| Answer | Crossword Clue |
|---|---|
| VENT | Heating or cooling outlet |
| RADIATOR | Heating or cooling device |
| BTU | Heating and cooling meas. |
| GEOTHERMAL | Home heating and cooling option |
| ANNEALS | Tempers steel by heating and cooling. |
| VENT | Heating outlet |
| VENT | Central heating outlet |
