Photo and image credits

Town photos are real photographs from Wikimedia Commons under Creative Commons or public-domain licences, resized and converted to WebP. We have not otherwise changed them.

• Wilmington: John Phelan, CC BY 3.0. Source file.
• Middleton: John Phelan, CC BY-SA 4.0. Source file.
• Reading: John Phelan, CC BY 3.0. Source file.
• Topsfield: John Phelan, CC BY 3.0. Source file.
• Wenham: John Phelan, CC BY-SA 4.0. Source file.
• Burlington: John Phelan, CC BY 3.0. Source file.
• Lexington: John Phelan, CC BY 4.0. Source file.
• Stoneham: Daderot, CC0. Source file.
• Woburn: John Phelan, CC BY 4.0. Source file.
• Winchester: John Phelan, CC BY 4.0. Source file.
• Heat pump outdoor unit (UK): PeterEastern, CC BY-SA 4.0. Source file.

Illustrations

The house cutaway, weatherization and basement illustrations were generated for this site with OpenAI’s GPT Image model and are drawn objects, not photographs of any real home, customer or installer. They show generic equipment and are not a specification.