# Weatherization Installers and Technicians > Perform a variety of activities to weatherize homes and make them more energy efficient. Duties include repairing windows, insulating ducts, and performing heating, ventilating, and air-conditioning (HVAC) work. May perform energy audits and advise clients on energy conservation measures. - Code: 47-4099.03 (O*NET-SOC; SOC 2018 47-4099) - Family: [Construction & Extraction](https://foundation.org.ai/occupations#family-47), one of its 65 occupations - Tasks: 20 tasks (20 core) - Page: https://foundation.org.ai/occupations/47-4099.03 - JSON: https://foundation.org.ai/data/tasks/47-4099.03.json ## What the work is made of 1. Test combustible appliances, such as gas appliances. Core task · Task 21204 · Rated by 22 occupational experts, August 2020 2. Determine amount of air leakage in buildings, using a blower door machine. Core task · Task 21205 · Rated by 22 occupational experts, August 2020 3. Test and diagnose air flow systems, using furnace efficiency analysis equipment. Core task · Task 17789 · Rated by 23 occupational experts, August 2020 4. Install and seal air ducts, combustion air openings, or ventilation openings to improve heating and cooling efficiency. Core task · Task 17792 · Rated by 23 occupational experts, August 2020 5. Inspect buildings to identify required weatherization measures, including repair work, modification, or replacement. Core task · Task 17787 · Rated by 23 occupational experts, August 2020 6. Recommend weatherization techniques to clients in accordance with needs and applicable energy regulations, codes, policies, or statutes. Core task · Task 17788 · Rated by 23 occupational experts, August 2020 7. Apply insulation materials, such as loose, blanket, board, and foam insulation to attics, crawl spaces, basements, or walls. Core task · Task 17790 · Rated by 23 occupational experts, August 2020 8. Make minor repairs using basic hand or power tools and materials, such as glass, lumber, and drywall. Core task · Task 17794 · Rated by 23 occupational experts, August 2020 9. Prepare cost estimates or specifications for rehabilitation or weatherization services. Core task · Task 17796 · Rated by 22 occupational experts, August 2020 10. Contact residents or building owners to schedule appointments. Core task · Task 17801 · Rated by 23 occupational experts, August 2020 11. Wrap air ducts and water lines with insulating materials, such as duct wrap and pipe insulation. Core task · Task 17797 · Rated by 23 occupational experts, August 2020 12. Prepare and apply weather-stripping, glazing, caulking, or door sweeps to reduce energy losses. Core task · Task 17795 · Rated by 23 occupational experts, August 2020 13. Clean and maintain tools and equipment. Core task · Task 17800 · Rated by 23 occupational experts, August 2020 14. Apply spackling, compounding, or other materials to repair holes in walls. Core task · Task 17799 · Rated by 23 occupational experts, August 2020 15. Explain recommendations, policies, procedures, requirements, or other related information to residents or building owners. Core task · Task 17802 · Rated by 23 occupational experts, August 2020 16. Maintain activity logs, financial transaction logs, or other records of weatherization work performed. Core task · Task 17803 · Rated by 23 occupational experts, August 2020 17. Explain energy conservation measures, such as the use of low flow showerheads and energy-efficient lighting. Core task · Task 17791 · Rated by 23 occupational experts, August 2020 18. Prepare or assist in the preparation of bids, contracts, or written reports related to weatherization work. Core task · Task 17804 · Rated by 23 occupational experts, August 2020 19. Install storm windows or storm doors and verify proper fit. Core task · Task 17793 · Rated by 23 occupational experts, August 2020 20. Wrap water heaters with water heater blankets. Core task · Task 17798 · Rated by 23 occupational experts, August 2020 ## More in Construction & Extraction - [Boilermakers](https://foundation.org.ai/occupations/47-2011.00): 17 tasks - [Brickmasons and Blockmasons](https://foundation.org.ai/occupations/47-2021.00): 14 tasks - [Carpenters](https://foundation.org.ai/occupations/47-2031.00): 29 tasks - [Carpet Installers](https://foundation.org.ai/occupations/47-2041.00): 16 tasks - [Cement Masons and Concrete Finishers](https://foundation.org.ai/occupations/47-2051.00): 26 tasks - [Construction and Building Inspectors](https://foundation.org.ai/occupations/47-4011.00): 19 tasks - [Construction and Related Workers, All Other](https://foundation.org.ai/occupations/47-4099.00): no tasks listed - [Construction Laborers](https://foundation.org.ai/occupations/47-2061.00): 27 tasks - [Continuous Mining Machine Operators](https://foundation.org.ai/occupations/47-5041.00): 15 tasks - [Derrick Operators, Oil and Gas](https://foundation.org.ai/occupations/47-5011.00): 15 tasks - 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