EERV3015, ERV3615
Document # | Revised 10/28/11 Page 2/3 | |
| Renaissance 30”, 36” Wide, | PLANNING |
| High Extension Slim Raised Vents | GUIDE |
Duct Work Design Tips
■■ Wherever possible, reduce the number of transitions and turns to as few sharp angles as possible. Two staggered 45° angles are better than one 90°. Keep turns as far away from the hood exhaust as possible, with as much space between each bend as possible.
■■ For best performance, use round duct instead of rectangular when possible, especially when elbows are required.
■■ If multiple elbows are used, try to keep a minimum of 24” of straight duct between them. Avoid “S” or “back to back” configurations of adjacent elbows.
■■ Do not use flexible metal duct.Calculating the Maximum Duct Run Length
■■ Do not use duct work that is smaller in
■■ For best performance, keep the duct run as short as possible and never exceed the maximums stated at the right.
■■ The maximum straight duct length for the raised vent system depends on the model of remote or
Raised Vent | Approved Dacor | |
Model No. | Blowers* | |
ERV3015 | Remote blowers: | |
REMP3 or REMP16 | ||
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ERV3615 | ||
ILHSF8 or ILHSF10 | ||
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For example, for a raised vent system using 3 ¼” X 10” rectangular duct, two (2) 3 ¼” X 10” 90° elbows, a 3 ¼” X 10” rectangular to 10” round transition, and a REMP16 remote blower:
■■ From the Blower Maximum Duct Straight Length table, the maximum length without transitions and elbows is 60 feet.
■■ The equivalent length of each 90° elbow is 15 feet. ■■ The equivalent length of 45° elbow is 2 feet.
■■ The equivalent length of the transition is 4 feet.■■ The total equivalent length of the above components is: 15 feet + 15 feet + 4 feet + 2 feet = 36 feet.
■■ The maximum amount of straight duct that can be used with a REMP16 and the above components is: 60 feet - 34 feet = 24 feet.
Equivalent Number of Feet -Duct Elbows and Transitions45° elbow | 3 feet | 3 ¼” X 10 | 7 feet | |
8 Inch | 45° elbow | |||
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45° elbow | 2 feet | 3 ¼” X 10 | 15 feet | |
10 Inch | 90° elbow | |||
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90° elbow | 7 feet | 3 ¼” X 10 | 20 feet | |
8 Inch | 90° flat elbow | |||
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90° elbow |
| 3 ¼” X 10 |
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5 feet | to 8” round | 4 feet | ||
10 Inch” | ||||
| transition |
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90° 3 ¼” X 10 to 8” |
| 3 ¼” X 10 |
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round | 25 feet | to 10” round | 4 feet | |
transition |
| transition |
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Roof cap | * | Wall cap | * |
*The equivalent lengths of roof and wall caps vary with model and configuration. For equivalent length, contact the manufacturer or a qualified HVAC specialist.
Duct Size |
| Blower Maximum Duct Straight Length |
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Used | REMP3 Remote Blower | REMP16 Remote Blower | ILHSF8 | ILHSF10 |
8 inch | 50 feet (15.2 meters) | 60 feet (18.3 meters) | 50 feet (15.2 meters) | 60 feet (18.3 meters) |
10 inch | 40 feet (12.2 meters) | 70 feet (21.3 meters) | 40 feet (12.2 meters) | 70 feet (21.3 meters) |
3 ¼” X 10” | 40 feet (12.2 meters) | 60 feet (18.3 meters) | 40 feet (12.2 meters) | 60 feet (18.3 meters) |
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All specifications subject to change without notice. | www.dacor.com | Phone: (800) |