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Mike Patrick
@mike-patrick
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Honorable Member
Joined: Mar 23, 2021
Last seen: Oct 12, 2025
Profile Activity
Topics: 18 / Replies: 163
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RE: To zone or not to zone?

We run on WC but the UFH heating was set up with separate loops to every room. Each has its own thermostat, which provides the upper temperature limit...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump efficiency v Outside Air Temperature

@mattc Here's the same chart with the Excel exponential line added. I could subtract the background 8-10 kWh per day that is used when the ASHP is o...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump efficiency v Outside Air Temperature

@sunandair We leave the ASHP running at the same setting 24/7 (except when switched off in the summer or while away when its left on UFH only). We aim...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump efficiency v Outside Air Temperature

@cathoderay It's just manual collection of data. I read my MAxMin thermometer and the electricity meter once a day and input the numbers into Excel. ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump efficiency v Outside Air Temperature

@sunandair My data collection is very simple - to match my technical knowhow. Each day take one reading of my MaxMin thermometer and the electricity m...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump efficiency v Outside Air Temperature

@marzipan71 My temperature data comes from my own Max Min thermometer. This is carefully placed in the only point in the garden which is in the shade ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Heat pump efficiency v Outside Air Temperature
2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 30
Views: 4878
Reply
RE: Interesting development on defrosting

This ties in with my post on the 5th. Air temperature today 2.4C (colder than on Friday) but humidity only 72% (was 94% on Friday). No frosting of...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Gravel driveway

We put down a gravel driveway 7 years ago on completion of the building contruction/refurbishment of the house. It was just mud and rubble. We used ...

2 years ago
Forum
DIY
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RE: Interesting development on defrosting

My heat pump frosting up this mormning. Outside air temperature 3.4 C, humidity 94%. Prepare for large KWh consumption today. Mike

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is the Grant controller a thermostat?

I love it. A perpetual motion machine. Mike

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Our Grant Aerona R32 13kW ASHP installation

@marvinator80 I get Grant to come and service once a year. You don't need a service plan with them, just book one whenever you want. tbh I don't think...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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