Watts Aerco INN1060, Manual

Page: 2 / 39

GF-5050
Innovation Series & ReCon Water Heater
TAG-0043_0Q
Venting and Combustion Air Guide
Page 2 of 39 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288 12/01/2016
Table of Contents
1. CODES, SAFETY & VENTING SYSTEMS ................................................... 3
1.1. Introduction................................................................................................................... 3
1.2. Applicable Federal Codes ............................................................................................. 3
1.3. Gas Vent Categories .................................................................................................... 4
1.4. Certified Venting Materials for Flue Pipe Systems ........................................................ 5
1.5. Exhaust Vent Connection Components ........................................................................ 7
1.6. PRESSURE RANGE .................................................................................................... 7
1.7. EXHAUST MUFFLER GUIDELINES ............................................................................ 8
1.8. EXHAUST FANS .......................................................................................................... 8
1.9. Elbow Quantity and Separation .................................................................................... 8
2. COMBUSTION AIR SYSTEM ..................................................................... 9
2.1. Combustion Air Requirements ...................................................................................... 9
2.2. Combustion Air from WITHIN the Building .................................................................. 10
2.3. Combustion Air from OUTSIDE the Building ............................................................... 11
2.3.1. Two-Permanent-Openings Method (USA Only) ............................................... 11
2.3.2. One Permanent Opening Method .................................................................... 13
2.4. Combustion Air Pipe Sizing ........................................................................................ 15
2.5. Common Combustion Air Systems ............................................................................. 16
3. VENT SYSTEM ........................................................................................ 19
3.1. Vent Installation .......................................................................................................... 20
3.2. Installation Procedure for Venting System Through a Wall ......................................... 22
3.3. Installation Procedure for Vertical Venting .................................................................. 24
3.4. Vent Pipe Sizing * ....................................................................................................... 25
3.5. Common Vent Pipe Sizing .......................................................................................... 25
3.6. Common Vent CONDENSATE DRAINAGE................................................................ 27
3.7. Combustion Air Duct Pressure Drop Tables ............................................................... 28
3.8. Flue Vent Pressure Drop Tables ................................................................................. 36