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October 20 2021 9.40pm

Air Source heat pumps

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View doi209's Profile doi209 Flag Fighting for the weak and innocent... Yesterday 11.17am Send a Private Message to doi209 Add doi209 as a friend

I am not too sure if these will be acceptable to the country.

It will mean having a big, noisy box outside. Ignoring the aesthetics of the sight of the box, the noise will annoy the residents and neighbours.

In 2009 I had a ground-source heat pump installed in a newly converted barn with underfloor heating. They worked well together as the temperature required was lower for underfloor than radiators.

Maybe technology has moved on, but my compressor and heat storage took more space than two domestic fridge/freezers.

Finally ( and this is the really stupid thing ) when I recently sold my barn the EPC was down-graded as it used electricity to drive the GSHP. It would have been better if I was using gas.

In 2009, it cost me 10k to try and be more efficient. The underfloor heating was great. The new home has a gas boiler and radiators and will work out cheaper to run. It is warmer too.

This new initiative is a knee-jerk reaction to the current crisis.

My advice......avoid.

 

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View Behind Enemy Lines's Profile Behind Enemy Lines Flag Sussex Yesterday 1.14pm Send a Private Message to Behind Enemy Lines Add Behind Enemy Lines as a friend

Totally agree. This has the makings of a typical Government spin exercise of a loud fanfare and everyone jumping on the momentum of the bandwagon to guilt the public into doing this. Except...remember how we were all told to buy diesel cars a couple of decades ago. Now the science says otherwise so I too will be avoiding this and relying on my new gas boiler (installed just over a year ago). Thanks but no thanks.

 


hats off to palace, they were always gonna be louder, and hate to say it but they were impressive ALL bouncing and singing.

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View Forest Hillbilly's Profile Forest Hillbilly Flag in a hidey-hole Yesterday 4.41pm Send a Private Message to Forest Hillbilly Add Forest Hillbilly as a friend

Typical badly-thought knee-jerk, headline-grabbing,... tosh

 


,.,.,..,

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View dannyboy1978's Profile dannyboy1978 Flag Yesterday 5.03pm Send a Private Message to dannyboy1978 Add dannyboy1978 as a friend

These will be about 3500 when available next year.
Hardly rocket science to microwave your water!what a great idea and a British invention
[Link]

 

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View Stirlingsays's Profile Stirlingsays Flag Yesterday 5.09pm Send a Private Message to Stirlingsays Holmesdale Online Elite Member Add Stirlingsays as a friend

Originally posted by dannyboy1978

These will be about 3500 when available next year.
Hardly rocket science to microwave your water!what a great idea and a British invention
[Link]

Makes you wonder why this route wasn't chosen decades ago.

 


'Who are you and how did you get in here? I'm a locksmith. And, I'm a locksmith.' (Leslie Nielsen)

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View ASCPFC's Profile ASCPFC Flag Pro-Cathedral/caravan park Yesterday 5.15pm Send a Private Message to ASCPFC Add ASCPFC as a friend

Originally posted by dannyboy1978

These will be about 3500 when available next year.
Hardly rocket science to microwave your water!what a great idea and a British invention
[Link]

You can just put your wireless router next to the water tank.

 


I used to put the manager's name in front of Red and Blue but got fed up with changing it. If someone cool becomes our manager then maybe..

Red and Blue Army!

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View BlueJay's Profile BlueJay Flag UK Yesterday 5.46pm Send a Private Message to BlueJay Add BlueJay as a friend

Originally posted by dannyboy1978

These will be about 3500 when available next year.
Hardly rocket science to microwave your water!what a great idea and a British invention
[Link]

That sounds like a significant drop, so I'd welcome it. No such thing as a free lunch in this country though (well.. for most), so my cynical take would be that they'll be about 5k in a years time and the grant will have disappeared! Hopefully I'm wrong though, as this definitely looks like a positive step forward.

 

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View cryrst's Profile cryrst Flag Chatham Yesterday 7.22pm Send a Private Message to cryrst Add cryrst as a friend

The main problem is that the temperatures aren't the same as gas boilers deliver. Typically 82*c flow (out water temp)
and 71*c ( back water temp) return water temperature to the boiler. Hence the present radiator sizes required to heat the space ( room volume). Heat pumps deliver about 65*c flow which will mean up sizing radiators by at least 50%.
Ie a single will be a double and a double will be a treble. That's if they are sized correctly of course. Later for the basic calculations.
The outdoor units are much quieter than the older ones but take up a lot of space and still need power to run. An average of 8kw at the low end. That's 32 amps and many fuse boards are at the limit now so compared to a boiler at max 5 amps there are problems with the 'load' already.
The calculations for radiator sizing which I use are.
Living and dining rooms 5 BTU per cubic foot.
Bedrooms 4 BTU per cubic foot.
Bathrooms and ensuites 3 BTU per cubic foot.
BTU = British thermal units
3412 BTU = 1 kw or 1000 Watts.
Ie a lounge 10ft long x 15ft wide x7ft tall.
10 x 15 x 7 = 1050 x 5 = 5250 BTU or thereabouts
Different calcs for different rooms but same process.
If your heating with a boiler needs to be on longer than 20 minutes to warm your drum your rads are undersized I'm afraid.
I oversized mine by 20 % so 5 minutes and my place is steaming.
Most merchants brochures have radiator sizes and outputs so check if your rads are the correct size for a boiler system.
A rough measurement and type of radiator ( K1,K2 etc) will be close enough.
Then add 50% to the correct size for a boiler system to a heat pump system and watch your wall disappear for when you get a heat pump.
That's aside of an electric element in your hot water cylinder at
12amps (3 kw) to trim your hot water to 55*c and the problems gets bigger. Sadly hmg have not done any presearch or spoken to the pros and the tree huggers don't even get it either I'm afraid.
Pm me if you have any questions ref your rads.

 

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View becky's Profile becky Flag over the moon Yesterday 8.36pm Send a Private Message to becky Holmesdale Online Elite Member Add becky as a friend

Originally posted by dannyboy1978

These will be about 3500 when available next year.
Hardly rocket science to microwave your water!what a great idea and a British invention
[Link]

Bloody silly idea - just tried it with disastrous results

Filled the bath with cold water, sat hubbie in it and plugged in the microwave to heat the water.

Anyway, the funeral is next week.

 


A stairway to Heaven and a Highway to Hell give some indication of expected traffic numbers

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View ASCPFC's Profile ASCPFC Flag Pro-Cathedral/caravan park Yesterday 8.42pm Send a Private Message to ASCPFC Add ASCPFC as a friend

Originally posted by cryrst

The main problem is that the temperatures aren't the same as gas boilers deliver. Typically 82*c flow (out water temp)
and 71*c ( back water temp) return water temperature to the boiler. Hence the present radiator sizes required to heat the space ( room volume). Heat pumps deliver about 65*c flow which will mean up sizing radiators by at least 50%.
Ie a single will be a double and a double will be a treble. That's if they are sized correctly of course. Later for the basic calculations.
The outdoor units are much quieter than the older ones but take up a lot of space and still need power to run. An average of 8kw at the low end. That's 32 amps and many fuse boards are at the limit now so compared to a boiler at max 5 amps there are problems with the 'load' already.
The calculations for radiator sizing which I use are.
Living and dining rooms 5 BTU per cubic foot.
Bedrooms 4 BTU per cubic foot.
Bathrooms and ensuites 3 BTU per cubic foot.
BTU = British thermal units
3412 BTU = 1 kw or 1000 Watts.
Ie a lounge 10ft long x 15ft wide x7ft tall.
10 x 15 x 7 = 1050 x 5 = 5250 BTU or thereabouts
Different calcs for different rooms but same process.
If your heating with a boiler needs to be on longer than 20 minutes to warm your drum your rads are undersized I'm afraid.
I oversized mine by 20 % so 5 minutes and my place is steaming.
Most merchants brochures have radiator sizes and outputs so check if your rads are the correct size for a boiler system.
A rough measurement and type of radiator ( K1,K2 etc) will be close enough.
Then add 50% to the correct size for a boiler system to a heat pump system and watch your wall disappear for when you get a heat pump.
That's aside of an electric element in your hot water cylinder at
12amps (3 kw) to trim your hot water to 55*c and the problems gets bigger. Sadly hmg have not done any presearch or spoken to the pros and the tree huggers don't even get it either I'm afraid.
Pm me if you have any questions ref your rads.

Seconded.

 


I used to put the manager's name in front of Red and Blue but got fed up with changing it. If someone cool becomes our manager then maybe..

Red and Blue Army!

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View BlueJay's Profile BlueJay Flag UK Yesterday 8.50pm Send a Private Message to BlueJay Add BlueJay as a friend

Originally posted by becky

Bloody silly idea - just tried it with disastrous results

Filled the bath with cold water, sat hubbie in it and plugged in the microwave to heat the water.

Anyway, the funeral is next week.

This would certainly cut your heating bill long term - but not recommended .

 

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View Mr Palaceman's Profile Mr Palaceman Flag Yesterday 11.47pm Send a Private Message to Mr Palaceman Add Mr Palaceman as a friend

Originally posted by cryrst

The main problem is that the temperatures aren't the same as gas boilers deliver. Typically 82*c flow (out water temp)
and 71*c ( back water temp) return water temperature to the boiler. Hence the present radiator sizes required to heat the space ( room volume). Heat pumps deliver about 65*c flow which will mean up sizing radiators by at least 50%.
Ie a single will be a double and a double will be a treble. That's if they are sized correctly of course. Later for the basic calculations.
The outdoor units are much quieter than the older ones but take up a lot of space and still need power to run. An average of 8kw at the low end. That's 32 amps and many fuse boards are at the limit now so compared to a boiler at max 5 amps there are problems with the 'load' already.
The calculations for radiator sizing which I use are.
Living and dining rooms 5 BTU per cubic foot.
Bedrooms 4 BTU per cubic foot.
Bathrooms and ensuites 3 BTU per cubic foot.
BTU = British thermal units
3412 BTU = 1 kw or 1000 Watts.
Ie a lounge 10ft long x 15ft wide x7ft tall.
10 x 15 x 7 = 1050 x 5 = 5250 BTU or thereabouts
Different calcs for different rooms but same process.
If your heating with a boiler needs to be on longer than 20 minutes to warm your drum your rads are undersized I'm afraid.
I oversized mine by 20 % so 5 minutes and my place is steaming.
Most merchants brochures have radiator sizes and outputs so check if your rads are the correct size for a boiler system.
A rough measurement and type of radiator ( K1,K2 etc) will be close enough.
Then add 50% to the correct size for a boiler system to a heat pump system and watch your wall disappear for when you get a heat pump.
That's aside of an electric element in your hot water cylinder at
12amps (3 kw) to trim your hot water to 55*c and the problems gets bigger. Sadly hmg have not done any presearch or spoken to the pros and the tree huggers don't even get it either I'm afraid.
Pm me if you have any questions ref your rads.

That is such an excellent post on so many levels...

 


"You can lead a horse to water but a pencil must be lead"

Stan Laurel

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