Nibe Fighter 360p ashp costing me loads to run

A question about : Nibe Fighter 360p ashp costing me loads to run

Any one have a nibe fighter system? if so what are your thoughts on it.

I have a nibe 360p in my 3 bedroom Melin homes house and the system is very very expensive to run i have done a lot of reading up on the system and know the system like the back of my hand i have been in contact with nibe, At the moment it is cost me around Ј13.00p a day to run in the winter as it is using 85 units a day. I have now been trying to speak to some one at Melin homes about this system but i can only get though to reception and they just give me some rubbish about we will forward your infomation to our repairs department so i guess they are trying to ignore me.

Even on the energy trust website on air source heat pumps it says the following below

https://www.energysavingtrust.org.uk/...rce-heat-pumps

What fuel will you be replacing? The system will pay for itself much more quickly if it's replacing an electricity or coal heating system. Heat pumps are not recommended for homes on the gas network.

So why the heck did they install a air source pump in the house i live in if we have mains gas in the house?.

Best answers:

• Hi, is the unit itself using 85 units a day, or is that the total meter reading of all your electric per day?
  What part of the UK are you? Temps?
• The units i am quoting are for the nibe system only and i am in south wales in a brand new house with underfloor heating and pleanty of insulation,
  The system uses 25 units of electric a day in autumn/spring mode (in this mode the air pump is running and the compressor and fan are running but the immersion heater is blocked) and it hardly heats the house then the system uses in the correct winter mode for this time of year around 85 units a day in the winter mode(air pump running and the compressor and fan are running and auto-immersion heater enabled)
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• I have put the high usage down to the immersion kicking in but if you disable it the house is freezing.
• My system is the Mitsubishi 8.5 kW Ecodan and is fitted in a four bed detached running UFH, it has been using on average 45 - 55 units per day (Ј4.50-Ј6/day) throughout this cold spell, there is no electric backup element, but I'm running it at a low temperature of 40 degrees, it does the hot water twice a day. house is toasty. I suspect that it is the colder temps pulling in the electric heater to assist, but as you are not warm either the unit is incapable of working at capacity at very low ambient. I agree if there is gas on site...they should have used it, or fitted something that can cope at lower temps.
• silly questions, are you running the UFH all day with night set back on room stat/s?
  Have the UFH manifolds blending valves been set up correctly? / Balanced? Is it Zoned?
• I have put it down to the nibe 360p ashp can not cope well with the temp below 8c,
  There are are few modes i can put the system in to
  Autumn/spring mode (in this mode the air pump is running and the compressor and fan are running but the immersion heater is blocked)
  Winter mode(air pump running and the compressor and fan are running and auto-immersion heater enabled)
  Summer mode ( in this mode the air pump is blocked and the compressor is off and fan & immersion heater is blocked)
  The system has a outdoor sensor and i can also set up auto mode this is the temp the immersion will stop kicking in and the temp the compressor will cut out
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• I keep the living room and kitching stats at the 21c mark and the bedroom ones at 21c the UFH is running 24/7 I was told UFH manifolds blending valves have been set up right but if they are not i would not know if they where wrong,
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• hmm, try dropping the bedroom stats down to 19 C, this is a fine tuning thing I think, the system runs on propane gas as its refrigerant, the unit also relies on return ventilated air from within the house....which you are trying to heat, is there any fan speed adjustment on the return fan, or baffles within each room you could turn down? Also because it is pulling in very cold air from outside can you reduce or minimise the amount, als what temperature are you keeping the tank at?
• There are 3 Air ducts one in the bathroom one in the kitchen one in the shower room also i have been told to keep the trickle vents above the windows that have not got ducts open,
  The fan has got three setting speed 1 speed 2 and normal,
  The Nibe is trying to keep the tank at 55c in winter mode if i switch the system to Autumn/spring mode so the immersion heater is blocked the temp stays at about 25-35c
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• The figures you have given are about right for spring/autum mode as the immersion is then disabled but this mode is no good as the ashp does not perform well when it is below 9c out doors and this is when you need it in winter mode but the problem is then that the 7.2kw immersion kicks in and out throught the day, So for e.g if your immersion kicked in and was on for a hour say that would be 7.2 x what ever tariff your on so if your tarfiff was 13p per unit it would be 7.2 x 13p + 93p per hour plus the cost of the pump running plus the cost of the compressor running plus the cost of the fan running,
  So even come the spring time march / april you will still see your self using a min of 25 units a day
  And another problem you have like me if you leave the nibe 360p in autum/spring mode is that the water is not stored at around 60°C the European Guidelines for control and prevention of travel associated Legionnaires’ Disease recommend that hot water should be stored at 60 °C (140 °F) and distributed such that a temperature of at least 50 °C and preferably 55 °C
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• I've had *some* sucess with this. If you see the other thread on said unit. I've got it down to using 15KWh per day to heat a 2 bed house (79m2 floor space).
  I'm still not happy, however. Nibe are coming tomorrow afternoon. Will update once they have been! Also, these may well be subsised shortly by 7p/KWh when the RHI taffifs come into force. Which I guess will bring them in line will the same KWh cost as mains gas?
• You can also set it to service so it gives you more options,
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• What electric suppliers will offer the new RHI taffifs do you know.
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• Thanks for posting your feedback who arranged for the engineer from Nibe to call yourself or your landlord?
  The guy who fitted the system in our house was from the the house builder and i think he did set the system up right to his knowledge but maybe a engineer from nibe would have more experience with the system than a housing housing developers installer,
  Can you tell me what type of vents you have we have vents in the top of the windows 1 vent in the living room and 2 in the bedrooms these are really small vents in the plastic of the upvc but of course i do not know if they are providing enough air to the system,
  Keep us posted on how much electric you now used now the Nibe engineer has been, Thanks
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