Cirrus Wind Indicator- HVAC Airflow and Draft Indicator, Power Bank - Safe and Portable - Trusted Alternative of HVAC Technicians

use this with my blower motor test. for indoor leak test. works great and I want to keep on moving around the house while using the blower door.

This thing is quite nifty. I've had issues with vapor intrusion and odors that I suspected was coming in from degraded window framing in my apartment but couldn't pin it down. With this I was able to blow a bunch of puffs around the corners and edges around the window and found some obvious airflows that I wouldn't have noticed otherwise. I like the overall design and that it uses an (apparently) solid cartridge instead of a liquid. Since you can hold it at any angle I was able to blow smoke from different directions at a suspected leak, like when I wanted to get a better idea of whether the smoke was moving because I just blew it in that direction, or whether a current was actually pushing it. The LED light was more useful than I thought. It helps see the smoke a bit better in many cases, so I just keep it on the whole time I'm using it. Sometimes it might help to have a separate very bright flashlight too though. The bellows system also lets you have a lot of control over how much smoke comes out. I found that it was best to not squeeze hard or fast, but rather gently. If you squeeze it too fast, the smoke obviously comes out faster, which also causes extra turbulence so it's harder to see any subtle airflows. Also squeezing really fast makes the smoke come out more "diluted" so it's harder to see it anyway. With short gentle puffs and you get thicker streams of smoke which are easier to follow and actually last a lot longer. The cartridge seems to last a good while. I wasn't keeping track but I'd guess I have at least made a couple hundred puffs and it shows no sign of slowing down. The description says around 1000 pufs so I'd believe it. I will say the volume of smoke isn't huge, its not like a fog machine or anything. So if you need to find a leak over a really large area there might better options. This is probably best where you have a bunch of specific spots you want to check, at least for my use case.

This was great for showing a customer leaking return ductwork! Worked perfect!

Edit: I've stared at this useless tool in my box for years now. It does work great. But the cartridges dry out super fast. I didn't have that many uses on the tool and the cartridge in it and my spare both didn't work. (I kept the plastic cap on both) They cost too much to be useless... Original review: Purchased for commercial use. Great product, easy to use. Shows airflow well. I also use it to test fire alarms,( as long as there is no direct breeze). Caring company cares deeply about their product and service.

Nice little gadget. The light is a nice feature. I wish it would be put out more smoke, but is still does a pretty good job.

This is a fantastic little unit! Plenty of smoke to make it easy to detect draft flow. All sorts of little extras make this unit more than worth the money!

I do refrigeration and got this to check for air curtains interruption in a case. It’s not a lot of smoke but enough to see what I need to see. More than I thought it would do honestly. It’s really easy to use and a lot less obnoxious the a smokie. It does small puffs, not a constant stream but it’s pretty thick smoke

I’ve been using this smoke pencil tool for chimney and HVAC inspections. The smoke output is clean and easy to see, which makes checking draft pressure, air movement, and leak detection much easier during inspections. The built-in LED light is useful when working in darker mechanical rooms or basements.bI also like that it’s rechargeable. Great for checking fireplace drafts, duct leaks, negative pressure issues, and airflow around appliances.

Works well