Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
---
title: HVAC Duct Accessories
…62 unchanged lines
type: checkbox
options:
− - label: Product data (dampers, doors, connectors, vanes, silencers)
− default: true
− - label: AMCA 500-D leakage / pressure-drop test reports
− default: true
− - label: UL 181 Class I listing (flexible connectors, closures)
− default: true
− - label: Shop drawings (access door locations, vane layouts, damper schedule)
− default: true
− - label: Actuator data sheets (torque, signal, fail position)
− default: true
+ - Product data (dampers, doors, connectors, vanes, silencers)
+ - AMCA 500-D leakage / pressure-drop test reports
+ - UL 181 Class I listing (flexible connectors, closures)
+ - Shop drawings (access door locations, vane layouts, damper schedule)
+ - Actuator data sheets (torque, signal, fail position)
+default: Actuator data sheets (torque, signal, fail position)
```
…9 unchanged lines
type: checkbox
options:
− - label: O&M data (motorized dampers, actuators, silencers)
− default: true
− - label: Record drawings (as-installed access door / damper locations)
− default: true
− - label: Air balance report with final damper positions
− default: true
+ - O&M data (motorized dampers, actuators, silencers)
+ - Record drawings (as-installed access door / damper locations)
+ - Air balance report with final damper positions
+default: Air balance report with final damper positions
```
…8 unchanged lines
type: checkbox
options:
− - label: Field duct leakage test reports
− default: false
− - label: Corrosion-resistant material certifications (aluminum / stainless)
− default: false
+ - Field duct leakage test reports
+ - Corrosion-resistant material certifications (aluminum / stainless)
```
…26 unchanged lines
type: radio
options:
− - label: Galvanized steel (standard conditioned air)
− default: true
− - label: Aluminum (corrosive / coastal / weight-sensitive)
− - label: 304 stainless steel (kitchen / lab exhaust)
+ - Galvanized steel (standard conditioned air)
+ - Aluminum (corrosive / coastal / weight-sensitive)
+ - 304 stainless steel (kitchen / lab exhaust)
+default: Galvanized steel (standard conditioned air)
```
…26 unchanged lines
type: radio
options:
− - label: Multi-blade opposed (modulating / balancing)
− default: true
− - label: Multi-blade parallel (two-position only)
− - label: Single-blade butterfly (round duct, ≤24 in.)
+ - Multi-blade opposed (modulating / balancing)
+ - Multi-blade parallel (two-position only)
+ - Single-blade butterfly (round duct, ≤24 in.)
+default: Multi-blade opposed (modulating / balancing)
```
…16 unchanged lines
type: radio
options:
− - label: Low pressure (≤2 in. w.g.)
− default: true
− - label: Medium pressure (2-6 in. w.g.)
− - label: High pressure (6-10 in. w.g.)
+ - Low pressure (≤2 in. w.g.)
+ - Medium pressure (2-6 in. w.g.)
+ - High pressure (6-10 in. w.g.)
+default: Low pressure (≤2 in. w.g.)
```
…2 unchanged lines
type: radio
options:
− - label: Class 1 (≤10 CFM/ft² at 1 in. w.g.)
− default: true
− - label: Class 1A (≤4 CFM/ft² at 1 in. w.g.)
− - label: Class 2 (≤20 CFM/ft² at 1 in. w.g.)
+ - Class 1 (≤10 CFM/ft² at 1 in. w.g.)
+ - Class 1A (≤4 CFM/ft² at 1 in. w.g.)
+ - Class 2 (≤20 CFM/ft² at 1 in. w.g.)
+default: Class 1 (≤10 CFM/ft² at 1 in. w.g.)
```
…12 unchanged lines
type: radio
options:
− - label: Galvanized steel
− default: true
− - label: Aluminum
− - label: 304 stainless steel
+ - Galvanized steel
+ - Aluminum
+ - 304 stainless steel
+default: Galvanized steel
```
…2 unchanged lines
type: radio
options:
− - label: Airfoil (low pressure drop, low sound)
− default: true
− - label: Single-skin flat
+ - Airfoil (low pressure drop, low sound)
+ - Single-skin flat
+default: Airfoil (low pressure drop, low sound)
```
…14 unchanged lines
type: radio
options:
− - label: Manual locking quadrant
− default: true
− - label: Electric 24 V on/off
− - label: Electric 120 V on/off
− - label: Modulating 2-10 VDC
− - label: Modulating 0-10 VDC
+ - Manual locking quadrant
+ - Electric 24 V on/off
+ - Electric 120 V on/off
+ - Modulating 2-10 VDC
+ - Modulating 0-10 VDC
+default: Manual locking quadrant
```
…2 unchanged lines
type: radio
options:
− - label: Fail closed
− - label: Fail open
− - label: Fail in place
− default: true
+ - Fail closed
+ - Fail open
+ - Fail in place
+default: Fail in place
```
…28 unchanged lines
type: radio
options:
− - label: Gravity (multi-blade, no power)
− default: true
− - label: Spring-assisted (faster close)
− - label: Motorized (tight shutoff for energy code)
+ - Gravity (multi-blade, no power)
+ - Spring-assisted (faster close)
+ - Motorized (tight shutoff for energy code)
+default: Gravity (multi-blade, no power)
```
…22 unchanged lines
type: select
options:
− - label: 8 × 8 in. (inspection)
− - label: 12 × 12 in. (hand access)
− default: true
− - label: 18 × 18 in. (large component / entry)
− - label: 24 × 24 in. (personnel entry)
+ - 8 × 8 in. (inspection)
+ - 12 × 12 in. (hand access)
+ - 18 × 18 in. (large component / entry)
+ - 24 × 24 in. (personnel entry)
+default: 12 × 12 in. (hand access)
```
…2 unchanged lines
type: radio
options:
− - label: Single-wall uninsulated (uninsulated duct)
− default: true
− - label: Double-wall insulated, gasketed (insulated duct)
+ - Single-wall uninsulated (uninsulated duct)
+ - Double-wall insulated, gasketed (insulated duct)
+default: Single-wall uninsulated (uninsulated duct)
```
…2 unchanged lines
type: radio
options:
− - label: CL 12 (medium-pressure commercial)
− default: true
− - label: CL 6 (tighter)
− - label: CL 3 (high-pressure, tightest)
− - label: CL 24 (low-pressure)
+ - CL 12 (medium-pressure commercial)
+ - CL 6 (tighter)
+ - CL 3 (high-pressure, tightest)
+ - CL 24 (low-pressure)
+default: CL 12 (medium-pressure commercial)
```
…22 unchanged lines
type: radio
options:
− - label: Woven fiberglass (high-temp, ≤250 °F)
− default: true
− - label: Neoprene-coated fabric (outdoor / high-humidity, ≤200 °F)
− - label: Elastomeric (vibration isolation)
+ - Woven fiberglass (high-temp, ≤250 °F)
+ - Neoprene-coated fabric (outdoor / high-humidity, ≤200 °F)
+ - Elastomeric (vibration isolation)
+default: Woven fiberglass (high-temp, ≤250 °F)
```
…12 unchanged lines
type: radio
options:
− - label: 24 oz/yd² (fiberglass)
− default: true
− - label: 30 oz/yd² (neoprene-coated)
+ - 24 oz/yd² (fiberglass)
+ - 30 oz/yd² (neoprene-coated)
+default: 24 oz/yd² (fiberglass)
```
…18 unchanged lines
type: radio
options:
− - label: Single-thickness stamped (standard)
− default: true
− - label: Double-thickness airfoil (low loss, low sound)
+ - Single-thickness stamped (standard)
+ - Double-thickness airfoil (low loss, low sound)
+default: Single-thickness stamped (standard)
```
…2 unchanged lines
type: radio
options:
− - label: Galvanized steel
− default: true
− - label: Aluminum
+ - Galvanized steel
+ - Aluminum
+default: Galvanized steel
```
…14 unchanged lines
type: radio
options:
− - label: Packed (fiberglass fill, general HVAC)
− default: true
− - label: Encapsulated fill (healthcare / lab)
− - label: Fill-free / no-media (critical clean air)
+ - Packed (fiberglass fill, general HVAC)
+ - Encapsulated fill (healthcare / lab)
+ - Fill-free / no-media (critical clean air)
+default: Packed (fiberglass fill, general HVAC)
```
…14 unchanged lines
type: radio
options:
− - label: Gasketed reusable plug
− default: true
− - label: Sealed and patched after balance
+ - Gasketed reusable plug
+ - Sealed and patched after balance
+default: Gasketed reusable plug
```
…14 unchanged lines
type: radio
options:
− - label: Yes — per SMACNA leakage class
− - label: No — rated components only
− default: true
+ - Yes — per SMACNA leakage class
+ - No — rated components only
+default: No — rated components only
```
…36 unchanged lines
type: radio
options:
− - label: 1 year
− default: true
− - label: 2 years
− - label: 5 years (actuators / silencers)
+ - 1 year
+ - 2 years
+ - 5 years (actuators / silencers)
+default: 1 year
```
…6 unchanged lines
type: checkbox
options:
− - label: Spare damper actuator(s) of each motorized type
− default: false
− - label: Spare flexible connector fabric (one fan size)
− default: false
− - label: Spare access door gaskets
− default: false
− - label: Spare locking quadrant operators
− default: false
+ - Spare damper actuator(s) of each motorized type
+ - Spare flexible connector fabric (one fan size)
+ - Spare access door gaskets
+ - Spare locking quadrant operators
```