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Viessman Vitocal 222G - Ground Source Heat Pump
https://www.pv-magazine.com/2023/03/02/viessmann-unveils-ground-source-heat-pump-for-space-water-heating/ SCOP of 5.4 and a flow temperature of 65 deg C/ 58 deg C for Hot Water. Impressive!
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warranty issue with ASHP which is no longer working
An ASHP system has stopped working towards end of manufacturers warranty. Installers were investigating possible causes of issue. Turns out it is in fact the heat pump with the issue. Warranty period is now over and the manufacturers were not informed until this point. They insist the warranty begins at date of sale and…
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UPDATED: Air Source Heat Pumps/Air Con - Full Info & Guide, is it cheaper to run than mains gas?
I have put together with information on reverse cycle air conditioning (heat pumps), where people can ask questions, chat about heat pumps, discuss experiences, installs, electricity usage & anything else heat pumps related. There's a lot of info here to take in, please do read it all as this may just help. However, if you…
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GSHP vs PassivHaus
The average COP of a GSHP is around 4.5. I require 15000 kWh of gas for the year or 3333 kWh with a GHSP. Both a GSHP and PassivHaus cost around £30K but Crucially you can keep "adding on" to a retrofit PassivHaus. You don't need 30K upfront or via a loan. My house is 120 square metres At 15p/kWh that's around £500 for the…
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New GSHP Efficiency?
Hi there We finished a self-build last year. We fitted a Kensa Evo 13KW Ground Sourced Heat Pump (GSHP). We moved-in in June so only started using the GSHP and UFH at the end of October. The house is large (~4000 sq ft) with UFH across the ground and the first floor. Now I know we're in the middle of an energy crisis but…
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air source heat pump
hi all, not clear on energy at the moment but after some advice please. i moved into my one bed new build house in 2021 i am disabled and on higher rate pip and universal credit due to mobility issues (due to the above they have told me i am not entitled to the warm front payment of £150 this year) i do not work and it is…
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GSHP CoPs and Vertical Bores
Hello everyone We have a Vaillant 10kW GSHP with flow temperature (UFH) of about 36 degrees. However, it's only running with a CoP of about 3.3, which seems quite poor for a GSHP. The ground loop consists of two vertical bores, each to 100m. The system was installed by the previous house owners, and I believe them (despite…
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ASHP with heat battery
So let's say you've got a heat pump and a Sunamp battery, or similar for that matter Could you use Sunamps to heat the house? The rationale would be to "charge" the sunamp battery at night, connected to the heat pump. Ie: Night time tariff = 12p/kWh You require maybe 80 kWh (on a bad day) worth of energy in a day, so you…
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ASHP vs GSHP
I haven't got money for either at this point, and realistically there are better energy upgrades I can do before getting any kind of heat pump Let's say you've got money for both. Which would you go for? I don't have the land to have a horizontal loop, but I can have a verticle loop which obviously adds to the cost It does…
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ASHP - Pipe size
Let's say you don't have good insulation Could you theoretically still achieve the same low flow temps with oversized pipes, and oversized rads? Obviously, you should insulate your house anyway, but I was wondering if you'd basically achieve the same COP without having done that? And then basically having pipes that are…
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Heat Pumps
Currently Octopus have a ‘ Cosy Energy tariff which looks beneficial to those with a Heat Pump. 2x 3 hours =6 on cheap rate, and 3 x hours on peak rate. The rest is on the standard rate tariff.
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ASHP / Ecodan / Melcloud - new owner
Hi everyone, Our new Mitsubishi Ecodan air source heat pump was installed yesterday, and all seemed fine. Woke up this morning and looked at the report to see it seems to have turned itself off? The Melcloud app says "the unit failed to respond to the refresh" and shows a graph suggesting it isn't speaking to the system…
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GSHP, Bypass and Buffer Vessel
Hey Guys - when my IVT HT Plus E7 was installed in 2009-10, the installer (my own plumber) added a kind of Bypass and as far as I'm aware - it's an old trick that plumbers have done for decades - left it half open. I guess this was for circulation pumps, so they're never circulating against a closed valve. I have since…
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Air Source Heat Pump for Garden Room
We have a garden room which we use as an office. The current system is powered by an LPG boiler via a 47kg propane bottle. It has underfloor heating throughout. The boiler is now 8 years old and has become very unreliable, with an internal leak now. Its also frustrating having to replace the gas bottles. We are considering…
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Cost of electricity a day whilst running air source heat pump!
Hey, so out of curiosity those who have a air source heat pump how much are you finding you are paying a day to run your electricity we have now hit £11 in the last week as temperatures have dropped to single figures and this is scary as it is only going to get colder and therefore higher bills. We have only had the ashp a…
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Air source heat pump problems
Hi all, Rather naively we recently moved into a house in the Highlands heated by an air source heat pump under the impression that they were pretty economical to run etc etc. Long story short a month in ,with the thermostat set at 17 it's costing us about £25 per day to run( about 50kw plus per day). For context we are…
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Ecodan ASHP heating not working
Hi As per the title, we have hot water but no heating. With reference to this thread (I've added spaces as I can't post links) https:// forums.moneysavingexpert.com /discussion/6402486 /mitsubishi-ecodan-ashp-no-heating/p4 I have checked: - desired temperature is set to 22 but it doesn't get above 16 - paused water so it…
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Cost to run a Air Source Heat Pump
Hi iam looking for some info on my ASHP if anyone can advise . I have a Mutsubushi / Ecodan ASHP with PV panels & UFH which i installed when i done a major refurb 2 years ago . I have been collecting data on the cost for over a year now to see what it is & how it compares to normal heating . I live in the postcode RM14 ,…
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ASHP question
Our Ecodan is set so that between 11pm and 5am the heating does not come on, nor the hot water. Yet almost every night something is humming away in the off hours in the vicinity of the water cylinder - anybody have any ideas what that could be? It's been happening consistently since mid-September when I changed the…
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Benefits of hybrid heat pump systems
Hi all, I wanted to share my bit of knowledge and experience on hybrid heat pump systems. This is when you do not need to remove your existing gas boiler, but pass control over it to a new heat pump controller. A small heat pump is connected in parallel with the gas boiler to your existing heating piping. The controller…
