Alen BreatheSmart 75i review

The BreatheSmart 75i is Alen's most powerful purifier and the right choice when one unit has to handle a very large bedroom, a loft or an open-plan space. Alen rates it for 1,400 to 2,800 square feet, and publishes noise at 25 dBa on the lowest speed and 51 dBa on the highest, across five speeds. Smart RFID filters track remaining filter life, and the Alen Air app handles schedules and remote control. The Essential (Pure) filter is rated for 12 to 15 months of 24/7 use and costs $99. Alen backs it with a lifetime warranty, but only with product registration and an active filter subscription, and it offers a 60-day trial with free 2-day shipping. The unit weighs 27 lb, so it is not one to carry between rooms. At $799, it is overkill for a standard bedroom, where the Coway or Blueair cost far less.

Who it is for

Very large bedrooms, lofts and open plans where one quiet unit has to cover a lot of space.

Price

$799 on the Alen US store when checked.

BreatheSmart 75i Regular price $799.00 Sale price $799.00
Quoted from the vendor pricing page on November 8, 2026.

Key features

• True HEPA filter that Alen says removes 99.9% of particles over 0.1 micron
• Published noise level of 25 dBa on low and 51 dBa on high
• Rated for 1,400 to 2,800 square feet
• Smart RFID filters that track remaining filter life
• SleepScore validated and Energy Star 2025 Most Efficient

Strengths and weaknesses

• Strength: Covers the largest space on this list
• Strength: Lifetime warranty with registration and an active filter subscription
• Strength: 60-day trial and free 2-day shipping
• Weakness: $799 before filters
• Weakness: 27 lb body is heavy to move between rooms
• Weakness: Lifetime warranty depends on keeping a filter subscription

Key facts

• Price: $799
• Noise level: 25 to 51 dBa
• Coverage: 1,400 to 2,800 sq ft
• Filter life: Essential (Pure) 12 to 15 months
• Weight: 27 lb

Where it ranks

Alen BreatheSmart 75i is No. 8 in our Best Quiet Air Purifiers verdict.