Working in covid icu 3-4 days a week (36-48 hours), i would like to know how frequent the filters are to be changed?

Mickey, Thanks for your question. Please read the full reply as there is important information throughout. If only considering breathing quality, a weekly change out would normally be fine. This is because filters over time "load" up with particulates (not just Covid, but anything) which in turn generates back pressure that causes breathing to feel labored. This process can take days (or even weeks) depending on how much the filter is used and the environment. However, because of the intensive exposure to surface contaminates in an ICU ward, which will coat the exterior surfaces of the mask and filter, I strongly recommend modifying the above schedule to replace the filter whenever the mask itself is cleaned and sterilized. In any case, do _not_ wash the filter. It's electrostatically charged to filter aerosolized particulates like Covid-19 and washing neutralizes that charge.

I use this in my Oura mask - how many hours before changing?

About a week, assuming 1-3 hours a day of regular daily use. Like all N95 filters, these are electrically charged. That charge begins to dissipate when the filters are regularly exposed to air (and moisture in the air).

Will this fit into the oura air mask?

Yes, I use these in all of mine and my kiddos Oura masks

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North by Honeywell 7506N95 Particulate Filters, Cartridge/Filter, Non-Oil Particulates, N95, Purple (Pack of 10) | Cartridge/Filter, Non-Oil Particulates, N95

North by Honeywell 7506N95 Particulate Filters, Cartridge/Filter, Non-Oil Particulates, N95, Purple (Pack of 10) | Cartridge/Filter, Non-Oil Particulates, N95

Product ID: 400057673

Details

Brand
Honeywell
Colour
Purple
Material
Polypropylene
Model Name
N95
Size
One Size

🎯Low-profile curved design

🔄Easy user seal checks

🛡️N95 filtration efficiency

€ 98.80

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Description

🛡️ Stay ahead of airborne risks with sleek, reliable N95 defense!

MADE IN USA QUALITY - Durable polypropylene construction with trusted Honeywell reliability
SEAMLESS SEAL CHECKS - Quick and reliable user seal verification every time
BULK PACK CONVENIENCE - 10 filters per pack to keep you stocked and ready
TRUSTED N 95 PROTECTION - Blocks 95% of non-oil particulates for workplace safety
STREAMLINED LOW PROFILE FIT - Curved top design avoids snags on pipes and gear

North by Honeywell 7506N95 filters deliver certified N95 particulate protection with a user-friendly seal check system and a low-profile curved design that prevents snagging. Packaged in a convenient 10-count set, these purple polypropylene filters are made in the USA and trusted by professionals for consistent workplace safety.

Specifications

ASIN	B00Z2RAUC4
Brand	Honeywell
Colour	Purple
Country of Origin	USA
Customer Reviews	4.7 out of 5 stars 307 Reviews
Included Components	Cartridge Respirator Parts & Accessories (10)
Item Dimensions	7.6 x 7.6 x 7.6 Centimeters
Item Weight	0.01 Pounds
Item dimensions L x W x H	7.6 x 7.6 x 7.6 Centimeters
Manufacturer	North by Honeywell
Manufacturer Part Number	7506N95
Material	Polypropylene (PP)
Model Name	N95
Model number	068-7506N95
Number of Layers	1
Size	One Size
Unit Count	10.0 Count

Reviews

D**T

Great!

Perfect replacement filters that are no longer available locally

30.07.2025

S**Y

works fine

28.02.2025

S**.

Fits comfo respirator

What I needed. Fits comfo mask. Use to filter out resin while sanding 3d prints

27.12.2022

A**R

great product

work well

11.10.2024

T**T

Does the job

This product added a second layer of protection to my Honeywell face mask. I use it with an Organic Vapor cartridge while spraying pesticides in my yard and did a great job of keeping me safe.

6.08.2020

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€ 98.80

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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