Space-Ray PCA-SS 100, Assembly, Installation And Operation Instructions, Page: 38 / 62

Form 43343110
May 2021
-37-
14.0) VENTING
This is a category lll appliance.
A. BASIC FLUE VENTING — Venting must comply with the latest edition of the National Fuel Gas Code (ANSI
Z223.1-latest edition) or the authority having jurisdiction. Other venting references are in the equipment
volume of the ASHRAE Handbook.
Model
Heat
exchanger
length ft
Maximum vent length ft.
(4” diameter)
Maximum Fresh air
intake length ft (4”
diameter)
Max. combination of
fresh air and vent ft.
(4” diameter)
PCA-SS 75 20 45 50 75
PCA-SS 75 30 35 40 65
PCA-SS 100 30 45 50 75
PCA-SS 100 40 35 40 65
PCA-SS 125 30 60 50 75
PCA-SS 125 40 50 40 65
PCA-SS 125 50 40 30 55
PCA-SS 150 40 60 50 75
PCA-SS 150 50 50 40 65
Note:
1.
Vent lengths shown in the table are for horizontal and vertical venting. If a longer length of vertical or
horizontal venting is required contact the manufacturer for assistance with vent sizing.
2. Vent cannot be used with the Cold air stopper accessory.
3. Cold air stopper is only for use with fresh air intake assembly PN 44129500.
When installing a Defender series heater into a barn with stalls or partitions, we
recommend using a 40 ft. unit or shorter. This is due to the natural characteristic
of all tube heaters. Which is they have a significant temperature drop past 40 ft.
of tube.