I watched this for the same reason. Urban Plumbers says the opposite, he tries to leave buffers out where possible to increase efficiency. I think the trick is to not oversize your heat pump so that it won't be cycling.

They only turn down to 25-30%, so the larger models still need a buffer

@@hvacdesignsolutions not ours, we only require a buffer (volumiser) if you can’t meet minimum water volume in the open circuit for defrost . A buffer can be useful in larger installations where you have multiple heat pumps cascaded.

@@hvacdesignsolutions then the heat pump is oversized?

The buffer is also useful if you don't want to replace the heating flow and return e.g. if its microbore, the heat pump requires a minimum flow rate which may not be achievable if the ASHP is connected directly to the heating circuit.

The valve is pointless on anything heating water. The heat pump isn't going to get anywhere near boiling and any decent gas boiler has a proper temperature control and an overheat cutout. The spring loaded 2 port valve is just a scam to sell more 2 port valves. Viessmann got dispensation to cut them out.

It isnt a mid posistion valve, its a divertor that motors open for HW call and spring return to Ch. Rest posistion is open to CH.

Yes but you would have the combi boiler as a ‘backup’. I.e if the outdoor temp drops to a low temp the boiler would kick in and boost the system where the ASHP may struggle

Isn't it built into the heat pump itself?

Haha! Yeah the brickwork is so good it felt like I was glueing it up! 😂😂😂

Rodger, forget his heat pump, I'm HEATAS part 4 use the thermal store with a coal fire! lol Sorry Jimmy! 🤣

Plumb the kaunt out of er

Ive trebled and on some occasions even quadrupled my money than doing boiler swaps, lets be honest with each other were in this industry for the money NOT the love of the game. you have to speculate to accumulate, get yourself on the course.

@@johnhine1007 hi John are you able to explain how it works with ‘gas improver/newly qualified’ so I assume you shadow some one for a duration ?

@charliefox6987 there's no gas at all to worry yourself about, apart from maybe disconnecting the odd gas boiler, you do need, however, a basic understanding of heating systems, I've literally been re-piping heating systems from scratch probably a day extra in work and give it a hot chemical flush. I'm not 100% certain, but I'm think you may need to be part of an accredited organisation, i.e., Gassafe or similar and have a few years' experience in the trade to sit the A.S.H.P course don't quote me on it though. My advice would be to ask the training provider. But the money on the A.S.H.P grant scheme certainly outweighs those who fit boilers on the free boiler scheme.

Could use it if you have solar panels?

@@user-cl9uo1eq6q Since this video the same channel has kind of explained a few more things. One seems to be that the use of an immersion heater means you can bring the buffer to a usable temperature and then fall back to the heatpump in cold weather. This is because trying to get a really cold buffer up to temperature with a heatpump alone in really cold weather might just take too long, but if the buffer is pre-heated then the heat pump can keep up.

@@NickAskew interesting, thanks. Do you know if there's any reason that this couldn't be run off a gas-fired system boiler until a heat pump can be installed?

@@user-cl9uo1eq6q In the Netherlands, where I live, combi/hybrid gas/heat pump systems are gaining traction. I'm not a big fan but what it means is that a heat pump can do most of the heavy lifting and then when it cannot cope, the gas boiler is fired up instead. I believe they are usually retrofitted to an existing gas boiler. I'm sure this is not the only country to use them, but my concern is that sooner or later you will need to replace the gas boiler and then if the heat pump is undersized you will need to replace that too.

That it was!

@@leonidasking7502 thanks so much man.

@@leonidasking7502 Don't go telling him that.... he'll send you an invoice for his services. 🙄 Though he does accept Beer Tokens to help pay off his bar tab. 🤣

That's because you are using "plumbers" instead of " heating engineers"

Nah, it's not that tall. James is just a short ass, so stood next to it it just looks ginormous. 🤭

🤣

Bosch do hybrid systems that run alongside an existing Combi gas boiler .

Thankyou!

It doesn't. If anything you'll need bigger rads as using a buffer reduces efficiency due to the heat pump needing to run hotter. Manufactures are introducing buffers as most engineers don't know how to design systems correctly. Having a buffer ensures the heat pump works even on a badly designed system.

Cylinder is unvented, working at same pressure as mains cold water feed.

It's disgusting that you would harm our animal brothers just to harvest their organs for your plumbing. I've chosen not install any form of plumbing in my house to save the environment, infact by shitting on my vegetable patch it helps it grow.

@@maximuswong3092 we only use aborted fetuses to fertilize our garden.

@@maximuswong3092 good for you, a true environmentalist. BUT WAIT.... What enviironmeltally friendly device are you watching this video on ?🤔🤔🤔🤣

@@David-bl1bt iPhone 14 pro max

@@maximuswong3092 What have you done with your old iPhone 13 pro?

Yes...lets see if he has the intelligence to reply to an obvious statement...engage brain motor mouth !

in the attic? i can fit about 10 of those and still have plenty of room

You'll be waiting a long time for that!

@@LewishamPpleB4Profit . I'll wait. The current gas distribution network is worth billions. It will be utilised. I won't be buying a heat pump.

Very unlikely, hydrogen is extremely costly & inefficient to produce.

@@David-bl1bt . U can already buy a hydrogen ready boiler. Heat pumps aren't suitable for the majority of UK homes . Natural gas will still be used till hydrogen is viable. Relying on solar and wind is a big mistake. It will take decades to build enough nuclear capacity.

@@johnh1872 Hydrogen will never be economically or practically viable for domestic heating. Making green hydrogen to burn in homes would take 6x the number of wind turbines compared to heating the same number of homes using heat pumps.

So you can see the failure/water passing is occuring.

It’s also safety device/ air break incase termination is blocked, although the design is terrible and generally cause loads of property damage

The uk isn't warm enough for Aircon

@@matthewmcmullan9669 heat waves. you kidding??

@@dimitar4y we get hot days for a week or two that's it, we don't need to run expensive Aircon units

Why, do they take your dosh then give you something less than what you've paid for? How can anything be a rip off if someone gets the price of a piece of equipment and is happy to pay. If it too expensive, a normal person would look at something else.

@@SME_Ste They took all government subsidies for solar thermal, which we pay for as taxes. Charged enormous rates to have it fitted. Then, when it becomes cheaper, they sold it to the Germans. They sold insulation that wasn't fit for purpose for the grenfell tower. We had to do bribery courses and were told they would be in the news. Later that night the story come out that their insulation shouldn't have been installed in high rise buildings. I done site work on flats that has the insulation on all of them. Apparently there was something dodgy going on with the fire report and the staff were making jokes when engineers questioned if the insulation can be used above 15m. They don't offer proper training to employees who service cylinders and solar thermal. Customers being overcharged by the company due to not training staff in the office. High turnaround of employees. Making customers feel bad during covid for not having the cylinder serviced. Charging £200 per cylinder service to cover a 25 year warranty. Had a leaking tundish for 2 years until I forced them to change it. I solved a problem with their internal expansion vessels where the bar inside the cylinder holding the baffle was bent. Assuming it may have been driven to the plot on site using a forklift laying the cylinder on its side. I couldn't work for them because they just care about money, nothing els3

You are so wrong on every point you made, there is still so many untruths surrounding heat pumps, we need to educate everyone to dispel these misconceptions

AKA you're to poor to buy a heatpump.