Types of Diffusers
Reed diffusers pull oil up through natural or synthetic stems and evaporate slowly for days. Ultrasonic diffusers use a vibrating plate and water to create a cool mist that scents for hours. HVAC or cold-air systems circulate oil through a building. Each type suits a different space and load, so match the diffuser to the room size.
Best Oils for Diffusing
For a 100% natural experience, use pure, undiluted oils in a carrier. A strong, long-lasting scent comes from base-heavy oils: woods, ambers, and musks. For ultrasonic, add one to three drops per full tank of water; for reeds, the whole bottle is the reservoir. Rotate the reeds weekly to refresh the scent.
How Much to Load
Reed: fill the vessel and insert six to ten stems, rotating weekly. Ultrasonic: one to three drops per tank of water. HVAC: follow the system's rated load, typically a small, controlled amount. Too much oil in an ultrasonic makes the scent cloying and can damage the plate, so start low.
Frequently Asked Questions
What is a diffuser oil?
A diffuser oil is a fragrance concentrate designed to scent a space slowly, used in reed, ultrasonic, or HVAC systems rather than on the skin.
How much diffuser oil do I add to water?
Use one to three drops of oil per full tank of water in an ultrasonic diffuser. More makes it overpowering and can harm the plate.
Which oils last longest in a reed diffuser?
Base-heavy, low-volatility oils such as woods, ambers, and musks last the longest in reed diffusers, often for weeks.