ASHP Installed

[lotus_elan]

Hi
After finding out i needed to replace my oil boiler i decided to replace it with an ASHP and a second hand oil boiler (for back up). so with that in mind we also decided  to update the heaing system to a pressurised system.
All the old radiators were kept except for new oversized towel rails in the bathrooms.
Anyway the system was switched on 22/10/11 and has not been off since, no oil has been used and i am quite happy - so far.
It is a 11.5Kw ASHP plumbed directly into the central heating system in series with the oil boiler (for backup)

[dhaslam]

A good winter for ASHPs so far, particularly when compared to last year.    My weather station went on strike for few weeks this year, it was too wet and windy to  change the batteries  but  something like ten degrees warmer  this winter on average.     
Good idea to have oil as backup, it means you can just switch off in very cold conditions.

[lotus_elan]

Hi
I only monitor inside and outside temp with a weather station that only gives a read out looking at yours it gives a readig for all time.
I am monitoring Kw usage on a daily rate but have now got a device that i can download to the computer to see when and how lone the ASHP is running, so far the daily cost has averaged at less than £2, since turning on. and this is for a heating system that is on 24/7 ?
As i said quite pleased at the moment.

how the system is wired the oil boiler will only power up when the ASHP cannot cope and switched power onto the oil boiler

[lotus_elan]

Hi
I thought i would add this chart to show usage so far this winter

[rondurrans]

Thanks for the graph lotus-elan - what is the internal floor area of your home?

Thanks,
Ron

[peakoil]

Hi Lotus_elan,

Nice Graph on ASHP usage.

Are you using some sort of in-line meter to monitor your heat pump usage - if so I would be interested to know which one you have used as at the moment I am only estimating my usage from my Current Cost terminal?


I have had my 16kw Daikin Altherma HT for just over a year now and I am pleased with it so far. It has certainly worked out cheaper to operate than our old oil boiler. We have disconnected the boiler completely and removed it from the house. I kept it there as a backup last year in case the heat pump could not cope with the weather, but to be honest it did fine and so had it removed - the other benefit was that the unsightly green oil tank was removed from the front of the house!!.

As an aside, and if my memory serves me well - you will not be able to get any RHI payment (if it ever starts) if you still have an oil boiler connected into the system. I will hasten to add that this wasn't my reason for buying a heat pump - my brand new condensing boiler packed in after 4 years and the cost of replacing it (need to get utility room remodelled to accommodate a floor standing unit) etc would of worked out the same as the heat pump - so any RHI payment is a bonus.

Thanks

Nick

[titan]

As an aside, and if my memory serves me well - you will not be able to get any RHI payment (if it ever starts) if you still have an oil boiler connected into the system

I did not think ASHPs were going to be  eligible for the proposed domestic RHI payments but they change the plans so often I wouldn't rule anything out just yet.

[RussJ]

Peakoil:
My understanding is that ASHP are to be eligible for Domestic installations but not for Commercial.
All the literature I've read suggests that this is so but we won't know for sure until the final details are published.
I too am thinking of using a bivalent system with an ASHP for the majority of heating and our old oil boiler as extreme weather backup.
I've not found anything in the RHI regs released to date which prohibits such an arrangement - unless others know better?
I even phoned the Energy Saving Trust and they confirmed such a system would be eligible.

Lotus_Elan:
Could you re-post your graph please - I can't view it.
How do you control your oil boiler/ASHP? I'd be interested to know how you integrate them.
Russ

[JonG]

It's not definitive that ashp will make it into the domestic rhi and hinges on monitoring that is to be carried out on systems in return for the rhpp. Most in the industry are confident that they will be eligible but are less confident about bivalents, gloworm were fighting hard to get them in to justify their product but everything is up in the air at present.

Although the winter is warmer than last year we are still only plus one degree above the thirty year averages so technically a standard winter for the UK.

We use elster meters to measure consumption which are exactly the same as those used on pv systems, and about thirty to forty quid for a single phase unit.

[lotus_elan]

Thanks for the graph lotus-elan - what is the internal floor area of your home?

Thanks,
Ron

Hi
 Approx 1800m2 with 13 radiators

[lotus_elan]

Hi Lotus_elan,

Nice Graph on ASHP usage.

Are you using some sort of in-line meter to monitor your heat pump usage - if so I would be interested to know which one you have used as at the moment I am only estimating my usage from my Current Cost terminal?

Thanks

Nick


hi
at the moment just one of those supplied by the electricity company i have it on the main positive lead into the heat pump, but i am changing to one that monitors and charts by the minute rather than just a daily usage.
im also going to change the room stat to a programable one

[titan]

Thanks for the graph lotus-elan - what is the internal floor area of your home?

Thanks,
Ron

Hi
 Approx 1800m2 with 13 radiators

Typo maybe, seems a bit large for 11.5kW ASHP

[rondurrans]

lotus-elan do you mean 180m2? If not maybe we need to refer to you as Lord lotus-elan of the Manor! 

[lotus_elan]

lotus-elan do you mean 180m2? If not maybe we need to refer to you as Lord lotus-elan of the Manor! 

hi
yes big error did it in feet and messed up LOL lets try 140m2.
put it down to too much liquid festive cheer