Dreiha Atmos 4.4 Home Install

[jd1923]

59 minutes ago, Geronimo John said:

That's a deal killer for the vast majority of the USA market for the supply air fan to run continuously.  It just evaporates the moisture entrained in the  coil back into the cabin.  Same as the unmodified Houghton's.  

No, not the same thing The compressor slows down as the fan slows down, doesn't turn on and off. Coils not frozen with frost, air blowing strong over it!

However, we have no empirical evidence, since only 1 Oliver install of the Pioneer model, not much data presented. We need to learn more, but not Like Dometic, Houghton, Truma, Atmos, nor any other standard non-inverter tech model.

[Ronbrink]

9 hours ago, Geronimo John said:

If the fan you are referring to is the supply air fan that is a great set up.  Hot and humid locations:  supply air turns off with the compressor.  Hot and Dry and it can run to retain moisture and still not be humid in the trailer.

GJ

Your understanding is correct, with the Cielo’s Comfy Mode the supply air fan can either be made to turn off in sync with the compressor or to run a short time post compressor shutdown. As previously expressed, “This is HUGE” for the reasons discussed therein and more!

The Cielo can also be calibrated for both temp and humidity readings. Shown here with a slight variance in data points.

Edited July 3 by Ronbrink

[Ronbrink]

On 5/30/2025 at 6:15 AM, Ronbrink said:

Finally I placed it as shown in the pic, whereby the cord runs in and out of the galley cabinet and plugs into said USB port. I used Velcro for the mount, and may eventually hardwire the Cielo through that upper cabinet and tap into the wiring within the access screw port for a cleaner installation.

I have made a couple of note worthy alterations since the above statement. The use of velcro was a great idea, but the Cielo’s wall plate lacked enough tangible surface area for adequate adherence and thus, an additional backing plate was needed. A square of StarBoard Marine HPDE was screwed to the Cielo’s wall plate and 3M Dual Lock used to affix to the fiberglass wall. Care was taken to ensure the Cielo could still be mounted on the supplied base stand, if ever the need. 

The Dual Lock was positioned vertically to facilitate routing of the power cable between and behind the backing plate. 

 

With the Cielo mounted, said cable was plugged in at its bottom and the other end routed into the above galley cabinet. Unlike the previous install the AC outlet, where the microwave plugs in, was utilized with use of a slim fit USB 5V adapter as the power source. The excess cable was then tucked in along the edge of the black cabinet liner. As installed, hardwiring is no longer in consideration. 

 

Edited July 3 by Ronbrink

[Geronimo John]

7 hours ago, Ronbrink said:

Your understanding is correct, with the Cielo’s Comfy Mode the supply air fan can either be made to turn off in sync with the compressor or to run a short time post compressor shutdown. As previously expressed, “This is HUGE” for the reasons discussed therein and more!

The Cielo can also be calibrated for both temp and humidity readings. Shown here with a slight variance in data points.

Finally, an RV A/C MFG who is listening AND understanding the need for a modern control system of RV AC's in a small space that operates in a very wide range of environmental stressors.  

They likely will in a few years be THE design standard for any A/C MFG that wants to remain in this business.  I am thrilled.  

Hopefully the roll-out will produce a reliable track record and many happy campers!

Thanks for being our pioneer on this unit.  

[Geronimo John]

Ron:

Thanks for the PM.  I did not even know what a Cielo was or even remotely how it works.  But for $99 on amazon you have my attention for sure.  

Can you get into a bit more about this Cielo and it's capacities and how it works?  It is a lot more than just a T-stat if it can IR itself into the mother board of the SOB A/C systems  (Like the Houghton) and in effect have the board change how it runs the compressor and supply air fan... That would be off the charts beneficial to the non-modified Houghton owners and some other newer A/C units on the market as well!

GJ

  

Edited July 4 by Geronimo John
typo

[Geronimo John]

8 hours ago, Geronimo John said:

Finally, an RV A/C MFG who is listening AND understanding the need for a modern control system of RV AC'

Actually I understand that the manufacturer of the AC was not making this great leap in progress, but instead it appears that the firm making the Cielo may have.  Definitely need more info/study as to just what this marvel can do for which A/C units.

GJ

[Ronbrink]

9 hours ago, Geronimo John said:

I did not even know what a Cielo was or even remotely how it works.  But for $99 on amazon you have my attention for sure.

Although Cielo offers several models, it is my understanding that the Breez Max is the only one featuring the ‘Comfy Mode’ that has been the subject of my discussions in this thread. A bit more pricey, but well worth the benefits reaped!

[Ronbrink]

17 hours ago, Geronimo John said:

Finally, an RV A/C MFG who is listening AND understanding the need for a modern control system of RV AC's in a small space that operates in a very wide range of environmental stressors.  

They likely will in a few years be THE design standard for any A/C MFG that wants to remain in this business.  I am thrilled.  

Hopefully the roll-out will produce a reliable track record and many happy campers!

Thanks for being our pioneer on this unit.  

 

11 hours ago, Geronimo John said:

Ron:

Thanks for the PM.

In response to GJ’s above comment I sent the following PM, which he thought should be shared:

“In your last comment, it is actually the Cielo Breez Max thermostat that is controlling the Atmos to enable the fan to turn off, not the Atmos itself. Supposedly the Cielo will work with any A/C having an IR remote, that remains to be seen if true with the most common roof top units on Olivers. Sure, the Atmos has some great features IMO, but not that much different from the majority of makes and models for RVs. I’m with you on A/C MFGs improving their design standards, but the Atmos isn’t there yet and thus, credit to the Cielo for advancing our current unit capabilities.”

and his reply:

“This info would be of interest to a bunch of Houghton and other owners that have this weird cycling problem by design of the MFG.  Would you  consider posting as a response.  I have no problem with your doing so.  But others would be interested on how it works and what it costs.

I am totally not familiar with what a Cielo is.  That would be good info to post too!”

Thanks GJ for the positive feedback, especially from someone of your great stature in this forum community!

 

 

Edited July 4 by Ronbrink

[Ronbrink]

On 6/2/2025 at 6:26 AM, Ronbrink said:

I’m sharing my experience in hopes of helping other Oliver owners resolve the inherent humidity issue, regardless of the brand of a/c unit they may have. If found to work with a particular unit, perhaps others can share their experiences. 

To the Moderators: Since I have shifted the emphasis of this post from installation of my Dreiha Atmos 4.4 to specific features of the Cielo Breez Max thermostat to better control humidity, could consideration be given to changing the title of this thread to draw more attention to that matter? If/when any interest in the use of the Cielo for said purpose gains momentum, I’m amiable to starting another tread to further discussion of other’s comments, experiences or findings. Thank you! 

[Geronimo John]

Good suggestion!

GJ

[Ronbrink]

On 6/16/2025 at 8:54 AM, Ronbrink said:

Once the A/C is powered up and set to run at a desired mode of operation and Wi-Fi is discontinued, the A\C will continue to run as set, but changes cannot be made. However, to make changes or when it comes time to turn off the A/C Wi-Fi is once again needed. I know this based on my experience a couple weeks ago, wherein I started the A/C using the phone app while at my house in order to run the Atmos via the inverter while in transit to the COW Barn for storage. Once stowed and ready to leave, I was unable to turn off the Atmos and found it necessary to use my wife’s cell hotspot in order to do so.

To be clear, Wi-Fi is required to initially setup the Cielo to configure use with the Home app on a smartphone. However once desired settings are programmed and Wi-Fi is discontinued, the air conditioner can still be operated manually via the touchscreen on the device to change the temperature, mode (Cool, Heat), fan speed and swing position. AND contrary to the above quoted statement, in the absence of Wi-Fi the Cielo can still be turned off. More on this later.

Edited October 12 by Ronbrink

[BigTexas]

I'm also following this topic closely as I too am anxious to get away from the noise of my Dometic A/C.  And thanks for being the sounding board for all the interest in the Ceilo Max.  

I get that Wi-Fi is needed for initial set up via the phone app.  However in a camping spot, with no Wi-Fi, is Comfy mode still accessible? From reading the website it's only on the phone app and my concern is once Wi-Fi is lost so is Comfy mode.  

 

 

 

[Ronbrink]

23 hours ago, BigTexas said:

I'm also following this topic closely as I too am anxious to get away from the noise of my Dometic A/C.  And thanks for being the sounding board for all the interest in the Ceilo Max.  

I get that Wi-Fi is needed for initial set up via the phone app.  However in a camping spot, with no Wi-Fi, is Comfy mode still accessible? From reading the website it's only on the phone app and my concern is once Wi-Fi is lost so is Comfy mode.  

 

 

 

Good question, I have yet to encounter that situation since acquiring the Starlink Mini. I utilize the $5/mo Standby Mode plan for low-speed data to simply operate the Cielo, as necessary, and some Victron components. I know that once Cielo Comfy Mode is initiated using Wi-Fi to turn on the a/c via the phone app, it will continue to operate in that mode without a Wi-Fi connection. The a/c can then be turned off via the Cielo touchscreen if Wi-Fi is unavailable. I will have to further test for potential limitations in regard to your question. 

[Ronbrink]

On 10/2/2025 at 10:21 AM, BigTexas said:

I get that Wi-Fi is needed for initial set up via the phone app.  However in a camping spot, with no Wi-Fi, is Comfy mode still accessible? From reading the website it's only on the phone app and my concern is once Wi-Fi is lost so is Comfy mode. 

On 10/3/2025 at 10:03 AM, Ronbrink said:

The a/c can then be turned off via the Cielo touchscreen if Wi-Fi is unavailable. I will have to further test for potential limitations in regard to your question. 

Chalk it up to the learning curve, based on recent testing I have found my above statement to only be partially true. Although the power button on the Cielo touchscreen will in fact turn off the a/c, doing so does not cancel a programmed setting entirely. However in the absence of Wi- Fi, the Cielo can be ‘deactivated’ for total shutdown by simply removing its power source. Preliminary findings indicate that once the Cielo is ‘reactivated’ it resorts back to the last setting, which is Comfy Mode in my test scenario. I’m currently working on a hack and hopeful forthcoming tests will provide a favorable result to better address your concern. Standby!

Edited October 12 by Ronbrink

[jd1923]

Camp without Wi-Fi in the year 2025? “Don’t leave home without it!” 🤣

[Ronbrink]

On 10/12/2025 at 7:03 AM, Ronbrink said:

Although the power button on the Cielo touchscreen will in fact turn off the a/c, doing so does not cancel a programmed setting entirely.

To better clarify this statement: In the absence of Wi-Fi, turning off the Cielo via the touchscreen button will only temporarily turn off the a/c; any programmed setting last used (Comfy Mode for instance) will however, turn the a/c back on in accordance with the programmed temperature range setting next cycle. In other words, the Cielo’s off button only serves to temporarily bypass a programmed setting. Without Wi-Fi, the phone app cannot be used in any capacity; disrupting the 12V power source may be a viable alternative with limitations. More on this later, standby! 

Edited October 14 by Ronbrink

[Ronbrink]

In my above July 3rd post I showed the Cielo’s temporary mount utilizing its stock USB Type C cord powered by an adapter at the receptacle outlet in the upper galley cabinet. I have since gained expertise through testing and actual field experiences, and now have even more confidence in the capability of this device. Other than the fact that featured modes can be programmed for both temperature and humidity comfort, preliminary findings indicate that advanced features are accessible in the absence of Wi-Fi, to which I have previously addressed. Learning by trial, being able to conveniently switch supply power off would benefit limited use of said features and thus, an aftermarket USB cord with inline switch was employed. 

 

Proving successful in application, I then focused on a more permanent and aesthetic mount. Yes, holes were drilled and Cielo altered, here’s how I proceeded: 

A file was used to create a furrow for the USB cord to pass through the Cielo’s base.

A 90° adapter was used to connect the switched power cord at the Cielo and then routed through the base components.

A hole was made at the mount point to pass the cord through the wall into a cavity next to the microwave.

A hole was drilled from the upper cabinet into said cavity.

A wire was used to fish a pull string into place.

 

USB cord pulled into upper cabinet, routing to receptacle/adapter and cabinet mat reinstall not shown.

Cielo readied for mounting.

 

Installation complete. 

I think it’s worth mentioning that the black backing plate added to facilitate the use of 3M Dual Lock for wall mounting is not a necessity. As installed, the Cielo can easily be mounted to the wall with supplied screws in conventional manner. I only resorted to the Dual Lock mount initially to enable easy movement when finding the best placement spot for the device, and may eventually remove it for a more streamlined mount and appearance. Regardless, I can now switch the Cielo on for use or off when the a/c’s remote is the preferred method of control. 

At this point in time, I will attempt to only post comments regarding the Dreiha Atmos 4.4 on this thread and further comments pertaining to the Cielo on the Cielo Breez Max thread. 
 

 

Edited Sunday at 02:58 PM by Ronbrink