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!
Graham Hendra’s e-book is out on Kindle
For those that are interested, I’ve just seen that Graham Hendra has published a book, 50 things you need to know about heat pumps: A simple guide to renewable heating, but you didn’t know who to ask, which is available as an e-book on Amazon.
🔥 Britain’s Heat Pump Shitshow
How Installing a Heating System Became a National Nervous Breakdown
Free UK shipping.
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.
Thanks. Just purchased it for Kindle.
Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
14 x 500w Monocrystalline solar panels.
2 ESS Smile G3 10.1 batteries.
ESS Smile G3 5kw inverter.
@Morgan, what's the verdict?
🔥 Britain’s Heat Pump Shitshow
How Installing a Heating System Became a National Nervous Breakdown
Free UK shipping.
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.
@editor Not looked at it yet.
Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
14 x 500w Monocrystalline solar panels.
2 ESS Smile G3 10.1 batteries.
ESS Smile G3 5kw inverter.
Purchased the paperback version - I don't own a kindle...
Off grid on the isle of purbeck
2.4kW solar, 15kWh Seplos Mason, Outback power systems 3kW inverter/charger, solid fuel heating with air/air for shoulder months, 10 acres of heathland/woods.
My wife’s house: 1946 3 bed end of terrace in Somerset, ASHP with rads + UFH, triple glazed, retrofit IWI in troublesome rooms, small rear extension.
@hughf, that’s brilliant. Let us know what you think of it when it arrives.
🔥 Britain’s Heat Pump Shitshow
How Installing a Heating System Became a National Nervous Breakdown
Free UK shipping.
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.
Will do….
I’ve got a lot of time for GH and happy to support his efforts to grow this industry. If I can do that by purchasing his book (it’s unlikely I’ll purchase a HP from him 😂) then that’s what I’ll do.
Off grid on the isle of purbeck
2.4kW solar, 15kWh Seplos Mason, Outback power systems 3kW inverter/charger, solid fuel heating with air/air for shoulder months, 10 acres of heathland/woods.
My wife’s house: 1946 3 bed end of terrace in Somerset, ASHP with rads + UFH, triple glazed, retrofit IWI in troublesome rooms, small rear extension.
thanks to everyone who's bought my book, if its successful I will publish part two which is a bit more hi level for engineers. A few people dont want to line Jeff Bezos pockets so you can also buy it here https://graham-hendra.sumupstore.com/
thanks in advance and let me know what you think.
@hughf my days of selling heat pumps are alongway in the past, these days i just sell advice. but thanks for the nice comments i appreciate them.
Heat pump builder, R and D engineer for Haier Europe and head Energy Donkey
Posted by: @grahamhthanks to everyone who's bought my book, if its successful I will publish part two which is a bit more hi level for engineers. A few people dont want to line Jeff Bezos pockets so you can also buy it here https://graham-hendra.sumupstore.com/
thanks in advance and let me know what you think.
@hughf my days of selling heat pumps are alongway in the past, these days i just sell advice. but thanks for the nice comments i appreciate them.
I'd certainly be interested in a part2 - I've got JCs book on the subject and it's also informative.
I've spent hours in your masterpiece of a spreadsheet, sizing my system and playing with rad options, buying your book is the least I can do to say thanks.
Off grid on the isle of purbeck
2.4kW solar, 15kWh Seplos Mason, Outback power systems 3kW inverter/charger, solid fuel heating with air/air for shoulder months, 10 acres of heathland/woods.
My wife’s house: 1946 3 bed end of terrace in Somerset, ASHP with rads + UFH, triple glazed, retrofit IWI in troublesome rooms, small rear extension.
I generally buy kindle books these days, my close up eyesight isn't as good as it used to be, so I find it easier to read. I also appreciate not having to build yet another shelf.
I haven't got a kindle either, I use the free kindle app for the ipad. There's a free kindle app for PC and mac too.
Posted by: @editorFor those that are interested, I’ve just seen that Graham Hendra has published a book, 50 things you need to know about heat pumps: A simple guide to renewable heating, but you didn’t know who to ask, which is available as an e-book on Amazon.
Thanks for the share @Editor - I've just bought the book for Kindle. Looks great!
Also, thanks for the intro to Graham Hendra's work which I've just been consuming. Graham looks like an ideal expert to help me with my own ASHP questions!
76m² Semi-detached House in North East England
Nissan Leaf 110 kW N-Connecta, 2017 Hyundai IONIQ Premium SE PHEV
Podpoint EV charger
Daikin Altherma 3M ASHP (EDLA04E2V3)
Daikin WLAN Adaptor (BRP069A78)
Daikin 150L Hot Water Tank
Solar iBoost
P1P2 and Home Assistant
SolaX X1 Hybrid Series inverter
2 × SolaX Triple Power 5.8 kWh Batteries
2 × EcoFlow Stream Ultra X 3.8 kWh, 1 × EcoFlow Stream Ultra 1.92 kWh, 3 × EcoFlow Stream AC 1.92 kWh, 1 x EcoFlow River 2 256Wh, 2 x Anker Solix C1000X 1056Wh batteries
12 × 365 W solar panels (roof), 1 × 380 W, 1 × 400 W, 1 × 200 W, 2 × 100 W solar panels (garden)
Thanks Mars. i wrote the book for homeowners, it answers all the simple questions like, how big is a heat pump, can it go in the loft etc. the next book wil be for installers. you can also buy it direct from me> https://graham-hendra.sumupstore.com/ here
its kindle and a real book. im very proud of it.
Heat pump builder, R and D engineer for Haier Europe and head Energy Donkey
- 27 Forums
- 2,758 Topics
- 64.9 K Posts
- 1,690 Online
- 7,162 Members
Join Us!
Installer Finder
Degrees of Separation
Latest Posts
-
RE: Where heat loss surveys seem to go against practical reality
@cathoderay I started to record oil usage per month on ...
By ian33a , 1 hour ago
-
RE: Next steps on my ASHP journey: Radiators and Pipework
@bobflux The hydraulic simulator is very interesting...
By Rob of York , 5 hours ago
-
RE: 7kW EV Charger Options Advice
Thanks. Yes, we have patchy 4G. The only option we had ...
By Rusty , 10 hours ago
-
-
RE: Being screwed over by Volkswagen Audi Group
Thanks, @batpred. That integration is the one I have in...
By Majordennisbloodnok , 1 day ago
-
RE: How Accurate Is My DIY Heat Loss Calculation?
@batpred I suspect it will be more this year. I had 9 ...
By AndrewJ , 1 day ago
-
RE: Surface mount or bury primaries for heat pump installation?
@jamespa It's rusting 🙂
By tomasmcguinness , 1 day ago
-
RE: Glass lined Cylinder for private water supply
Thank you, once again, for your replies. Yes...
By ian33a , 1 day ago
-
It’s been out a few days and Amazon has already attache...
By Mars , 1 day ago
-
RE: Missing flow temperature in Heat Geek proposal
Yes, and this is another point I agree. We did find a f...
By Batpred , 1 day ago
-
RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
A very good point. In effect, the DHW pipework is an em...
By cathodeRay , 2 days ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
@tim441 Here are those same three month periods for 202...
By Toodles , 3 days ago
-
RE: Adding additional Solar Panels to a DC coupled battery system
@transparent thank you for your reply above. As alway...
By Old_Scientist , 4 days ago
-
RE: Adventures in heat loss calculations
@rob-of-york — thanks for posting this, all very useful...
By cathodeRay , 6 days ago




