To start, choose HRV or ERV. As you complete each of the required fields, the next will be available as long as the entered value passes validation.

VENTILATION PERFORMANCE

CFM

ENERGY PERFORMANCE
Sensible Recovery Efficiency (SRE) %
 
@ 32 deg F / 0 deg C, low speed
@ 32 deg F / 0 deg C, high speed
Minimum SRE Requirement
75%
68%
Installed Model SRE
 
RETC Eligible
 YES / NO
 
 
Power Consumed @ Low Fan Speed
(Watts)
 
Net Air Flow @ Low Fan Speed
(CFM)
 
 
2014 Maximum EUI for RETC
 Installed Model EUI
Energy use index (EUI)
(Watts / CFM)
(Watts / CFM)
 
 
TIER DETERMINATION - BASED ON TECHNOLOGY (HRV or ERV)
Net Supply Air Flow
Energy Use Index (EUI), watts per cfm
Below 175 cfm
S
 <= 1.10 watts / cfm
1
Above 175 cfm
H
 < 0.75 watts / cfm
2
Tax Credit Calculation
TIER:

 

2014 RETC Credit: