Truma Combi 4e Self Build Camper Van Installation 

For those that do not know me please let me explain who I am in greater detail. I'm a fully qualified Mechanical Services Design Engineer, I studied Building Services at University for 6 years and have been a Member of the Chartered Institute of Building Services Engineers (CIBSE) and the Engineering Council for many years. On top of that, I have worked in this industry both on a consultancy level and as Director of mechanical services contractors for over 30 years. I fully understand the position that this channel holds when explaining the installation of services like LPG and electrics where they both have the potential to cause fatalities and that you the viewer may be following these instructions. Therefore, I have gone to extraordinary lengths to ensure that the information contained in this video is current and correct and safe to publish to all who wish to view it. The LPG information is taken directly from the European Standard EN 1949:2011+A1 updated Feb 2013 and is the most current standard for "Specification for the installation of LPG systems for habitation purposes in leisure accommodation vehicles and accommodation purposes in other vehicles" The system has also been installed strictly in accordance with the manufacturer's installation instructions. The video has been previewed by Truma before releasing to the public. I sincerely hope that gives you a level of comfort that the information contained is correct within Europe to the very best of my ability at the time of publishing. If you are living in another country outside of the EU then you will need to check your own local standards and I would always advise having these systems tested by a certified professional.

If I'd cut and bent that copper the first time as accurately as you did, Greg, I'd have stopped to have a small party to celebrate!

I wish this video was mandatory training for RV installation and repair techs across the US! It is the most thorough and clear discussion of system installation I have ever seen.

Discovering your videos recently has made my understanding of each elements of the build much clearer. This is incredibly valuable content, thank you for sharing on your channel

Beautiful piece of work and majestically explained. Should receive a bonus from RU-vid for producing this type of content.

Thanks a lot, it’s very clear. You save me a lot of time ! Kiss from France 🇫🇷

I always knew you are more qualified than the average DIY by far but not your actual credentials which are truly impressive. Teaching another however requires a level of empathy, patience and the ability to look at a problem from the 3rd person perspective something few can master. Thanks for what you do Greg.

Hi Greg, Excellent video. Don't take down the "3 things video we never knew about you" It gives us fans some good insight into you. You are a Rock Star! We really enjoyed it. Thanks again for everything you do for us.

The BEST van build videos on RU-vid!!! Thank you so much Greg!!!!!!!!

Just came across your Vlog and found it extremely informative. We only took delivery of our Constellation 3XL in July of 2023 so we're completely new to "van life"! However, both my wife and I like to know how things work and this video provides just what we want. Keep up the good work. Subscribed to your channel and will be watching the new build with interest. Sid and Nicola, Rugby

Hi Greg! I have spent the better part of 2 weeks watching ALL of your sprinter camper van series! Thank you! I plan of using many of your ideas and designs when I start my conversion early next year! You have answered many of my questions and given me so many ideas. I'll send pics when i start work on mine. You're amazing! Thank you again Barbara

Yo Cockney Greg, superb video , just traded in our T6 for a VW Grafter Crafter , so completing planning for full build up here in Scotchland and THANK YOU for your concise , accurate well planned delivery of fitting the heart of any van. RESPECT & THANK YOU . Brian & Anna from Scotchland. 🥰🤩😁😇

First rate, Mr. V. This retired science teacher learns so much from you. Your vlog is my fav on RU-vid. 👍🏻

I was beginning to question your DIY credentials during this video until I heard you say the one phrase that confirmed your skills. *finishes screwing something down* "That's not going anywhere". Seriously though, great videos.

I could watch you install these all day!

What an excellent system Truma is and looks quite straight forward to install. This is another excellent step by step tutorial. Definitely one to consider when installing our bathroom in our next project. Cheers!

And just to add I installed a Truma 6 diesel one I my Renault master ... really great unit and have toured Norway Finland and Sweden for two months... excellent !

Hey Greg another Thorough & Meticulous Job installing the Truma Combi 4E & Plumbing! You have a very Calm & pleasing Disposition & should be a Teacher! Thank you so much for your kind generosity in Sharing in Detail all your Videos. God Bless! Grace in Toronto

Great video as always & credit to the cameraman/woman for steady handwork.

Nice work as always,being a ex gas engineer you done a great job

ive watched lots of your videos I watched this one and i will never install such a device in my van but i still enjoyed watching your video it made me feel more relaxed then i usually am just listening to your install. Then i thought this guy could make awesome AMSR videos for who ever needs them.

Great explanation of what seemed a difficult task. Detailed and simplified.

Another great video. I understand that I will need my gas system testing thoroughly but with your videos I have loads more confidence to get most of the work done myself. You need your own DIY TV show, mate. We’d all be building our own houses.

Greg, you are awesome mate, you break your vids down so most people with basic common sense can follow :-) Liked your vid on the 3 things we never knew about you :-)

Hi great videos really enjoyed watching them I used to be an LPG engineer you should always put some sort of gas compound or gas tape around your threaded joints also don’t allow your hot and cold pipes to touch as it can cause legionnaires disease keep up the good work buddy. 😃

Hi Greg. You've got this video making down now eh? Another flawless, flawless I say, video. Fabulous attention to detail, and seemingly consummately easily. Regards Mark in the UK

Brilliant video Greg. An excellant series. I'm new to this camper van stuff but what I've learned from this series is nothing short of incredible. Well done you.

Christmas Day watching this vid 😊 (and not for the first time either!). A Boiler Maker at work, love the tidy installation ✔️. Always learning and I've just seen that you use pipe liners in the hot water pipe. I'd forgotten to put any of these in any of my joints that i've done so far 😩 and can completely see their purpose. A quick search showed that Magnum MH sell these, ordered 😊, thanks again buddy. Cheers!

You Greg .. " I have to say it .. Your " gentleman reason being .. " you have " give".. with information ".VERY CLEAR". 😘

Really great video, thanks for sharing this information - I've just bought one of these boilers for me van and I'm genuinely terrified of fitting it. Definitely have overwhelm at the moment but this vid makes it much clearer 👍🏻

Excellent as always. Thanks for a really helpful video. Lots of things to connect on one of these!

Another fabulous informative video Greg. When I build my van it will have to have a plaque referencing all of your advice and generously shared knowledge. You a true van life legend. Look forward to meeting you one day.

As with all your videos Greg, superb quality, information and presentation. I can’t believe one of the highlights of my week is looking forward to your next video - keep up the excellent work. You deserve a huge, huge following.

Thanks for the video. I have a Truma Combi 6E in my van conversion and your videos are interesting.

Absolutely Brilliant, you explain it so perfectly. Nothing on RU-vid or anywhere else comes close to this information and It’s Free 😄😄 thank you for sharing Greg, 👍👍👍

Can't believe that i've binge watched the whole playlist since yesterday evening. Even more so since campervans don't interest me much :)) It's your caution, diligence and precision that make your videos fun to watch i guess ;) I wonder what would happen if you started a project on something i'd love to have myself. Keep up the good wörk!

Would love an update/review of the trauma 4e after you have lived with it for a while now..... why you chose that model over the cheaper Truma Ultrastore and other brands and how easy it is to use on a day to day basis for showering etc. Love the video and the channel mate - what would us van addicts do without ya!

Having watched some of your other videos and seeing how carefully you have ensured a vapour barrier everywhere I looked for a video where you had installed a gas appliance to check that you had put a gas drop in. I should never have doubted you Greg. Although I do worry some people might skim watch and miss it.

Smart guy!!! Your videos are so helpful and easy to watch.

Some of the best well shot and explained videos out there. Puts a lot of the rest in back place and and its free to watch. Top top stuff

Brilliant video Greg , top bloke once again you certainly know your stuff always totally interesting and professional 👍🏼

Very very informative video. Just one more thing to add. In the pc board you skipped past the link wire beside the thermostat connections. They are for a window switch that must be fitted if the boiler flue is directly underneath an opening window or within 300 mm of the window. It’s to stop the stuff that kills you entering when it’s open. All so regulations state you must have 10mm clearance between gas pipes and any other services at cross over points. And it’s best to use copper olives in your gas fittings as brass can cut into the pipe over time creating a leak. And it’s all so better to use sweeping bends instead of sharp 90 degree bends as a sharp bend increases pressure drop more when doing your pipe sizing calculations. And you will need a 2000 mm2 vent in your appliance compartment to allow room air to circulate through the boiler. Not combustion air but room temperature air. And minimum flue lentght for a horizontal exit is 600mm. There’s more than one thing I added there I do apologise but mate that is a very very good installation and very informative.

This is perfect timing! We've been in the van a few months now and are starting to think about our options for winter. We plan on heading to Spain/Portugal but figure we'll still get a bit cold so have been researching our options. Thanks for always putting out such helpful content.

You know what mate, your a legend! you explained that perfectly and look forward to seeing the next one...

I learn so much from every one of your videos.

Greg, we love your van build videos! You are absolutely THE best van build series on YT! So much detail and information... Much appreciated! We're just getting started on our Truma 4E install.... Wanted to ask you a quick question on the 12v wiring for the Truma 4E and the Truma CP Plus. Did you wire these up for 12v on separate cable runs, or did you just splice the CP Plus 12v feed into the main 12v feed to the Truma 4E? Thanks so much for sharing your knowledge & experience!

Thanks Greg, absolutely fantastic video and really helpful.

Hi, exellent job, thanks for showing us. Best reagards from Berlin Germany, Steppe

Excellent stuff, well worth the wait, think I might plan one for my van, keep up the great videos, cheers

Great video Greg, im about to start my second van build, I have learnt a lot from my first build and this new one will be something I can live in if I want to, I will be checking out all your vids and will probably be asking you a few questions, my van build is on my RU-vid channel if you fancy a look at my first van. Watching this vid has convinced me to fit a Truma Combi.

Truma now has the 6D which is the only model for diesel fuel and electric which is what I would like to have instead of going with the Espar diesel heater and something else for the hot water where most folks are using gas. Unfortunately, the Truma 6D is for a large RV style motor home so I'll wait until someone comes out with a small diesel interior/hot water heater. I have the small 07 Sprinter 144" so the 6D would be overkill for that.

Greg this has to be my favourite video so far.. Think I've mentioned I have the same boiler and considered it a no go area when renovating my camper a few years ago.. I feel like its not something I couldn't take on myself after watching yr video.. PS- Id still get an expert to check it afterwards tho ;))

What an amazingly well laid out video. Thank you.

Excellent video, super easy. Great editing and very tidy work. Thanks

Thanks for this Video!

thanks so much for this dude, really helpful!

HI Greg! I watch your videos in 2023, great job, wow! I have one question - how many hot air outlets do you have? do you have it shown in a video somewhere?

Really liking your van posts Greg, have plans to do my own build in the near future. Your videos have given me some great ideas and inspiration. Keep up the good work. :-)

great video again Greg. nice little unit the truma, very versitile.

I am running out of words to describe PERFECTION!! 🤔🤔🤔😱.......👍🏻👍🏻👍🏻

This video was so satisfying. I need more GREG

Thank you Greg. Fantastic video keep them coming. 👍 🚐 😎

very neat and very professional, thank you, i will follow your wisdom once i move to the UK.

Hi Greg, fantastic informative video from you as they always are. May I request that you attenuate the music slightly as I have to have the volume right up to hear what you are saying, so when watching the video late at night or early in the morning the music wakes my wife when it comes on!

such details. so much fun to watch and LEARN.. ty so much

Great video Sir, and also a pleasure to watch. I, myself having worked in the building services game for 30yrs or so ,as a contractor, always value good workmanship, with simple explanations followed by a clear execution, and you have nailed both as always. On a practical note, would you lay the flue to a slight fall to atmosphere, so to expel any condensate formation that may build up in the flue pipe/s, this seems good practice on a domestic sized job. PS you are fueling my desire to `camper van' as I work in all areas of the country, IR35 implementations have some what pulled a shadow over the hotels bill affordability - so this camper van life has a cheap hotel stamp written all over it!!!!!

Hi Greg, first of all can I congratulate you on the best self build series on RU-vid. Clear and comprehensive. I have recently bought a 14 plate VW Crafter, which is, to all intents and purposes a Sprinter. I am hoping to use your videos as a template! I am in the very early stages, about to thread the wiring, I have a couple of questions! 1. In your wiring video, you thread a cable vertically through the corrugated trunking. The equivalent route in my van (which externally looks the same as yours) has an obstruction part way down and only allows the passage of string or cable! Did you have to open this route up at all? 2. I am keen to use the Truma Combi Boiler, but will have to purchase it later. Is the control cable a standard Cat5 network cable? I have plenty of that and could route it now in preparation! Hope these aren't too trivial a question! Cheers Dan

Brilliant thanks Greg .... enjoy your travels

I love your T shirt ... "IT WILL ONLY TAKE HALF AN HOUR" ... L.O.L I have been a D.I.Y person for years, and it can take me that long to find the correct screw driver some times :) Jokes apart ... Thank you for these videos, really useful.

A master class 👏🏻

Another great video Greg. Many thanks

Cracking video as ever. Like a good detailed vid from you. Its all coming together 😁

Just replayed your vid just gone to the back of the class for not listening 12mm Steve

Being an American, I found a US supplier! WooHoo!

Excellent clear and concise video Greg. I am considering swapping out a Whale unit for a Truma but ideally would prefer an underfloor placement for a Diesel -Electric unit that does both Water and Space heating. My understanding is that all Truma units are designed for interior fit out only but I'm only starting my search. Greg, are you able to confirm Truma units are all interior only? I've looked on the Truma FAQ's but cant find confirmation. Thanks for your great channel. 👏

Another great video Greg

Hi Greg, I admire how you have followed the Build Standards like a good German Officer. 'Ridgid fittings must only be used on the gas installation in a moving vehicle'. Doesn't that smell just a little bit odorous to you??? You may get your gas certification but, let's face it, I hope you install a good detector/alarm and leaked gas outlet.

Excellent video as always Greg. One thought. I've heard you say that most of your travels should be in warm climates, with this in mind, did you ever give any thought to installing the Truma air con system? If you had considered it and rejected the idea what put you off? Space, power requirements, cost or a combination? Thanks again, best van conversation resource on the Internet.

Great video so clear. And so informative

Another great video as always thank you 👍👍👍👍

Hi Greg. Thanks so much for the video on the Truma 4e combi. I just wondered if you let me know what size and make of LPG tank you would recommend for this type of heater. Thank you! Jo

Excellent information Greg, very neat also!

Another great video, keep them coming.

Great video series with all the gory details. Thanks! :-)

Best on the Tube

Excellent and very informative video as per usual keep it up

Nice well explained video as always Greg.

10/10 as always Greg 👍

Best video ever👍

Do you have to have 4 internal vents for the ducts or could you link them somehow and only have one internal vent to heat the van?

Hi greg love your videos very useful!!! I have couple of questions: i guess for truma combi you used 1.5 mm cable for 12v, so my question is why for the fridge you using 6 mm cable when is consuming less then the boiler. Please if you could answer as we just started our conversion and we are following your video to do it! Anyway thanks a lot for sharing your conversion and your work is just great!!!!

Hi Greg. Another fantastic video thank you! Very clear & precise, I really appreciate the time you take to make these videos in order to help other people! I have a few questions Greg; How do you find the Truma for heating & hot water (independently of each other & used together) now that you've been using it for some time? Do you find that the manual times for heat up by Truma are accurate? How long does it take for just the heating to heat up? How long for just hot water? How long for both together? If I had a shower & then my partner wanted a shower straightaway afterwards, how long would he have to wait for recovery time? Hope you can answer these questions for me as want to go ahead & purchase a Truma but waiting on your reply until I do, just to be on safe side! Thanks again Greg. Stay Safe in these strange times!! Tracey.

Have you checked how hot the gas pipe gets when it’s in use? With mine, I’ve a small leak (I think from the hot water elbow) and with it set to hot on electric 2 the gas pipe gets bloody hot! On my van a few inches after where the gas pipe goes in it has an outer plastic sheath on the gas pipe, but noted yours didn’t and is close to the van lino. Just a heads up as to quite how hot it gets!

great vid. thats probably one of you most watched i bet

Wow 😮 that was something,exelent video

Thank you for your cracking videos ❤ It makes me feel like I can achieve it. I have a question that I've just thought about and I'd appreciate your advice on, do I need to connect my shurflo water pump in line to the boiler? If that makes sense 😅

Brilliant video's, clearly explained. Thank you.

Is there a cheaper brand than this that does the same job?

Can you please send a link to the electrical side of the install of the Truma 4e as discussed in you video?

How noisy is the unit ? Can it run on diesel ? I’d like a no gas solution for my van? Thanks