Search with Wattson

Notifications

Clear all

Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!

Trying to understand my Nibe F1245

Ground Source Heat Pump (GSHPs)

Last Post by Chris12 11 months ago

4 Posts

3 Users

2 Reactions

1,649 Views

RSS

Chris12

(@chris12)

New Member Member

Joined: 1 year ago

Posts: 4

Topic starter 11/11/2025 9:11 am [#2585]

I would like to ask if anyone has any experience using a Nibe F1245-8R or maybe a similar model? We bought a house in Feb 2025 which has one of these installed together with the myUplink app. The previous owner said it had never been serviced (approx 7 years old) so that was the first thing we did and there wasn't much needed doing, what I did want to know was how efficient it is and the service person said you cannot see anything about COP or SCOP in the menu for this model so just go my manufactures spec. So as a newbie to heat pumps from what I can gather the COP and be worked out if you know the energy it was used and the heat it was given out? This would involve some sort of energy monitoring on the cables going in but how do I find out the heat production? The myUplink does have an Energy Log which at present tells me 1726kWh for 1 year's consumption and 7582kWh for 1 year's production, I cannot believe these figures, at present my house is using on average 40kWh a day most of which must be the heat pump, so if anyone could give me a better understanding it would be most appreciated.

Quote

Mars

(@editor)

Illustrious Member Admin

Joined: 6 years ago

Posts: 4958

11/11/2025 11:08 pm

@barry-sharp, is this something you could help with?

🔥 Britain’s Heat Pump Shitshow
How Installing a Heating System Became a National Nervous Breakdown
Free UK shipping.
📗 Heat Pumps Explained
A Jargon-Free Guide for Homeowners
Rewritten and updated for 2027
📘 From Zero to Heat Pump Hero
🛠️ Bodge Buster
New to heat pumps?
Take the Heat Pump Fundamentals course and use INTRO50 at checkout for 50% off.

ReplyQuote

greenlight

(@greenlight)

Active Member Member

Joined: 2 years ago

Posts: 7

27/11/2025 8:45 am

First of all you have one of the best geothermal heat pumps out there. Really reliable.

best thing you can do is put a dim rail kwhr meter on the power supply heat pump. Take your house meter reading on the same day and forever more you’ll know what your heat pumps uses in kwrs and what your home uses.

40krs a day is your entire home I presume and that’s just 1 day in winter. It’s much better to look at data over the year, otherwise you’ll loose your mind.

A simple guide for that nibe is take the total running hours for compressor and multiply by 2kW to get your total kwrs over the 7 years.

im assuming you done have crazy add heat hours.

you should have your run capacitor swapped out by now

👍

ReplyQuote

Chris12

(@chris12)

New Member Member

Joined: 1 year ago

Posts: 4

Topic starter 28/11/2025 9:00 am

@greenlight Many thanks for the information, it's set my mind at ease knowing it's a decent heat pump, have to agree getting data for a complete 12 months will tell me a lot about how it is functioning and the costs.

ReplyQuote