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BLEMMY"Heating with an Air Source Heat Pump" 12:53pm Saturday 4th Jan
joined: 7th Jan 06
last here: 10:32pm Sunday 19th Jan
posts: 165
from: Cardiff

Hi Everyone,

I have never heated my pond prior to this year and finally took off my blinkers last Summer and realised that the fish losses I all too frequently suffered in Spring as we came out of Winter, actually meant that I was not looking after my water or my koi to the best of my ability. Obviously not everyone is financially able to heat their pond but whist I am not a millionaire (unfortunately!!) I thought if I heated the pond and could reduce my stock replenishment cost due to losses as a result, hopefully I could balance the books and do best by my beloved koi.

Faced with a number of heating options and loads of technical information and details of the upfront purchase cost of the various types of heating kit - I found glaringly little information on likely running cost! In the middle of this fog of information I did something for which I will be eternally grateful and decided to ring a gentleman called Garry Joyce at Crystal Enterprises to ask his advice on the use of Air Source Heat Pumps. Garry spared no effort in advising and helping me with advice both pre and post purchase and I purchased and installed as per Garry's guidance a 10.5kw Crystal ASHP.

My pond is 3500 gals, all pipework is insulated inside and outside my filter house, I filter through a Nexus 300 and an Eazypod on the skimmer line. The surface of the pond is covered by polycarbonate on a wooden frame and I am running a side of pond mounted 3 tier Momontaro Bakki Shower through the winter. The bakki is covered by a purpose professionally supplied and made insulating jacket.

I turned the heating on 1st November having fitted the pond cover, bakki jacket and pipework insulation the previous day. I set the desired temperature on the ASHP to 15C and for those members who are interested and perhaps considering an ASHP, my readings are set out below for so far:

NOVEMBER: The heater did not need to activate (due to ambient temperature in South Wales) until 27th. Between 27th and 11am on 30th (3 days) ambient overnight temps (from 6pm to 11am the following day) averaged 2.5C and the ASHP maintained an average pond temperature of 14C (which was my target by setting the ASHP at 15C as it has a 1.5C set fall) and the 3 day cost was £2.81 at a unit kwh cost of £0.17219p.

DECEMBER: Still set at 15C; between 1st - 31st Dec, ambient overnight temp averaged 3.6C (max was 6.8C, lowest was -1.0C) and the ASHP again maintained an average pond temperature of 14C throughout the month. The cost of running the ASHP for the entire month of December was £50.15 again at £0.17219p/kwh used (290.7 kwh used).

JANUARY: Still set at 15C; between 1st - 4th, ambient overnight temp averaged 5.1C (max was 8.2C, lowest was 3.7C) and the ASHP again maintained an average pond temperature of 14C throughout those 4 days. The cost of running the ASHP for these 4 days was £5.32 again at £0.17219p/kwh used (17.2 kwh used over the 4 days).

My fish are looking great, all my filtration is still very active, the fish are eating like piranhas and growing and whilst I know that the coldest days are potentially still to come, to say I'm delighted is an understatement! There is the upfront capital cost to consider but if the next 2 months were to cost me another £200 to heat to 14C, I would consider a total cost of between £250 - £300 a very reasonable investment to save even one fish that may otherwise have become a victim of "aeromonas alley" if the pond had remained unheated..

I hope the above has been of some assistance to other members in their considerations regarding pond heating method and cost. I will post again at the end of January, Feb and March with updated figures for each month for any interested members.

Happy New Year to All,

Paul









3500 Gals; gravity fed Nexus 300; Amalgam UV (fed by dry mounted Vari-flow 20000) and Bakki Shower (3 tray) directly pump fed (20,000 l/hr) from the pond; independent skimmer line which is fed by a dry mounted Vari-flow 10000 pump through a Nexus Eazypod, Airtec 130, Heated - 10.5KW Crystal Enterprises ASHP
Sfox

YKS club member
"RE: Heating with an Air Source Heat Pump" 3:42pm Saturday 4th Jan


joined: 22nd Feb 19
last here: 6:42pm Yesterday
posts: 106
from: Leeds

Thanks Paul, very interesting and very informative.

Steve
BLEMMY"RE: Heating with an Air Source Heat Pump" 4:00pm Saturday 4th Jan
joined: 7th Jan 06
last here: 10:32pm Sunday 19th Jan
posts: 165
from: Cardiff

No problem Steve - glad you found the information of benefit.

Paul


3500 Gals; gravity fed Nexus 300; Amalgam UV (fed by dry mounted Vari-flow 20000) and Bakki Shower (3 tray) directly pump fed (20,000 l/hr) from the pond; independent skimmer line which is fed by a dry mounted Vari-flow 10000 pump through a Nexus Eazypod, Airtec 130, Heated - 10.5KW Crystal Enterprises ASHP
normanbykoi"RE: Heating with an Air Source Heat Pump" 4:07pm Saturday 4th Jan
joined: 20th Dec 08
last here: 7:51pm Thursday 16th Jan
posts: 80
from: MIDDLESBROUGH

Thanks for taking the time to post such an informative article. I was in 2 minds, but you have convinced me to go ahead. Please could you post suppliers, make, model, etc so I can get cracking. Thanks again and please post Jan/Feb results when you get them.
BLEMMY"RE: Heating with an Air Source Heat Pump" 5:38pm Saturday 4th Jan
joined: 7th Jan 06
last here: 10:32pm Sunday 19th Jan
posts: 165
from: Cardiff

Hi Norman,

My ASHP was supplied by Garry Joyce at Crystal Enterprises - the model I decided to go for was the 10.5kw and as you can see from what I've posted, in my opinion it's doing a great job for me!
Garry's direct number is 07912514535.

If you give him a ring I'm sure he will advise you on all the related issues to assist you in your decision as to which way to go.

Cheers

Paul


3500 Gals; gravity fed Nexus 300; Amalgam UV (fed by dry mounted Vari-flow 20000) and Bakki Shower (3 tray) directly pump fed (20,000 l/hr) from the pond; independent skimmer line which is fed by a dry mounted Vari-flow 10000 pump through a Nexus Eazypod, Airtec 130, Heated - 10.5KW Crystal Enterprises ASHP
michaelf

YKS club member
"RE: Heating with an Air Source Heat Pump" 6:46pm Saturday 4th Jan
joined: 16th Jul 06
last here: 8:35am Today
posts: 392
from: Yorkshire

Excellent post. Thank you for the information. I also have a heat pump installed and it works really well. Unfortunately I have not monitored the cost. Not because I don’t want to, but, not sure how I would get the information that you have obtained.

Michael.


10,000 gals. ProfiDrum CombiBio 50, Duratech 19+ Heat Pump, Bakki Shower.
BLEMMY"RE: Heating with an Air Source Heat Pump" 7:00pm Saturday 4th Jan
joined: 7th Jan 06
last here: 10:32pm Sunday 19th Jan
posts: 165
from: Cardiff

Hi Michael,

No problem - glad you found it interesting.

I monitor the overnight ambient air temperatures by using a website which forecasts on a daily basis the temperature every 3 hours through the evening and next morning for my village - http://www.myweather2.com/activity/current-weather.aspx?id=132191

Obviously I then take actual water temperatures at 11 am each morning (could be any time of day as long as you consistently do it at the same time),

When I had the air pump wired in by an electrician mate of mine I paid him an extra £70 to install a sub meter on the supply to the heat pump which records the kwhrs consumption of the heat pump in isolation.

Cheers

Paul


3500 Gals; gravity fed Nexus 300; Amalgam UV (fed by dry mounted Vari-flow 20000) and Bakki Shower (3 tray) directly pump fed (20,000 l/hr) from the pond; independent skimmer line which is fed by a dry mounted Vari-flow 10000 pump through a Nexus Eazypod, Airtec 130, Heated - 10.5KW Crystal Enterprises ASHP
14TB

YKS club member
"RE: Heating with an Air Source Heat Pump" 8:06pm Saturday 4th Jan


joined: 6th Mar 10
last here: 9:02am Today
posts: 6414
from: SOUTH YORKS

Great post Paul,

Think you should be able to save at least another third if you search for the best energy deal,

I pay less than 11p per kwh.

Then I am poor Yorkshire pensioner. Lol


Tony


doscofish

YKS club member
"RE: Heating with an Air Source Heat Pump" 9:17pm Saturday 4th Jan
joined: 25th Oct 15
last here: 12:26pm Today
posts: 62
from: York

Hi Paul. Good read , I too invested in crystal ashp 5 years ago now and like you was impressed by the service and info given. 5 winters on still going strong, best piece of kit I have purchased onsidering the prices competitors are charging. Pete
BLEMMY"RE: Heating with an Air Source Heat Pump" 9:32pm Saturday 4th Jan | message edited once
joined: 7th Jan 06
last here: 10:32pm Sunday 19th Jan
posts: 165
from: Cardiff

Hi Pete,

I couldn't agree more!

Paul


3500 Gals; gravity fed Nexus 300; Amalgam UV (fed by dry mounted Vari-flow 20000) and Bakki Shower (3 tray) directly pump fed (20,000 l/hr) from the pond; independent skimmer line which is fed by a dry mounted Vari-flow 10000 pump through a Nexus Eazypod, Airtec 130, Heated - 10.5KW Crystal Enterprises ASHP
normanbykoi"RE: Heating with an Air Source Heat Pump" 11:27am Sunday 5th Jan
joined: 20th Dec 08
last here: 7:51pm Thursday 16th Jan
posts: 80
from: MIDDLESBROUGH

Thanks again Paul,
I will call him on Monday.
Certainly inspired me to get it done.
Do you just run it October to March?
Also, Tony who is your utility Co please? 11p is cheaper than I am paying, many thanks guys.

John
14TB

YKS club member
"RE: Heating with an Air Source Heat Pump" 7:22pm Sunday 5th Jan


joined: 6th Mar 10
last here: 9:02am Today
posts: 6414
from: SOUTH YORKS

John,
My electricity is currently billed by Symbio, but there may now be cheaper out there I haven't checked for a couple of months. I only check when emailed that I could save £30 per year or more.



Tony


BLEMMY"RE: Heating with an Air Source Heat Pump" 7:27pm Sunday 5th Jan
joined: 7th Jan 06
last here: 10:32pm Sunday 19th Jan
posts: 165
from: Cardiff

Hi John,

No problem.

By heating my pond my intention has from the outset been to maintain a consistent minimum pond water temperature of 14C. The reasons are twofold - the first to take away the stress on my fish of wildly swinging ambient day and night time temperatures in Spring and secondly to prevent pond water temperature falling below 14C average, which according to my reading research, would prevent my koi having to go through the kind of temperature drop and rise over Winter into Spring which traditionally meant they were subjected to the very harmful bacterial phenomena known as aeromonas alley each Spring as ambient and therefore pond water temperatures naturally rose again. Unfortunately "bad" bacteria (e.g. aeromonas being one example) in our ponds become fully active at lower water temperatures than does our koi's immune systems and this natural temperature rise from Winter into Spring potentially exposes our koi to various bacterial infections with the koi having no or extremely limited immunity to fight of any infections they may pick up at that time.

Therefore the answer to your question is yes, the ASHP will be on all year round but due to the thermostat setting, although powered on; the ASHP will only draw power whenever pond water temperatures would naturally (i.e. without heating) fall below my set target temperature - therefore actually drawing heating power between circa mid-November to late March/early April. At other warmer months of the year ambient temperatures will naturally ensure pond temperatures at 14C and above without artificial heating.

Of course there are also other benefits of heating your pond to minimum of say 14C such as filters remaining active and improved growth rates by being able to continue feeding with higher protein content foods.

Yes - Tony's utility tariff is marvellous at 11p - I am on a fixed tariff of 17.129p until September 2022 - but it would be interesting to know who Tony's supplier is for future reference. How much is your current tariff rate John?

Paul


3500 Gals; gravity fed Nexus 300; Amalgam UV (fed by dry mounted Vari-flow 20000) and Bakki Shower (3 tray) directly pump fed (20,000 l/hr) from the pond; independent skimmer line which is fed by a dry mounted Vari-flow 10000 pump through a Nexus Eazypod, Airtec 130, Heated - 10.5KW Crystal Enterprises ASHP
14TB

YKS club member
"RE: Heating with an Air Source Heat Pump" 7:35pm Sunday 5th Jan | message edited once


joined: 6th Mar 10
last here: 9:02am Today
posts: 6414
from: SOUTH YORKS

Paul,
Please check the penalty for you switching suppliers will probably be no more than £40.

I will do a separate post with a few tips for getting the best energy prices later or tomorrow.

Us poor Yorkshire pensioners have to be frugal.

My brother in law in who also lives in Wales does not check his regularly, recently in less than 15 minutes I saved him over £1,000 per year.(will have to do it for him regularly).

Great interesting post by you though don't want to hijack it.


Tony


normanbykoi"RE: Heating with an Air Source Heat Pump" 8:39pm Monday 6th Jan
joined: 20th Dec 08
last here: 7:51pm Thursday 16th Jan
posts: 80
from: MIDDLESBROUGH

Paul/Tony,
Thanks a million for all your help and advice, I've a lot of work to do but sure it'll be worth it.
Cheers
John
andy.clayton2@hotmail.co.uk

YKS club member
"RE: Heating with an Air Source Heat Pump" 7:32pm Thursday 9th Jan


joined: 25th Jun 17
last here: 1:46pm Friday 10th Jan
posts: 73
from: Selby, N.Yorks

Interesting and informative post Paul.

I hope to rebuild my complete setup over the next 12m (not a 12m build plan,just don't have a start date yet!) and will be including a heating system. ASHP was already top of the shortlist, so it's good to get recommendations from you (and others responding) on potential manufacturers and suppliers.

Andy.C.
BLEMMY"RE: Heating with an Air Source Heat Pump" 8:39pm Saturday 11th Jan
joined: 7th Jan 06
last here: 10:32pm Sunday 19th Jan
posts: 165
from: Cardiff

A pleasure Andy - glad the post was of interest and useful.

I will be updating data on a monthly basis going forward until spring.

Cheers

Paul


3500 Gals; gravity fed Nexus 300; Amalgam UV (fed by dry mounted Vari-flow 20000) and Bakki Shower (3 tray) directly pump fed (20,000 l/hr) from the pond; independent skimmer line which is fed by a dry mounted Vari-flow 10000 pump through a Nexus Eazypod, Airtec 130, Heated - 10.5KW Crystal Enterprises ASHP
koiboi"RE: Heating with an Air Source Heat Pump" 4:49pm Tuesday 14th Jan


joined: 25th Oct 07
last here: 3:16pm Wednesday 15th Jan
posts: 3003
from: North Notts

In the good old day when I had a koi pond I installed a 14KW ASHP and 4kW Solar panel system. The savings per year were between £1,000-£1,200 per anum.


6100 gallons, block wall, Fibreglassed, 6'6" deep, 2 X Spindrifter bottom drains to Profi Drum Filter, wide mouthed skimmer, 2 X Double 4 Tier Bakki Showers, 2 X Flow Friend Pumps. 14KW DURA+ ASHP.

500gallon fibreglass QT system based in garage.



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