Truma Combi 4e Heating & Hot Water Boiler 

As an IT guy, I learnt to turn ideas into reality by research, design, think, review, think, review, think, review and only then build. Yours is the only van build series that has clearly done that. The design/build it as you go approach may be valid, but leads to most people having a big list of things they wish they'd done differently. And the van becomes an ongoing reconstruction project.

Love nerding up on Gregs videos! Thank you Greg for your time and reliable info!

I am a mechanical services electrician, although we do things more so related to cooling rather than heating in Australia, fantastic video series you are producing a big thumbs up

Greg your attention to detail is absolutely remarkable, your planning is unrivaled. Many thnaks like always for your videos they are phenomenal.

This was the best explanation of the Truma Combi system that I have seen. Even a tour of the Truma factory in Munich Germany, with commentary by Truma engineers, produced by the Fit RV, another RV channel on RU-vid, did not cover it as well as you did. Kudos to you for a great and informative video. Cheers from Houston Texas!

Greg, Thank you very much for putting all this very usefull info out. As a fellow engineer, I really like that you have thought trough everything yourself instead of copying from one video to the next. I see people doing things that makes me rethink all their information, but I also don't want to reinvent everything. I don't worry about that with your videos. I'm going to build next 6 months and then travel around Europe for atleast a year. Your videos are very helpfull. Thanks!

Brilliant video Greg - I think Truma are lucky you came along as this is an exceptional demonstration of their product. Cheers :-)

Can't wait to see you install the heater and get running,all the best

Very nice presentation. I have been using my Truma in our RV since 2008 and still working as good as new. Good quality and great performance. Don’t have the option of electric heating of the water but yet but that is a spare part that I hope to install now that I am extending my roof solar from 100 watts to 1000 watts and a 3000 watt inverter.

I was surprised to see that this kind of heater exists factory made. I have planned to make a same type of heater system with a diesel Eberspächer/webasto, a radiator, a watertank and piping with reservoir and "coolant". Great video, as all the ones before. Really helped with planning my build!

Excellent, clear, educational and inspirational again - thank you Greg for sharing

I'm running out of compliments, I maybe repeating myself: Another great vid, excellent detail! :)

You sir, know your requirement and the correct solution very well! I enjoyed your explanation of the heating system & its functions. Seems like high tech equipment. The ability to have a place to dry clothes is a advantageous. Eagerly waiting for the installation video.

Greg I love your videos, I’m a heating engineer plumber and you explained that very well....

your presentation are very informative and professional looking

Incredible, amazing, fantastic, you've thought of everything! We're all very lucky to have your assistance! Thank you Mr. Virgoe

Another great and concise video really enjoying the build and cannot wait to see the end product, thank you Greg much appreciated

Excellent video Greg. Up to your usual very high standard. Perfectly explained. Regards Mark in the UK.

Excellent introduction. Will be waiting for the installation videos. Thanks a lot for sharing

These videos are so good. The effort you go into really shows, thanks

Awesome !!! we have the same boiler fitted already and the knowledge of its workings is invaluable ...

Hi I’ve only just discovered your Amazingly informative videos. Your very generous to be sharing your thoroughly researched results, that you put across very well. I for one am thankful

Dude, your videos, are brilliant. You are helping me so much. Thank you for taking the time.

Greg, Thank you for what you are doing, this is clearly the best video series on the subject matter available on the internet. I genuinely appreciate the effort you are putting in. I am trying to share it with anyone who is interested in the topic. :) have a great one and keep em coming!

Great video as usual. As a newbie, I learn a lot from you!

With the effort you put into the vlogs can’t wait to see the van finished, good luck with the build .

What a great system! You had me at 'GSM & Bluetooth enabled'! ;)

Great Video Greg. The mystery of the boiler is solved. Always wondered what made a Truma so efficient and user-friendly.

Love your videos, so detailed and explanatory

Been looking for ages for someone who knows what there on a about, top man Great videos

Thank you for explaining how this works, excellent diagram and detail! Its a very efficient system. Outside and inside air are heated, and while air heater is on, it also heats up the water, very smart! The phone app and SIMM card remote control, propane tank accurate gauge is just genius! Truly remarkable German technology! Even named after US President Truman! When I build my van, I don't care how much this costs or how hard to get hold of one, I am getting this system and no other. Its a marvel of science and so beautifully created that it should belong in the Museum of Modern Art (MOMA). Here are some other facts for viewers: 1. The only deal breaker for Americans may be that this runs on 240V so do they make a version for US market at 110V or will this run on a step down adapter from 240V to 110V? 2. I looked up cost on ebay and its not cheap at US $2700 approx. 3. Truma in Germany does not sell the Combi directly to consumers, only dealers. 4. You can look up specs and buy it from this Aussie dealer at AU $2400 + AU$32 shipping. www.mygenerator.com.au/truma-combi-4e-kit-gas-heater-hot-water-system.html 5. The weight of the Truma Combi 4e is 15.8 kg or 35 lbs 6. On the link above, you see all accessories, ductwork diagram, and specs. 7. Yes, you can run the water heater independently of the furnace heater. However, your hot water is also heated for free if you run the furnace. 8. Combi runs on a variety of fuels and power sources: gas, diesel, propane, AC, DC, and using hot engine while driving if you duct it that way. Refer to link above. Thank you Greg, for another great video and adding to the RV/Caravan knowledgebase!

did you know ...the Truma name was founded in 1949 in germany , and was actually named after the u.s president Truman. it was named after him as a mark of respect for his efforts and support in rebuilding and restoring germany after ww2.

Nice one Greg... I hope your keeping all the plans and blueprints as you go, because I would want you to mass produce these motor-homes and I will want to be your first customer!!!!!!!

Another fantastically informative video from you, Greg. Thanks for taking the time.

Another excellent video Greg , I have been pondering what system to put in my sprinter as we are at the same stage of the build in our sprinter. You have most definitely sold me on the trauma system also my wife as she’s always cold and it’s a big concern for her , Thanks for another great video and eagerly awaiting the next instalment

Another great piece of info Greg. I was originally thinking of a heater similar to the night heater in my truck running on diesel, but this system is far superior & combines the hot water function. Once again your info is a great help in my research before I take the plunge.

Great Job Greg ! Already excited to see those installation videos. ATB Marc - Belgium.

exerlent again Greg. cant beat being toasty warm :)

That's some nice kit Greg. I'll have to save up and bookmark these next few install vids for later!

very cool piece of equipment. well documented Greg : )

Thanks for the great video! I'd still go for diesel version if you plan for more than couple of days offgrid in cold weather. Combi 4 eats around 0.2Kg (0.4L) LPG per hour in a van like your Sprinter with 0-20 temperature gradient. This is roughly 10L LPG tank per day even without cooking and hot water. And Webasto dual top can be mounted outside and free additional 70L of living space.

Simply amazing! Such a great help these videos are 👍🏻👍🏻👍🏻👍🏻

Just found your channel Greg. I'm glad I did. Excellent presentation. and clear drawings. Great stuff, just subbed.

amazing video! very impressed.

Another wonderful video from a master content creator! Love the Truma Combi units. However, they're way out of my price range. Therefore, it's a 16K BTU direct-vent propane heater, plus direct-vent instant hot water heater (also propane-fueled) for me. As always, I'm looking forward to your next great video Greg. Keep up the brilliant work.

Awesome video! Thank you. looking forward to the follow up installation videos as well .

A great product! Looking forward to seeing the installation process. Keep on truckin Greg...Now it's really coming together! ;-)

You are the Man 👍👍

Brilliant Greg been looking for a video on these Heaters as I planing to fit one seen plenty of good reviews on them but not any good videos looking forward to seeing your up coming videos . thanks

Bugger... I just bought the Propex Malaga kit but am regretting it now! You've just sold the truma to me

Thank you so much for this video! I didn't even consider putting putting a heater in my van (I don't have the van yet).

Thanks for designing my entire conversion for me 😅❤️❤️

that was fantastic mate thank you for taking the time to share atb gaz

I foooooking love your videos. THANKS

I know you can insulate the area this will be contained in but do you know how many db's radiate. Thank you for the video's Greg, I've searched around on RU-vid and this is the most informative I've found so far... Just brilliant.

Nice video well done Greg :-)

Love your videos mate!

As an update, there are more affordable versions of the Truma around now that run off diesel and/or electric - we bought ours from Bobil Vans and it's fantastic. After-sales is great too.

Cheers! Love your work....

Brilliant as ever:)

Thanks for the great video. Here from the states and I there are no dealers here.

Loving your videos 😎👍🏻

Nice,,,Heater and explanation,,, Best Regards

Love your straight forward yet comprehensive explanation of this fantastic product. When is the install video coming out?

Hi. Looks great. Best wishes.

Brilliant thanks so much

I can't believe it's got 2 dislikes! Excellent video, maybe I'll see you touring Europe in the summer, 4 months and 5800 miles planned! On the level sensor, what happens if you have 2 bottles? Gaslow is steel, why not Alugas, lighter, any disadvantages? I'm looking at re-fillable ones to.

Hi Greg, As everybody says, your videos are by far the best out there for both the way it is presented and the knowledge passed on. My question is why did you choose the 4E over the 2E or 6E, Thanks Greg

I'm sure that's a great heater, but I'd still go with an Eberspächer (Espar) Hydronic unit and a small heat exchanger; that gets you hot water without a tank. You can hook up another heat exchange to the glycol and that one will generate hot air instead of hot water. Rixen in the US has a kit, albeit for 120 volts (for the electric heater that can be used instead of diesel when you have shore power.)

Very Informative as always Greg, Thank you........"VanGuru" ;-)

Great video mate that must be truma top range looking at it the ones we used to fit where a lot smaller

Brilliant

Hi Greg. Great videos . Just wondering why you chose the 4e and not the cheaper 2e? .

Blood hell just want I will need! I didn't know anything about this heater. 1,400 OUCH! Will look into it further when

Great information thanks 🙏

Im presuming you have to have water in the system (tank) and for it to be bled properly before you can turn it on at all

Thanks

Another corker Greg! Have you thought about 'monetising' this series by producing a DVD for aspiring constructors? I'd buy one as a way of thanking you for the excellent content of these videos.

Hi Greg. Great video and great use of Sketchup too. Didn't you say in your video that you were to shoot a video of the Truma being installed? Have you done it yet? Can't find it and definitely need it as I am planning installing mine in the coming weeks or so! :)

Great video as always! When will you do the installation?

Greg that was very comprehensive and well explained - (as usual) - thank you. I did not spot any form of filtration on the circulating air side of the system? Can you enlighten us on what factors you considered in making the choice between LPG and Diesel and what was the killer fact against diesel? I will watch the makers video now (I do like that LPG liquid sensor!). Many thanks.Edit - just watched the linked manufacturers video - I am calming down now I thought I was going to see full on shower action there - ye gods!

Hi Greg, I'm Kevin from Newport South Wales, I am currently completely rebuilding my mercedes 811d van, would love some advise on how to film/ log these works, as a lot of people would be interested, by the way, I love your videos...about the only guy on here with any sense 😁

Awsome Greg! ahve you filmed anything about the 240V connection? not sure where I should wire mine...

Hi Geoff, really appreciate your videos. They're so helpful. In your energy use audit video you say that you will not use the boiler unless you are on a hook up, due to the energy consumption. Does that make the boiler less important to your build or has your experience since being on the road make you just as glad that you included it?

Amazing

Hello Greg. Love the build series by the way. Glad that you got home safely. I have a Truma trumatic C Combi boiler in my sprinter conversion, the one with the grey circular dials. Can these dials be changed to more upto date digital controls like you have on your Combi 4E. Just thought I would ask as you might know what I'm asking. Thank you

I looked at all your video. All excellent. Thank you. Do you have a video on shower installation? Paul from Quebec, Canada

Great video again Greg! We were or maybe are going to go for the Truma 4e but I've seen a few videos and a lot of people claiming you only get 1m 50s of hot water in a shower. Thats ok for me, but if the wife is washing her hair that's not long enough. Are the water heaters window cleaners use not a better option in a camper for continuous hot water (providing you can supply it with a decent feed?)

LOVE THE VIDEOS. Can you heat the the water without heating the van up if in a hot country or in the summer

Hi Greg are you able to have hot water without having the heating on e.g. summer time, if we every get one ;-) thanks

Hi, do you have any videos of how to fit the the heating elements on these truma combi boilers please. Many thanks Anthony 👍

Looking at a weekend / holiday (short term) campervan and doing my sums. The Combi 4e is €1,719.91 which is alot for what I need. Im looking at a separate boiler and heater (propex) and can do that for about €800. I know its space for 2 devices but I could do with that €1000 somewhere else. Love the truma but at over €1700 its not great value for a now and again camper. Would be ideal for full timer.

5 Years on, would you still use this combi system, Gregg? How has it fared over the years?

Greg, I've been binge watching your sprinter build videos. Love them! Do you have any advice for me in the US to purchase the equipment you use such as the water boiler. Or is there a way of getting the equipment shipped, if the company doesn't ship to the US. Thanks for your help! About to start building a ram promaster to be a mobile grooming unit and want to use your videos for the build. Again, love the videos and your attention to detail! :)

Greg, loved watchding your series on panel van conversion to an RV. I see you take great pride in your work. But I also absolutely love your detailed explanation of every thing you have built, installed or fitted, from how it works, how to install it, the handy hints on how to make it easier through to use of template's etc. While I don't know anything about the Truman, and have never used one, why you picked one makes absolute sense. But I have a question. Now the reason I raise this with you is I'm living in Australia, and it gets very hot here. Does this particular model of the Truman, have a way of venting the warm air outside the van during the summer months, when you only want to heat the water? Interested in your thoughts. I plan on doing a van conversion, soon myself downunder, and your videos certainly are at the top of my list of how to videos, when I get started. Wish you all the very best with your travels around Europe.

Another great video Greg! I'm a little late to this party but I just stumbled unto Truma heaters via a friend. Can you recommend anyone in the UK that sells Truma combi heaters that may ship to the US? Thanks

Excellent videos, thank you very much for sharing. Just in the planning stage and you advice is invaluable. Am I missing something - 11 and a half k £? That's more than double the cost of my van :)

Great video can you tell if I can use the heater when the boiler is empty after I’ve drained the water for winter thanks Ray

this stuff is brilliant - i am about half way through and just fitting it all now! Quick one - do you need an expansion vessel for one of these truma that i bought on your very fine recommendation? Thanks for this stuff - invaluable

Hi Greg. You showed in the video hiw the heating system connect but You didn't explain how the hot water works. Thanks