Credits

Image attribution

Photography on this site is used under Creative Commons licenses. Attribution is required by those licenses and is given here.

Image	Creator	License	Source
Boiler Room One	joemacjr	CC BY 2.0	View
Pueblo Chemical Agent-Destruction Pilot Plant Static Detonation Chamber Support Equipment (50189285077)	PEO ACWA	CC BY	View
Ductwork and mechanical services in a commercial building	Wolfmann	CC BY-SA 4.0	View
Mitsubishi Electric MUZ-FD25VABH room air conditioner	Santeri Viinamäki	CC BY-SA	View
Row of large commercial rooftop HVAC units on a building roof	PEO ACWA	CC BY 2.0	View
Hotel building exterior	Mark Hogan from San Francisco, California, USA	CC BY-SA 2.0	View
Commercial rooftop air handling plant	PEO ACWA	CC BY 2.0	View
auguste perret, architect: 25 bis rue franklin apartment building, paris 1903-1904	seier+seier	CC BY 2.0	View
Jersey City Skyline September 2025 038 (cropped)	Kidfly182	CC BY	View
Steel office building	SteelMaster Buildings	CC BY-SA 2.0	View
Hotel facade with through-wall PTAC units at every window	Joseph Gonzalez miracletwentyone	CC0	View
Retail shopping center exterior	Michael Rivera	CC BY-SA 3.0	View
Packaged commercial rooftop HVAC unit installed on a flat roof	P199	CC Public domain	View
Meier & Frank Warehouse building, Portland, OR 2012	Another Believer	CC BY-SA 3.0	View
High-voltage power lines in Mercer County Park, Lawrence, New Jersey	Famartin	CC BY-SA 3.0	View
PSE&G Lawnside Substation, New Jersey	Tonyglen14	CC BY 2.0	View
Itron OpenWay electricity meter at an apartment complex	Dwight Burdette	CC BY 3.0	View
Utility meters outside a mill building in Nashua, New Hampshire	MarkBuckawicki	CC0 1.0	View