Sizing Guide

www.hartandcooley.com Sizing Guide 25
2
System
Height, Ft.
Lateral, Ft.
w/ (2) 90° turns
GPH for
6" dia
GPH for
5" dia
GPH for
4" dia
4 0.5-1.0 0.4-0.65 0.25
10 0.4-0.75 NR NR
4 0.65-1.25 0.4-0.75 0.4
10 0.5-1.0 0.4-0.75 0.4
4 0.65-1.5 0.5-0.85 0.4
10 0.65-1.25 0.65-0.85 0.4-0.5
4 0.75-1.5 0.65-1.0 0.5
10 0.85-1.25 0.65-0.85 0.5
4 1.0-1.75 0.75-1.0 0.5
10 1.0-1.5 0.75-1.0 0.5
4 1.25-1.75 0.85-1.0 0.65
10 1.25-1.75 0.85-1.0 0.65
System
Height, Ft.
Lateral, Ft.
w/ (2) 90° turns
GPH for
6" dia
GPH for
5" dia
GPH for
4" dia
4 0.4-1.25 0.4-0.85 0.25-0.5
10 0.4-1.25 0.4-0.75 0.25
4 0.5-1.5 0.4-1.0 0.4-0.5
10 0.5-1.25 0.4-0.85 0.4-0.5
4 0.65-1.75 0.5-1.0 0.4-0.5
10 0.65-1.5 0.5-1.0 0.4-0.5
4 0.75-1.75 0.5-1.0 0.4-0.5
10 0.75-1.75 0.65-1.0 0.4-0.5
4 0.85-2.0 0.65-1.25 0.5-0.65
10 0.85-2.0 0.65-1.25 0.5-0.65
4 1.0-2.25 0.75-1.25 0.65-0.75
10 1.0-2.0 0.85-1.25 0.65-0.75
Chimney Sizing for 88% Steady State Appliances (10-14% CO
2
, 300°F gross)
10
15
20
25
35
40
Chimney Sizing for 86% Steady State Appliances (10-14% CO
2
, 370°F gross)
35
40
GPH (gallons per hour firing rate) * 140,000 = BTU/hr input
NR: Not recommended
Flexible liners: reduce max GPH by 15% due to higher flow losses
Calculations based from draft set at -0.03" of water at appliance outlet
10
15
20
25
GPH (gallons per hour firing rate) * 140,000 = BTU/hr input
NR: Not recommended
Flexible liners: reduce max GPH by 15% due to higher flow losses
Calculations based from draft set at -0.03" of water at appliance outlet
System
Height, Ft.
Lateral, Ft.
w/ (2) 90° turns
GPH for
6" dia
GPH for
5" dia
GPH for
4" dia
4 0.4-1.5 0.25-1.0 0.25-0.5
10 0.4-1.5 0.25-0.85 0.25-0.5
4 0.4-1.75 0.4-1.25 0.25-0.65
10 0.4-1.75 0.4-1.0 0.25-0.65
4 0.5-2.0 0.4-1.25 0.4-0.75
10 0.5-2.0 0.4-1.25 0.4-0.75
4 0.5-2.25 0.5-1.5 0.4-0.75
10 0.65-2.0 0.5-1.25 0.4-0.75
4 0.65-2.25 0.65-1.5 0.5-0.85
10 0.75-2.25 0.65-1.5 0.5-0.85
4 0.75-2.25 0.75-1.5 0.5-0.85
10 0.85-2.25 0.75-1.5 0.5-0.85
System
Height, Ft.
Lateral, Ft.
w/ (2) 90° turns
GPH for
6" dia
GPH for
5" dia
GPH for
4" dia
4 0.25-1.75 0.25-1.0 0.25-0.65
10 0.4-1.5 0.25-1.0 0.25-0.65
4 0.4-2.0 0.4-1.25 0.25-0.75
10 0.5-2.0 0.4-1.25 0.25-0.75
4 0.4-2.25 0.4-1.5 0.4-0.85
10 0.4-2.0 0.4-1.25 0.4-0.75
4 0.4-2.25 0.4-1.5 0.4-0.85
10 0.65-2.25 0.5-1.5 0.4-0.85
4 0.5-2.25 0.5-1.75 0.4-0.85
10 0.65-2.25 0.65-1.5 0.4-0.85
4 0.65-2.25 0.65-1.75 0.5-1.5
10 0.65-2.25 0.65-1.75 0.5-0.85
Chimney Sizing for 82% Steady State Appliances (10-14% CO
2
, 505°F gross)
10
15
20
25
35
40
GPH (gallons per hour firing rate) * 140,000 = BTU/hr input
NR: Not recommended
Flexible liners: reduce max GPH by 15% due to higher flow losses
Calculations based from draft set at -0.03" of water at appliance outlet
Chimney Sizing for 80% Steady State Appliances (10-14% CO
2
, 575°F gross)
10
40
GPH (gallons per hour firing rate) * 140,000 = BTU/hr input
NR: Not recommended
Flexible liners: reduce max GPH by 15% due to higher flow losses
Calculations based from draft set at -0.03" of water at appliance outlet
15
20
25
35
Oil-Fired Appliance Chimney Sizing
(Tables based on steady state efficiency. Content from NFPA 31, 2006 Edition.)
Determining steady state efficiency by AFUE:
- Add 1% to AFUE for hydronic boiler.
- Add 2% to AFUE for warm-air furnace.
System
Height, Ft.
Lateral, Ft.
w/ (2) 90° turns
GPH for
6" dia
GPH for
5" dia
GPH for
4" dia
4 0.4-1.5 0.25-0.85 0.25-0.5
10 0.4-1.25 0.25-0.85 0.25-0.4
4 0.5-1.75 0.4-1.0 0.25-0.65
10 0.65-1.5 0.4-1.0 0.4-0.5
4 0.65-1.75 0.5-1.25 0.4-0.65
10 0.65-1.75 0.5-1.0 0.4-0.5
4 0.65-2.0 0.5-1.25 0.4-0.75
10 0.65-2.0 0.5-1.25 0.4-0.65
4 0.85-2.25 0.65-1.5 0.5-0.75
10 0.85-2.25 0.65-1.25 0.5-0.75
4 1.0-2.25 0.75-1.5 0.65-0.75
10 1.0-2.25 0.75-1.5 0.65-0.75
20
Chimney Sizing for 84% Steady State Appliances (10-14% CO
2
, 440°F gross)
10
15
25
35
40
GPH (gallons per hour firing rate) * 140,000 = BTU/hr input
NR: Not recommended
Flexible liners: reduce max GPH by 15% due to higher flow losses
Calculations based from draft set at -0.03" of water at appliance outlet