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AllyFish
@allyfish
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Noble Member
Joined: Oct 31, 2022
Last seen: Nov 30, 2025
Profile Activity
Topics: 23 / Replies: 490
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RE: Why Air Release Valves and Deaerators are Non-Negotiable

We have a manual air release valve on top of the Grant Low Loss Header/volumiser. This is a good location as the velocity through the system is lowest...

2 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Large heat pump options for church building

Hi @josephiah, there's quite a good range of small commercial 3Ph electric heat pump units, or reversible chillers. Example:/span> Many use R290 pro...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy Fixed

@howardp99 it might have saved me £8 compared to the price rise details announced 20th Sept. I didn't updated my spreadsheet with those. Were an all-e...

2 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Octopus Cosy Fixed

I've singed up to the fixed Cosy Octopus tariff. The fixed 12month rate is currently slightly cheaper than the October 2025 Cosy price rise rate. it's...

2 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Preparing for 2nd winter in new build house.

Hi @sbm74 - wow, 650m2 - that's a big pile! But, 60degC max flow temperature - eh, what, why? Building regulations also set the maximum design flow ...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat Pump Damage on install - useable or dealbreaker?

A few years ago all external condensing units and monobloc heat pumps had fairly robust protection grilles fitted to the coil face, which could be rem...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Help me keep the faith with my air source heat pump installation

Roof trusses and dry lined ceilings are a massive sounding board. This is a very common issue with sparks who screw bathroom extract fans direct to ro...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Who’s Caved and Switched the Heating On Already?

Central heating still switched off and will be until October. The Octopus Cosy account has built up a good credit over the summer, but I have over a t...

3 months ago
Forum
Your Home
Reply
RE: Anyone still weathering it out with Agile?

I played 'stick' rather than 'twist' this summer. I would normally have flipped from Cosy to Agile, but to be honest I decided I 'CBA' to check the Ag...

3 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
Topic
Octopus Cosy & Octopus EV + bidirectional smart tariff, together. What, eh?
4 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
Replies: 7
Views: 739
Reply
RE: Why do we need pressurised systems?

A good question @toodles. My old open thermal store and oil boiler chugged away quite happily, if expensively, unpressurised. But the header tank was ...

4 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: 300 Liter Tank - Do I have to heat it all?

Hi @martingale, welcome! You can't really have too big a DHW cylinder, but you can have one too small. If it's well insulated modern unvented cylinder...

4 months ago
Forum
Domestic Hot Water & Cylinders
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