installs - no surprise to me that none of the radiators at the far (cold) end of the house warmed up, and the towel rail first on the circuit got hot instantly. Surely this is part of commissioning?
Having now partly balanced the system myself (just enough to get a tiny bit of flow through the furthest radiators, I don't want to over-restrict the flow in the system) it's down to 18lpm flow, which is below the 25lpm recommended min for the Samsung 8kw heat pump. I don't think this is the biggest issue, except that they've installed a Homely to manage everything (and not configured anything on the Samsung at all - not even the date or time that was default to 2002 - needed for the legionella scheduling) and the homely keeps setting the flow temp to 30C in this mild weather, unsurprisingly this just results in compressor cycling, my guess is 35C would be a better minimum to call for?
Should I require the installer to sort all this out ASAP in accordance with the BUS declaration? It was clear the actual plumber didn't understand the heat pump config, just followed a list of instructions that someone else in the company had worked out. Am I just being fussy, would this be expected to be fixed once temps drop, in slower time?
Any homely installers here that can suggest things that might not have been done (like set the min flow temp on the Samsung itself).
Hi, I recently have Grant installed by Octopus. It uses ecoNET24 app to control. Until last 2 days, the heating is not fired due to mild weather. My temperature setting is 21/Day, 18/Night. Last two days, I can see the temperature is maintained at 21 all night from the ecoNET24 app. Does anyone know why? And I also couldn't find any information/setting about what exactly is night period. Can it be modified? Before I call Octopus support, just check whether someone here know the answer. Thanks.
Hello,
I got solar panels installed earlier this summer and now want to explore heat pumps. Can someone make recommendation for suppliers to carry out survey, calcs and quote.
Heat Geek seem to be mentioned a lot but also recently seeing mixed feedback on this sub.
3 bed, 1930s semi-detached, general insulation is poor. But will be improving such as cavity wall and maybe floor insulation as it’s a suspended timber structure.
Maybe worth mentioning boiler is only 3-4 years ago. Should I wait for it to get a little older? But also seeing gas prices through the roof so I think heat pump with solar battery setup compliments each other well.
Am I right in thinking that I’d not manage to install the unit due to this small window? Thanks
A friend has give me his quote and the design details, and what struck me was he’s got a lounge with a gas fire and the installer is including it to cover the 25% of the demand. This doesn’t feel right, I read MCS 3005-D, where it mentions electric supplementary heating cannot be considered, but nothing else?
Is that actually allowed?
We have Daiken air to air heat pumps in our all electric flat which have been an absolute lifesaver over summer. As we now approach winter can I ask other users how they use them? Do you keep them on low all the time? Only use them when you’re in the room etc? We’re a top floor marionette and have an EPC of 79. Any advice would be appreciated!