Replacement MERV‑10 Filters 3‑Pack

for WatchDog NXT120/NXT120C models

Watchdog MERV - 10 NXT120 NXT120C Dehumidifier Replacement Filters | 3 - Pack - Pure n Natural Systems
Replacement MERV‑10 Filters 3‑Pack - Pure n Natural Systems
Replacement MERV‑10 Filters 3‑Pack - Pure n Natural Systems

Replacement MERV‑10 Filters 3‑Pack

for WatchDog NXT120/NXT120C models

$120.00

Usually ships in 5 days; up to 10 for some models

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About this product

Keep your WatchDog NXT120 or NXT120C performing at its best. This 3-pack of genuine MERV-10 replacement filters removes dust and dirt, fits perfectly, and is ready to install.

Maintain peak performance and indoor air quality with this 3-pack of genuine MERV-10 filters designed for the WatchDog NXT120 and NXT120C series dehumidifiers. These filters catch dust, dirt and particulates before they reach your equipment, helping extend life and efficiency. Designed for facility-managers, HVAC professionals, cigar lounges, schools, healthcare or commercial spaces where reliable moisture control matters.

For use in the following Watchdog NXT high-capacity dehumidifiers:

  • WatchDog NXT100C unit
  • WatchDog NXT120 - 120 Pint High Capacity Dehumidifier
  • WatchDog NXT120C - 120 Pint High Capacity Dehumidifier with Condensate Pump

Best for

basements, crawl spaces, storage rooms, and whole‑home installs that need steady airflow and lower maintenance.

Specifications
Filter Rating

MERV 10
Compatible Models

WatchDog NXT120 & NXT120C (120-pint models)
Dimensions

~ 14.06″ x 13.78″ x 0.75″ (approx)
Pack Quantity

3 filters per pack
Media Type

Non-washable synthetic/pleated filter media
Recommended Change

Every 2-3 months under typical heavy load; inspect annually as baseline
Pre-Filter Required

Yes — this filter is installed behind pre-filter (optional washable)
Intended Use

Commercial / industrial dehumidification

Certifications

The filters themselves are consumable components and are not ETL-listed individually. ETL covers the entire appliance, not replacement filters. The WatchDog NXT120 dehumidifier itself is ETL Listed (Intertek) for electrical safety.

What's in the box

3 × MERV-10 replacement filters (compatible with WatchDog NXT120 / NXT120C).

Installation tips
  1. Turn off the dehumidifier and disconnect power before removing filters.
  2. Remove the front service panel or filter access door on the NXT120/NXT120C.
  3. Remove the existing MERV-10 filter (discard properly).
  4. Inspect and clean the washable pre-filter (if equipped) — ensures optimal performance of the new filter media.
  5. Install the new filter with the airflow arrow pointing in the correct direction (toward the unit’s coil).
  6. Replace the service panel; restore power and resume operation.
  7. Note the installation date in your maintenance log; replace every 2-3 months (or sooner if heavy dust loading).
  8. In environments with heavy dust/particulate loads (construction, remediation, cigar lounges), inspect monthly for loading and consider more frequent changes.
  9. Maintain a stock of filters on-site (this 3-pack supports change-out of one unit for a full year in many cases).
  10. Communicate to facility users that the filter should not be washed or reused—disposable media only.

Frequently asked questions

How often should I replace these?
Recommends every 2–3 months for active basements/crawl spaces. Seaira also advises to inspect at least annually and replace as needed based on dust load.

Are these washable?
No. Replace the MERV‑10 when it looks loaded or airflow drops. Use the washable N‑1200 pre‑filter to catch larger dust, and extend life.

Do they fit the NXT‑60 or NXT‑85?
No. Those models use N‑201 filters at 12″ × 10″ × 0.75″.

Does this pack fit the NXT100C?
N‑1201 specifically for NXT120/NXT120C. 
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