Medify MA-40
$$ Mid-rangeTrending Down$249.99
tldr; The allergy crusher. H13 HEPA + carbon, 840 sq ft, CARB certified. Great for pet owners.
$249.99 on AmazonSentiment Breakdown
56%Positive
Positive
56%Neutral
36%Negative
8%Based on 80 Reddit opinions
Strengths & Weaknesses
Each axis shows what % of Reddit comments are positive about that topic. Higher = more praise.
Key Features
- MAXIMUM COVERAGE: Cleans large spaces up to 5,948 sq ft in one hour, 2,974 sq ft in 30 minutes (CADR 1009). Ideal for homes, apartments, bedrooms, living rooms, offices, schools, universities, classrooms, hospitals, restaurants, and other businesses.
- TRUE HEPA H13 FILTRATION: Medify Air’s HEPA filter material tested to remove 99.9% of particles from O.3 to 0.1 µm by Intertek Laboratories, including allergens, odors, VOCs, smoke, pollen, pet dander, dust, smog, contaminants, and more down to 0.1 microns in size. Captures finer particles than HEPA H11 (0.3 microns).
- ULTRA QUIET: Choose from 4 fan speeds, with the lowest setting operating virtually silent. Runs at 110 Volts at a maximum noise level of 70 dB. For the most discreet operation, enable sleep mode to completely dim the unit's panel lights.
- EASY TO USE FEATURES: Includes a sleek touch panel with 0-8 hour timer, fan speed, optional ionizer, dust sensor, sleep mode, filter replacement indicator, auto mode, PM2.5 pollution indicator, and child lock, great for both kids and pets.
- QUALITY TESTED & BACKED: CARB, ETL, and Energy Star certified. Backed by a USA registered Lifetime Warranty. The replacement filter (B07MTQKJ14) lasts 3,000 hours or about 6 months.
- 🐾 Great for pet dander
- 📏 840 sq ft coverage
- 🌬️ H13 HEPA + carbon
Sentiment Over Time
Historical Price Data
Medify MA-40
Medify MA-40
All-time low: $125(2023-05)
What Redditors Actually Say
What Redditors Say
Best praise vs top criticism for Medify MA-40
Best Praise
+7 pts“We recently moved into a new house and my allergies have been out of control. I got this air purifier (Medify) and its been night and day difference. We also have cats and cat liter and its helped signiicantly with that smell as well.”
r/AirPurifiers
ViewTop Criticism
+3 pts“I’m having an extremely similar issue with my Medify MA-40. I’ve had it for 2 days and the smell in the room is super strong and I feel pretty lousy, however I don’t have the ionizer on at all. Thinking I’m going to need to return it for something else because this is unacceptable”
r/AirPurifiers
View13 more quotes available below
Related Products
Frequently Asked Questions
Is the Medify MA-40 worth buying?
The allergy crusher. H13 HEPA + carbon, 840 sq ft, CARB certified. Great for pet owners.
What do Redditors love about the Medify MA-40?
Redditors highlight: 🐾 Great for pet dander. 📏 840 sq ft coverage. 🌬️ H13 HEPA + carbon.
What are the downsides of the Medify MA-40?
Some criticisms include: "I’m having an extremely similar issue with my Medify MA-40. I’ve had it for 2 days and the smell in the room is super strong and I feel pretty lousy, however I don’t have the ionizer on at all."
How accurate are these ratings?
Our sentiment analysis is approximately 80-85% accurate compared to manual review. Products with more mentions (Medify MA-40 has 80) tend to have more reliable scores.
80 Reddit opinions analyzed • Last updated 4/16/2026