In most cases the best way to find Greenheck replacement parts is with your product serial number. However, select Greenheck parts are only available based on your product model. Please select from the following product models to identify and purchase replacement parts.
Use the calculator to determine the Air Exchange (CFM) required to adequately ventilate an area.
Enter information into the fields below to calculate the required airflow per fan.
To calculate the CFM required to adequately ventilate an area, we divide the room volume by the appropriate “Minutes per Change” value.
[CFM] = [Room Volume] / [Min./Chg.]
Airflow (CFM) per Fan
*
Starred items represent required fields.
Calculate Static Pressure (SP)
Use the calculator to determine the amount of static pressure the fan must overcome.
The pressure generated by fans in ductwork is typically very small. An accurate measurement of static presure is critical to proper fan selection however. Static pressure in fan systems is typically less than 2" SP, or 0.072 Psi.
The amount of static pressure that the fan must overcome depends on the air velocity in the ductwork, the number of duct turns (and other resistive elements), and the duct length. For properly designed systems with sufficient make-up air, the guidelines in the table below can be used for estimating static pressure.
Static pressure
*Starred items represent required fields.
Static Pressure Guidelines
Non-Ducted 0.05" to 0.20"
Ducted 0.20" to 0.40" per 100 feet of duct (assuming duct air velocity falls within 1,000 to 1,800 feet per minute)
Important: Static pressure requirements are significantly affected by the amount of make-up air supplied to an area. Insufficient make-up air will increase static pressure and reduce the amount of air that will be exhausted. Remember, for each cubic foot of air exhausted, one cubic foot of air must be supplied.
Model SQ, direct drive centrifugal inline fans feature a unique combination of installation flexibility, rugged construction, ease of service, high efficiency and low sound levels. These compact fans are ideal for indoor clean air applications including exhaust, return or make-up where space is a prime consideration.
Model SQ, direct drive centrifugal inline fans feature a unique combination of installation flexibility, rugged construction, ease of service, high efficiency and low sound levels. These compact fans are ideal for indoor clean air applications including exhaust, return or make-up where space is a prime consideration.
Model SQ, direct drive centrifugal inline fans feature a unique combination of installation flexibility, rugged construction, ease of service, high efficiency and low sound levels. These compact fans are ideal for indoor clean air applications including exhaust, return or make-up where space is a prime consideration.
Model SQ, direct drive centrifugal inline fans feature a unique combination of installation flexibility, rugged construction, ease of service, high efficiency and low sound levels. These compact fans are ideal for indoor clean air applications including exhaust, return or make-up where space is a prime consideration.
Model SQ, direct drive centrifugal inline fans feature a unique combination of installation flexibility, rugged construction, ease of service, high efficiency and low sound levels. These compact fans are ideal for indoor clean air applications including exhaust, return or make-up where space is a prime consideration.
Model SQ, direct drive centrifugal inline fans feature a unique combination fo installation flexibility, rugged construction, ease of service, high efficiency and low sound levels. These compact fans are ideal for indoor clean air applications including exhaust, return or make-up where space is a prime consideration.
Model SQ, direct drive centrifugal inline fans feature a unique combination fo installation flexibility, rugged construction, ease of service, high efficiency and low sound levels. These compact fans are ideal for indoor clean air applications including exhaust, return or make-up where space is a prime consideration.
Model SQ, direct drive centrifugal inline fans feature a unique combination fo installation flexibility, rugged construction, ease of service, high efficiency and low sound levels. These compact fans are ideal for indoor clean air applications including exhaust, return or make-up where space is a prime consideration.
Model SQ, direct drive centrifugal inline fans feature a unique combination fo installation flexibility, rugged construction, ease of service, high efficiency and low sound levels. These compact fans are ideal for indoor clean air applications including exhaust, return or make-up where space is a prime consideration.
Model SQ, direct drive centrifugal inline fans feature a unique combination fo installation flexibility, rugged construction, ease of service, high efficiency and low sound levels. These compact fans are ideal for indoor clean air applications including exhaust, return or make-up where space is a prime consideration.
Model SQ, direct drive centrifugal inline fans feature a unique combination fo installation flexibility, rugged construction, ease of service, high efficiency and low sound levels. These compact fans are ideal for indoor clean air applications including exhaust, return or make-up where space is a prime consideration.
Low profile bathroom exhaust fan, Model SP-B features a forward-curved wheel for low sound and high efficiency. Units are ideal for residential, multi-family or hotel applications.
Low profile bathroom exhaust fan, Model SP-B features a forward-curved wheel for low sound and high efficiency. Units are ideal for residential, multi-family or hotel applications.
Motion and humidity sensing grille options available
Low profile bathroom exhaust fan, Model SP-B features a forward-curved wheel for low sound and high efficiency. Units are ideal for residential, multi-family or hotel applications.
Low profile bathroom exhaust fan, Model SP-B features a forward-curved wheel for low sound and high efficiency. Units are ideal for residential, multi-family or hotel applications.
Low profile bathroom exhaust fan, Model SP-B features a forward-curved wheel for low sound and high efficiency. Units are ideal for residential, multi-family or hotel applications.
Low profile bathroom exhaust fan, Model SP-B features a forward-curved wheel for low sound and high efficiency. Units are ideal for residential, multi-family or hotel applications.
Low profile bathroom exhaust fan, Model SP-B features a forward-curved wheel for low sound and high efficiency. Units are ideal for residential, multi-family or hotel applications.
Motion and humidity sensing grille options available
Low profile bathroom exhaust fan, Model SP-B features a forward-curved wheel for low sound and high efficiency. Units are ideal for residential, multi-family or hotel applications.
ENERGY STAR rated
Compact size for height restricted areas
Integral damper prevents unwanted backdrafts
Round standard outlet for quick, easy connections
Speed controllable
Designer grille included
Motion and humidity sensing grille options available
Model SP-AP features a virtually silent electronically commutated (EC) motor with three built-in, high-speed airflow settings (50, 80 or 110 cfm) and an integrated nightlight. Humidity and CO2 plug and play sensors are also available accessories for this model.
ENERGY STAR rated
Virtually silent EC motor with 3 high speeds (50-80-110 CFM)
Constant CFM technology
Plug and play sensors available
Universal 4”, 5” or 6” duct connector
Easy installation bracket
Two speed capable with integral time delay
Integral nightlight
Compatible with CRD-300WT, a UL263 certified Ceiling Radiation
Model SP-AP features a virtually silent electronically commutated (EC) motor with three built-in, high-speed airflow settings (50, 80 or 110 cfm) and an integrated nightlight. Humidity and CO2 plug and play sensors are also available accessories for this model.
ENERGY STAR rated
Virtually silent EC motor with 3 high speeds (50-80-110 CFM)
Model SP-AP features a virtually silent electronically commutated (EC) motor with three built-in, high-speed airflow settings (50, 80 or 110 cfm) and a handful of plug and play sensors available as add-ons.
ENERGY STAR rated
Virtually silent EC motor with 3 high speeds (50-80-110 CFM)
Constant CFM technology
Plug and play sensors available
Universal 4”, 5” or 6” duct connector
Easy installation bracket
Two speed capable with integral time delay
Compatible with CRD-300WT, a UL263 certified Ceiling Radiation
Model SP-AP features a virtually silent electronically commutated (EC) motor with three built-in, high-speed airflow settings (50, 80 or 110 cfm) and a handful of plug and play sensors available as add-ons.
ENERGY STAR rated
Virtually silent EC motor with 3 high speeds (50-80-110 CFM)
Model SP-VG, bathroom exhaust fan features Vari-Green EC motor technology, allowing for increased energy savings. Units operate at a constant CFM up to 0.875 in. wg. And provide continuous or intermittent ventilation while maintaining extremely low sound levels.
Motion and humidity sensing grille options available
Energy efficient Vari-Green motor
ENERGY STAR rated
Industry-leading low sound levels
Units operate at a constant cfm up to 0.875 in. wg. and provides continuous or intermittent ventilation while maintaining extremely low sound levels
Model SP-A direct drive, ceiling mounted fan is designed to provide the lowest sounds levels for bathroom exhaust. Units feature an insulated housing and are ideal for residential, multi-family or hotel applications.
Model SP-A direct drive, ceiling mounted fan is designed to provide the lowest sounds levels for bathroom exhaust. Units feature an insulated housing and are ideal for residential, multi-family or hotel applications.
Model SP-A direct drive, ceiling mounted fan is designed to provide the lowest sounds levels for bathroom exhaust. Units feature an insulated housing and are ideal for residential, multi-family or hotel applications. Vari-Green EC motor technology included for maximum fan controllability.
External electrical access reduces installation time
Spring loaded aluminum backdraft damper eliminates rattling
Model SP-A direct drive, ceiling mounted fan is designed to provide the lowest sounds levels for bathroom exhaust. Units feature an insulated housing and are ideal for residential, multi-family or hotel applications.
Model SP-A direct drive, ceiling mounted fan is designed to provide the lowest sounds levels for bathroom exhaust. Units feature an insulated housing and are ideal for residential, multi-family or hotel applications.
Model SP-A direct drive, ceiling mounted fan is designed to provide the lowest sounds levels for bathroom exhaust. Units feature an insulated housing and are ideal for residential, multi-family or hotel applications. Vari-Green EC motor technology included for maximum fan controllability.
External electrical access reduces installation time
Spring loaded aluminum backdraft damper eliminates rattling
Model SP-A direct drive, ceiling mounted fan is designed to provide the lowest sounds levels for bathroom exhaust. Units feature an insulated housing and are ideal for residential, multi-family or hotel applications.
Model SP-A direct drive, ceiling mounted fan is designed to provide the lowest sounds levels for bathroom exhaust. Units feature an insulated housing and are ideal for residential, multi-family or hotel applications.
Model SP-VG, bathroom exhaust fan features Vari-Green EC motor technology, allowing for increased energy savings. Units operate at a constant CFM up to 0.875 in. wg. And provide continuous or intermittent ventilation while maintaining extremely low sound levels.
Motion and humidity sensing grille options available
Energy efficient Vari-Green motor
ENERGY STAR rated
Industry-leading low sound levels
Units operate at a constant cfm up to 0.875 in. wg. and provides continuous or intermittent ventilation while maintaining extremely low sound levels
Model SP-VG, bathroom exhaust fan features Vari-Green EC motor technology, allowing for increased energy savings. Units operate at a constant CFM up to 0.875 in. wg. And provide continuous or intermittent ventilation while maintaining extremely low sound levels.
Energy efficient Vari-Green motor
Industry-leading low sound levels
Units operate at a constant cfm up to 0.875 in. wg. and provides continuous or intermittent ventilation while maintaining extremely low sound levels
