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