- Does it cover all smart home protocols (Z-Wave, Zigbee, Matter)?
- Equipment costs are entered per device regardless of protocol. The calculator shows total cost and annual energy savings estimates; protocol choice affects which hub you need.
- How accurate are the energy savings estimates?
- Savings use US DOE average electricity rates and published device efficiency data. Actual savings vary ±30% based on local rates, usage patterns, and occupancy hours.
- Does it include subscription costs?
- Yes — cloud subscription fees (Ring, Nest Aware, SimpliSafe) are factored into the 5-year cost of ownership alongside hardware.