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Air Formaldehyde (HCHO) DIY test kit - Know What's in the Air that Surrounds You (Pack of 3) auspowers_batchthree INFICON 705-600-G1 Filter Kit forAir Formaldehyde (HCHO) DIY test kit Know What's in the Air that Surrounds You (Pack of 3) Product Features Test Air Quality: Designed to help keep your family safe, our DIY kit determines if Formaldehyde Gas (HCHO) is in your home. Suitable for areas up to 270 square ft, use only one kit per room. To inspect the whole house, use one kit per room. Fast, Reliable Results: To test, just follow the 6 steps outlined in the included manual. Keep air