Tjernlund HS1 Gas Sidewall Power Venter Fan

I recently put a standing seam metal roof on my house. To preserve the clean, modern lines of the roof, a wanted to eliminate as many penetrations through the roof as possible. I installed this unit to vent my high-temp furnace through the gable. This is unit is easily configurable wrt pre-evacuating and post combustion. There is a reed pressure switch to ensure the unit is moving air as a safeguard. I interrupts the call for heat at the thermostat, which eliminated a run all the way to the furnace in the crawl space. Essentially all you need is interrupting the solenoid, you can do that almost anywhere. I ran class-b flex to the high-temp vent. Works great.

Fired right up the first time and worked like a champ.

I used this to replace an 8 year old identical unit.. The hs1 control proved to be a wiring nuisance, so I gutted the relay from the old tjernlund unit, and wired it up the same way as the one I took out.. For the record I replaced this in -2 degree weather, and didn't want to spend 6 hours installing and rewiring the already hacked wiring on the gas valve, only to end up with frozen pipes. The hs1 control is nice but it's over engineered.. They merely did it to get the relay away from the motor. When these units fail they vibrate, the vibration can cause the relay to trigger on and off and cause a "clicking gas valve".. They only fail when they start losing fins on the blower wheel, causing a imbalance vibration.

Product circuit board was defective. No fault of the seller. It was diagnosed by Tjernlund tech support and they promptly sent out a new board.I would buy it again.

Works great, noise level was as expected. Slightly difficult to wire up.

I cannot get this to work with my furnace. I called their tech support line and after explaining my issues in major detail, I was met with a very rude and unhelpful "guy" that literally told me "I have to move on to my next call" and "your system is very complicated" and immediately became defensive, stating that their system is FINE and nothing wrong with it, etc. etc. etc. but actually tech support could not figure out what was wrong either...."it's too complicated"Complicated to me, yes, but it's a simple natural gas forced air furnace with a 24vac gas valve, single zone, no other bells/whistles AND NO LABELS!. Yet, it's just too complicated to deal with, too much to think about, let's just forget it. When a company refuses to help you and quickly releases you into the depths of the unknown, it really leaves a bad taste. I called an HVAC contractor and they are far more helpful. Apparently if you do not have a brand new furnace you'll have to deal with the harsh attitudes of the elite customer service technicians at Tjernlund, who remain silent when asked a question and get overwhelmed when you tell them the whole story.I guess even an amateur with no experience with HVAC can confuse them. Everyone says "call their customer service, they are great!" well not so much. If the guy had as much knowledge as his inflated ego, he'd easily be the modern day einstein.In the middle of me explaining, I get the response - "well, obviously something isn't right, but I don't know what it would be".....apparently not. Hopefully the next caller has heat because I do not at this point.UPDATE: The thing works, after fighting with customer service and asking to speak with their supervisor, they finally helped. This is an excellent solution to more expensive models. I think the key is to mount this thing as far away from the furnace as possible, otherwise you will burn it up. I have it mounted about 30 ft downpipe from my furnace and it has worked great overall, aside from the major attitudes of customer service.

Bought to replace original on my 25 year old furnace. Everything fit nicely, was a small wiring issue that we had to address. The wire that allowed the purge motor to turn on at the right time was not the same color as the original but was findable. This was a much more reasonable expense than getting a whole new furnace as the heating company was pushing for.

I bought this as a replacement for the same unit that ran for 19 years problem free. Slight changes to the installation from the older unit that I didnt feel comfortable doing on my own this time so I had someone come to do the installation.

Great value!

Looks great but larger than indicated so will not physically fit in available spot. Has to be installed horizontally not vertically which was not indicated. Amazon has a new policy that anything over three hundred has to be inspected and refund will take thirty days from receipt. Will not be ordering anything over three hundred in future as all my returns are in original packaging, as shipped to me, so my account is spotless. I'm not impressed.