Across
- 1. caused by non-functioning combi boiler
- 3. a combi boiler converts chemical energy into...?
- 4. regulates the carbon dioxid content of the combi boiler
- 6. a pipe for transferring excess gas outside of the boiler
- 8. system used to transfer heat between two or more fluids
- 10. tank containing both gas and oxygen
Down
- 2. used for inflaming gas/oxygen-mix
- 5. can be filled with warm water; used for hygiene and relaxation
- 7. protects heating systems from excessive pressure
- 9. transfers heat to the surroundings