Видео

Thank you - very useful

People needed to see what the joint look like when you machined it

thx

Just stumbled on this video. The best lock-mitre vid I've seen! I have a LM bit [been it the packaging for eons actually] and your video has been the most instructive thing I've seen concerning using one. There are definitely easier ways to make a box, thanks for your instruction. I might have a crack at it...

Its a lovely presentation! You have excellent communication skills. It does show, however, how diametrically different views are on these things. Youll find videos even suggested after this one that absolutely advise against zoning!

Nice thorough explanation of some of the finer points of the installation that most people would never understand.

A couple feather boards for the router table might help.

All this should have setup in the design.

Solar, of course you won’t get much benefit when you really need it. Although if you have an EV that is different. Perhaps putting some investment in a community wind farm makes more sense, if only on a green agenda. Ps, good revue, though I have to admit putting you on 1.25x speed, no criticism, you are just a happy relaxed guy.

Electric cost is linked to gas costs which are similar to oil. So they should in theory both change together. Of course as more renewables come into the equation, electric will be more stable, and we hope less. So ASHP should make economic sense in time.

21deg. Just wondering why you need such a high temperature. In our house 18c is hot. Also, you have radiators under windows with curtains hanging over them, I would relocate the rads, or extend the window call boards and cut the curtains above.

Dumb to put them so far from the load.

Adding insulation, using wood fired heaters, trying to heat the space with 34 degree water so you must install larger/more radiation; did you remember to spring for the Magic Unicorns needed to make all this green nonsense work? Quit playing with yourself and put a fossil fuel boiler back in or you will be cold every Winter and very broke.

How does this work for a air handler system and not radiators? If a system is rated for a COP is that at a certain temperature?

Interesting video for sure. If you were very happy with saving 10 quid a day by tweaking your heat pump temperatures then your electricity bill must be absolutely monumental?? It seems a common theme with honest heat pump videos like yours is that if you do not own a solar system - it's no cheaper than oil a lot of the time - especially if you factor in the fact that your existing oil system is working fine, it doesn't make sense to me to then go spend £10k on heat pumps just to save a few quid here and there in bills? Lots of people seem to be doing just that nowadays! Get as much solar as you can fit ASAP and watch your bills drop like a stone.

Thank you for your review of your Air Source Heat Pump system. Very informative and honest review of the system you have. Very well presented and lots of valid general points about making the house comfortable and efficient. e.g. zoning. Forward thinking in the planning of future developments regarding ducts for solar cabling. Wise advice on choosing a contractor!!

Very interesting, thank you from a Dutch viewer. I have the same problems with my Daikin heat pump.

Had one, will never have one again.

Save the planet with a wood burner?

You won't be able to power your ashp completely from solar in Dec and January as there is just not enough hours of sunlite. I have 3.5 kW of solar and am putting in another 12 kW ground mount and 35kwh of battery but I still expect to have to buy electricity on about 90 days a year using the cheapest tariff I can find and I'm heating with gas.

Ground source would be a better bet in a property with the land. COP much better in low temperature conditions.

very nice job with the video. I would ask if you have considered the cost of professionally cleaning the heat pumps because that will greatly affect your COP. Also, do you have a budget for service when the need arrises?

I agree, BRILLIANT Happy for you.. But , let's get it right.. Only those with enough excess CASH can live this life. YES IT CAN WORK but only after huge fiscal input. All of the videos feature the same people. Nothing wrong with these people, good people. But the up front cost is huge .

Do yo have a figure for the COP over a year? Also does the heat pump system control on the flow temperature to the house or the return water to the heat pumps? Well presented video. Hot water circulation: since the far outlets are on a common source with those in your kitchen then the time to get hot water can only be influenced by the length of “dead leg” to each outlet. It’s common to take circulation right up to outlets but those outlets in the Kitchen probably don’t have any circulation to them resulting in a longer time to draw off cold water in their dead legs.

This adds a whole new level to heating - not simply adjusting the thermostat. But looking at predicted weather and making adjustments

Thank you for documenting your experience with your ASHP installation. One aspect you did not major on is the difference in comfort you have experienced. I should imagine that with ASHP and the underfloor heating your house is much better all round. I do lament at the avalanche of negative comments that you have suffered, although I expect it is all ‘water off a ducks back’. I do have a few comments though. 1. I am not sure why your installer chose to zone the property (using zone valves) as it considered best practice to have one open zone and control at the manifolds (in order to prevent short cycling). 2. On the solar front, I do not know if you have moved on (as this video was a year ago) but it is most unlikely you will be able to support ASHP(S) in winter (Min Solar production/Maximum heating demand) - although I have not seen the size of your field. It is semantics but it is best to look at solar production as an annual exercise that you net off your electrical bill from the supplier).

If you got a large battery and charger it at 12p. Then run the heat pump off that

It's incorrect to say you need insulation to run a heat pump. It's simply not true. I was at a wedding where a teepee was heated with a heat pump. 0 insulation. Just need to match your emitters to your heat loss. Does reducing your heat loss make your bills lower yes. Is that true for other heat sources yes. Is it especially true for heat pumps? A little bit. They do work better on an always on trickling in heat basis, but essentially you just need wider pipes and a bigger radiator and could still be efficient and cheaper than gas heating. It's myth.

wait, isnt that the house Artisan Electrics rewired some months ago?

Just received an £3500 quote for a new oil tank installation as it needs moving and replacing due to regulatory changes. Team that with an 20 year old boiler, I'd be in for at least £10k.. So been looking at ASHP for a while, main benefits I don't have a commodity in my garden which could be stolen, yes electric is expensive but when crunching numbers over filling my oil tank, having it replaced, running the heating etc then ASHP is a no brainer. Just spend some time draught proofing your home if it's old like mine.

Are you making dhw with your ashp? Thank you John.

Thanks for the explanation. Was the clip of the defrosting in real time?

as with all builders i would beware of asking anyone what they suggest, especially with these new technologies, people are not trained, or if they are they lack experience or they have a narrow view and just do/sell/promote what their brief training course has taught them

save yourself 17 minutes......they are DOGSHIT

Yeah…no thanks! Too expensive, too complex and too inefficient. 👎🏻

Thank you for sharing. Brilliant information

Very interesting thanks for sharing

The installation is very expensive, an existing build will require larger radiators, copper pipes and they cannot be hidden. More electricity is required to run them and you still need a back-up source. NOT FOR ME.

You cant be that worried about heat or energy having all that open space and windows everywhere lol

Better off buying a diesel heater off aliexpress and run a vent in to your house, it cost pennies to run and any tom, dick and harry can install and maintain them. You can even use veggie oil, waste oil, red diesel in them, not that you should but you can and its cheap.

You have a plant room in your house, that could have been an office or gaming room. 😒

As a solar installer, I can only share that the sooner you install PV the quicker the payback. My advice would be to avoid Chinese brands and stick to well reputed panel manufacturers like Sharp, Hyundai, Solarwatt, REC, ALEO or Panasonic and Inverter brands like Enphase or SolarEdge. If a battery is on the cards, I'd suggest Tesla or a MyEnergi Libbi as the most future proof solutions.

I love the fact people say that you need a REALLY well insulated property for ASHPs to work well. They then compare running costs to the system they replaced that was trying to heat a poorly insulated property - not really a fair comparison! Clearly, any heating system will work better and have lower running costs if the property is well insulated. Let’s be honest, you would have saved lots more money if you just chose to insulate your property properly and continue with your oil fired system!

Informative video and although a bit technical I could see how you approach your own situation. We have 3 ASHP's in our bungalow and have them set to go no higher than 18c ,we rely on these units as our boiler and rads are now decommissioned and scheduled to be fully removed next year. We're looking at solar and battery tech for our next project. A question on your ASHP's, why are they positioned in your garden area instead of fixed to the main house ? Is it due to your house being of a certain age ? Peter

@ Modern Thatch Living. Firstly, thank you very much for such an informative video; there are very few posts with this level of analysis, so I really appreciate your effort. The question I have relates to your "Example calculated flow temperatures for our system..." graph, with time stamp 8:39: are you showing return flow temperatures (for example 29 degrees at 0 degrees outside) or heat pump-generated input temperatures into the manifold? Many thanks.

The margins between an oil fired central heating system and an air sourced heat pump at the moment seem to be small and constantly moving. Given that the savings/year will not be vast I would suggest that a changeover of heating system should only be considered at a point where a replacement of an oil boiler has become essential. Like cars one of the biggest costs of heating systems is that of depreciation. Unlike a car the value of a secondhand oil boiler is minimal as the cost of installation probably means that most people would rather buy new than take the chance of installing a secondhand boiler. This means that there is no or very little offset against the cost when purchasing a replacement heating system. Therefore it is probably a waste of money at the moment to change ahead of the end of life of the boiler. If a an oil boiler is about 90% efficient and the price is 90p/litre, as the heat energy in one litre of oil is about 10kwh, electricity would need to be below 8.1p/kwh for conventional electricity heating. For a COP of 4 this would become about 32p/unit which is much more achievable. Given the present fluctuations in the energy market I guess it will be at least a couple of years before we can make meaningful decisions on our choices of heat energy from an economic point of view. Certainly even if we just break even the air sourced heat pump would be a good choice from an environmental point of view.

Currently I'm paying 24.7p per kwh for electricity and 10.4p per kwh for gas; my 35 year old boiler is 80% efficient so in effect I pay 13p per kwh to heat my house with gas. I think in future gas will increase in price faster than electricity as green levies are placed on fossil fuels. 2 years ago I had rooftop solar and a powerwall installed which generates about 5500kwh per year, I currently export about half of that amount to the grid. Next year I plan to get an ASHP (probably a Vaillant) and hope it will be able to get a SCOP of around 3.5. My excess solar should go a long way to cover the cost of running the heat pump. I would definitely recommend solar and a battery to anyone with a heat pump.

Great presentation. Very interesting. Why did you discount ground source heat pumps?

I didn't quite catch the name of the fan unit in the room with the wood burner in. Could you provide a link in the description please.

the 500-pound gorilla in the room is the cost of maintenance and service of your air to water heat pumps. Everything gets dirty as it runs, and the efficiency will drop as it does. Why people don't mention this is puzzling to me. You seem to have covered all of the bases nicely with your preparation and I enjoyed your video, but what about that gorilla?