This is not about snug bell-bottoms. Retrofit is a term that refers to taking an existing structure, fixture, automobile, or other piece of equipment and making it better. In eco-friendly terms, a building can be retrofitted to work on solar power, a lamp to use energy-efficient bulbs, and a car to have a more efficient emissions system.
Looking for the perfect climate? You could hightail it to San Diego, or you could get it in your own home, anytime, with HVAC. It's what makes your inside air cozy in winter, cool in summer and fresh all the time. More technically, these are the mechanisms that regulate temperature and airflow in a building. HVAC consumes the greatest portion of energy in most buildings, and how well it does its job has a direct impact on a home's energy efficiency and indoor air quality. To pronounce it like a pro, just sound out each letter, H-V-A-C.
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