Sprinter-Forum    
 

Go Back   Sprinter-Forum > General Forums > Sprinter Talk

Sprinter Talk General discussion about anything and everything about Sprinters.
SubForums: Events Scanners


 
Thread Tools Display Modes
Old 08-03-2019, 04:52 AM   #1
joeDiHare
 
Join Date: Jul 2018
Posts: 12
Thanks: 7
Thanked 2 Times in 1 Post
Default Location of second fan: floor or roof?

I installed a fantastic fan on the rear part of the roof.

Since the Sprinter (T1N) doesn't have windows, a second vent (more like a whole with a net) is necessary for wind flow.

Would you recommend a floor or roof vent?

The ceiling seems more common, but think about it, a floor vent
- doesn't have rain-leak issues
- sunlight leaks
- it's pulling in (possibly) cooler air
- it should provide more flow with the other vent being on the ceiling
- and it doesn't take space from, say, solar panels.

I wonder if I am missing some cons?
joeDiHare is offline   Reply With Quote
Old 08-03-2019, 05:09 AM   #2
john61ct
 
Join Date: Apr 2018
Posts: 1,922
Thanks: 33
Thanked 445 Times in 382 Posts
Default Re: Location of second fan: floor or roof?

Need to seal while the engine is running, or at least while driving, depending on location.

And critter screening.

Marine deck plates work well.
john61ct is offline   Reply With Quote
Old 08-03-2019, 01:38 PM   #3
Onefin
 
Join Date: Mar 2013
Location: Carlsbad, CA
Posts: 1,211
Thanks: 741
Thanked 530 Times in 363 Posts
Default Re: Location of second fan: floor or roof?

Quote:
Originally Posted by joeDiHare View Post
I installed a fantastic fan on the rear part of the roof.

Since the Sprinter (T1N) doesn't have windows, a second vent (more like a whole with a net) is necessary for wind flow.

Would you recommend a floor or roof vent?

The ceiling seems more common, but think about it, a floor vent
- doesn't have rain-leak issues
- sunlight leaks
- it's pulling in (possibly) cooler air
- it should provide more flow with the other vent being on the ceiling
- and it doesn't take space from, say, solar panels.

I wonder if I am missing some cons?
Floor vent works. Graphite Dave has long been a proponent of them.
https://sprinter-source.com/forum/sh...ad.php?t=38276
Onefin is offline   Reply With Quote
Old 08-03-2019, 04:01 PM   #4
GSWatson
2013 144
 
GSWatson's Avatar
 
Join Date: Dec 2015
Location: Petaluma, CA
Posts: 1,523
Thanks: 233
Thanked 570 Times in 394 Posts
Default Re: Location of second fan: floor or roof?




Cheers,
Greg
GSWatson is offline   Reply With Quote
Old 08-04-2019, 02:01 AM   #5
NMmonkeyman
 
Join Date: Apr 2017
Posts: 21
Thanks: 0
Thanked 7 Times in 5 Posts
Default Re: Location of second fan: floor or roof?

I have two 2x10 floor vents and no other opening windows. Works very well with roof fan and you can feel the cool air coming in from underneath. Have a typical floor register in place and a small rug to cover them when not in use. I would recommend floor vents as easy way to improve airflow when used with a roof fan.
NMmonkeyman is offline   Reply With Quote
The Following User Says Thank You to NMmonkeyman For This Useful Post:
OrioN (08-04-2019)
Old 08-04-2019, 02:29 AM   #6
john61ct
 
Join Date: Apr 2018
Posts: 1,922
Thanks: 33
Thanked 445 Times in 382 Posts
Default Re: Location of second fan: floor or roof?

Just be 100% sure carbon monoxide cannot enter while the engine is running.
john61ct is offline   Reply With Quote
Old 08-07-2019, 03:18 PM   #7
brucedog
 
brucedog's Avatar
 
Join Date: Oct 2015
Location: Hood River, OR
Posts: 97
Thanks: 63
Thanked 46 Times in 24 Posts
Default Re: Location of second fan: floor or roof?

We have two roof vents and love them. When we sleep we close all windows, set forward fan to exhaust which pulls cold air quietly right onto our faces through the rear fan. Think about it...is the night air really that much colder ten feet lower? Just my opinion ��
__________________
Bruce
2015 170 4x4
2x100w Solar Panels w/ Blue Sky Controller, 224ah AGM aux batteries with Intelli Power 9200 Charger, Dometic 3.8 cu ft AC/DC Reefer, Espar D5 Cabin/Water heater, Thetford Cassette Toilet, Fiamma F65 12.2' Awning, 25 gal fresh water, 3 Panel Bed, Custom Cabinets
brucedog is offline   Reply With Quote
Old 08-07-2019, 03:34 PM   #8
OrioN
2008 2500 170" EXT
 
OrioN's Avatar
 
Join Date: Sep 2007
Location: Vancouver, BC
Posts: 11,164
Thanks: 623
Thanked 2,788 Times in 2,030 Posts
Default Re: Location of second fan: floor or roof?

Quote:
Originally Posted by brucedog View Post
We have two roof vents and love them. When we sleep we close all windows, set forward fan to exhaust which pulls cold air quietly right onto our faces through the rear fan. Think about it...is the night air really that much colder ten feet lower? Just my opinion ��
I thought about it......


....not biting, one fan and one floor vent is still better than two roof fans. Why? No need to run the fan motor to get the inside air as cool as the air outside under the van.
OrioN is offline   Reply With Quote
Old 08-07-2019, 03:57 PM   #9
elemental
 
Join Date: Jul 2017
Location: USA PNW
Posts: 550
Thanks: 224
Thanked 357 Times in 240 Posts
Default Re: Location of second fan: floor or roof?

Sounds like both approaches have merits and drawbacks. It is good that we all can make our vans as we want, rather than be forced to a single plan from a single vendor. I myself am planning on two roof vents with fans on a 170" wheelbase van, although I seem to be taking my own sweet time cutting the second.

I've thought about the floor vent/ceiling vent combination as several have recommended it from actual experience. I have decided to stay away from any openings in the floor of the van so as to keep the elements at bay while driving in inclement weather, especially with winter roads treated against icing. Potential carbon monoxide intake to the living space should the exhaust spring a leak also was a risk I thought to avoid, although it would only be a problem if the engine were running. I have managed enough roof real estate on a 170" wheelbase van to have two fans, one forward, one aft, with 4 solar panels in between; this also provides simultaneous intake and exhaust so as to achieve a gentle flow through. On a 144" wheelbase the roof real estate would be more precious, and the floor vent's benefits would take on more allure for me, I think.
__________________
--
2017 Sprinter 2500 170 Crew OM642 5-speed auto with Adventure Wagon interior&MOAB
elemental is online now   Reply With Quote
Old 08-07-2019, 04:07 PM   #10
OrioN
2008 2500 170" EXT
 
OrioN's Avatar
 
Join Date: Sep 2007
Location: Vancouver, BC
Posts: 11,164
Thanks: 623
Thanked 2,788 Times in 2,030 Posts
Default Re: Location of second fan: floor or roof?

Quote:
Originally Posted by elemental View Post
Sounds like both approaches have merits and drawbacks. It is good that we all can make our vans as we want, rather than be forced to a single plan from a single vendor. I myself am planning on two roof vents with fans on a 170" wheelbase van, although I seem to be taking my own sweet time cutting the second.

I've thought about the floor vent/ceiling vent combination as several have recommended it from actual experience. I have decided to stay away from any openings in the floor of the van so as to keep the elements at bay while driving in inclement weather, especially with winter roads treated against icing. Potential carbon monoxide intake to the living space should the exhaust spring a leak also was a risk I thought to avoid, although it would only be a problem if the engine were running. I have managed enough roof real estate on a 170" wheelbase van to have two fans, one forward, one aft, with 4 solar panels in between; this also provides simultaneous intake and exhaust so as to achieve a gentle flow through. On a 144" wheelbase the roof real estate would be more precious, and the floor vent's benefits would take on more allure for me, I think.
Close the vent while driving.
OrioN is offline   Reply With Quote

Tags
fan, floor, vent

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT. The time now is 10:04 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2020, vBulletin Solutions, Inc.