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AllyFish
@allyfish
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Noble Member
Joined: Oct 31, 2022
Last seen: Jun 18, 2025
Profile Activity
Topics: 22 / Replies: 468
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RE: 17kw Grant Aerona heat pump not performing

@soniks thanks for that, the in-built pump in the Grant Aerona 17kW can provide 50l/min at 5m head on the highest speed setting. A Wilo Pico RP25/80 i...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: EBAC re-entering the ASHP market in 2023

@hughf EBAC make a decent UK washing machine, we have one, it's got an impressive 10year warranty. Not the most refined machine on the market but very...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
EBAC re-entering the ASHP market in 2023
3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 8
Views: 2989
Reply
RE: Another 17kw Grant Heat Pump - Advice Needed!

Hi Ash, welcome. Underfloor has a lot of thermal lag, it will take a day or so to get the thermal mass up to temperature. You should be able to get aw...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Vaillant arotherm plus 7KW electric usage

Hi Jon, we're all looking at our smart meters and wincing right now. The outdoor temperature is close on 10degC below seasonal average, so ASHPs are s...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kw Grant Aerona heat pump not performing

@soniks have you details of the second circulation pump fitted? Maybe a photo or something? Have you a flow setter / gauge on the system or any way of...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kw Grant Aerona heat pump not performing

@soniks That's useful stuff. Is the 44deC supply typical? The 12degK between your supply and return water temperatures is revealing. That suggests to ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kw Grant Aerona heat pump not performing

@cathoderay Yes, understood. My home heat loss estimate for the current weather averaging -1degC outdoor air temperature is 6kW or 144kWh per day. Add...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Safety precautions - lithium solar PV storage batteries indoors

@editor thanks Mars. Both the Growatt hybrid charger and inverter are fully metal clad to quite a decent IP level, most high end batteries are. I'll t...

3 years ago
Forum
Energy Storage
Reply
RE: 17kw Grant Aerona heat pump not performing

@soniks a low loss header is a form of buffer, but also hydraulically decouples the primary and secondary sides of the system. They increase the syste...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kw Grant Aerona heat pump not performing

@soniks - the Grant Aerona controller has some basic user level parameters you can check including power consumption in W, flow and return temperature...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kw Grant Aerona heat pump not performing

@cathoderay you're right, and my explanation is a bit confusing. I've seen my Grant ASHP spend a lot to time in defrost recently and it does tend to m...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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