Tjernlund AS1 AireShare Room-To-Room Fan Ventilator, Hardwired,70 CFM

This product helps solve the problem of a cooler (or hotter) room in your home, if you understand its purpose and limitations. 1. It takes air in the hotter room and moves it to a cooler adjacent room at a rate of 75 cubic feet/minute. The effect will depend upon the size of the room receiving the warmer air. 2. The output into the cooler room won't feel like the heat that comes from an air register on your heating system, which is usually about 90 degrees or more. The output air will be at the temperature of the "hotter" room, but because it is moving air, it will feel cooler than that on your skin. For this reason, you should not site the output register close to where anyone would be sitting. 3. Although the fan noise is relatively quiet (much quieter than a bathroom exhaust fan), the input grille shouldn't be placed anywhere where a continuous noise would be distracting. In my application, I was attempting to reduce the amount of electric baseboard heat used in our sunroom addition, which does not have any heating/air conditioning registers in it. I am taking heat from an adjacent utility room, which is small, but has a regular heating/cooling register. By placing the intake of the AirShare unit high up on the wall, it captures the heat trapped near the ceiling and transfer it to the sunroom, with the output register placed close to the floor. The fan noise in the utility room is not a problem, since we don't spend much time in there. There is no noticeable noise of the air exiting in the sunroom, and the register is located away from seating areas. Over the last few cold nights (readings in the teens!), the baseboard heat has been set to "low" and doesn't appear to be running as much. I will revise this review when I have some data on the impact on my electrical usage. The AirShare unit is well made and the fan is well-balanced. Installation was relatively easy, if you know how to locate wall studs, can handle a sheetrock saw and can safely do electrical wiring. i put a simple on/off switch in the fan circuit, since I expect to have to run the fan continuously during the heating season.

MY NEED I have a closet I use for all my electronics. There are two servers, a DirecTV box, a receiver, a XBOX One and all of my networking equipment. In all, they give out enough heat to raise the temperature of the closet by about 30 degrees with the doors shut. We had too find a solution other than leaving the door open all the time. INSTALLATION Installation is very easy. The kit comes with a cutting diagram to make the proper cuts on both sides of the wall. You will need to find the studs, because the fan needs most of the space between the studs. Also, you will need to offset the supply and return sides vertically. The fan blows air into the dead space between the studs, the supply then catches this positive pressure and exits the air from the dead space through a very small plenum. It works very well. I also installed a thermostat (see below). This was very simple. I got a thermostat that was rated for inline usage. You won't be able to use a thermostat like the one in your house, you'll need one rated for at least 110v and 15amps. Anyway, I installed this inline and the fan is working great. I just put it between the power supply and the fan. Everything you need, other than the thermostat, came in the box. Screws, plates and mounting instructions. I would suggest getting a multitool to cut the wall, it makes installation much easier. Once installed, the entire thing looks great. GENERAL REVIEW So far, this is exactly what we were looking for. The fan is very quiet, barely noticeable at all. The supply plenum is very small, about 3 inches by 16 inches. In our installation, we put it just below the ceiling. You can feel the air if you put your hand beside it, but otherwise the hot air is dispersed very well. Because of the quiet sound and the direction of the plenum, most people don't even notice it all. As for the fan's ability to exhaust the air from the server closet, it works very well. It creates enough negative air pressure to pull the air from under the door, but still keep enough air moving to cool the room. If your room is sealed tight, you will need to figure out a way to get air into this room through another opening, but for us, the space between the door and the floor has been enough. THERMOSTAT In case you would like a thermostat, this one works: http://www.amazon.com/gp/product/B000E7BTFO/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1 The manufacturer has a wireless thermostat is likes to sell, but it is unnecessary if you want to do the wiring yourself (and it costs over 100 bucks). Since the thermostat above is a lot cheaper, I chose it. I installed it so the fan would cutoff when the closet is below the temperature I feel is safe. Although the thermostat feels a little redundant now because the servers put out more sound than this fan does. It really is very quiet. I wouldn't mind just leaving it on all the time, but I went ahead and installed the thermostat.

Just installed this fan and am very happy with it. Quiet, moves plenty of air and relatively easy to install. One comment is the instructions don't emphasize that both the fan and the diffuser are directional, that is, they each have an opening which must face the other. If this is not noticed, either unit's housing would block the air flow towards the other unit Tjernlund AireShare Room-To-Room Ventilator - Hardwired, Model# AS1 . Another thing to note is the possibility of a 'block' in the wall cavity. If one unit is mounted high and the other low, one needs to probe the cavity to make sure there is not a 2x4 block midway. The hard part of this installation is accessing and wiring power to the fan, which can involve cutting access holes in the wall and possibly installing a junction box. Not for the casual do it yourself person. In short, a professional product and far better than the usual cheap, noisy bathroom fan.

Easy install, works as expected. We have a ductless heat pump in the main area. This fan allows use to close bedroom doors and still get heat/cooled air from the main living area into the bedrooms.

Installation was as expected. The unit is a bit noisy compared to the amount of airflow that is generated.

The return window was far too short a buy that has installed this item only had about a few weeks to let it run and be tested. I did not have time to install right away as it is a large job but when I did I was surprised at the noise level considering it was over $250 item then I discovered the return window had closed. I am trying to find out how to have it replaced from Amazon

We had an electrician come and install the unit. It was pretty easy, but be sure to read as he cut the big hole on the inside. As we are using the unit to move AC to a bedroom from a hall it was backwards. We have a heat-pump and it blows the AC down the hall, but we like to sleep with the door closed and found the room too hot! This unit helps, but it is not the same as AC. I am glad we did buy it!

Used the fan to ventilate a 120 sq foot bedroom to lower CO2 levels due to needed to close windows and doors with blackout blinds. Works as designed. Able to lower CO2 from 1400ppm down to 650ppm with 2 people sleeping in the room. Fan generates 6 decibels on the output side (standard drywall with metal joists). The input side is much louder however we are not on the side of the wall when running.