Humidity Spikes - Cielo Testament

[Ronbrink]

I have repeatedly stated how the Cielo Breez Max thermostat is effective in resolving inherent humidity spikes due to the a/c supply fan running continuously in the Oliver. This particular device has a Comfy Mode feature that will turn off said fan in sync with the compressor and thus, significantly lessen moisture from being reintroduced back into the cabin space. I would like to share the results of a test performed yesterday as tangible proof of its effectiveness:  As I rolled up to the COW Barn with my Starlink Mini’s new Standby Mode unpaused (low-speed data plan), the Cielo phone app was used to start the Drieha Atmos 4.4 from my vehicle to begin cooling. I spent about twenty minutes reorganizing inside the van before opening up the CB and entering the Oliver. I should mention we had a temperature drop from the day before, so not real hot (83°), but relative humidity was high (72%) (P1). The Atmos was still cooling in Comfy Mode (preset to turn off when temp falls below 76° and turn on when temp goes above 77°) and the Oliver was 77°/49% (temp/humidity) at entry per the Cielo’s display (P2). A few minutes later the Atmos turned off in total (supply fan and compressor), the display was 75°/45% (P3). As the interior temp increased the Atmos turned back on in total, the display was 77°/51% (P4). It is important to note that the humidity rose 6% during this total off period. The Atmos then turned back off in total, the display was 75°/47% (P5) with a 4% drop in humidity. I let the Atmos continue to cycle in like manner a while longer before switching from Cielo to remote operation (P6) set at 75°. Since the Cielo can still be used to monitor temp/humidity, at time of remote start the display was 75°/52% (P7) and the compressor shutdown soon after (supply fan continued to run). When the compressor came back on, the display was 76°/75% (P8). Yikes, a 23% spike in humidity! The compressor shutdown once again, the display was 75°/53% (P9) and back on again, the display was 76°/74% (P10); a 21% spike. Compressor off at 75°/53% (P11), on at 76°/72% (P12); a 19% spike. As demonstrated, it is evident that the Cielo’s Comfy Mode does in fact lessen those dreaded humidity spikes experienced at times, you be the judge!

 

Edited September 8 by Ronbrink

[CRM]

Nice! Looking forward to installing a Cielo Breez Max along with the Greenland Turbro unit that I'll be installing soon.

Thank you for making us all aware of this thermostat and it's capabilities!

[Treasure Coast Vault]

@Ronbrink I get the same results using the Cielo in my garage with a mini split. Always had humidity spikes in there. Thanks for showing us the Cielo.

[jd1923]

21 hours ago, CRM said:

Nice! Looking forward to installing a Cielo Breez Max along with the Greenland Turbro unit that I'll be installing soon.

Good to know and we're looking forward to your build thread! 😎

[CRM]

6 minutes ago, jd1923 said:

Good to know and we're looking forward to your build thread! 😎

Just need to get my Ollie back first... right now my brother is using it as temporary housing. Loves it so much he's planning on buying one himself. 

[TimD]

Sorry, I see this question has been asked in another thread.  Please disregard!

> Is the Max model required?  E.g., is the 'fan off' function specific to that model? 

Edited September 21 by TimD

[Ronbrink]

9 hours ago, TimD said:

Sorry, I see this question has been asked in another thread.  Please disregard!

> Is the Max model required?  E.g., is the 'fan off' function specific to that model? 

Let me know if you have any further questions unanswered. While running the a/c yesterday in my driveway, I snapped a couple of pics in the afternoon after running for several hours. Houston’s ambient temp at my residence was 97°and relative humidity was 67%. At total shutdown (both supply fan and compressor cycled off) the Cielo showed 77°/42%, moments later both came back on and the ThermoPro showed 75°/38% at next total off cycle. 

[Ronbrink]

‘Earth to Oliver owners’, anyone else out there willing to share their experience testimonials regarding the Cielo? Alleviate humidity spikes for the good of all mankind!

Edited Saturday at 10:16 AM by Ronbrink

[CRM]

4 hours ago, Ronbrink said:

‘Earth to Oliver owners’, anyone else out there willing to share their experience testimonials regarding the Cielo? Alleviate humidity spikes for the good of all mankind!

What's needed is a list of all AC units that are compatible with the Cielo. Might help entice those having humidity issues to give it a try.  We know it works with the Atmos 4.4, and the Turbro/Pioneer units, but has anyone else tried using one with any of the other brands/models? I wonder if Cielo has a compatibility list? 

[Ronbrink]

46 minutes ago, CRM said:

We know it works with the Atmos 4.4, and the Turbro/Pioneer units, but has anyone else tried using one with any of the other brands/models?

Add TOSOT to the list, SDG and some Leisure Travel Van owners routinely install them with the Cielo. 

Edited Saturday at 03:15 PM by Ronbrink

[CRM]

59 minutes ago, Ronbrink said:

Add TOSOT to the list, SDG and some Leisure Travel Van owners routinely install them with the Cielo. 

With all of the humidity issues Houghton owners have had I would think someone would have tried the Cielo workaround with one of those units by now.

Anyone? 

[jd1923]

I was told by one Oliver owner, at the Texas 2024 Rally, that his wife insisted their Dometic Penguin II ran on, with fan ON, running all night (this model in Auto mode will turn the fan on-&-off with the compressor). Reason was, she would wake when it turned back on. Good for her, since we with our windows open had to hear their A/C all night long (and all day for that matter)!

[Ronbrink]

20 minutes ago, CRM said:

With all of the humidity issues Houghton owners have had I would think someone would have tried the Cielo workaround with one of those units by now.

Anyone? 

I have reached out to the entire Oliver Universe, “surely we are not alone”!

Edited Saturday at 04:31 PM by Ronbrink

[Minnesota Oli]

I have a Houghton that I installed and experienced the problem with the humidity. At the time I had not heard about the Cielo workaround but I did read on this forum about installing a relay to control the fan and the need to disconnect the existing temperature sensor and add a new one with a longer lead. I mounted that by the factory installed thermostat. This cured all my problems.

 I know this doesn't answer your question about the Cielo workaround with a Houghton but since I'm part of the Oliver Universe and own a Houghton AC I wanted to reply.

[Ronbrink]

15 hours ago, Minnesota Oli said:

I have a Houghton that I installed and experienced the problem with the humidity. At the time I had not heard about the Cielo workaround but I did read on this forum about installing a relay to control the fan and the need to disconnect the existing temperature sensor and add a new one with a longer lead. I mounted that by the factory installed thermostat. This cured all my problems.

 I know this doesn't answer your question about the Cielo workaround with a Houghton but since I'm part of the Oliver Universe and own a Houghton AC I wanted to reply.

Certainly a viable solution that a few Houghton owners have pursued with great success! However, concerns of voiding the unit’s warranty with wiring modifications to the fan and relay installation was likely a deterrent for many. Thanks for sharing and being “part of the Oliver Universe”, much appreciated!