WORKS GREAT IN AIRBNB AND HOME HVAC - I now have THREE
I purchased one of these as a test to see if I could brighten up the room smell in an Airbnb I operate in my home, which is popular and gets daily use.  I always try to leave a pleasant scent via cleaning, but wanted something a bit more sophisticated.  I saw a NYTimes article on scent marketing and started searching on Amazon for choices in an entry-level machine.  My Airbnb suite is just 300 square feet, but has its own HVAC system. I purchased a tea/citrus scent from Aromatech after trying out their various samples (available for order on Amazon).<br /><br />I've had the Kevinleo machine (sturdy and beautiful quality) set up and operating for about a month, and started with the lowest amount of scent spraying into the HVAC air return (which I installed by poking a hole in the HVAC return and setting up the machine in a bookcase in my my office, which is adjacent to the HVAC crawl space and Airbnb.  Learning the buttons on the keypad is not a big deal to figure out.  If you can the time on an alarm clock, you can set this scent machine operating times/hours/days. Lowest scent is 5 seconds on and 300 seconds off, which means it sprays scent for 5 seconds every 5 minutes.  I set it to spray only during daytime hours when guests would be awake, figuring no one wants to be subjected to a scent while they're sleeping. This setting has been PERFECT and is just right, so every once in a while, you get a pleasant whiff of the tea/citrus scent.  It isn't enough to really take notice that the place has a scent machine -- it's just a pleasant overall essence that's occasionally noticeable.  As it should be, I think. Too much of a good thing is just that.  I liked this machine so much that I bought another one for the bedroom level of my own house.  After trying it out and setting it to scent for 24 hours a day, I can tell you that you DO NOT want to be smelling scent when you're sleeping. Also, for the Airbnb I bought the somewhat expensive Aromatech scent ($149 for 500ml or 16 oz= $9.31/oz).  I'm trying out the White Tea reed diffuser scented oil in the rest of the house, which is $13.99 for 8 oz = $1.75oz.  The less expensive oil works just as well and smells the same for less than a fifth of the cost of the other.  Back to the Airbnb scent machine == it's been operating from 7 am to 10 pm since June 15, and scenting for 10 seconds on/300 seconds off, and when i check the oil bottle in the machine, it still looks nearly full.  It appears I'll be able to go many months without having to refill.  On a note to those who say "the machine doesn't work after a while," I HAVE occasionally set the scent output to a higher number of seconds -- like 20 on, 300 off -- just to make sure the machine occasionally is working long enough to ensure the tube from machine to hvac has some air pushed through it and avoids possible accumulation.  Just a thought.  I'm liking this all so much, I just bought a THIRD machine for the living room level of my home, and will stick to the less expensive white tea reed diffuser scent oil refill tea (the Westin Hotel-ish smell) as my scent.  I hope this helps someone make their own decisions. Eric in LA
Rating: 5 stars