Sandra is a certified energy auditor who spent nine years walking through homes with a clipboard and a thermal camera, finding where energy and money were silently disappearing. Her background is in Mechanical Engineering and her writing reflects the same methodical approach she brought to audits. She covers appliance consumption, heating and cooling efficiency, bill reduction strategies, and the everyday habits that compound into real savings over time. Practical, specific, and written for people who'd rather fix the problem than read another article about it.