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AllyFish
@allyfish
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Joined: Oct 31, 2022
Last seen: Sep 10, 2025
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Topics: 23 / Replies: 471
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Reply
RE: Grant 13kW Aerona3 - issues getting zones to temp

Clanking is probably thermal expansion & contraction of the copper pipe and/or radiator as it warms up/cools down. I doubt this is air in the syst...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant 10kW versus Samsung 12kW - sizing dilemma with ECO4 installation

My personal opinion: Samsung. Grant unit is a good workhorse, and my calculations of the capacity it supplies are approximate, but I’ve never observed...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Failings of the Heliotherm business model and its competent partners

@heliohelp I think you've been very unlucky there, both in choice of installer, and choice of heat pump OEM. The Heliotherm looks a quality product, e...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Homely launched for Grant Aerona ASHP control

@ggw no, all gone quiet from Grant lately. I was advised I was getting a Grant smart controller to install for trial, but it's not yet arrived.

2 years ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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RE: Rate the quality of your heat pump design and installation

😆 😆 😆 Greg Jackson might like it, but not everyone wants a bright purple waste bin on their patio.

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant 13kW Aerona3 - issues getting zones to temp

Heat rises, a phenomena well known, 'stratification', but strangely not accounted for in multiple storey building heat loss sizing estimates. Actually...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant 10kW versus Samsung 12kW - sizing dilemma with ECO4 installation

EDIT: Ian's covered most of this, he's got quicker fingers! But my thoughts as per his.... I think you've got a great understanding @tobyg of the to...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Defrost Cycles - How Common Are They?

This is the crux of it @derek-m. I've just come off a call with my colleagues in Oslo. Right now it is -13degC and 74% RH, somewhat typical winter w...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant 10kW versus Samsung 12kW - sizing dilemma with ECO4 installation

Yes, at -3degC target LWT should be 45degC, but tends to never get above 40degC, leaving a shortfall of heating duty and requiring supplementary secon...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant 10kW versus Samsung 12kW - sizing dilemma with ECO4 installation

I can't comment on the calculations your installers have prepared, which I presume include for all ECO4 upgrades including internal wall insulation. T...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant 13kW Aerona3 - issues getting zones to temp

Totally agree @mikefl. The way Grant runs the CH and DHW is dumb, with no intelligence between the two. It's basic S plan stuff from 40 years ago. The...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant 13kW Aerona3 - issues getting zones to temp

@crimson this is great news. 😀 Those little temperature probes are very handy, accuracy is probably +/-1degC. They certainly help with understanding ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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