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Swirling smoke patterns isolated on black backdrop. Abstract smoke art with swirling and flowing lines, monochrome, curves and twists of white vapor captured in high contrast
Woman who's sitting on sofa under warm plaid in living room switches off her air conditioner on wall. Young girl adjusting modern AC system, regulating temperature and enjoying cool fresh air at home
Air conditioning wall mounted ventilation system on ceiling in the white hotel room. Hotel room air ventilation grill on the wall.
AC Airflow for Air Conditioner in black background

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Detail of radiator grill (part of central heating system)Image used under license from Freestock.com<a href="https://www.freestock.com/free-photos/detail-radiator-grill-part-central-heating-45845281">Image used under license from Freestock.com</a>
Air intake of jet engine - Detail of military jet on display at air showImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/air-intake-jet-engine-detail-military-31883287">Image used under license from Freestock.com</a>

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