AROMADD 3500 Sq Ft Smart Scent Diffuser - HVAC System

A year later and my machine is working amazing I couldn’t love it more. I’m in Canada FYI. Much cheaper than buying from Aroma 360 and same result. Also Cindy was fantastic answering all of my questions and needs. The customer service is top tier. Thanks again Cindy;)

Works perfectly and my entire house smells great

UPDATE: Aromadd reached out to me regarding my initial review and offered to replace my unit with a new one. I installed it a few days ago and everything is working great again. It won't get as much use right now in October as my HVAC won't be running as much - so I won't know for sure if it holds up to months of use for a while - but so far, it's working perfectly. Very impressed with their customer service!! I purchased this in May 2026 in advance of a cross-country move this summer. Installed it in July 2026 and for two weeks, it was amazing. Easy to install; the scent was great and really filled my entire 3k sq ft home. After two weeks, the scents started diminishing. I used to just use the Glade Plug-It-Ins in each room and knew that you could just "get used to it" but as someone who travels frequently for work, it was clear it was just failing. I'd be gone for a week at a time, come home, and nothing. It still makes the pump noise like it's working. I've tried cleaning and clearing the lines. I've tried using an entirely new tube and done every troubleshooting I could find online. At the end of the day, nothing works, and this thing had a working life of around 2-2.5 weeks for me. Absolute waste.

I did a good bit of research to find the best diffuser for HVAC connection. I waited a while to write this review after my purchase. A few things to mention. Customer service with this company is fantastic. I emailed them to request a few extra fragrance bottles (I do not like the idea of cross contaminating the oils.) Bella was super helpful in providing a link to place the order, and even sent one free of charge. It takes a bit of a learning curve to set the schedule, either on the machine or in the app. Once you figure out how everything works, it’s not difficult, it just takes some trial and error. I have my system set to diffuse 6 seconds and pause 180 seconds only on the weekends around noon as a treat. I set a 12:00 am start/11:59 pm end schedule for each day of the week, so I can always toggle the unit to turn on outside of my weekend schedule. That is working out good for me. I decided to stick with Aromify and Aroma Retail oils after spending a small fortune buying/sampling from every essential oil company in existence lol. Sample and choose what you like. (HVAC Connection) Don’t worry too much about the system diffusing here and there when the A/C is not running. I scheduled my diffuser to run at a time of day, when my HVAC fan is most likely to be running more often. A few times of diffusing here and there when the fan is not running should not hurt anything. If you plan on connecting this to your HVAC system, consider having a outlet installed near the hookup location if you don’t already have one. I ran my outlet myself. These units really seem to shine more when the fragrance is diluted with the air from your HVAC system, vs spraying in one location of your home. I hope this helps. Edit: I did not like the diffuser spraying when my AC fan was not blowing. We ended up having a strong concentrated smell around our air handler when that happened. My solution….I bought the air switch accessory from Aroma Retail (intended for their professional machine,) and wired it up in the place of my machine on/off switch. I neatly covered the hole where the switch was, with some velcro (put a small slit in it to allow the wires to pass through.) The red wire on the air switch should be connected to the red wire on the machine switch, and the black wire on the air switch connects to the white wire on the machine switch. I used heat shrink solder connectors, to make my wire connections. The black wire on the air switch should be on the labeled common screw hole, and the red needs to be moved to the labeled normally open screw hole. I opened my Aromadd machine and removed the small speaker responsible for the multiple beeps every time it turns on (take some small pliers and just twist it off. You can see it after opening the machine, on the circuit board, under the power on/off switch.) Having the air switch connected will turn the machine off and on depending on it detecting air pressure from your HVAC system (the tube on mine is connected to the duct after the A/C handler…same as the diffusing tube, and connects to the air switch high pressure opening.) The beeping every time the unit turned back on was driving me crazy. My Aromadd is connected via WiFi, so no settings are lost from the machine turning off and back on. I have included a photo of my current setup. In my opinion it is not worth paying $799 for Aroma Retails professional machine (plus $49.95 for their air switch,) when you can simply add their air switch to this machine. Keep in mind, modifying this machine will void the manufacturer warranty. Just FYI, the Aroma Retail air switch is manufactured by Cleveland Controls..Model RFS-4150. Do this modification at your own risk. I hope to have helped anyone who doesn’t want this type of machine spreading oil when the HVAC fan is off. Aromadd if you are reading this, make a updated unit with a air switch connection. More of these units should have that option. Edit: Understand something about these diffuser systems and the use of aromatic oils. Most HVAC installers do not agree with scenting your home this way. Why….because it’s not the best idea to have oils (with a lingering smell,) dispersing on everything in your home, and throughout your ductwork. Use this in moderation, if at all. I really like the idea of this after experiencing something similar in Vegas, however, I also understand all the negatives. That is one reason I have my system set up to disperse very little…only on weekends/small amounts over a extended time interval….and just know, you will smell a bit of a residual oil smell when your A/C system fan first turns on when not scenting. This is because the essential oil is to some extent landing inside the ductwork/landing on everything in the house, and landing on your return filter as air cycles in your home. Do your research before installing this! If you still like it, great. If the negatives outweigh the positives, don’t buy the diffuser at all. HVAC connection or not, the negatives remain. I am choosing to keep the unit running on what I feel is toned down. I hope this helps. Edit: Run 99% Isopropyl Alcohol in your bottles and let it disperse for about 20 minutes or so from time to time to help keep the diffuser (hopefully the ductwork) clean/sanitized.

I purchased the Aromadd Smart Scent Diffuser nearly two years ago and have been happy with it. About a month ago, the unit started rattling and making unusual noises whenever the pump kicked on. I submitted a warranty request and was pleasantly surprised by how quickly the team responded. After a few email exchanges, my warranty was approved, and I received a replacement unit about a week later. Throughout the entire process, Bella provided excellent customer service. She was responsive, helpful, and made the experience easy and hassle-free. It’s one thing for a company to sell a great product, but it’s another to stand behind it when something goes wrong. Aromadd absolutely delivered on that front! I’m very impressed with the warranty process, the customer service, and the company’s commitment to its customers. I’ll gladly recommend Aromadd to anyone looking for a smart scent diffuser. It’s great to know that when you invest in their product, they stand behind it! Five stars for the product, the warranty support, and especially Bella! I purchased the Aromadd Smart Scent Diffuser nearly two years ago and have been happy with it. About a month ago, the unit started rattling and making unusual noises whenever the pump kicked on. I submitted a warranty request and was pleasantly surprised by how quickly the team responded.