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n Easy to use. n No special equipment required. Cons n Must be kept in original or marked container. n Potential allergic reactions for users and occupants. n Some degreasers may be harmful to skin or if inhaled. n Possible chemical sensitivity for users and occupants. n Possible offensive odor during use. n Containment of overspray. EPA classification Degreasers are not required to be registered by the EPA. Best Practices n Always use and wear personal protective equipment. n Follow manufacturer's instructions and safety precautions. n Use in well-ventilated area. n Keep in original or properly marked container. Deodorizers Product definition Deodorizers remove or mask unwanted odors inside an HVAC system or building. Four types of deodorizers are common: n Receptor blockers block scent receptors in the nose from detecting certain odors. n Oxidizers chemically combine with (oxidize) sources of odors on surfaces. n Air sanitizers inactivate odor-causing microorganisms. n Masking chemicals overwhelm an odor with another scent. Typical uses Remediating odors from fire smoke damage, tobacco smoke damage, dead animals, water damage, and mold and mildew. Application methods Deodorizers may be sprayed or they may be placed, as liquids or solids, in a location that allows them to evaporate slowly into the building space. Pros n Easy to apply. n Reduces or eliminates odors. Cons n May mask but not remove odor. n Building occupants may have objections to the use of chemicals or scents in the product. n Occasionally people report asthma attacks, allergic response, headaches, breathing difficulties, or other health problems when exposed to air fresheners or deodorizers. EPA Requirements Any deodorizers for which pesticidal claims are made, such as sanitizers that inactivate odor-causing microorganisms, must be registered with the EPA. Best practices n When using a scented product, ensure the occupants have no objection to the product before applying. n Remove the source of odors whenever possible. n Avoid using masking deodorizers if possible since this is only a temporary remedy. n Follow manufacturer's instructions for safety of occupants and workers. n For EPA-registered pesticides, use in compliance with the EPA-accepted label. References EPA Pesticide Registration Manual: Chapter 4 - Additional Considerations for Antimicrobial Products: http://www.epa.gov/ pesticides/bluebook/chapter4.html Seymour S. Block, Disinfection, Sterilization and Preservation, 5th edition, 2001. ASHRAE/ACCA/ANSI 180 - Standard Practice for Inspection and Maintenance of Commercial Building HVAC Systems (American Society of Heating, Refrigeration, and Air- Conditioning Engineers, Air Conditioning Contractors of America, and American National Standards Institute) NADCA ACR - Assessment, Cleaning & Restoration of HVAC Systems IICRC S520 - Standard and Reference Guide for Professional Mold Remediation (Institute of Inspection, Cleaning and Restoration Certification) OSHA: MSDS Sheets on the work site: Standard 1910.1200: http://www.osha.gov/pls/oshaweb/owadisp.show_ document?p_table=standards&p_id=10099 National Institute for Occupational Safety and Health (NIOSH) Pocket Guide to Chemical Hazards: http://www.cdc. gov/niosh/npg