Table of Contents
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MFC Series Boiler Vent and Combustion Air Guide
Table of Contents
1.
General ............................................................................................................................. 3
2.
Approved Vent Materials ................................................................................................... 3
3.
Code Required Vent Terminations .................................................................................... 4
4.
Combustion Air Supply ...................................................................................................... 5
4.1 Combustion Air from WITHIN the Building .................................................................. 6
4.2 Combustion Air from OUTSIDE the Building .............................................................. 7
4.3 Two-Permanent-Openings Method (USA Only) ......................................................... 7
4.4 One Permanent Opening Method .............................................................................. 9
4.5 Opening a Louver Through the MFC Series Boiler .................................................... 9
5.
Direct Vent/Ducted Combustion Air ................................................................................ 10
5.1 Optional Air Intake Adapters .................................................................................... 10
6.
Exhaust Vent and Combustion Air Systems ................................................................... 12
7.
Gross Natural Draft ......................................................................................................... 12
8.
Acceptable Pressure Ranges .......................................................................................... 12
9.
Exhaust Fans .................................................................................................................. 12
10.
Corrections for Altitude .................................................................................................... 13
11.
Manifolded Systems ........................................................................................................ 13
12.
Elbow Quantity and Separation ....................................................................................... 13
13.
Exhaust Muffler And Air Inlet Attenuator Guidelines ....................................................... 13
14.
Vent and Combustion Air System Design Requirements ................................................ 14
15.
Condensate Removal ...................................................................................................... 14
16.
Individually Vented Systems ........................................................................................... 15
16.1 MFC Series Pressure Drop Calculation Example .................................................. 15
17.
Manifolded Ducted Combustion Air ................................................................................. 17
18.
Common Vent Breeching (Manifolded) ........................................................................... 19
19.
Pressure Drop and Draft Data Tables ............................................................................. 21
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