Built an n8n workflow that automates HVAC scheduling based on weather forecast and time-of-use electricity rates. Living in Phoenix Arizona where summer cooling is the biggest household expense.
Workflow:
1. Cron trigger at 6am daily
2. HTTP node fetches openweathermap forecast
3. Function node calculates optimal pre-cooling time
4. HTTP node sends schedule to Home Assistant REST API
5. Second workflow monitors real-time energy via webhook
Results: 15-18% reduction in summer electricity bills.
Full workflow JSON export and setup guide at arizonahometips.com. Curious if others use n8n for home automation workflows.