ERV Latent & Sensible Energy Recovery Calculator
Calculate delivered supply air temperature, moisture transfer (grains/lb and pints/day), and sensible/latent thermal energy recovery (BTU/hr) for enthalpy-core ERVs per AHRI 1060 and CSA C439.
Ventilation Airflow & Operating Mode
CFM
Typical residential home: 80–150 CFM.
Outdoor & Exhaust Air Conditions
°F
%
°F
%
ERV Enthalpy Core Efficiency (AHRI 1060)
%
High-efficiency cores: 70–82%.
%
Moisture permeability factor: 50–70%.
Delivered Fresh Air Condition
DELIVERED AT 56.3°F
Delivered Supply Air Temp
56.3 °F
+41.3°F pre-warmed without heater
Total Thermal Recovery Rate
7,192 BTU/h
2.11 kW continuous thermal relief
Sensible Heat Recovered
5,352 BTU/h
Direct temperature exchange
Latent Moisture Recovered
1,840 BTU/h
17.8 pints / day moisture saved
Moisture Preservation & Comfort Advantage
Indoor Humidity Retained:
22.5 grains/lb moisture transferred
Delivered Supply Relative Humidity:
~48% RH @ 56.3°F
Frost Risk on Core:
Low (Enthalpy core mitigates condensation)
AHRI 1060 & CSA C439 Rating Metrics
Ventilation Engineering
Unlike standard Heat Recovery Ventilators (HRVs) which only transfer sensible heat, Energy Recovery Ventilators (ERVs) feature a water-permeable enthalpy core that transfers moisture between airstreams. In winter, an ERV keeps indoor air from drying out; in summer, it blocks outdoor humidity from entering the air conditioning loop.