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Brendon Uys

@heacol

Contributor

Noble Member

Joined: Aug 6, 2021
Last seen: Oct 1, 2025

Topics: 3 / Replies: 411

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RE: Are antifreeze valves essential for a glycol free ASHP system?

@abernyte It very much depends on how your system is designed and operated. The poorer the system and SCOP the less effect glycol has on the overall p...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Are antifreeze valves essential for a glycol free ASHP system?

This is correct but you have not calculated the pumping requirements correctly. You have forgotten the increase in viscosity of the glycol mixture. At...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Electricity use for heat pumps - comparing homes and consumption

SCOP 5.3, not even close to the UK record. 😀

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Electricity use for heat pumps - comparing homes and consumption

🤣 🤣 Lets see if we can double that SCOP, I do not think we will be that far off from what I understand of the system 😊

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Are antifreeze valves essential for a glycol free ASHP system?

@editor I am not saying the units will not freeze in some conditions, and I have seen many, however it is the design of the unit it'self that will det...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Are antifreeze valves essential for a glycol free ASHP system?

According to Samsung, you either have to have antifreeze valves or glycol. As glycol will add 20%+ to your heating bill, it is not really an option. I...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Creative trials on Night-time Setbacks to @ faster recovery, improved comfort and even greater energy reductions.

@cathoderay How is your system controlled?

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: How Do Compressors and Frequency Affect Heat Pump Efficiency?

@william1066 It will be great to see the results.

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: How Do Compressors and Frequency Affect Heat Pump Efficiency?

@william1066 This is exactly what I would expect to see, your required flow temperature for under floor is very high, the switch on frequency is very ...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

Topic

How Do Compressors and Frequency Affect Heat Pump Efficiency?

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

Replies: 10

RE: My horrific Samsung heat pump installation and experience

The Samsung pulse width modulation output does not work at flow temperatures below 45 Deg C, why? It is anybody’s guess.