---
title: Energy Recovery Ventilators
…170 unchanged lines
```datasheet
−label: Design Conditions
−type: group
−fields:
− - label: Summer outdoor air dry-bulb
− type: range
− unit: °F
− min: 85
− max: 115
− step: 1
− default: 95
− - label: Summer outdoor air wet-bulb (coincident)
− type: range
− unit: °F
− min: 68
− max: 85
− step: 1
− default: 78
− - label: Winter outdoor air dry-bulb
− type: range
− unit: °F
− min: -20
− max: 35
− step: 1
− default: 5
− - label: Minimum outdoor temperature for full flow without frost control
− type: range
− unit: °F
− min: -10
− max: 32
− step: 1
− default: 15
+label: Design Conditions — Summer outdoor air dry-bulb
+type: range
+unit: °F
+min: 85
+max: 115
+step: 1
+default: 95
```
+```datasheet
+label: Design Conditions — Summer outdoor air wet-bulb (coincident)
+type: range
+unit: °F
+min: 68
+max: 85
+step: 1
+default: 78
+```
+
+```datasheet
+label: Design Conditions — Winter outdoor air dry-bulb
+type: range
+unit: °F
+min: -20
+max: 35
+step: 1
+default: 5
+```
+
+```datasheet
+label: Design Conditions — Minimum outdoor temperature for full flow without frost control
+type: range
+unit: °F
+min: -10
+max: 32
+step: 1
+default: 15
+```
+
# Energy Recovery Performance {toc}
…11 unchanged lines
```datasheet
−label: Recovery Type and Effectiveness
−type: group
−fields:
− - label: Recovery type
− type: radio
− options:
− - "Sensible only (heat recovery ventilator)"
− - "Total / enthalpy (energy recovery ventilator)"
− default: "Total / enthalpy (energy recovery ventilator)"
− - label: Certified sensible effectiveness at design airflow
− type: range
− unit: "%"
− min: 70
− max: 85
− step: 1
− default: 75
− - label: Certified total (enthalpy) effectiveness at design airflow
− type: range
− unit: "%"
− min: 60
− max: 80
− step: 1
− default: 70
− - label: Effectiveness reporting points
− type: radio
− options:
− - "100% and 75% of design supply airflow"
− - "100% of design supply airflow only"
− default: "100% and 75% of design supply airflow"
+label: Recovery Type and Effectiveness — Recovery type
+type: radio
+options:
+ - "Sensible only (heat recovery ventilator)"
+ - "Total / enthalpy (energy recovery ventilator)"
+default: "Total / enthalpy (energy recovery ventilator)"
```
+```datasheet
+label: Recovery Type and Effectiveness — Certified sensible effectiveness at design airflow
+type: range
+unit: "%"
+min: 70
+max: 85
+step: 1
+default: 75
+```
+
+```datasheet
+label: Recovery Type and Effectiveness — Certified total (enthalpy) effectiveness at design airflow
+type: range
+unit: "%"
+min: 60
+max: 80
+step: 1
+default: 70
+```
+
+```datasheet
+label: Recovery Type and Effectiveness — Effectiveness reporting points
+type: radio
+options:
+ - "100% and 75% of design supply airflow"
+ - "100% of design supply airflow only"
+default: "100% and 75% of design supply airflow"
+```
+
## Exhaust Air Transfer and Cross-Leakage {toc}
…19 unchanged lines
```datasheet
−label: Exhaust Air Class and Leakage Limits
−type: group
−fields:
− - label: Served exhaust air class (ASHRAE 62.1)
− type: radio
− options:
− - "Class 1"
− - "Class 2"
− - "Class 3"
− - "Class 4"
− default: "Class 1"
− - label: Maximum exhaust air transfer ratio (EATR)
− type: range
− unit: "%"
− min: 0
− max: 10
− step: 1
− default: 5
− - label: Zero cross-leakage (separated-stream) required
− type: radio
− options:
− - "No - cross-leakage within class limit acceptable"
− - "Yes - separated-stream core required"
− default: "No - cross-leakage within class limit acceptable"
+label: Exhaust Air Class and Leakage Limits — Served exhaust air class (ASHRAE 62.1)
+type: radio
+options:
+ - "Class 1"
+ - "Class 2"
+ - "Class 3"
+ - "Class 4"
+default: "Class 1"
```
+```datasheet
+label: Exhaust Air Class and Leakage Limits — Maximum exhaust air transfer ratio (EATR)
+type: range
+unit: "%"
+min: 0
+max: 10
+step: 1
+default: 5
+```
+
+```datasheet
+label: Exhaust Air Class and Leakage Limits — Zero cross-leakage (separated-stream) required
+type: radio
+options:
+ - "No - cross-leakage within class limit acceptable"
+ - "Yes - separated-stream core required"
+default: "No - cross-leakage within class limit acceptable"
+```
+
## Outdoor Air Correction Factor {toc}
…97 unchanged lines
```datasheet
−label: Frost Control
−type: group
−fields:
− - label: Frost-control method
− type: radio
− options:
− - "Outdoor air preheat"
− - "Recovery bypass / cyclic defrost"
− - "Exhaust-air recirculation"
− - "Controlled glycol return temperature (runaround only)"
− - "None - climate does not require frost control"
− default: "Recovery bypass / cyclic defrost"
− - label: Frost-control activation temperature
− type: range
− unit: °F
− min: -10
− max: 32
− step: 1
− default: 10
+label: Frost Control — Frost-control method
+type: radio
+options:
+ - "Outdoor air preheat"
+ - "Recovery bypass / cyclic defrost"
+ - "Exhaust-air recirculation"
+ - "Controlled glycol return temperature (runaround only)"
+ - "None - climate does not require frost control"
+default: "Recovery bypass / cyclic defrost"
```
+```datasheet
+label: Frost Control — Frost-control activation temperature
+type: range
+unit: °F
+min: -10
+max: 32
+step: 1
+default: 10
+```
+
# Economizer Bypass {toc}
…9 unchanged lines
```datasheet
−label: Economizer Bypass
−type: group
−fields:
− - label: Bypass method
− type: radio
− options:
− - "Wheel stop (rotary devices)"
− - "Bypass damper (fixed-plate / heat-pipe)"
− - "Glycol pump stop / loop bypass (runaround)"
− default: "Bypass damper (fixed-plate / heat-pipe)"
− - label: Interlocked with air-side economizer control
− type: radio
− options:
− - "Yes - bypass interlocked with economizer"
− - "No - economizer not present on served system"
− default: "Yes - bypass interlocked with economizer"
+label: Economizer Bypass — Bypass method
+type: radio
+options:
+ - "Wheel stop (rotary devices)"
+ - "Bypass damper (fixed-plate / heat-pipe)"
+ - "Glycol pump stop / loop bypass (runaround)"
+default: "Bypass damper (fixed-plate / heat-pipe)"
```
+```datasheet
+label: Economizer Bypass — Interlocked with air-side economizer control
+type: radio
+options:
+ - "Yes - bypass interlocked with economizer"
+ - "No - economizer not present on served system"
+default: "Yes - bypass interlocked with economizer"
+```
+
# Fans {toc}
…11 unchanged lines
```datasheet
−label: Fans and Airflow
−type: group
−fields:
− - label: Fan arrangement
− type: radio
− options:
− - "Integral supply and exhaust fans (packaged unit)"
− - "Fans external (core-only in separate AHU)"
− default: "Integral supply and exhaust fans (packaged unit)"
− - label: Design supply (outdoor) airflow
− type: range
− unit: cfm
− min: 200
− max: 20000
− step: 50
− default: 2000
− drawing_ref: true
− - label: Design exhaust airflow
− type: range
− unit: cfm
− min: 200
− max: 20000
− step: 50
− default: 1900
− drawing_ref: true
− - label: Supply external static pressure (excludes core)
− type: range
− unit: in w.g.
− min: 0.25
− max: 4.0
− step: 0.05
− default: 1.0
− - label: Maximum supply-to-exhaust airflow imbalance
− type: range
− unit: "%"
− min: 0
− max: 25
− step: 1
− default: 10
+label: Fans and Airflow — Fan arrangement
+type: radio
+options:
+ - "Integral supply and exhaust fans (packaged unit)"
+ - "Fans external (core-only in separate AHU)"
+default: "Integral supply and exhaust fans (packaged unit)"
```
+```datasheet
+label: Fans and Airflow — Design supply (outdoor) airflow
+type: range
+unit: cfm
+min: 200
+max: 20000
+step: 50
+default: 2000
+drawing_ref: true
+```
+
+```datasheet
+label: Fans and Airflow — Design exhaust airflow
+type: range
+unit: cfm
+min: 200
+max: 20000
+step: 50
+default: 1900
+drawing_ref: true
+```
+
+```datasheet
+label: Fans and Airflow — Supply external static pressure (excludes core)
+type: range
+unit: in w.g.
+min: 0.25
+max: 4.0
+step: 0.05
+default: 1.0
+```
+
+```datasheet
+label: Fans and Airflow — Maximum supply-to-exhaust airflow imbalance
+type: range
+unit: "%"
+min: 0
+max: 25
+step: 1
+default: 10
+```
+
# Demand-Controlled Modulation {toc}
…5 unchanged lines
```datasheet
−label: Demand-Controlled Ventilation Modulation
−type: group
−fields:
− - label: DCV airflow modulation
− type: radio
− options:
− - "Fixed airflow - no modulation"
− - "Modulating airflow on ventilation demand"
− default: "Fixed airflow - no modulation"
− - label: Minimum modulated airflow (% of design)
− type: range
− unit: "%"
− min: 30
− max: 100
− step: 5
− default: 50
+label: Demand-Controlled Ventilation Modulation — DCV airflow modulation
+type: radio
+options:
+ - "Fixed airflow - no modulation"
+ - "Modulating airflow on ventilation demand"
+default: "Fixed airflow - no modulation"
```
+```datasheet
+label: Demand-Controlled Ventilation Modulation — Minimum modulated airflow (% of design)
+type: range
+unit: "%"
+min: 30
+max: 100
+step: 5
+default: 50
+```
+
# Filtration {toc}
…7 unchanged lines
```datasheet
−label: Filtration
−type: group
−fields:
− - label: Outdoor air filter MERV rating
− type: select
− options:
− - "MERV 8"
− - "MERV 11"
− - "MERV 13"
− default: "MERV 8"
− - label: Exhaust air filter MERV rating
− type: select
− options:
− - "MERV 8"
− - "MERV 11"
− - "MERV 13"
− default: "MERV 8"
+label: Filtration — Outdoor air filter MERV rating
+type: select
+options:
+ - "MERV 8"
+ - "MERV 11"
+ - "MERV 13"
+default: "MERV 8"
```
+```datasheet
+label: Filtration — Exhaust air filter MERV rating
+type: select
+options:
+ - "MERV 8"
+ - "MERV 11"
+ - "MERV 13"
+default: "MERV 8"
+```
+
# Casing and Condensate {toc}
…9 unchanged lines
```datasheet
−label: Casing and Condensate
−type: group
−fields:
− - label: Casing construction
− type: radio
− options:
− - "Double-wall insulated with thermal break"
− - "Double-wall insulated (interior unit, no thermal break)"
− default: "Double-wall insulated with thermal break"
− - label: Condensate drain provided
− type: radio
− options:
− - "Yes - drain pan and trapped connection"
− - "No - sensible-only device, no condensation expected"
− default: "Yes - drain pan and trapped connection"
− - label: Installation environment
− type: radio
− options:
− - "Outdoor / rooftop - weatherproofed"
− - "Indoor - mechanical room or ceiling"
− default: "Outdoor / rooftop - weatherproofed"
+label: Casing and Condensate — Casing construction
+type: radio
+options:
+ - "Double-wall insulated with thermal break"
+ - "Double-wall insulated (interior unit, no thermal break)"
+default: "Double-wall insulated with thermal break"
```
+```datasheet
+label: Casing and Condensate — Condensate drain provided
+type: radio
+options:
+ - "Yes - drain pan and trapped connection"
+ - "No - sensible-only device, no condensation expected"
+default: "Yes - drain pan and trapped connection"
+```
+
+```datasheet
+label: Casing and Condensate — Installation environment
+type: radio
+options:
+ - "Outdoor / rooftop - weatherproofed"
+ - "Indoor - mechanical room or ceiling"
+default: "Outdoor / rooftop - weatherproofed"
+```
+
# Controls and Integration {toc}
…85 unchanged lines
default: "One complete set of replacement filters per device"
```