Space-Ray LTU Series Installation And Operation Instructions Manual page 43

Multiple Heater Horizontal Venting Arrangement
Multiple Heater Venting (Connections into a Manifold)
LTU40-50
LTU60-75
LTS/U80-100
LTS/U110-130
LTS/U140-175
LTS/U180-200
LTS/U225-250
THE ABOVE ILLUSTRATIONS AND TABLE OF VENT SIZES FOR COMMON VENTING OF MULTIPLE HEATERS ARE IN
ACCORDANCE WITH THE NATIONAL FUEL GAS CODE ANSI Z223.1-LATEST EDITION, NFPA 54-LATEST EDITION, EQUIPMENT
VOLUME OF 1988 ASHRAE HANDBOOK, CURRENT CAN/CGA-B149.1/2-M86 INSTALLATION CODE, AND AGA PUBLICATION
NO. 10M5.85 2.5-2 ON FUNDAMENTALS OF GAS APPLIANCE VENTING AND VENTILATION-REVISED BUT ARE NOT A PART OF
THE CSA CERTIFICATION.
VENT SIZING TABLE VENT SIZING VENT SIZING VENT SIZING TABLE TABLE — — — — Multiple Heater Venting TABLE
1 1 1 1 2 2 2 2
4" 4"
4" 5"
4" 6"
4" 6"
4" 6"
6" 8"
6" 9"
COMMON VENT DIAMETER COMMON VENT DIAMETER
COMMON VENT DIAMETER COMMON VENT DIAMETER
(If a size is not available use the next larger size.)
-42-
Multiple Heater Venting Multiple Heater Venting Multiple Heater Venting
Number of Heaters Number of Heaters
Number of Heaters Number of Heaters
3 3 3 3
5"
6"
6"
7"
8"
9" 10"
10" 11"
4 4 4 4 5 5 5 5
5" 6"
6" 7"
7" 8"
8" 9"
9" 10"
11"
12"
Form #43155010
Sept 2011