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Alec Morrow
@alec-morrow
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Reputable Member
Joined: Jan 7, 2022
Last seen: Sep 4, 2025
Profile Activity
Topics: 8 / Replies: 208
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Reply
RE: Vaillant 10kw ASHP installation. Installer issues

providing you have compensation controls (ie not heat miser, nest, hive, honeywell) from the heat pump manufacturer and providing system volume is wi...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: The Mystery of the Weather Compensation Curve

@cathoderay put simply, waiting for things to get cold means you have to generate excess heat to raise temperature room temp quickly. That’s water in ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: The Mystery of the Weather Compensation Curve

@scrchngwsl This is classic! The heating industry is much bigger than people realise. Many people like comfort and many other nations h...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: The Mystery of the Weather Compensation Curve

it’s called weather compensation as you compensate for the weather, as that’s what causes heat loss! It was mandated in Germany in Boilers because it ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Damage (by installers?) on back of brand new heat pump

some come out if the box like that, so presumably the manufacturers know and don’t deem it important Theres a technical argument that a little bit o...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump delta T too low - 2c

are you in the U.K.! At a design life of 20 yrs each (correctly installed) that would make you 140yrs old! probably the better controls are thos...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump delta T too low - 2c

The trouble is you can’t force an emitter to loose heat, the rate of heat loss from an emitter is determined by physics. A consequence is cycling and ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump delta T too low - 2c

a buffer serves the same function as a header as well as additional ones! If the pipe sizing is wrong then you are stuck with the substandard perfo...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump delta T too low - 2c

you want the return to be relatively. lose to the flow temp though.. this increases radiator out put. Your heat pump relies on a high flow rate...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Underfloor heating designer / engineer needed

This is not correct.. the floor works on a different slope from radiators and needs its own mixer. The good news is this is a standard design an...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Knowing a system will work before we commit to it

Weather compensation control changes the way heating works. you probably don’t need to change them but if the newer ones are bigger you will use margi...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Knowing a system will work before we commit to it

I didn’t realise you are committed to the daikin. Make sure the installers are installing daikins own controller and are not proposing to use on...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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