Quest MERV 13 Filter 20in X 22in X 2in for Quest 335, and 335, 277V

MERV 13 Filter Sized for the Quest 335 Dehumidifier

The Quest 335's higher airflow rating calls for a larger filter surface area than compact units use, and this MERV 13 replacement measures 20 x 22 x 2 inches to match that larger footprint. Routine replacement keeps filtration performance and airflow consistent across both voltage versions of this unit.

It's a direct fit for the Quest 335 (PN 4042500) and the Quest 335 277V (PN 4042600), so one filter covers either voltage configuration.

Key Features & Benefits

• Higher-Efficiency Filtration — MERV 13 captures more airborne particulate than standard grades.
• 20 x 22 x 2 Inch Size — matches the Quest 335's larger filter footprint.
• Fits Both Voltage Versions — covers the 208/230V and 277V Quest 335 units.
• Scheduled Replacement Part — plan to keep a spare in inventory.

Who Should Use the Quest 335 MERV 13 Filter

Owners of the Quest 335 or Quest 335 277V dehumidifier who need a routine replacement filter sized 20 x 22 x 2 inches.

About Quest

Quest is a Madison, Wisconsin dehumidifier brand owned by Therma-Stor LLC, the manufacturer behind the related Anden line as well. Overhead and portable Quest units rely on patented M-CoRR multi-coil technology to recycle heat pulled from the air during dehumidification, built for commercial and industrial moisture control in cultivation, food production, and similarly demanding environments.

Frequently Asked Questions

Which Quest 335 versions does this fit?

It fits both the 208/230V Quest 335 (PN 4042500) and the 277V Quest 335 (PN 4042600). The filter size is identical across both voltage configurations.

What size is this filter?

It measures 20 x 22 x 2 inches, sized for the Quest 335's larger airflow rating compared to smaller Quest units. Double-check the dimensions against your unit before ordering.

How often should it be replaced?

Replace it once airflow noticeably drops or the filter media looks visibly loaded with dust. Facilities with heavier particulate loads may need to check it more often than the standard schedule.

Is MERV 13 a significant upgrade?

Yes, MERV 13 captures finer airborne particulate, including smaller dust and mold spores, than lower filtration grades. That comes with a modest increase in airflow resistance that the Quest 335's fan is sized to handle.