Findings:
- Heating oil
- Sealing heating and cooling air ducts
- central heating
- gravity warm-air heating system
- plasma heating
- radio frequency heating
- ohmic heating
- neutral beam heating
- Grate
- heating
- grate limit
- grate area
- furnace grate
- Slowly, the sewer grates of France creak open
- Fulton street station, warm rain falling through the grates
- The little grates at the top of my bedroom walls
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