Customer Reviews

Tjernlund UnderAire Crawl Space Ventilator - Deluxe Two-Fan, 220 CFM, Model# V2D

5 star:		(17)
4 star:		(4)
3 star:		(1)
2 star:		(2)
1 star:		(0)

 

 

I purchased this for my crawl space a few weeks ago. We've had dampness issues and with all the Atlanta area flooding/rain, I figured it would be an asset. I'm sure it is doing some good with air movement but it's so darn loud despite having exchanged it once already and making sure to install it to manufacturer's specs. From the reviews I had read, I expected to not hear this at all. However, in my essentially ranch style home with a 3-4 foot tall crawl space, it's as loud or louder than my A/C. Even my wife who normally thinks I blow things out of proportion and am too sensative thought it was just too noisy, especially at night.

I'll probably move it to the a far corner of my home and set it for "biblical floods" only, the humidistat at 80 percent or higher. I'd give it one start but I'm sure it is moving air under the house, so it's probably doing 2 stars worth of good-but at a price.

I too had high hopes that this device would "quietly" mitigate the humidity (RH) levels in our 2000 sq. ft. concrete-enclosed 42" crawl space.

Our Tjernlund V2D device is completely isolated from the wood floor joists (mounted directly & with rubber bushings, onto the top concrete foundation wall and up into the joist cavity, without touching any wood). Different foundation vent locations where tried but in each of them and in the quiet of the night we could definitely hear the run of the twin fans in our living areas upstairs, even under heavily insulated hardwood floors.

We've since _compromised_ on a vent location that is more remote from main living or bedroom areas.

To be clear, the V2D does seem to move along its rated amount of air, but at the expense of velocity noise (and frequency vibration if contacting any house structural components).

Another observation: the enclosed humidistat seems to sense the RH just at its mounted location -- the foundation vent. This tends to skew the results for the rest of the crawl space. It has to be set way too high in order to match the digital hygrometer reading that is installed further into the crawl space area. To help solve that problem of always being 'on', my plan is to now separate the humidistat from the V2D unit and mount that component further into the crawl space as well.

At first I was impressed with the build quality and value of this unit. In fact, when first checking the device while being handheld it provided no clue (except it's attempt to levitate) as to any problems that would arise when actually mounted in application : it spun very solidly.

Perhaps the sting of the purchase could have been partially addressed by purchasing as separate fan and humidistat units ..and of course, thinking very hard about the amount of _quietness_ I was prepared to give up. And yes, it would have been quite helpful to have read more objective comments on this type of device before purchasing.

Installed two of these in my crawl space. They work well, run fine, and are well made. Initially, I had some noise issues and determined it was the vibration from the fans running. Fairly easy to fix, just isolate from the frame of the house. I used some strips of foam and rubber-covered washers and that solved the noise problem.

Time will tell how durable and well these fans perform. They were only recently installed,so can't go 5 stars and say I love it yet,but so far they are all I expected,seem like a well made unit, and are functioning great so far. These are a bargain compared against other brands when you figure in the built in humidistat along with the built in freeze protection, which I don't think was mentioned in the description. I ordered through Patriot Supply and service from them was great,as was Amazon's. Couldn't believe how fast they arrived.(2 days- and I'm out in the sticks)

i can't tell you how much i hesitated buying this fan after reading reviews that said the fan was loud. i hate appliance noises. lost sleep over it.

all for naught!

this thing is SUPER QUIET and the fans are of higher quality than i was expecting. I am super satisfied. i'll try to upload a video soon so you can hear how quiet it really is. at one point i almost had to look to see if the blades were spinning.

Installed fan in 15 minutes and moisture has disappeared.
Can't even tell it's there. No noise.

I almost didn't buy this unit after one customer complained about it being noisy. I'm glad I pulled the trigger because this is a very good unit! The fans are "not" noisy and in fact I was impressed with how quiet they are. I can not hear the fans at all when in the house and standing directly over the unit located in the crawl space. I can hear them when I'm out side but need to be within about 10-15 feet of them. For this reason, I installed them in a location away from my patio and porches so it isn't an issue.

Before installing, I put weather strip on the inside of the metal all around the perimeter. I used 1/2" thick weather strip. This allowed the unit to easily mount against the cement block and wood sill board without any problems. The top two screws went into the wood sill and the bottom two screws went into the cement blocks. The weather strip provides a nice seal and prevents vibration transfer to the house.

A very good unit and works well. I can tell the fans are of high quality and the design is solid. Only suggestion would be to have the manufacturer include some rubber grommits in with the packaging for further isolation. Not necessary but might help some peoples install.

I just installed this fan and the V1D in my crawl space. After determining the best location to mount the fans, the installation was pretty easy. I had read other reviews that stated they were noisy and vibrated so I took the advice of others and installed neoprene matting on the face to act as an isolator. I asked my wife, who is pickier than I am, to go into the bedrooms above the fans and tell me if she hears anything. She said they were quiet. I would recommend these products and possibly put some foam or matting between the fan and the foundation just as a precaution.

I used this in a customers crawl space and it is working wonders!!! They had a moisture and mold problem. The smell has gone away and the humidity level has dropped considerably. I used it with some self opening and closing vents.

Once upon a time I bought a house with standing water inside the foundation. the county building inspectors said that was not an inspection issue as it was "inside" the crawlspace. My sons and I drained the crawlspace of over 3,000 gallons of H2O. I put in a drywell and for years could not get the crawlspace to dry out;dampness was persistently present. the installation of the two fan system went easily and helped to dry out a decades old problem. A circumfrential interior drain system installed professionally took care of the periodic water that accumulated from swollen underground springs and the Fan system finished the job!! pleased in all respects. Quiet, efficient and effective! great product:-)