Safety
How often should you change the filters on your respirator?
When breathing resistance increases or the filters look dirty or damaged.
For intermittent use (1-2 hours per week), they should be changed every 6 months.
Your respirator needs to be with you every day, and should be in a sealed bag when not in use to prevent contamination.
Why do we test run the furnace before and after our cleaning process?
To ensure the furnace is working properly, and that we are not left liable for previously existing issues.
Volatile Organic Compound
What does NPS stand for?
Net Promoter Score
How much dirt and dust build-up on a furnace's blower wheel can reduce its efficiency by up to 30%?
1/8 of an inch
When would wearing eye protection matter most?
When cutting or working overhead.
What's the difference between ON and AUTO for the fan setting on a thermostat?
ON means the fan is running continuously.
AUTO means the fan only runs when the system calls for heating or cooling.
How many microwatts is our 15" UVC lamp?
150mW
Why do we not cover up all the vents in a residential home?
Because it can collapse or cause damage to the ductwork.
Explain how an HRV works?
Transfers the outgoing heat to the incoming air.
Fresh air comes into the unit, passes through the core to absorb the warmth from the return air to recirculate the heat back into the home, and exhaust the dirty air outside.
When should you have steel-toe footwear available?
Every day, if they aren't already on your feet.
If we don't have a filter block, what are 2 alternate options?
Use the existing filter and place it in a trash bag or use DUCTMASK over it.
What is the ideal humidity level for an occupied building?
30%-50%
What is the name of the (+) bit in our screwdrivers?
Phillips
As little as ___mm of buildup on a condenser coil will cause a 21% drop in efficiency?
1 milimeter (0.042")
In North America, how many dryer fires are there every year?
Over 13,000. Approximately 1 every 40 minutes.
How many rags should we be going through in a typical day (per Sprinter/technician)
2-3 rags MAX
How does humidity impact indoor air quality?
High humidity can lead to an increase in mold/mildew growth and dust mites.
Low humidity can lead to respiratory irritation, dry skin, eyes, nasal passages, and an increased susceptibility to colds and illnesses.
What does GFCI stand for?
Ground Fault Circuit Interrupter
What's a good way to minimize the amount of equipment you have to load out when you're done the cleaning process?
What would you do if you saw a cracked or damaged heat exchange?
Report it to the homeowner / site contact immediately upon discovery and let them know that an HVAC professional needs to come inspect it right away. The system should not be used until it is inspected.
This is rare, but important. This can cause a carbon monoxide leak which can be very serious.
Why do we not drain compressor tanks while on a client's driveway?
To prevent the possibility of stains or damage to the driveway.
____% of homes tested had toxic compounds including pesticides, cleaning compounds, chemicals found in furniture and building materials, that can be the cause of asthma, allergies, and other ailments.
- Harvard University Silent Spring Study
100%
What is the function of the pilot valve on our non-VMAC compressors?
The pilot valve, when disengaged, takes pressure off of the pump head while the engine is warming up.
After we're done cleaning a heat pump system, when should we turn it back on?
Immediately. Heat pumps can take more time than a traditional furnace to turn back on, so we can let it turn on while we patch and remove our equipment from the home.