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Prunus
@prunus
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Joined: Apr 6, 2021
Last seen: Oct 16, 2026
Profile Activity
Topics: 6 / Replies: 77
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Reply
RE: Whilst Regs allow on-off simple thermostats (Nest, Hive, Heatmiser, Honeywell, etc) Installers should never be responsible for failing heat pumps!

It's completely nuts. This is the compressor speed of my Grant (aka Chofu) ASHP, using the Honeywell Lyric on/off controller the installer supplied. ...

5 years ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Published noise vs measured noise

To add, another thing is the sensitivity of the occupants. I specifically chose a larger double-fan heat pump because it was quieter (60dB) than a sm...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Review your air source heat pump

Hi Mars, I can't help but feel conflicted about this. I'd say there are several factors in play for a heat pump install. Site: the type of hous...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Antifreeze protection

An alternative approach to using glycol is to use anti-freeze valves. Basically you put these at the lowest point of the ASHP outdoor circuit, and th...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Chilled Water AC System

You will probably need to talk to distributors, since they aren't typically a part stocked in everyone plumbing warehouse. Orion Air Sales have the F...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona 3 16kW ASHP in 100 year old cottage

The way Grant do it, they have a traditional heating thermostat (like a boiler) to provide 'heat please' and 'hot water please' inputs to the heat pum...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: What criteria would you rate an energy provider on?

At the end of the day it's all about tariffs. Might not be the cheapest, but a tariff to suit your use case - eg cheap EV charging overnight. Obviou...

5 years ago
Forum
Electricity, Tariffs, Monitoring, Electrics & Providers
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RE: Anyone want to share costs on batteries?

Sofar has bigger units than the 3kW version, or you can double up. But 16A per phase (ie 3kW single phase) is the limit of the UK G98 certification, b...

5 years ago
Forum
Energy Storage
Reply
RE: Anyone want to share costs on batteries?

The folks over at diysolarforum.com are getting quotes for $1300-1800 (delivered, variously to US, EU, etc) for ~10kWh of LiFePO4 cells from China, de...

5 years ago
Forum
Energy Storage
Reply
RE: Smart TRV’s in Cabinets?

I'm not aware of smart TRVs with external temp sensors, but one possibly useful thing is that UFH setups typically have the valve and the temperature ...

5 years ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Chilled Water AC System

I think what you're talking about are Fan Coil Units or FCUs. They're basically a pipe with metal fins to transfer the heat, with a fan to blow air t...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: What is this and what does it do?

I'm not sure that difference is 'set', but it's essentially the properties of your heat emitters (radiators, UFH etc) and water cylinder. For exampl...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
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