Final answer:
The false statement about direct vent gas fireplaces is that they use a chimney; such fireplaces do not need a traditional chimney as they can be vented directly to the outside either horizontally or vertically.
Step-by-step explanation:
The student has asked which statement about direct vent gas fireplaces is false:
- Require outside air
- Use a chimney
- Can be vented horizontally
- Provide heating efficiency
The false statement is b. Use a chimney. Direct vent gas fireplaces are known for their heating efficiency and their ability to vent horizontally or vertically, without the need for a traditional masonry chimney. They are designed to draw fresh air from outside directly into the firebox for combustion, which makes them energy-efficient and safe because they maintain high quality indoor air and prevent heat loss.
Methods of heat transfer involved in making a fireplace more energy-efficient include having an external air supply for combustion and allowing room air to circulate around the fire box and back to the room. These methods involve convection, where the air brought in from outside aids the combustion process, while the circulation of room air helps distribute the heat more effectively.