Truma Combi 4e Heating & Hot Water Boiler
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- เผยแพร่เมื่อ 6 ก.พ. 2025
- Mercedes Sprinter Camper Van Conversion.
Introduction to the Truma Combi 4e Heating and Hot Water Boiler.
We also take a brief look at the innovative iNet control system.
I would recommend you watch this short video from Truma.
• The Truma Combi CP Plus
For further information on their full range of heaters and controls please visit www.truma.com/...
Disclaimer -
The products featured in this video have been supplied by Truma UK as a sponsorship of this build series. I'm not being paid to produce this video content.
Thank you for watching #gregvirgoe #vanlife #tinyhome
Love nerding up on Gregs videos! Thank you Greg for your time and reliable info!
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.
kevgermany I had a pretty solid plan from the start to know where I needed to run services during first fix. My years of project management obviously paid dividends there.
Thanks for the appreciation
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 TH-cam, did not cover it as well as you did. Kudos to you for a great and informative video. Cheers from Houston Texas!
wow, I don't know what to say. Thank you for such a fantastic comment.
Greg your attention to detail is absolutely remarkable, your planning is unrivaled. Many thnaks like always for your videos they are phenomenal.
Thank you for such great feedback.
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, 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!
Yes I too have seen lots of silly mistakes and mis information.
I do my best to give the right information that also com plus with any codes and standards so I’m happy that you are getting sound advice. Thanks for the great feedback and best wishes with your build 😃
Brilliant video Greg - I think Truma are lucky you came along as this is an exceptional demonstration of their product. Cheers :-)
That's really nice of you to say so thank you very much
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!
I was searching for some time for the perfect showering and heating solution. This boiler does have a lot going for it.
Pleased it was useful to you.
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.
Thank you, I think the vent in the wet room will be a game changer, we could also dry some washing in there too.
Another great and concise video really enjoying the build and cannot wait to see the end product, thank you Greg much appreciated
Thank you for the continued support Paul.
Your more than welcome and it’s been great to see your subscribers increase so much well deserved
Excellent, clear, educational and inspirational again - thank you Greg for sharing
Great feedback, many thanks Martin 👍🏼
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.
That’s great to know you’ve had 9 years good service.
I’m only planning to use the electric heating when on hook up as 900w or 1.8kW would kill my batteries in no time.
Greg I love your videos, I’m a heating engineer plumber and you explained that very well....
Thank you very much
Excellent video Greg. Up to your usual very high standard. Perfectly explained.
Regards Mark in the UK.
Many thanks, Mark, I had two bites at this one, the first days shooting it took me an hour to get 30seconds of usable film.
Still, there's plenty in the can for the gag reel lol
Can't wait to see you install the heater and get running,all the best
Many thanks for your continued support Barry
Dude, your videos, are brilliant. You are helping me so much. Thank you for taking the time.
With the effort you put into the vlogs can’t wait to see the van finished, good luck with the build .
It's taking a bit longer than anticipated but the effort will be rewarded.
Many thanks for your support
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
Than you very much for such great feedback and i'm pleased you enjoy the videos
Incredible, amazing, fantastic, you've thought of everything! We're all very lucky to have your assistance! Thank you Mr. Virgoe
Thank you for watching and giving me such great feedback
Great Video Greg. The mystery of the boiler is solved. Always wondered what made a Truma so efficient and user-friendly.
Warm air heating has been about since Roman times, and the boiler since the industrial revolution, but now we can control it to fractions of a degree and from anywhere we like. Definitely a very nice bit of equipment.
Yes most defiantly. The ingenuity of the Romans never ceases to amaze me.
Great video as usual. As a newbie, I learn a lot from you!
Excellent introduction. Will be waiting for the installation videos. Thanks a lot for sharing
EARTH IS HOME you don't need to wait, here it is th-cam.com/video/zCjygu0ygKE/w-d-xo.html
EARTH IS HOME and here is the one on the ventilation ducts th-cam.com/video/7_KXMQgla0w/w-d-xo.html
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!
Really appreciate your support, thank you
your presentation are very informative and professional looking
Thank you very much
Just found your channel Greg. I'm glad I did. Excellent presentation. and clear drawings. Great stuff, just subbed.
Welcome aboard thanks for watching 👍🏼😃
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!
Awesome !!! we have the same boiler fitted already and the knowledge of its workings is invaluable ...
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
This heater certainly will deliver bags of heat, we will definitely not be cold in our van that's for sure.
Another fantastically informative video from you, Greg. Thanks for taking the time.
It's a pleasure and glad you liked it.
I'm running out of compliments, I maybe repeating myself: Another great vid, excellent detail! :)
As always, I really appreciated your continued support. Thank you
Great Job Greg ! Already excited to see those installation videos. ATB Marc - Belgium.
Than you Marc, With the lighter evenings and hopefully less rain and snow I will be able to pick up the pace a bit more.
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.
You're most welcome John, I'm pleased it was useful to you.
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!!!!!!!
Hello, I have got all the details. Looking into producing a self build guide. I can now appreciate why motorhomes cost so much. The labour alone is a lot of hours. I’m gonna need a holiday after this project. 😂
Well if you need any free labour I live near McLaren in Woking, Surrey....lol..
You should make a how to build your camper. pop up book Greg!
That's some nice kit Greg. I'll have to save up and bookmark these next few install vids for later!
Yes, this is a game changer for us for sure.
These videos are so good. The effort you go into really shows, thanks
Makes my day to know they are appreciated. Cheers
Been looking for ages for someone who knows what there on a about, top man Great videos
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.
I will give you some exact usage data once we are on the road. Its all relative to how well the van is insulated as to how long the heater is running. Plus if we are cooking the heating will not be required either. We don't plan to spend too much time in the cold as winter camping is not very enjoyable. We will be on the Med by winter where its a bit more temperate.
very cool piece of equipment. well documented Greg : )
Much appreciated, cheers
What a great system! You had me at 'GSM & Bluetooth enabled'! ;)
I'm looking forward to getting this one up and running.
Love your videos, so detailed and explanatory
That really means a lot to me, thank you
A great product! Looking forward to seeing the installation process. Keep on truckin Greg...Now it's really coming together! ;-)
Thank you very much Andy
Cost..
Simply amazing! Such a great help these videos are 👍🏻👍🏻👍🏻👍🏻
amazing video! very impressed.
exerlent again Greg. cant beat being toasty warm :)
We’re going to be wearing shorts and T’s all year round the amount of heat this kicks out. Tropical 🌴 springs to mind. 😂
Bugger... I just bought the Propex Malaga kit but am regretting it now! You've just sold the truma to me
As we’ve found the more you look around and do research the more options you discover. We were originally looking at separate units.
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).
I guess it depends where you plan to travel? What type of van are you looking for?
Greg Virgoe I'm not sure, I can't say right now. At the moment I'm gonna travel a bit more by car. I'll wait until you finished your video series, for even more inspiration for what's possible 🤔 Thank you again for this great channel!
Greg Virgoe Northern of Europe is on top of my list, so a heater may be a good idea 😀
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.
Really appreciate your continued support John, Thank you
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
Thank you, what vehicle are you working on?
Hi greg it's a peugeot boxer lwb still a long way to go yet iv put few clips on my channel cheers
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.
Thanks for that interesting fact. 👍🏼
Awesome video! Thank you. looking forward to the follow up installation videos as well .
Have been running all the power and control cables for this system today. :D
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.
Thanks for the great video. Here from the states and I there are no dealers here.
Hi Anneliese, I found the same with my roof fans and had to get them shipped from the states. Paid more with shipping and taxes but we wanted that particular fan.
I will ask Truma about USA dealerships. Thank you
very smart .. when it works - our Truma combi 4 e does not heat the air enough on gas/mains, AND overheats the water to the point where the red outlet pipe melts from the heat.. how come a temp sensor is not controlling this?
Nice video well done Greg :-)
Thank you very much Malte
Nice,,,Heater and explanation,,, Best Regards
Thank you very much
Love your videos mate!
Thank you, much appreciated.
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
Thanks for designing my entire conversion for me 😅❤️❤️
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 Malcolm, you never know our paths could cross, sounds like you have a definite route planned. We are going to be much more winging it.
For two cylinders you will need a level control device attached to each one, the level of each is displayed separately on the App.
The device is magnetic so steel tank is preferable. Although they do a fixing bracket for non magnetic cylinders.
www.truma.com/uk/en/products/truma-caravan-rv-gas-fittings/truma-levelcontrol.html
Greg Virgoe thanks for that I'll look into it, yep you never know, take care 😀
I foooooking love your videos. THANKS
Thank you very much
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 TH-cam and this is the most informative I've found so far... Just brilliant.
Hello Tony, I do not have the data for dB rating.
Centrifugal fans are usually very quiet these days.
As long as you have adequate airflow and not restricted it should be quiet.
that was fantastic mate thank you for taking the time to share atb gaz
It makes it so worthwhile to receive such high praise. thanks
You are the Man 👍👍
Thank you 🙏🏼
Awsome Greg! ahve you filmed anything about the 240V connection? not sure where I should wire mine...
Hi. Thanks for this video. Would I be able to run a recirculating shower of a Truma 6E? Advice appreciated
Hi. Looks great.
Best wishes.
Love your straight forward yet comprehensive explanation of this fantastic product. When is the install video coming out?
Hello Erik, we are currently filming the installation of the services. The water tanks are done, next is the heater, will be out very soon. Thank you for watching.
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
Hi, do you have any videos of how to fit the the heating elements on these truma combi boilers please. Many thanks Anthony 👍
Also great videos of fitting these combi boilers. Gives us all great information 👍
Hello Anthony, I have a video showing how to install the boiler and you can watch that here th-cam.com/video/zCjygu0ygKE/w-d-xo.html
I don’t have a video about the electric elements as I’ve never needed to change them.
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.
David Farrell if it’s just a small weekend van then go with a simple heater and boil water in a kettle. That’s more in your market.
@@GregVirgoe would need a shower / toilet so some sort of water heater needed. Looked at videos on other heaters and it's not hard to see why truma is so popular even at that price.
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?)
The Truma heats up to 60°c so you have to mix that with same amount of cold to bring it down to shower temp.
Best to use a head like ours with a trigger so not wasting water when lathering 🧼 then you have plenty to rinse. Obviously it’s not like at home but it’s definitely sufficient for us.
Thanks for confirming Greg! Look forward to more of your videos. All the best
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.)
Hello, to heat water instantaneously via a heat exchanger at a flow rate sufficient to have a shower you would need a big heat source. Most combi boilers that do that in domestic properties are rated at 30kW or 100,000Btu
Good luck with your build, let me know how it works out. Cheers
Cheers! Love your work....
Thank you John
Hi Greg. Great videos . Just wondering why you chose the 4e and not the cheaper 2e? .
It will heat the water to full temp in less than half an hour from cold. :D
According to the Truma info sheet the 2E does the same water heating time . I guess it will heat the cabin slower perhaps .
Greg - thanks so much for these brilliant videos - really clear and informative. I'd love to know whether this combi would be practical to work on electric input, as i'm trying to avoid an extra gas tank. Would it be practical/efficient?
It would be fine on electric hook up but would draw too much power from a battery system. 👍🏼😃
@@GregVirgoe thanks v much for speedy reply! - good to know. Guess that would be the same for a Truma Therme too then…
@@sallywilliams6272 the Truma has two 900W electric heaters inside where the Therme has just one 300W element. So to heat the same quantity of water the Therme would take 6x longer. In the end they would have used the same amount of electric.
@@GregVirgoe exactly what I needed to know, and could never have worked out! Thank you, I owe you a beer!
Silly question, but can you take it out the box and plug it in to mains and just use it as a heater?
As not to worried about hot water just want a good heater.
Thanks
I’ll be honest I’m not sure it would work without water in it?
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
At the time the 4E was the smallest option available and given the choice now it would still be better for heating the water quicker. I think 6kw would be far too much
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 :)
Hello Greg,
¿Can you tell which are de pros and cons about de diesel option of truma combi D6?
¿Is a good idea to run a webasto diesel kitchen and a truma combi D6 in order to avoid gas in the van?
Thank you
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.
Is it possible to have hot water with this system without heating the air? I can't imagine wanting the heating on in summer but will obviously still want hot water.
Just wondered what gas safe qualification you need to fit the boiler?
Brilliant as ever:)
Thank you
We have a 5 year old Truma Combi Boiler, and works very well, do they require descaling?
Hi Greg
are you able to have hot water without having the heating on e.g. summer time, if we every get one ;-)
thanks
Yes it can
Great information thanks 🙏
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?
Geoff?? The boiler is dual fuel so when off grid it runs on LPG. We only use the electric elements when on hook up because they consume more power.
@@GregVirgoe sorry Greg! Thanks for your reply.
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
If you were driving through deep water would the air inlets be exposed to that water?
If its very cold and your worried your external water tank might freeze, so you drain the cold water off. Can you still use the heater for warm air?
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 😁
Hi Greg. Do you still use CBE level gauge for your water tanks. Is there a way to connect water level gauges to the iNet?
LOVE THE VIDEOS.
Can you heat the the water without heating the van up if in a hot country or in the summer
Of course! Its two separate functions in one package. Use one or the other or both.
Brilliant thanks so much
JimRYoung you are welcome 🙏🏼
Blood hell just want I will need! I didn't know anything about this heater. 1,400 OUCH! Will look into it further when
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! :)
Yes, we will be doing a detailed video of the installation very soon.
Hi Greg. You showed in the video hiw the heating system connect but You didn't explain how the hot water works.
Thanks
In the cut through section, I showed where the water inlet and outlet are connected.
You would use a normal pressure boost pump such as shurflo or similar and connect from water tank via boiler to your taps etc
I will be covering the water distribution system in another video very soon.
Is there a reason for choosing this over a diesel heater?
Another excellent video Greg.
One question though. It was not obvious whether or not you can get hot water WITHOUT having the van heater on. Is this possible with this unit or does it only heat water when the air heater is operational?
Yes you can just use it to heat the hot water and not have the heating on in the van.
Greg Virgoe how much does this unit cost.?