Surround Air Multi-Tech 8400 (MT-8400)

Surround Air MT-8400 Quick Review

The cheaper version to MT-8500, Surround Air Multi-Tech 8400 (MT-8400) air purifier is a slight downgrade with 5-stage purification rather than 6. Sharing similar engineering and design, MT-8400 offers identical air flow delivery rate, coverage, noise level and power consumption as the higher range model. Here comes the million dollar question, how versatile is Surround Air MT-8400 and what other features it would have it give in for the lower price tag? Hit on the link below to explore more about the air purifier.
± 139 p
     Annual filter ^    
± 34 - 48 p
Online price*
Latest Amazon price

Surround Air MT-8400 Specification

ProductSurround Air MT-8400
16 x 12.8 x 6.4 in
(40.6 x 32.5 x 16.3 cm)
Weight9.25 lb (4.2 kg)
Coverage (up to)400 sq. ft. (37 m2)
Dust free (CADR)
Pollen free (CADR)
Smoke free (CADR)
Airflow speed135 - cfm (229 - 0 m3/h)
- Lifespan
- Replacement cost ($)
Pre filter
HEPA filter
- Lifespan
- Replacement cost ($)
HEPA filter
1 year
Carbon filter
- Lifespan
- Replacement cost ($)
Activated carbon filter
1 year
Ionizer/ Technologies
UV-light/ PCO
Germicidal UV lamp
3.5 years
Other filter
Photocatalytic oxidation filter
All-in-one filter
- Lifespan
- Replacement cost ($)
Multi-Tech 8400 Spare Filter
1 year+- 29
Multi-Tech 8400 Spare Filter + UV Lamp
1 year+- 48
Optional/ Addon
Noise level30 - 50 dB
Power consumption55 W
Timer/ Scheduler2, 4 8 hours
SensorsAdvanced Sensor Technology
More color options
Auto mode
Air qualityAQ indicator
Filter change indicator
Wi-Fi/ BTBluetooth
Remote control
Child lock
Warranty3 years
Email/ Phone support

Product image

Surround Air MT-8400 key features

  • 5-stage advanced purification technologies
  • Cleanable pre-filter
  • True, cleanable HEPA filter
  • Activated Carbon Filter
  • Germicidal UV lamp, Ionizer and Photocatalyst Oxidation Filter
  • 3 fan speed with Auto mode
  • 3 pre-set timer
  • 3 years warranty

Surround Air MT-8400 review

  • The pricing is so cheap for a 5-stage filtration that it makes other entry-level air purifier feels expensive.
  • Very, very low annual filter replacement cost.
  • True HEPA filter made from ultra-fibrous and ultra-absorbent material.
  • Both pre-filter and HEPA filter is cleanable from dust.
  • Up to 3.5 years lifespan for Germicidal UV lamp .
  • Permanent Photocatalytic oxidation filter that helps reduce strong chemicals, bacteria and odors.
  • Practical features including Auto mode, timer and filter-change sensor.
  • Up to 3 years official warranty.
  • Pricing is rather close to MT-8500 that offers 1 additional filtration with wide purifying coverage.
  • Like MT-8500, airflow delivery rate does not tally with the purification radius.
  • No air quality light indicator despite having the necessarily sensor technology.
Surround Air MT-8400 dimension
16 x 12.8 x 6.4 in
(40.6 x 32.5 x 16.3 cm)
Surround Air MT-8400 weight
9.25 lb (4.2 kg)

If you like the MT-8500, Surround Air Multi-Tech 8400 (MT-8400) is basically the same with identical design elements. A significant improvement over its predecessor models, Surround Air Multi-Tech 8400 (MT-8400) plainness design is welcome with small round corners on every edges. Additionally, fitting on controls that are seamlessly attached that allow responsive adjustment. Surround Air Multi-Tech 8400 (MT-8400) take up little room space and is well constructed with good reliability (3 years warranty comes standard).

Airflow capability and purifying coverage

Other than the affordable pricing, this is the main reason why Surround Air Multi-Tech 8400 (MT-8400) shines. Perfect for average sized to full scale space, the air purifier comes with 5-stage filtration including pre-filter, HEPA filter (both cleanable), activated carbon filter, Germicidal UV lamp, Photocatalytic oxidation filter and ionizer. While the airflow delivery rate is not great, in most cases, Surround Air Multi-Tech 8400 (MT-8400) is ideal in areas such as living room, kitchen or studio apartment.

Proceeding with the purifying performance, Surround Air Multi-Tech 8400 (MT-8400) is able of taking out plenty of pollutants and irritants within in its purifying range. Dust, dust mite, mildew, pollen, pet dander and mold within its purifying radius would not stand a chance with the air purifier 5-stage purification technologies.

Noise level and power consumption

Surround Air Multi-Tech 8400 (MT-8400) noise level is considerably suppress to a minimum tier all simply because of the nicely covered body platform. Hardly any noise at min fan speed dissimilar to the loud sound at third speed. Surround Air Multi-Tech 8400 (MT-8400) produce noise level that is quite parallel to MT-8500.As for electricity usage, Surround Air Multi-Tech 8400 (MT-8400) is reasonable for a complete 5-stage air purifier. Barely any electricity usage at minimum fanspeed while electricity consumption is still fine at maximum fanspeed. Surround Air Multi-Tech 8400 (MT-8400) electricity consumption compare to other household appliances is pretty respectable.

noise graph

Final thoughts on Surround Air Multi-Tech 8400 (MT-8400)

In short, Surround Air Multi-Tech 8400 (MT-8400) is what an amazing 5-stage air purifier should be. Compare with the entire list of advantages vs disadvantages, you will enjoy more on the benefits without compromising much on the downfalls. Adding the affordable price and maintenance cost into the bag, Surround Air Multi-Tech 8400 (MT-8400) is a recommended product no doubt.

Covered against

Surround Air MT-8400 VS Dust



Surround Air MT-8400 VS Pollen



Surround Air MT-8400 VS Hair

Hair/ Pet hair


Surround Air MT-8400 VS Dust mite

Dust mites


Surround Air MT-8400 VS Mold/ Mildew

Mold/ Mildew


Surround Air MT-8400 VS Pet dander

Pet dander


Surround Air MT-8400 VS Virus/ Germ

Virus/ Germ


Surround Air MT-8400 VS Tobacco smoke

Tobacco smoke


Surround Air MT-8400 VS Chemical



Surround Air MT-8400 VS VOCs



Surround Air MT-8400 VS Smoke/ Gas

Smoke/ Gas


Surround Air MT-8400 VS Odor



Surround Air MT-8400 5-stage filtration is vastly efficient when pit against large and tiny pollutants, allergens, irritants, viruses and bacteria. Powered by immense airflow input/ output and wide purifying coverage, Surround Air MT-8400 combined filtration is terrific in eliminating dust, hair, pet hair, pet dander, dust mites, pollen, mold and mildew.  As for smokes and odors, Surround Air MT-8400 is also impressive in eliminating chemicals, odors, cooking smell, fire, VOCs, tobacco smokes, cigarette, vapor, radon and ammonia.

Verdicts and ratings

Build quality
Airflow delivery
Particle Filtration
Smoke Filtration
Surround Air Multi-Tech 8400 (MT-8400)

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