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rhh2348
@rhh2348
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Joined: Feb 2, 2024
Last seen: May 9, 2025
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Topics: 9 / Replies: 89
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RE: Mixing of pipework/components' with different internal dimensions - theory vs reality/practical approach

@JohnR, I think I've seen something like this for plastic - in essence, each 90deg elbow/T etc creates the equivalent resistance of 0.5m of straight p...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Mixing of pipework/components' with different internal dimensions - theory vs reality/practical approach

Cheers for your post, @JohnR Implying that wherever a larger internal diameter can be applied, the friction loss is greatly reduced and therefore a ...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Mixing of pipework/components' with different internal dimensions - theory vs reality/practical approach

Thanks for the reply, @bontwoody It's no doubt me, but I've tried a handful of times and can't figure out what this means - sorry, could you write i...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Mixing of pipework/components' with different internal dimensions - theory vs reality/practical approach
7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 17
Views: 1051
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RE: The Definitive Guide to Weather Compensation and Curves for Air Source Heat Pumps

Note that the display only shows the flow temps as whole (integer) numbers but the actual temp set may be different by 0.5C

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: The Definitive Guide to Weather Compensation and Curves for Air Source Heat Pumps

In light of some new sub-zero OATs from the past two days, I'd like to amend what I wrote above (but the forum won't now let me edit the post, despite...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: The Definitive Guide to Weather Compensation and Curves for Air Source Heat Pumps

Unless I'm misunderstanding something, my FTC6 allows the user to manually set the flow temperature of one OAT between the high and low OATs. This th...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Moving from two zone to single (open) / how to select a circulation pump - advice please

Thanks @heacol Brendon - helps as well as creating more questions! :-/ I appreciate your time and effort in responding. As I'm sure you know, w...

9 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Moving from two zone to single (open) / how to select a circulation pump - advice please

[quote]Zoning is a last resort, but only if it is designed correctly. If the heating system is not specifically designed to do it, DO NOT do it. It wi...

9 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Moving from two zone to single (open) / how to select a circulation pump - advice please

[quote]I always try to use 1 pump, but more may be needed if 1 is not big enough.[/quote]Paraphrasing, does this mean if the only pumps that could pro...

9 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Moving from two zone to single (open) / how to select a circulation pump - advice please

[quote]Almost impossible. Correct flow rate can only be determined on commissioning, anybody who says otherwise has never commissioned a system correc...

9 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Moving from two zone to single (open) / how to select a circulation pump - advice please

[quote]One that will do the job, they are tools, if you use the wrong tool, it will not work. They all the same these days.[/quote][/quote]From readin...

9 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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