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Ventilation Data Collection (Utility and Other Fans (Types (Whole house…
Ventilation Data Collection
HRV/ERV
See flow rate flow chart on paper
Collect fan power and efficiency for corresponding flow rates
Fan Power
fan power (W) at 0 °C (32 °F), and at -25 deg C for the flow rate determined in the third bullet, or make note that it is unknown if no HVI data available;
Sensible Efficiency rate
At 0 deg C and at -25deg C
manufacturer name;
model number;
supply and exhaust flow rate (L/s or cfm): Collect the measured flow rates. If the system is not balanced, use the lesser value of the two air flow rates. If unknown, assess as 28 L/s (59 cfm), and make note that it is unknown
Is it part of the whole house ventilation?
Yes
Furnace ductwork
Dedicated low vol ductwork WITHOUT extra fans in addition to HRV fans
Dedicated ductwork WITH additional fans in addition to HRV fans
No
Utility and Other Fans
Types
Whole house intake and exhaust WITHOUT heat recovery
Exhaust only fans with circulation blower motor
Transfer fans
Makeup air fans for range hoods or dryers
Are they part of the whole house system?
yes
Supply and exhaust or just supply
Make and model,Supply and exhaust rates and corresponding fan power rates
Balanced?
No
If system is not balanced, use lesser of those flow rates
Yes
Unknown
Use 25L/Sec, and make note that the rate is unknown
No
unit’s function as supply, exhaust, or supply and exhaust; and
supply and exhaust flow rate(s) (L/s or cfm): collect the lowest flow rates measured. If the system is not balanced, use the lesser of the two air flow rates. If unknown, assess as 25 L/s.
Ductwork system type
Types
Furnace ductwork
Dedicated low vol ductwork WITHOUT extra fans in addition to HRV fans
Dedicated ductwork WITH additional fans in addition to HRV fans
Bathroom fans
Are they stand alone or part of the central system?
Central
Collect if available Make and model,
Exhaust flow rates
Fan pwer-use flow rate determined or use defaults
Stand alone
Only count TWO
Range hoods
Stand alone or part of central system?
Stand alone
Only collect ONE system
Part of whole house system
Make, model.
Flow rate
Fan power
Flow rate:
use lowest rate available or use defaults
Fan power-Use values from HVI directory, NOT Manufacturers as they might include lightbulbs
Dryer
In a zero rated home?
yes
Collect Make/Model, and KWH rating
No
Does not need to be assessed
If the ventilation system is separate from the central duct system, and doesn't serve the whole house it is ALWAYs put into the "supplemental" window ie range hoods, bathroom fans, and HRV's that only serve one section of the house.