Sirocco 2 Fan install

**ScottyGS** · May 16

Hey Everyone,

Just wanted to share some info on the Sirocco Fan install that I did recently to #145.

We've had posts on this type of install before... John Davies I believe was the most robust with a metal backplate between the ceiling over the bunk and the fan base itself.

This install is a bit simpler. I used a plastic sheet to act as an interior backing plate AND a drilling template. Lots of measuring and fretting were involved before actually drilling the holes. The result was better than expected. The mounting is rock solid! I used 6-32 x 2 inch machine screws with washers to mount the interior plate that the fan installs onto. The supplied backing tape is very sticky so make sure the plate is exactly where you want it before peeling the backing off that stuff. When you drill... there is an air gap above the ceiling so be prepared for that (I wasn't for the first hole) and make sure the drill is as perfectly straight as you can hold it.

One thing worth mentioning is.... You will be forced to place the fan so that the stowed position is tilted FORWARD. If you try to mount it so there is enough room that the fan can fold toward the rear You will most likely have some plate mounting holes that hit the aluminum L bracket that holds the side wall of the attic. Again... lots of measuring and noodling about the placement.

For power I just tapped into the cigarette lighter plug in the wall, very simple.

The fan moves a lot of air even on low power. I believe it will be very nice for those hotter boondocking nights that require a LOT of fan power. I have purchased a second fan and will mount it to a small cutting board with a Cig lighter plug wired on so we can move it around as needed.

I thought some folks might be in the same boat as I was in wanting to mount this fan above the bunk but worried that it might not be sturdy enough. Seems very solid. Will let you know if the next series of bumpy roads changes that.

Happy Camping,

Scotty

**jd1923** · May 16

23 minutes ago, ScottyGS said:

Just wanted to share some info on the Sirocco Fan install that I did recently to #145...

Scotty, some Amazon reviews state the fan is practically silent. What is your opinion on this? Is this the same model and manufacturer as yours? Thanks!

https://www.amazon.com/SEEKR-Auto-Sensing-Omnidirectional-Low-Power-Installation/dp/B01LDY4TE4

**Steve Morris** · May 16

Not Scotty, but in our experience with two fans, each mounted either side of the television, it is indeed whisper quiet. Even with both on the highest speed, I'd say it isn't as loud as the Truma A/C on low. And the fan that you linked is the one we ordered. Ours were $88 in December 2022. We had them even before taking delivery of Curiosity!

We pivot one fan toward the other, with the second posted forward, in an effort to help with circulation. The advantage of having two is that either of us can have the fan blowing directly on us in the twin beds as desired.

Deb sleeps hot, so frequently has hers on medium blowing directly on her, while I might not have mine on at all. Much better than her having the ceiling fan on medium at home while I have the blanket up to my chin! 🤣

@ScottyGS Do you travel with yours stowed in the up position? I had considered doing that, but was concerned that the bouncing might wear the catches on the locking mechanism. So we make sure ours are locked in the down position before travelling.

Edited May 16 by Steve Morris

**jd1923** · May 16

23 minutes ago, Steve Morris said:

Deb sleeps hot, so frequently has hers on medium blowing directly on her, while I might not have mine on at all.

That would be my Chris too! I’m not into fans, so for me just one fan is needed on her side. Thanks

**ScottyGS** · May 16

JD.. Yes that is the fan I installed. No, it's not whisper quiet... but it is pretty quiet when set on low. We like the maxxfan a lot when sleeping... provides just the right amount of white noise to cover any other sounds. The Sirocco is about the same as the maxxfan but it's a lot closer. Still not annoying and should not interfere with sleeping. I posted a video of the fan on the facebook page... you can look for it there. I cycled through the 3 speeds so you can hear how loud each is.

Steve, Have not travelled with it at all but plan on leaving it in the down position. I think it would stress the fan especially on bumpy roads. Will probably leave it in the down position all the time.

Thanks,

Scotty

**ScubaRx** · May 16

5 hours ago, Steve Morris said:

Do you travel with yours stowed in the up position? I had considered doing that, but was concerned that the bouncing might wear the catches on the locking mechanism. So we make sure ours are locked in the down position before travelling.

I have our two mounted on each side of the television. I decided that locking them at all while underway was not the best idea. We just let them swing free.

Edited May 16 by ScubaRx

**Steve Morris** · May 16

1 hour ago, ScubaRx said:

We just let them swing free.

With my juvenile mindset, it was really difficult not to say something inappropriate here. But I refrained. 😁

**topgun2** · May 16

9 minutes ago, Steve Morris said:

With my juvenile mindset, it was really difficult not to say something inappropriate here. But I refrained.

I'm guessing that there are a bunch of kids in the pool here.😇

Bill

**Ronbrink** · May 17

Here’s my adaptation in mounting the two Sirocco ll fans back in 2020 shortly after our OLEll purchase. By chance, my setup has worked really well, thus far! Rather than a permanent mount and hardwiring, I used Velcro for attachment and installed ports in the fan base for a detachable power cable. The fans and cables are stowed in the attic when not in use and can be deployed, as needed. The two primary locations are above each bed and an alternate in the galley to direct air flow toward the dinette. I like that the fans are multi-directional both forward and downward facing. The white Velcro is not very noticeable at the three attachment points and excess cable is simply wrapped around the base for a clean appearance.

**mossemi** · May 17

A different Sirocco fan mounting option.

Mossey

**Jason Foster** · May 18

On 5/16/2025 at 12:27 PM, jd1923 said:

That would be my Chris too! I’m not into fans, so for me just one fan is needed on her side. Thanks

Tina, my wife, sleeps hot but I am practically a furnace. She can’t sleep next to me even in winter because of this. I have two fans running on me at all times. Even now I am sitting in my recliner with the AC vent blowing on me. I had it installed this way on purpose.

I might actually consider buying a couple of these fans but I don’t want to put screws in my Oliver. Perhaps some gorilla glue would work?

**jd1923** · May 18

1 hour ago, Jason Foster said:

I might actually consider buying a couple of these fans but I don’t want to put screws in my Oliver. Perhaps some gorilla glue would work?

Amazon delivered ours today, but I’m waiting ‘til Monday or after since I’m getting a fresh batch of 3M 4950 VHB tape (stored tape and glue dries out, goes bad quickly out here).

I strive for minimum drilling, one 1/8” hole max for the thin wires. I’ll post my install in a few days.

**Jason Foster** · May 18

6 hours ago, jd1923 said:

Amazon delivered ours today, but I’m waiting ‘til Monday or after since I’m getting a fresh batch of 3M 4950 VHB tape (stored tape and glue dries out, goes bad quickly out here).

I strive for minimum drilling, one 1/8” hole max for the thin wires. I’ll post my install in a few days.

If I had actually paid attention to @Ronbrinkpost above with the velcro, I wouldn’t have made to obtuse comment about wondering how to attach. I’m curious if it will actually stay and not fall on my wife’s head in the middle of the night.

**Ronbrink** · May 18

48 minutes ago, Jason Foster said:

If I had actually paid attention to @Ronbrinkpost above with the velcro, I wouldn’t have made to obtuse comment about wondering how to attach. I’m curious if it will actually stay and not fall on my wife’s head in the middle of the night.

Never had one of these fans fall in 5 years of use, nor any issues with the Velcro adherence on the wall or fan base. Use quality Velcro on a clean surface for best results. I actually have to give them a bit of tug when removing, so can’t imagine one just loosing grip and falling. That said, if left up when bouncing down the road then Newton’s Law likely will factor in!

**Jason Foster** · May 18

49 minutes ago, Ronbrink said:

Never had one of these fans fall in 5 years of use, nor any issues with the Velcro adherence on the wall or fan base. Use quality Velcro on a clean surface for best results. I actually have to give them a bit of tug when removing, so can’t imagine one just loosing grip and falling. That said, if left up when bouncing down the road then Newton’s Law likely will factor in!

You can’t beat 5 years of data. Thanks.

**jd1923** · May 18

I figure if Ron's Velcro works then 3M VHB will work equally well for a permanent mount. I'd want it hardwired and not interested in moving it from Chris' bed area. Mossey's mount is very good looking but then you'd always need to store it somewhere.

We usually have one of these on our nightstand. I use it for the stated purpose of a laptop desk and Chris uses it when we watch TV as a headboard.
https://www.amazon.com/Sofia-Sam-Purpose-Sparkle-Supports/dp/B015QLBNQ2/

**Jason Foster** · May 19

On 5/18/2025 at 11:33 AM, jd1923 said:

I figure if Ron's Velcro works then 3M VHB will work equally well for a permanent mount.

I’m certainly not a velcro expert, so I will probably go with what everyone recommends. I may also hardwire it in if I don’t have to drill a big hole.

**jd1923** · May 20

Thank you @ScottyGS for the reminder re this Sirocco II fan!

OTT had drilled a HUGE hole in the back corner for TV cabling, so I was able to install ours without drilling any holes. If this hole was not already there, I would have drilled a 9/64" hole for the wiring, centered to the mount so no wires would be visible. Instead you can see about 3" of wiring coming out the the side wire channel of the fan. They provide 2 screws and nuts to secure the mounting plate to the fan. Wire first, then screw the plate, then add the tape. Wired it to the 12VDC present above and the whole job took an hour.

It's rather hard to square up the fan in this location, since the back wall is curve. To line it up, I laid on the bed looking up, let one edge slightly touch and when sure of its alignment pushed up. Then push up on all sides, rock it, twist it so the tape will bond. The down side of VHB tape is if you do not get it straight on placement it will forever be installed on an off angle. Be patient.

3M VHB 4950 is a great product. I've used it to install rooftop solar panels on our old Class-C, on the new antenna I installed on the Oliver and in dozens of installations. Some do not trust tape but it is amazingly strong. In fact I will be very sorry if I ever have to remove it. Likely for this fan, I could have used half as much tape. I ran one length of tape right down the middle and then two more and used a razor blade to trim it to a fitting oval (pic1). BTW, do not purchase the tape I linked above which is 3/4" and a mil thinner (another Amazon return!), pay more and get this product instead. https://www.amazon.com/dp/B007Y7GIKI/

If you prefer to use screws, do it correctly as Scotty demonstrated, machine screws with nuts and make a backing plate. I used that kind of installation for our TV mount. Never use wood screws into fiberglass as OTT does in way too many installations.

I wanted the fan far back and pretty close to our TV to make the most room possible for our PJ baskets (pic2). Also, in this location the rear window can be cracked on that side to bring in cool fresh air. Chris will be VERY happy on our next trip. We're leaving next week to MN, ND, SD, WY, and the Western Slope of CO!

**Jason Foster** · May 21

20 hours ago, jd1923 said:

Thank you @ScottyGS for the reminder re this Sirocco II fan!

OTT had drilled a HUGE hole in the back corner for TV cabling, so I was able to install ours without drilling any holes. If this hole was not already there, I would have drilled a 9/64" hole for the wiring, centered to the mount so no wires would be visible. Instead you can see about 3" of wiring coming out the the side wire channel of the fan. They provide 2 screws and nuts to secure the mounting plate to the fan. Wire first, then screw the plate, then add the tape. Wired it to the 12VDC present above and the whole job took an hour.

It's rather hard to square up the fan in this location, since the back wall is curve. To line it up, I laid on the bed looking up, let one edge slightly touch and when sure of its alignment pushed up. Then push up on all sides, rock it, twist it so the tape will bond. The down side of VHB tape is if you do not get it straight on placement it will forever be installed on an off angle. Be patient.

3M VHB 4950 is a great product. I've used it to install rooftop solar panels on our old Class-C, on the new antenna I installed on the Oliver and in dozens of installations. Some do not trust tape but it is amazingly strong. In fact I will be very sorry if I ever have to remove it. Likely for this fan, I could have used half as much tape. I ran one length of tape right down the middle and then two more and used a razor blade to trim it to a fitting oval (pic1). BTW, do not purchase the tape I linked above which is 3/4" and a mil thinner (another Amazon return!), pay more and get this product instead. https://www.amazon.com/dp/B007Y7GIKI/

If you prefer to use screws, do it correctly as Scotty demonstrated, machine screws with nuts and make a backing plate. I used that kind of installation for our TV mount. Never use wood screws into fiberglass as OTT does in way too many installations.

I wanted the fan far back and pretty close to our TV to make the most room possible for our PJ baskets (pic2). Also, in this location the rear window can be cracked on that side to bring in cool fresh air. Chris will be VERY happy on our next trip. We're leaving next week to MN, ND, SD, WY, and the Western Slope of CO!

I don’t have that back window option. No screen. But I do appreciate the tip about the existing hole for wiring. I will bepurchasing the 3M VHB 4950 tape.

**jd1923** · May 21

1 hour ago, Jason Foster said:

I don’t have that back window option. No screen. But I do appreciate the tip about the existing hole for wiring. I will be purchasing the 3M VHB 4950 tape.

What, no sliding windows on newer hulls?

Make sure you get this version of the tape: https://www.amazon.com/dp/B007Y7GIKI/

**John Dorrer** · May 21

How did everyone wire there fans. Wondered whether the wiring could be wired to a 12-volt plug to use the 12-volt plug in the attic.

**ScottyGS** · May 21

14 minutes ago, John Dorrer said:

How did everyone wire there fans. Wondered whether the wiring could be wired to a 12-volt plug to use the 12-volt plug in the attic.

John, On our trailer (2016 model - hull 145) there was a cigarette lighter receptacle on the left wall in the attic. Had to remove the wall to do the installation and I just tapped into the back of that plug. Very easy and you can test it by holding the wires on before you install. Good Luck

**Jason Foster** · May 21

9 hours ago, jd1923 said:

What, no sliding windows on newer hulls?

Make sure you get this version of the tape: https://www.amazon.com/dp/B007Y7GIKI/

They replaced the sliding window in the back with a solid window that swings up as an emergency exit. No screen or prop to hold it open.

**Jason Foster** · May 21

1 hour ago, John Dorrer said:

How did everyone wire there fans. Wondered whether the wiring could be wired to a 12-volt plug to use the 12-volt plug in the attic.

I haven’t wired anything yet, but like @ScottyGSmentioned, I have a cigarette lighter style plug inside the back “attic”.

I can tie into that or the USB plug on the other side.

Either way, the access port used by the TV as @jd1923 mentioned is a good place to route the wires.

**jd1923** · May 21

2 hours ago, John Dorrer said:

How did everyone wire there fans. Wondered whether the wiring could be wired to a 12-volt plug to use the 12-volt plug in the attic.

I did the same as Scotty. The back side of that outlet should have two spade connectors, male connectors on the outlet and female on the wiring. Oliver uses yellow for negative DC wiring and my other wire was purple for positive. The male spades have a small hole in the center, so all I did was to remove about one inch+ of the insulation off the fan wiring, twist it and poke the wire through that hole, wrap it over the top an push the female connector on the wiring over it. They held tight that way and I did not have to splice the existing wiring.

@Jason Foster you could use that center hole for TV wiring for both fans but then you will have lengths of wiring showing across your back area. You could also drill a small hole for each wire, center to the fan mount. I measured the wiring pair at 1/8", so any small drill bit just larger would work. Either way you prefer.

Also, I'm sure I used too much tape. If you use two strips, line them up to the outer edges front and back and trim them oval it will be enough for sure. Don't use the mounting tape they include with the fan. included tape in these kits are always subpar!

Too much tape just makes it a bigger job to remove the mount if need be in the future. However taped this way, if a fan fails it can be replaced with same fan model reusing the original taped mounting plate by loosening the two screws that hold the fan to the plate.

Edited May 21 by jd1923

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