Reddit mentions: The best roofing vents
We found 51 Reddit comments discussing the best roofing vents. We ran sentiment analysis on each of these comments to determine how redditors feel about different products. We found 35 products and ranked them based on the amount of positive reactions they received. Here are the top 20.
1. Camco RV Roof Vent Cover, Opens For Easy Cleaning, Aerodynamic Design, Easily Mounts to RV With Included Hardware - (White) (40431)

Sentiment score: 2
Number of mentions: 4
2. Lambro 3005 Vent Tite Fit, Titefit 90 Degree Rectangular Dryer Duct, Extends from 18" to 30", 26 Gauge Aluminum
Tight space dryer venting solutionExtends from 18" to 30"26 gauge aluminumPackage Contains: (1) - TiteFit 90 Degree Rectangular Aluminum Dryer DuctPackage Size: 6 1/2" x 4 1/2" x 24"

Sentiment score: 1
Number of mentions: 3
3. Cool Attic CX2500UPS CX2500 gable-vents, 2500
1650 Cfm (Cubic Feet Per Minute) Superior Energy Efficient Gable Mount Attic Exhaust VentilatorVoltage:110 V

Sentiment score: 1
Number of mentions: 1
4. Lippert Components 389381 360 Siphon Roof Vent Cap - White (Gen 2)
Prevents odors and gasses from invading RV living spaceSpeeds up waste breakdown, eliminating the need for chemicalsSophisticated, patented design with no moving partsEasy installation and universal fitBuilt-in bug screenNo maintenanceAvailable in Black or WhiteMeasures 99-1/2" long x 19-1/8" wide x...

Sentiment score: 1
Number of mentions: 1
5. Cool Attic CX1500 Gable Mount Power Attic Ventilator with 2.6-Amp 60-Hz Motor and 14-Inch Blade
VENTILATOR FAN: This is a 1300 CFM Power Attic Gable Mount Ventilator with a 2.6 Amp thermally protected motor, a galvanized steel flange, and an automatic thermostat.ATTIC FAN: The Cool Attic Gable-Mount Attic Ventilator Fan offers effective power attic ventilation to reduce heat buildup, equalize ...

Sentiment score: 1
Number of mentions: 1
6. Maurice Franklin Louver-2.5" Round Aluminum Louver with Insect Screen (Priced Per Bag of 4). Item# 2.5" RL-100
Package of 4 vents.Easy to install in wood. Not made for metal, glass, or PVC pipe.Fits in a 2.5 inch round hole.Built in insect screen. For display cases, spice racks, reptile cages, etc.Specification sheet is at http://mflouver.com/content/rl-100-rlw-100-rlbl-100-rlb-100-series

Sentiment score: 1
Number of mentions: 1
7. ECO-WORTHY Solar Power Attic Gable Fan 3000 CFM 12 inch Solar Powered Attic Fan with Upgraded Fan Motor + 25W Portable Solar Panel
[ Warranty ] - Two year warranty. If the motor of the solar fan doesn't work, or you find the unit miss some part, such as the screws, please feel free to contact our customer service REP, we will send you replacement parts, thanks. And the spare motor also can be purchased separately from us.[ Upgr...

Sentiment score: 1
Number of mentions: 1
8. Maurice Franklin Louver RLW-100 4, 4-Inch Mini Round Aluminum Insect Proof Mini Louvers With Screen, White (Pack of 4)
Pack Of 44-Inch White Aluminum Round Insect Proof Mini Louvers With ScreenOverall Size 4.625-Inch Fits 4-Inch Hole Diameter3.5 Square Inch Free Area

Sentiment score: 1
Number of mentions: 1
9. Cool Attic CX2121 Automatic Gable Vent Shutter, High Impact One-Piece ABS Cycolac Frame, 22" W x 23" H x 3" D
High-impact, galvanized steel Frame, felt-padded 0

Sentiment score: 1
Number of mentions: 1
10. 2PK 16.OZ Prop Bottle (Pack of 2)
DO IT BEST CORP 2PK 1LB PROPANE CYLINDER

Sentiment score: 1
Number of mentions: 3
11. Vent Seal Plus - 2 in. Full Skirt
Affordable Roof Vent RepairEasy and Quick InstallationMinimum Pipe Length: 6.5" above roof lineFits Roof Pitches Between 2/12 and 6/12. If your pitch is 7/12 or steeper, please contact.Skirt Diameter: 5.5"

Sentiment score: 1
Number of mentions: 1
12. Duraflo 620808 Gable Vent, 10-Inch X 10 7/8-Inch
High UV resistanceCSA approved10" x 10 7/8. In. Net Free Area

Sentiment score: 1
Number of mentions: 1
13. Broan RVK1A Roof Vent Kit
Includes 8 feet of 4", flexible, 2-ply metallic laminateducting, 4" diameter metal duct connector, 2 ductclamps, 4" to 3" reducer and Model 636 Roof CapDuct conforms to UL181 Class 1 air connector requirements

Sentiment score: 1
Number of mentions: 2
14. Builders Edge 140147079030 Vent, Paintable
The Builders Edge Square Exhaust Vent Exhaust Vent For Side Walls With Patented Exhaust Flaps Which Stay Closed When Not In UseOur Patented Snap-On Trim Ring Makes Installation EasyAvailable In 24 Colors To Match Your Siding Manufacturer And A Paintable Option To Easily Match Your HomeBrand Name: Bu...

Sentiment score: 0
Number of mentions: 1
15. Oatey 39012 ABS In-Line Vent 2X2 13/16,Black
ABS constructionUse to vent drain linesHelps prevent sewer gas from entering your homePush to connectSpring-loaded to open with negative pressure and close with positive pressureMechanical Vent installs on the drain line and vents the line without allowing sewer gas to enter the home.For venting sin...

Sentiment score: 0
Number of mentions: 1
16. Home Self Defense Products Quick Vent Safe with RFID
Blends In Anywhere: With the look of a normal vent on the wall, it's great for home, office or businessHigh Speed Security: The Quick Shelf is the fastest access safe on the marketQuick Installation: 5 minute installation with instructions and template right on the boxBack up battery: Easy way to op...

Sentiment score: 0
Number of mentions: 1
17. Dundas Jafine BLH6WZW Louvered Vent Hood, 6", White
The product features a 3 louver damper system that prevents cold air, snow or rain from entering the home and the Louvers have been redesigned to prevent them from stickingCap has a recessed caulk line to assist in a clean caulking applicationUV resistant coatingPaintable

Sentiment score: 0
Number of mentions: 1
18. Imperial 4" Louvered Vent Cap with Metal Screen, White, GG-4W
Easy to install louvered vent cap for dryer and bath fan ventingPaintable plastic components contain UV stabilizer to reduce fading due to exposure to sunlightHigh-impact poly plastic constructionKeeps out birds and rodents

Sentiment score: 0
Number of mentions: 1
19. Owens Corning Attic Stairway Insulator
The Attic Stairway Insulator closes the insulation gap created by attic stair access points in residential housing, to help reduce energy costs year round; No assembly required - simply unfold and place over attic openingThe product is designed to cover access points up to 25-1/2" x 54"; fitting maj...

Sentiment score: 0
Number of mentions: 1
20. BUD Industries IPV-1116 IP32 Air Vent, 3.9" x 3.9"
used to equalize internal and external temperature and pressure, and to prevent internal condensation. Vent comes with housing, gasket, and locking nutDesign to meet IP32 protection levelMade of Gray Polycarbonate (PC) reinforced with 10% fiberglass

Sentiment score: 0
Number of mentions: 1
This all depends on how much work you want to do, how you are with basic electrical connections and how much you want to spend up front vs how much you'd rather spend in electricity. Not that I've looked into this in any way.....
If you just hook up a standard gable fan like this it will run well enough and probably cool your shed a fair amount. You can also include a thermister like this which will give it a high and low threshold for operation. These can get pretty noisy though and if you leave it running all the time you'll probably see it on your bill.
For a bit more up front you can go with a full solar gable fan. Some models also allow connection to your 120v system so you can run them at night or during low sun conditions. These are great for situations like yours (or like my detached garage) where there isn't electrical yet or where you don't necessarily want to pay to have a fan run 10+ hours a day.
Vehicles run on the same output as solar panels (for the sake of this discussion) so you could easily cobble something together for less than $100 that would push as much air as one of those larger gable fans but also charge your cordless batteries, run low voltage lights, etc. You can also DIY a solar kit. I can get into the product details if you want, but overall you'd need:
If the fan is too noisy or moving too much air (in extreme cases, depressurization can be an issue) you can control fan speed with something like this and I'm sure there are 12v temp controllers as well.
https://www.amazon.com/Lippert-Components-389381-White-Siphon/dp/B01CZQ9Y6M/
That will create suction on the end of the hose if it's in the wind. Ideally, on the roof. I suppose you could try mounting it under the floor, reversed. No idea if that will help.
Otherwise you may have to do something to upgrade your fan situation. The tiny computer fan that's in there just can't compete with the other pressures. A 12 cm fan with higher capacity might be able to do the job but fitting it onto the hose would take some fabrication work.
You'll just have to keep your windows closed when you drive so the pressure in the van isn't dramatically lower than it is outside.
Other people have had this same issue when they have all their other ventilation closed, and turn their Maxxair or Fantastic fan to warp speed. The huge fan and all those cubic feet per minute of air just completely overwhelm the tiny little fan in the toilet and it doesn't have a prayer of keeping the air flowing the right way.
Not pictured, some weather stripping foam under the plywood in hopes of damping some vibration. Also I forgot to take pictures of wiring into the outlet in the crawl space.
The fan is a CX1500 "Cool Attic Power Gable Ventilator Fan"
The tools/materials I ended up needing:
I prepared the plywood first using the fan to draw a guide for the jigsaw. Drilled out a starter hole and followed the line with the saw. Also learned that I am bad at following lines.
I had the 2x4 cut into 2' sections at Lowe's to save me some effort.
Up in the crawl space/attic I nailed the 2x4 sections up, nothing special there and sprayed some sealant I had around. I also filled in some gaps in the gable vent (not pictured) with some foam backer rod I had extra of.
Next went up the plywood with the cutout, I attached that with screws using the drill, much easier than swinging a hammer around up there. In hindsight, I should have picked up some longer screws and done the 2x4s with that too.
Brought up the fan, mounted the brackets and mounted it to the plywood with screws. Had to bend it back a bit and adjust because there isn't a terribly large amount of clearance between the blades and the mounting bolts. If you buy one of these take note of that.
I screwed the thermostat box to the brace in the path of the fan, wired in one end of the electrical cable following the instructions in the box - very straight forward. The load on the fan is fairly low, you can get away with 14-2.
With everything else done, I killed the power and opened up the outlet up in the crawl space just across from the air conditioner blower. Didn't take any pictures of that, but basically just tied it into the black, white and ground wires from the house and closed up the outlet box. I removed the outlet to do it because I've never used it, nor have service techs. They just run an extension cord from in the house.
Brought up the power and the fan worked. All in all if I take out the stop for breakfast, probably took me 2 hours. Hopefully it helps bring down the temps up there and make my summer bills a bit better.
Edit - that thing I'm wearing in the picture is a Frogg Togg Chilly Dana, bandana. Really did help keep me cooler and acted as a sweatband.
I definitely recommend covers as well. I've had plenty of rainy stuffy days where I couldn't open a window and was glad to have vent covers. Raises your roof line a bit though(broke one on a tree once). Really easy to install a replacement if it happens. Only cost about $20 each and don't require any sealing, they hover just above the roof.
https://www.amazon.com/Camco-Cleaning-Aerodynamic-Included-40431/dp/B000BUQODG
Actually it is this video. (In my area, going through the side gable is not up to code.)
This was the kit I bought which made things easy. I wrapped the vent pipe in insulation which I bought at Home Depot.
I watched the video a few times then went to work. Pretty easy.
This is really nice looking.
I know you used treated wood, but it will get wet and swell with any moisture. I'd suggest pulling that axle and putting a really good enamel paint down on the underside.
Also, people are asking about cross venting for heat. Why not put a couple of these on the sides? http://www.amazon.com/Maurice-Franklin-Louver-2-5-Aluminum-Louver/dp/B00AFESMDS/?ie=UTF8&qid=1408463010&sr=8-6&keywords=eave+vent+covers
You could easily add a 12v solar cell just wire it directly to two 3" computer fans (one on either side). Have a couple lower ones on her side and then a couple upper ones in the back with the fans.
These would install quickly and not damage your aesthetic.
I bought a "cheap" setup on amazon for my greenhouse. ~$175 while the expensive units are about $300. Its not nearly powerful as i wanted but makes my plants dance so i continue to use them
ECO-WORTHY Solar Power Attic Gable Fan with 65-Watt 18-Volt Efficient Brushless DC Motor and 25-Watt 18V Solar Panel https://www.amazon.com/dp/B01MQRU3B1/ref=cm_sw_r_cp_apip_jF34WLG9u8hmY
Edit: something else i learned during my search, the roof mounted ones are for boats and RVs
Would this work for you?
Not to mention the amount of lint cleaning you have to do, it's a fire hazard, energy user and will wear out your dryer pretty fast. I hope you're using metal duct.
I have a similar issue where a periscope wouldn't work, but I used 4" flexible metal duct. I looped it up and over the gas line and then out the side wall.
Otherwise, is it possible to re-locate the vent hole?
Nice work. I did something similar with the same toolbox. If you run into overheating issues, you may find that another hole will help with airflow. I used these louvers.
Most are a standard size. You can safely buy one from Amazon...
Replacement vent
And this is what I put over my vent:
Vent cover
You don't have to worry about rain getting in, and theoretically, you can drive with the vent open.
Curious to see how much if any air from the hot exhaust migrates into the intake. Pink ribbon test held at various distances between the two holes when grills are/aren't attached? It looks like there is room to enlarge the intake hole higher and if there isn't any air migration, to the right. 100 degree intake might indicate some commingling so maybe not the right. Most of your big gains in performance may have already been made.
Another exhaust vent style.
Benzomatic TS8000 with the large camping propane tanks and if you really want to do it right, add a searzall.
Kenji's steak advice (Step 10A) is to use the torch WHILE finishing on your castiron - Which i find helps a LOT.
Have you been in the attic to see where its coming from?
Might be from a roof vent that is leaking. Most will last about the life of the roof but could have been damaged during install, squirrels, etc...
Very easy fix with something like these...
https://smile.amazon.com/Vent-Seal-Plus-Skirt/dp/B004LDYILO
https://smile.amazon.com/Oatey-Rain-Collar-No-Calk-Flashings/dp/B001AZ46O0
https://smile.amazon.com/PermaBoot-5531-3-Inch-Repair-Black/dp/B0047WL9SE
Take some pictures and post.
I did just that for a GPU rig, though it was fairly gerryrigged. My basic shopping list:
Assemble the shed and install the shelf, cut two holes in the front doors at the shelf level for the gable vents and one big hole in the back at shelf level for the window fan, and install/wedge items in holes accordingly. Cutting the holes was a pain, I thought a Dremel would work well but it's slow and loud as hell so I ended up using a drywall saw that worked surprisingly well. I ran a cord for a power strip out the back under the fans.
Mine sits at the back of a covered patio that's about 8-10 feet deep, so it's not directly exposed to rain or any significant elements. You might be able to make it work if you've got some overhang and you can put the back of the cabinet up close to a wall where water won't hit the fans too much. I also glued some dust filter material to the inside of the gable vents to help filter dust out, and I blow the setup out every now and then.
That's going to be rough. Will the HOA approve dryer vents on the front of the house? Similar to this here
I know you said NO vents, but it's a dryer vent... :)
It shouldn't since your p-traps should keep any gasses out of the RV from the grey tank.
I'd look for the anti-siphon valves. They're usually under a sink, they usually look like this.
You do know that vent covers are like $20 and would easily fix your problem?
You need something like this on the exterior.
https://www.amazon.com/dp/B001AH5J8A/ref=psdc_13397451_t3_B004Q0A5F0
I used this for a similar setup. Maybe it will work for you too
Dryer Vent Tite Fit, 90 Degree 18" to 30" https://www.amazon.com/dp/B000KKKGJ0/ref=cm_sw_r_cp_apap_iGQNfuudYJhBI
I like this one.
https://www.amazon.com/Quick-Vent-Safe-with-RFID/dp/B00P9QM9YA
Condensation happens when air comes in contact with something below the dew point. As long as your PC is above outside air (which it should be) you have no issues there. However bugs/pollution/snow/rain droplets. You could get a dryer exhaust duct and filter. The filter will stop most bugs and a U shape would hopefully prevent anything else from reaching your computer. As an added benefit you'll be able to have your computer further away from the window.
Everything I've read advises against pressure washing roofs. Only soft washes are ok. If it's energy savings you're looking for, I might suggest some more insulation in the attic, and one of those pink panther insulation covers for your attic stairs. That has done a lot for my home.
You can find enclosure exhaust ports with a hood on Amazon. Like this guy:
https://www.amazon.com/BUD-Industries-IPV-1116-IP32-Vent/dp/B00L3QU294/ref=mp_s_a_1_3?keywords=project+enclosure+vent&qid=1564685836&s=gateway&sr=8-3
http://i.imgur.com/1lJvL.jpg
Adjustable slide vent... I've been in those situation
Home depot; menards carry 3"-4" reducers
http://www.amazon.com/gp/aw/cr/B000KKKGJ0/ref=aw_d_crstars_miscellaneous
My only recommendation at this point would be to get some of these.
Just these ones https://www.amazon.com/dp/B016T42AIA/ref=cm_sw_r_cp_api_xsG2Ab1H0X116
Not OP, but:
torch
tank (can be had much cheaper at any home supply or hardware store)
Searzall