Final answer:
To check the draft of a vent-connected appliance, you can use a smoke pencil or smoke test. Proper draft is indicated by the smooth and consistent flow of smoke into the vent, while an issue may be present if the smoke is blown back or doesn't flow well. This process should be done by a trained professional or under their guidance.
Step-by-step explanation:
To check the draft of a vent-connected appliance, you can use a smoke pencil or smoke test. A smoke pencil is a device that emits a small stream of smoke, and it can be used to determine the direction and strength of the air flow in a vent system. You simply hold the smoke pencil near the vent opening and observe the movement of the smoke. If the smoke is drawn into the vent and flows smoothly, it indicates proper draft. If the smoke is pushed back or doesn't flow well, it suggests a problem with the draft.
Another method is the smoke test, which involves lighting a piece of smoking paper or incense stick and holding it near the vent opening. Again, observe the movement of the smoke. If it moves smoothly into the vent, the draft is good. If the smoke is blown back or doesn't flow well, there may be an issue.
It's important to note that checking the draft of a vent-connected appliance should only be done by a trained professional or under their guidance, as working with venting systems involves safety considerations and potential hazards.