Diffuser Comparison Charts

To learn more about the different types of diffusers, please click here.

Comparison Chart 1

Diffuser Style	Air Pump Power1	Oil Capacity	Noise Level2
Nebulizing Diffusers
Economy	2.13 PSI	1-5 ml	Moderate
Well & Jet	4.0 PSI	.5-15 ml	Moderate
Advanced	6.5 PSI	Up to 15 ml	Moderate
Ultrasonic Misting Diffusers
Classic Ultrasonic Diffuser	N/A	1 - 10+ drops	Very Low
Whisper Misting Diffuser	N/A	1 - 10+ drops	Nearly Silent
Evaporative Diffusers
FanFuser	N/A	2 drops-5 ml	Low
Battery Operated	N/A	10 drops-2 ml	Low
Personal Aromatherapy	N/A	5-15 drops	Low
Heat Diffusers
AutoScenter	N/A	5/8 dram (2.3 ml)	None
ScentBall	N/A	1 oz. (30 ml)	None

1. Air pump power is shown as average PSI (Pounds of presssure per Square Inch). Actual pump output may vary by ±.4 PSI.
2. Noise level is given as average decibel (dB) level recorded at a distance of 18 inches from the diffuser in a quiet room. Diffusers without a number rating were too quiet to be detected by the sound-level meter. By comparison, a small room air-conditioner runs at about 71 dB.

*N/A means that that feature is Not Applicable to that style of diffuser.

Comparison Chart 2

Diffuser Style	Air Saturation1	Directional Adjustment	Power-Level Adjustment
Nebulizing Diffusers
Economy	High	—	—
Well & Jet	High	Yes	Yes
Advanced	Very High	Yes	Yes
Ultrasonic Misting Diffusers
Classic Ultrasonic Diffuser	Moderate	Yes	5 Settings
Whisper Misting Diffuser	High	Yes	10 Settings
Evaporative Diffusers
FanFuser	Very High	—	2 settings
Battery Operated	Moderate	—	—
Personal Aromatherapy	Low	—	—
Heat Diffusers
AutoScenter	Low	—	—
ScentBall	Low	—	—

1. The air saturation rating measures how much oil a diffuser can put into the air in a set amount of time for therapeutic purposes. Typically, the higher the air saturation rating, the larger the area the diffuser will cover (the actual square footage a diffuser can cover will vary depending on airflow, height of ceiling, climate, and the oil being diffused). Diffusers with a "Very High" rating have a maximum oil output ability of between .75 and 1.3 ml per 15 minutes of use. (*Note: all diffusers we carry with a "Very High" rating have a power-level adjustment so you can control how much oil is actually diffused. The maximum output is for the diffusers on their highest settings.). Diffusers with a "High" rating have a maximum oil output ability of between .4 and .75 ml per 15 minutes of use. Diffusers with a "Moderate" rating have a maximum oil output ability of between .1 and .4 ml per 15 minutes of use. Diffusers with a "Low" rating have a maximum oil output ability of less than .1 ml per 15 minutes of use. These levels are for lemon oil diffused in a warm, dry climate with moderate air flow. Actual oil output ability may vary depending on the type of oil being diffused, the climate, airflow, and diffuser variability.