Sample interview questions: Can you explain your knowledge of different types of air handling units used in hydronic systems and their integration requirements?
Sample answer:
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Constant Volume (CV) Units: These units maintain a constant supply of air at a fixed airflow rate, regardless of the load. They are typically used in applications where the heating or cooling load is relatively constant, such as warehouses or large office buildings. CV units are relatively simple to install and maintain, but they can be less efficient than other types of air handling units.
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Variable Air Volume (VAV) Units: VAV units control the airflow rate based on the load. They can be used in applications where the heating or cooling load varies throughout the day or week, such as in a school or a hospital. VAV units are more efficient than CV units, but they can be more complex to install and maintain.
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Dual Duct Units: These units supply two streams of air at different temperatures, one for heating and one for cooling. The air is then mixed to achieve the desired temperature. Dual duct units are typically used in applications where there is a need for both heating and cooling, such as in a restaurant or a hotel. Dual duct units are more expensive to install and maintain than other types of air handling units.
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Single Duct Units: These units supply a single stream of air at a fixed temperature. The air can be reheated or cooled to achieve the desired tem… Read full answer
Source: https://hireabo.com/job/12_0_14/Hydronic%20Technician