Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: When you first turned on your air purifier did you notice a strong unpleasant smell?
Document: This machine works extremely well for people sensitive to air particles and Allergy help sites rate as 99% purifier versus down to 70% for other well known brands. Washable filter units may be OK for other uses but can't do the job of this machine. You will notice furniture actually is not even dusty any more. Crack a window for tightly built windows to bring in fresh air or room will get Dry.
I have had my Alen Paralda Dual Airflow Air Purifier for two weeks roughly now and thus far, works great. I'm noticing a definite difference in my bedroom, which I bought it for. I typically keep it on low during the day but when I go to bed at night, I turn it up to the third level and I notice a definite difference in the quality of the air in my bedroom. It does have a whirring noise but I like it as I tend to sleep to it better.
At the recommendation of my sister, who has bought the Paralda first - we purchased the air purifier for our home. My mother suffers from asthma and terrible allergies and lives with us - so anything we can do to make her more comfortable is worth it.The Paralda is long and slender yet compact - it easily fit in our living room and didn't stick out like a sore thumb. It is very quiet and has varying speeds.
I have been so pleased with this air purifier, especially the fact that the company provides replacement filters for free.
Bought for my daughters room because she has respiratory problems. I can't tell if it helps her, but I feel better having it. Seems to be a good quality air purifier.
Got this purifier to reduce cat dander,  air seems much cleaner, purifier is tall doesn't take up too much room and the light green color seems to blend with furniture in the room
I noticed the air seemed fresher and there was less dust on the furniture. It felt like the pristine air you usually find in the dentist office - fresh, cleaner, very comfortable. The Paralda is not noisy at all compared to our Ionic Breeze air purifier we used to keep in my mother's bedroom.
The description for Alen Paralda Hepa Air Purifier is misleading. It certainly is not quiet. Even on the lowest setting, there is a fan noise- shrilling  SSSHHHHHHHSSSss noise.... This is NOT suitable for a bedroom, or even the living room, if you want to rest. Unless you have poor hearing, it is anoying, and disturbs your sleep.Now I realize how spoiled I've been with old my Sharper Image's Ionic Breeze, totally silent, and lasted ten years.
This is the best purifier by far that I have ever used. I had the alen 3500 before, and  that was fine but I like that this one is so narrow and that it's antimicrobial as well.
I LOVE this product. It looks fantastic and works even better then that. You can actually feel the difference of the air quality in the room. Plus it's very easy to understand how to operate it. It even has a lovely night light. Everyone should have one of these!
Answer: No not that I remember.  Could have maybe been some sterilizer left over from manufacturing?   Hopefully one time event.