The water pressure at the taps depends on the pressure into the house. We have to reduce the incomming pressure to 3 bar so as not to exceed the cylinder design pressure but some houses have very poor pressure.
We’ve always had very good cold water pressure, but as our hot water was gravity fed and the tank was at the same level as the upstairs taps it was always pretty poor. Now that the tank is pressurised, it feeds hot water to the taps and almost exactly the same pressure as the incoming cold water. So everyone’s happy all round.
Enjoy watching your videos, they are very interesting. Just embarking on the my solar and heat pump journey. Solar installed this week just waiting for it to be fully commissioned, delay with the heat pump as my electricity supply is on a loop with next door and need a separate supply. Spoken with the DNO and they said they have up to 12 months to carry out the work so frustratingly on hold with the supplier of the heat pump until work is carried out.
For anyone watching this and thinking they don't have room for a big hot water tank, there are space saving options available. They are not quite as efficient but will solve the space problem.
So the Tank they were originally going to install wouldn’t fit into our airing cupboard, after a few frantic phone calls they managed to locate one that was the same volume just slightly taller they would fit in the space.
Slight slip up at 1:45, you say for those with a condensing boiler, you mean a system boiler. Combi boilers are also condensing. PS. Another survey tomorrow. I'm really hoping to avoid all those pipes, and losing the airing cupboard.
I always wonder why they dont have a crane in solution of heat pump and insulated cylinder with all the pipework and valves put together offsite so only pipes and electrics need to be hooked up. Surely it would be cheaper to assemble off site, not take the best part of a week to install and might actually work in small properties with no spare space that currently just have a combi the size of a small wall unit.
I think it’s because it would limit the number of houses that it could be installed in, even with their detailed survey they still ran into a number of things that require a’ fix’ to fit it into the house. Mines a relatively modern house I would imagine with old houses it would be even more cumbersome.
Good vid JT. My son's recent HP install needed a horizontal HW tank in the loft & a larger loft hatch to get it up there. Not ideal but there was nowhere else to put it to replace the old vented dumpy 36" x 18" IMI Hercules tank.
Around Christmas time we found our hot water temperature dropping quickly. My Home Assistant gets the temperature directly from heat pump, not the API. We could also hear water running in the volumiser. Turned our pressure had drop to zero. Set it back to 1.5-1.6 bar and the volumiser was silent again and the tank temperature back to normal. Just an FYI.
I think they might be relaxing the rules on what you need already completed in terms of insulation before you are eligible for the BUS grant, not sure. My heat pump is coming next week! Scary but I'm looking forward to it!
I understand why we have listed buildings, but I never understand why we have to maintain them and keep them as these cold relics, insulation and heating should be modernised to allow these very important old buildings to survive but also be livable
Was primarily done to make the pathway to heat pumps cheaper in an attempt to boost numbers. Some would be looking at £thousands to meet the MCS requirements. If we want to reduce CO2 levels as quickly as possible it is the best route.
Just had my Octopus survey today 7.1kw needed. Not sure if that's 7.1kw per day or what? How much battery do I need to support that? (That's my next investigation - Battery or Solar or both)
7.1 kW will be the heat output from the unit, not the amount of electricity that it uses. I have a 6 kW Heat Pump and on the coldest day in January it use nearly 24 kWh of electricity, however that was spread over the day. It never peaked above 2.8 kilowatts being drawn in real time. I know that sounds like a lot but on the more mild days it was using about 8 to 10 kWh for the whole day.
This is extremely useful. Lots to think about and nicely explained. ❤
Thanks 🙏
The water pressure at the taps depends on the pressure into the house. We have to reduce the incomming pressure to 3 bar so as not to exceed the cylinder design pressure but some houses have very poor pressure.
We’ve always had very good cold water pressure, but as our hot water was gravity fed and the tank was at the same level as the upstairs taps it was always pretty poor. Now that the tank is pressurised, it feeds hot water to the taps and almost exactly the same pressure as the incoming cold water. So everyone’s happy all round.
Enjoy watching your videos, they are very interesting. Just embarking on the my solar and heat pump journey. Solar installed this week just waiting for it to be fully commissioned, delay with the heat pump as my electricity supply is on a loop with next door and need a separate supply. Spoken with the DNO and they said they have up to 12 months to carry out the work so frustratingly on hold with the supplier of the heat pump until work is carried out.
unfortunately DNOs are a law unto themselves, they know you can’t go somewhere else so don’t have to provide any level of service
For anyone watching this and thinking they don't have room for a big hot water tank, there are space saving options available. They are not quite as efficient but will solve the space problem.
So the Tank they were originally going to install wouldn’t fit into our airing cupboard, after a few frantic phone calls they managed to locate one that was the same volume just slightly taller they would fit in the space.
Yet again another very informative video and the tips will come in handy in the very near future when I get a heat pump installed. Thanks again JT 👍
Glad to help👍
Excellent stuff as always Jonathan
I appreciate that👍
Thanks JT good vid. With the removal of the cold water tank, can I assume that cold water pressure throughout the house is at mains pressure?
That is correct, the tank was only supplying upstairs taps and the hot water system
Great video Jonathan. Not to much information in one go. Gives us future HP buyers time to divulge things. 👍
Yep trying to keep it easy to digest, glad it was useful
Another Great video. Thanks. Keep em coming!
Thanks, will do!👍
Slight slip up at 1:45, you say for those with a condensing boiler, you mean a system boiler. Combi boilers are also condensing. PS. Another survey tomorrow. I'm really hoping to avoid all those pipes, and losing the airing cupboard.
oops my bad, good luck with the survey
162 litre tank is 40 US gallons. My house (in Colorado) has two 50 gallon tanks. Which I always felt was overkill.
i suspect you have more people using hot water than we do
Thanks for vid. I don’t know how they would fit in our loft, because it has cross members with no floor floor space or anywhere to stand!😂😂😂
Yeah my issue would be hatch size, plenty of space up there just not big enough hole to get the tank upstairs
I always wonder why they dont have a crane in solution of heat pump and insulated cylinder with all the pipework and valves put together offsite so only pipes and electrics need to be hooked up. Surely it would be cheaper to assemble off site, not take the best part of a week to install and might actually work in small properties with no spare space that currently just have a combi the size of a small wall unit.
I think it’s because it would limit the number of houses that it could be installed in, even with their detailed survey they still ran into a number of things that require a’ fix’ to fit it into the house. Mines a relatively modern house I would imagine with old houses it would be even more cumbersome.
Good vid JT.
My son's recent HP install needed a horizontal HW tank in the loft & a larger loft hatch to get it up there. Not ideal but there was nowhere else to put it to replace the old vented dumpy 36" x 18" IMI Hercules tank.
good that they found a solution, if we couldn’t have got the taller tank that is what we would have had to do
Around Christmas time we found our hot water temperature dropping quickly. My Home Assistant gets the temperature directly from heat pump, not the API. We could also hear water running in the volumiser. Turned our pressure had drop to zero. Set it back to 1.5-1.6 bar and the volumiser was silent again and the tank temperature back to normal. Just an FYI.
yeah haven’t found a solution to checking the pressure remotely yet so have a 2 weekly reminder on my phone to check it
@@JonathanTracey Home Assistant and ESPAltherma 😉
Thanks will take a look
@ Feel free to reach out if you have questions.
What caused your pressure to drop ?
looking forwards to part 3 :)
thanks coming next friday 👍
I think they might be relaxing the rules on what you need already completed in terms of insulation before you are eligible for the BUS grant, not sure. My heat pump is coming next week! Scary but I'm looking forward to it!
That’s good if they have, but insulation is still the cheapest way to get a warmer house
Good luck,on your install, let me know how it goes
Of course! But sometimes there are listed buildings and things like that; I think that's why they are doing it. Mine's pretty good.
I understand why we have listed buildings, but I never understand why we have to maintain them and keep them as these cold relics, insulation and heating should be modernised to allow these very important old buildings to survive but also be livable
Was primarily done to make the pathway to heat pumps cheaper in an attempt to boost numbers.
Some would be looking at £thousands to meet the MCS requirements.
If we want to reduce CO2 levels as quickly as possible it is the best route.
Johnathan, great video. Hope you don’t mind me asking, do you still have two dogs. 🇬🇧
yep two boys
@ Nice. 😊
Just had my Octopus survey today 7.1kw needed.
Not sure if that's 7.1kw per day or what? How much battery do I need to support that? (That's my next investigation - Battery or Solar or both)
7.1 kW will be the heat output from the unit, not the amount of electricity that it uses. I have a 6 kW Heat Pump and on the coldest day in January it use nearly 24 kWh of electricity, however that was spread over the day. It never peaked above 2.8 kilowatts being drawn in real time. I know that sounds like a lot but on the more mild days it was using about 8 to 10 kWh for the whole day.
@@JonathanTracey So getting a 13kwh battery makes sense as the electricity will be much cheaper in winter and will be exported in summer.
depends on you other loads but in the coldest days of winter it won’t cover 100% but for most of the rest of the year it will be fine