Thinking you need the priciest smart device to cut your energy bill? That assumption could actually cost you more. This episode breaks down the real-world differences between smart thermostats and smart AC controllers—two solutions that seem interchangeable but work with completely different HVAC systems. Whether you're running central air, window units, or mini-splits, Marcus Chen draws on dozens of installations to explain which technology delivers genuine savings for your specific setup.

• Smart AC controllers can save 10–15% more energy than smart thermostats when retrofitting window or mini-split units, but that higher percentage often applies to a smaller portion of your total cooling load.

• Smart thermostats deliver 15–23% savings on heating and cooling by managing multi-zone temperature control, adaptive lea ...