KeepRite G96VTN - Page 10

F96VTN and G96VTN: Installation, Start-up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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Table 3 – Minimum Free Area Required for Each Combustion Air Opening or Duct to Outdoors
EXAMPLES: Determining Free Area
Table 4 – Minimum Space Volumes for 100% Combustion, Ventilation and Dilution Air from Outdoors
NP = Not Permitted
L12F012
Fig. 6 – Air for Combustion, Ventilation, and Dilution for Outdoors
L12F013
Fig. 7 – Air for Combustion, Ventilation, and Dilution from Indoors
FURNACE INPUT
(BTUH)
TWO HORIZONTAL DUCTS
(1 SQ. IN./2,000 BTUH)
(1,100 SQ. MM/KW)
SINGLE DUCT OR OPENING
(1 SQ. IN./3,000 BTUH)
(734 SQ. MM/KW)
TWO OPENINGS OR
VERTICAL DUCTS
(1 SQ. IN./4,000 BTUH)
(550 SQ. MM/KW)
Free Area of
Opening and Duct
Sq. In (Sq. mm)
Round Duct
In. (mm) Dia
Free Area of
Opening and Duct
Sq. In (Sq. mm)
Round Duct
In. (mm) Dia
Free Area of
Opening and Duct
Sq. In (mm)
Round Duct
In. (mm) Dia.
40,000
*
*. Not all families have these models.
20 (12904) 5 (127) 14 (8696) 5 (127) 10 (6452) 4 (102)
60,000
30 (19355) 6 (152) 20 (13043) 5 (127) 15 (9678) 5 (127)
80,000
40 (25807) 7 (178) 27 (17391) 6 (152) 20 (12904) 5 (127)
100,000
50 (32258) 8 (203) 34 (21739) 7 (178) 25 (16130) 6 (152)
120,000
60 (38709) 9 (229) 40 (26087) 7 (178) 30 (19355) 6 (152)
140,000*
70 (45161) 10 (254) 47 (30435) 8 (203) 35 (22581) 7 (178)
FURNACE WATER HEATER TOTAL INPUT
100,000 + 30,000 = (130,000 divided by 4,000) = 32.5 Sq. In. for each two Vertical Ducts or Openings
60,000 + 40,000 = (100,000 divided by 3,000) = 33.3 Sq. In. for each Single Duct or Opening
80,000 + 30,000 = (110,000 divided by 2,000) = 55.0 Sq. In. for each two Horizontal Ducts
OTHER THAN FAN-ASSISTED TOTAL
(1,000’S BTUH GAS INPUT RATE)
FAN-ASSISTED TOTAL
(1,000’S BTUH GAS INPUT RATE)
ACH
30 40 50 40 60 80 100 120 140
Space Volume Ft3 (M3)
0.60
1,050 (29.7) 1,400 (39.6) 1,750 (49.5) 1,400 (39.6) 1,500 (42.5) 2,000 (56.6) 2,500 (70.8) 3,000 (84.9) 3,500 (99.1)
0.50
1,260 (35.6) 1,680 (47.5) 2,100 (59.4) 1,680 (47.5) 1,800 (51.0) 2,400 (67.9) 3,000 (84.9) 3,600 (101.9) 4,200 (118.9)
0.40
1,575 (44.5) 2,100 (59.4) 2,625 (74.3) 2,100 (59.4) 2,250 (63.7) 3,000 (84.9) 3,750 (106.1) 4,500 (127.3) 5,250 (148.6)
0.30
2,100 (59.4) 2,800 (79.2) 3,500 (99.1) 2,800 (79.2) 3,000 (84.9) 4,000 (113.2) 5,000 (141.5) 6,000 (169.8) 7,000 (198.1)
0.20
3,150 (89.1) 4,200 (118.9) 5,250 (148.6) 4,200 (118.9) 4,500 (127.3) 6,000 (169.8) 7,500 (212.2) 9,000 (254.6) 10,500 (297.1)
0.10
6,300 (178.0) 8,400 (237.8) 10,500 (297.3) 8,400 (237.8) 9,000 (254.6) 12,000 (339.5) 15,000 (424.4) 18,000 (509.2) 21,000 (594.1)
0.00
NP NP NP NP NP NP NP NP NP
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