5.3003.3 Evaluating Air Flow

Topic: 
Forced Air
Subtopic: 
System Assessment and Maintenance
Desired Outcome: 
Air flow is properly tested
Note: 
The authority having jurisdiction may require that a licensed professional perform certain tasks outlined in this detail.
TitleSpecification(s)Objective(s)
5.3003.3a
Total air flow

Total system air flow will be measured by one of the following methods:

  • Temperature rise
  • Flow plate
  • Fan depressurization device (e.g., Duct Blaster®, DucTester®)

Ensure equipment:

  • Operates as designed
  • Operates efficiently
  • Provides comfort
  • Operates safely
  • Is durable
5.3003.3b
External static pressure

External static pressure will be in accordance with manufacturer specifications

Ensure equipment:

  • Operates as designed
  • Operates efficiently
  • Provides comfort
  • Operates safely
  • Is durable
5.3003.3c
Pressure

Pressure drop across cooling coils will be in accordance with manufacturer specifications

Ensure equipment:

  • Operates as designed
  • Operates efficiently
  • Provides comfort
  • Operates safely
  • Is durable
5.3003.3d
Filter Inspection

Visual inspection to verify filter type is per manufacturer specifications, and is clean

Ensure equipment:

  • Operates as designed
  • Operates efficiently
  • Provides comfort
  • Operates safely
  • Is durable
5.3003.3e
Balancing room flow: new ductwork

Proper air flow delivery to each room will be ensured by one of the following: 

Measuring air flow at each register

OR

Measuring heat rise, room pressures, and interviewing residents to ensure their comfort. 

Ensure equipment:

  • Operates as designed
  • Operates efficiently
  • Provides comfort
  • Operates safely
  • Is durable
5.3003.3f
Supply and return temperature measurements

Supply and return wet bulb (wet bulb temperature is measured for cooling systems only) and dry bulb air temperatures will be recorded

Ensure equipment:

  • Operates as designed
  • Operates efficiently
  • Provides comfort
  • Operates safely
  • Is durable
5.3003.3h
Temperature rise: gas and oil furnaces only

Temperature rise between the supply and return will be in accordance with manufacturer specifications

Ensure equipment:

  • Operates as designed
  • Operates efficiently
  • Provides comfort
  • Operates safely
  • Is durable
TitleSpecification(s)Objective(s)
5.3003.3a
Total air flow

Total system air flow will be measured by one of the following methods:

  • Temperature rise
  • Flow plate
  • Fan depressurization device(e.g., Duct Blaster®, DucTester®)

Ensure equipment:

  • Operates as designed
  • Operates efficiently
  • Provides comfort
  • Operates safely
  • Is durable
5.3003.3b
External static pressure

External static pressure will be in accordance with manufacturer specifications

Ensure equipment:

  • Operates as designed
  • Operates efficiently
  • Provides comfort
  • Operates safely
  • Is durable
5.3003.3c
Pressure

Pressure drop across cooling coils will be in accordance with manufacturer specifications

Ensure equipment:

  • Operates as designed
  • Operates efficiently
  • Provides comfort
  • Operates safely
  • Is durable
5.3003.3d
Filter Inspection

Visual inspection to verify filter type is per manufacturer specifications, and is clean

Ensure equipment:

  • Operates as designed
  • Operates efficiently
  • Provides comfort
  • Operates safely
  • Is durable
5.3003.3e
Balancing room flow: new ductwork

Proper air flow delivery to each room will be ensured by one of the following: 

Measuring air flow at each register

OR

Measuring heat rise, room pressures, and interviewing residents to ensure their comfort. 

Ensure equipment:

  • Operates as designed
  • Operates efficiently
  • Provides comfort
  • Operates safely
  • Is durable
5.3003.3f
Supply wet bulb and dry bulb

Supply and return wet bulb (wet bulb temperature is measured for cooling systems only) and dry bulb air temperatures will be recorded

Ensure equipment:

  • Operates as designed
  • Operates efficiently
  • Provides comfort
  • Operates safely
  • Is durable
5.3003.3h
Temperature rise: gas and oil furnaces only

Temperature rise between the supply and return will be in accordance with manufacturer specifications

Ensure equipment:

  • Operates as designed
  • Operates efficiently
  • Provides comfort
  • Operates safely
  • Is durable