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Alec Morrow
@alec-morrow
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Joined: Jan 7, 2022
Last seen: Sep 4, 2025
Profile Activity
Topics: 8 / Replies: 208
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Reply
RE: Vaillant Arotherm Plus issues - circulation, efficiency and performance

glad you recognise the rot starts with the manufacturers…installers can be crap for a reason..

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant Arotherm Plus issues - circulation, efficiency and performance

In viessmann the curve is a user parameter..vaillant almost the only thing between you making changes and getting a desired out come is the instruct...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant Arotherm Plus issues - circulation, efficiency and performance

It’s the company or perso who specify that should be fine tuning the controller. Ideally that’s the installer too Installing and commissioning is no...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan Room Temperature Mode

@mjr indeed. heating a room is a zero sum game..but that’s well down a steep learning curve for many. the main thing is to always use compensat...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan Room Temperature Mode

they do, or at least they can do. i install multi sensor systems on gas boilers and they are both good and reliable. one client added 120m2 of f...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant Arotherm Plus issues - circulation, efficiency and performance

i’m a heating engineer and 12yrs ago I installed vaillant weather compensation on a vaillant boiler. the boiler misbehaved and Vaillant were called ou...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan Room Temperature Mode

a few things about solar gain.. it’s not really a heating systems performance issue… more building fabric issue MVHR would move the localised gain...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan Room Temperature Mode

@kev-m Raising a heat curve will always use more energy. But if you turn off with on off controls you will need more energy at the start if a p...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan Room Temperature Mode

@derek-m “It is virtually impossible to carry out accurate back to back tests on a home heating system, because no two days are exactly the same.“ ...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan Room Temperature Mode

assuming you have to heated time windows 5-9& 5-11, then the temperature to play with is set back. the aim is to match heat generated to hea...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan Room Temperature Mode

@peterr Mitsubishi almost certainly have mixing valves and controllers for second and third circuits. Ideally each circuit would have a mixing valve t...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: The new heat pump grant – boiler upgrade scheme (BUS)

@saz speak to the manufacturer of your heat pump. (let us know your experience)

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
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