Podcast
Questions and Answers
What is the standard temperature recommended for thermal comfort according to ASHRAE 55?
What is the standard temperature recommended for thermal comfort according to ASHRAE 55?
Which of the following is NOT a key factor to consider in system design?
Which of the following is NOT a key factor to consider in system design?
How does relative humidity affect the perception of temperature in a space?
How does relative humidity affect the perception of temperature in a space?
Which of the following factors does NOT influence human comfort?
Which of the following factors does NOT influence human comfort?
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What is the recommended relative humidity level for maintaining comfort according to ASHRAE 55?
What is the recommended relative humidity level for maintaining comfort according to ASHRAE 55?
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What is the maximum high side reach for a depth of 10 inches?
What is the maximum high side reach for a depth of 10 inches?
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What is the minimum clear width required for door openings?
What is the minimum clear width required for door openings?
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What is the maximum force to push or pull open an interior hinged door?
What is the maximum force to push or pull open an interior hinged door?
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What is the maximum slope ratio for ramp runs?
What is the maximum slope ratio for ramp runs?
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What is the minimum clear width between handrails on a ramp run?
What is the minimum clear width between handrails on a ramp run?
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What is the maximum rise for any ramp run?
What is the maximum rise for any ramp run?
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How many functions does HVAC technology encompass?
How many functions does HVAC technology encompass?
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What is a criterion for continuous handrails on ramps?
What is a criterion for continuous handrails on ramps?
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What is the primary purpose of dehumidification in indoor environments?
What is the primary purpose of dehumidification in indoor environments?
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What does ventilation aim to achieve in a conditioned space?
What does ventilation aim to achieve in a conditioned space?
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Which process involves raising or maintaining the moisture content of the air?
Which process involves raising or maintaining the moisture content of the air?
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Which of the following contributes to human comfort by moderating indoor air conditions?
Which of the following contributes to human comfort by moderating indoor air conditions?
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What is one result of effective filtration in indoor air quality management?
What is one result of effective filtration in indoor air quality management?
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In the context of air conditioning, which term refers to the exchange of air between the indoors and outdoors?
In the context of air conditioning, which term refers to the exchange of air between the indoors and outdoors?
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Which process helps to lower indoor humidity levels?
Which process helps to lower indoor humidity levels?
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What is the main function of humidification in a conditioned space?
What is the main function of humidification in a conditioned space?
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What is the primary function of a balancing damper in air distribution systems?
What is the primary function of a balancing damper in air distribution systems?
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Which factor does NOT impact the overall sizing of ductwork?
Which factor does NOT impact the overall sizing of ductwork?
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In what scenario should a horizontal fire damper be considered?
In what scenario should a horizontal fire damper be considered?
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What is the required action for ventilation systems when a building is occupied?
What is the required action for ventilation systems when a building is occupied?
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Who determines the occupant load used for designing ventilation systems?
Who determines the occupant load used for designing ventilation systems?
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When considering ventilation for non-smoking lounges, what is assumed about smoke presence?
When considering ventilation for non-smoking lounges, what is assumed about smoke presence?
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What is a smoke damper primarily used for?
What is a smoke damper primarily used for?
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What general area should be avoided when running ductwork?
What general area should be avoided when running ductwork?
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What determines the minimum ventilation rates in a building?
What determines the minimum ventilation rates in a building?
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How is the Total Fresh Air Required (Vbz) calculated for a classroom?
How is the Total Fresh Air Required (Vbz) calculated for a classroom?
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What does ACH stand for in the context of air distribution?
What does ACH stand for in the context of air distribution?
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What is the formula to calculate total airflow in cubic feet per hour (cfh)?
What is the formula to calculate total airflow in cubic feet per hour (cfh)?
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What does CFM stand for in air distribution?
What does CFM stand for in air distribution?
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Which of the following is NOT a factor that affects the sizing criteria of air distribution ductwork?
Which of the following is NOT a factor that affects the sizing criteria of air distribution ductwork?
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What is the maximum allowable length for flexible ductwork?
What is the maximum allowable length for flexible ductwork?
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What must be included in ductwork clearances?
What must be included in ductwork clearances?
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Study Notes
Reach and Doorway Requirements
- Maximum reach height is 48 inches for depths up to 10 inches
- Maximum reach height is 46 inches for depths between 10 inches and 24 inches
- Minimum door opening width is 32 inches
Door Hardware
- Maximum force required for pushing or pulling interior doors and gates is 5 pounds
- Maximum force required for pushing or pulling sliding or folding doors is 5 pounds
Ramps
- Maximum slope for ramp runs is 1:12 (1 inch rise for every 12 inches of run)
- Maximum cross slope for ramp runs is 1:48
- Minimum clear width for ramp runs is 36 inches
- Maximum length of a ramp run without a landing is 30 feet
- Maximum rise for any ramp run is 30 inches
- Ramps must have landings at the top and bottom of each run
- Landings must comply with section 405.7
Handrails
- Handrails must be continuous within the full length of each stair flight and ramp run
- Inside handrails on switchback or dogleg stairs and ramps must be continuous between flights or runs
- Handrails on ramps in assembly areas are not required to be continuous in aisles serving seating
HVAC Systems
- Heating is the technology of indoor environmental comfort
- Ventilation is the process of exchanging air between the outdoors and a conditioned space to dilute contaminants and improve air quality
- Air conditioning is the process of controlling temperature, humidity, and air circulation to provide comfort
Human Comfort
- Thermal comfort standards aim to satisfy 80% of occupants
- ASHRAE 55 is the Standard for Thermal Comfort
- Thermal Comfort is influenced by temperature, humidity, air quality, acoustics, lighting, physical aspects, and psychosocial situations
Thermal and Humidity Control
- Temperature standards for thermal comfort are 75 degrees Fahrenheit with 50% relative humidity
- Lower temperatures are tolerable with slightly elevated humidity
Air Distribution
- Dampers regulate airflow
- Balancing dampers regulate airflow into a space
- Fire dampers close ducts to prevent fires from transferring through ductwork
- Smoke dampers close ductwork to prevent smoke from being distributed throughout a building
Air Distribution Sizing
- Factors that impact overall duct sizing include occupant load, room use, building use, exterior envelope, lighting, equipment, and outdoor conditions
Building Code Ventilation
- Ventilation systems must be designed to supply the minimum outdoor airflow rate
- Ventilation rates are based on occupancy classifications, occupancy density, and airflow rates
- Ventilation systems must supply the required rate of ventilation air continuously during building occupancy
- Smoking lounges are an exception, and must have ventilation exceeding code requirements
CFM and ACH
- Cubic Feet per Minute (CFM) is the amount of air volume moving through ductwork
- Air Changes Per Hour (ACH) is the number of times the air within a space is changed per hour
Air Distribution Ductwork
- Ductwork size is determined by air velocity, pressure, and volume
- Ductwork clearance is the duct size plus 2 inches for insulation
- The last branch of ductwork should be 4 feet from the end of the main duct
- Maximum length of flexible ductwork is 6 feet
- Maximum height of ductwork is the distance from the bottom of a structure to the bottom of a finished ceiling minus 6 to 12 inches
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Description
Test your knowledge on accessibility standards for reach, doorway requirements, ramps, and handrails. This quiz covers the specifications regarding heights, widths, forces, slopes, and other important regulations. Perfect for students and professionals in architecture or design.
