304
CHIMNEYS
AND H E A T I N G
EQUIPMENT
CHE-I
Report of Committee on
Chimneys and Heating Equipment
H . E. K u h l m a n , Chairman,
O k l a h o m a I n s p e c t i o n B u r e a u , P. O. B o x 559, O k l a h o m a City, O k l a . 73101
W a r r e n M. A p g a r , Secretary,
A m e r i c a n I n s u r a n c e A s s n . , 85 J o h n St., N e w Y o r k , N. Y. 10038
John BeUein, M a r y l a n d F i r e U n d e r writers Rating Bureau.
C. E. B l o m e , G a s A p p l i a n c e M a n u f a c turers Assn.
Lt. William Carpenter, Fire Marshals
A s s n . of N o r t h A m e r i c a .
Ralph Cramer, AGA Laboratories.
Kendall H. Flint, Gas Vent Institute.
C l i f t o n P . Crelsert, W e s t e r n A c t u a r i a l
Rureau.
R o b e r t C. H a u f l e r , L i b e r t y M u t u a l I n s u r a n c e Co.
H u g h H l g g i n s , N'ationtd Oil F u e l I n stitute.
D a v i d S. M a r t i n , U n d e r w r i t e r s ' L a b o r a t o r i e s of C a n a d a .
E r n e s t R . Menoid, S h e e t M e t a l & A i r
Conditioning Contractors' National
Assn.
D e a n O l d s , I n s t i t u t e of A p p l i a n c e
Manufacturers.
Anthony ]g. O ' N e i l l , T h e T r a v e l e r s I n s u r a n c e Cos.
Joseph F . Sehulz, I n c i n e r a t o r I n s t i t u t e of A m e r i c a .
R o s s AL W . , S w i t z e r , D o m i n i o n F i r e
Commissioner, Canada.
R. H. Zelinske, Underwriters' Laboratories, Inc.
Alternates.
M i r o D v i r k s . I n c i n e r a t o r I n s t i t u t e of
America.
( A l t e r n a t e to J o s e p h F.
Schul~)
J. J. Fannon, Maryland Fire Underwriters Rating .Bureau. (Alternate
9 to J o h n B e t l e i n . )
M. J . R e e d , N a t i o n a l O11 F u e l I n s t i t u t e . ( A l t e r n a t e to H u g h H i g g l r m . )
W . ]EL S a r n o , A m e r i c a n G a s A s s o c i a tion. (Alternate to Ralph Cramer.)
J.H.
Witte, Underwriters' Laborat o r l e s , Inc.
( A l t e r n a t e to It. H ,
Zelinske.)
StoPs: T o p r e p a r e fire p r o t e c t i b n s t a n d a r d s o n c h i m n e y s , f i r e p l a c e s , h e a t i n g
appliance venting systems, incinerators, and similar heat producing or heat
r e m o v a l devices, i n c l u d i n g c l e a r a n c e s b e t w e e n h e a t ' s o u r c e s a n d c o m b u s t i b l e
materials.
Thisreport has been submitted to letter ballot of the Committee
which consists o[ 17 voting members, of whom 15 have voted affirmatively on Part 1, 16 affirmatively on Parts 2 and 3. Mr.'Cramer
has voted negatively on Items 2 and 8 of Part 1. Mr. Olds has not
returned his ballot as of the date o[ this printing.
The Committee on Chimneys and Heating Equipment presents
amendments to three of the NFPA documents under its jurisdiction.
The proposed amendments are pr~seiiiecl in three parts as follows:
Part I recommends for official adoption amendinents to NFPA
No. 211, Standard for Chimneys, Fireplaces and Venting Systems,
1966.
Part II involves some proposed amendments to NFPA No. 89M,
Manual on. Clearances for Heat Producing Appliances, 1966. Since
89M is a manual no official action by the Association is required.
Part III proposes new definitions and amendments to existing.
definitions in NFPA No. 97M, Standard Glossary of Terms Relating
305
CHE-2
AMENDMENTS
TO
NFPA
NO.
211
to Chimneys, Gas Vents and Heat Producing Appliances, 1966. Since
~7M is a manual no official action by the Association is required.
NFPA No. 211, 89M and 97M are published in Volume 4 of the
National Fire Codes and in separate pamphlet form.
Part I
Proposed Amendments to NFPA Standard for
Chimneys, Fireplaces, and Venting Systems
NFPA NO. 211-1966
I.
Add to end o[ paragraph under 50:
and the manufacturer's instructions.
~. Add a new 701.A to read:
A. Single wall metal chimneys shall not be used inside 1- and
2-family dwellings.
3. Change present 701.A., B., and C. to 701.B., C., and D., retpective.ly.
4. Add the word "Ctype'" after the word "'residential" in the heading of 702 and in the first line of 702.A.I., 702.A.2., 702.B.1.a.,
and 702.B.2.d and e.
5.
Add to end o[ 702.B.2.b.:
but in no case shall it be less than 12 inches.
6.
Delete second sentence 802.A and revise first sentence to read:
A. Connectors shall be made of noncombustible corrosion resistant material such as steel or refractory masonry capable of withstanding the flue gas temperatures produced by the appliances and
of sufficient thickness to withstand physical damage.
306
C H I M N E Y S AND HEATING E Q U I P M E N T
CHI:~-,~
7. Revise note of 802.A by inserting "'residential type and lot
heat" ahead of "appliances" in first sentence, and changing "'PaTo
graph B'" in second sentence to read "'Paragraphs B, C, and D."
8.
Add new 802.B., C., and D. to read:
B. Metal connectors for medium heat appliances and commev
cial and industrial incinerators shall be constructed of steel n(l
lighter than that designated for metal chimneys in 701.B. In addi
tion, they shall be lined with fire brick not less than 2 ~ inche
thick, when they are more than 12 inches but not in excess of Ii
inches in diameter o r greatest dimension, and with fire brick no
less than 4 ~ inches thick when they are over 18 inches in diamete~
or greatest dimension. Fire brick shall be laid in high temperatul,
cement or fire-clay mortar.
Chimney connectors for appliances specially constructed to p,'0
duce low flue gas temperatures, and chimney connectors not over
10 inches in diameter and not over 8 feet long, may be of flue tilt
properly supported and insulated, or of other suitable constructlot~
without fire brick lining where located entirely within the appl~,
ance room.
C. Metal connectors for high heat appliances shall be con.
strutted of steel not lighter than that designated for metal chimneyb
in 701.B.
In addition, they shall be lined with fire brick not less than 4y#
inches thick, laid in high temperature cement or fire-clay mortar~
D. Masonry connectors or breechings shall be made of refine.
tory material equivalent in resistance to heat and corrosion to high.
duty regular type ( A S T M Classification C 27-60) fire-clay b,',eh
4 ~ inches thick.
9.
Change present 802.B. and C. to 802.E. and F. respectivel),
10.
Revise third sentence of 803 to read:
The horizontal run of an uninsulated connector to a natural dral'|
chimney, or vent, serving a single liquid or solid fuel burning applb
ante, shall not be more than 75 percent of the .height of the vertir
portion of the chimney or vent above the connector, unless part d
an engineered venting system.
I1.
Add new sentences to 803 to read as [oUows:
The horizontal run of an insulated connector to a natural draft
~:I.IE-4
307
AMENDMENTS
TO NFPA
NO. 211
<hirnney, or vent, serving a single gas fuel fired appliance shall be
r:0t more than 100 percent of the height of the vertical portion of
Qlle chimney or vent above the connector, unless part of an engi0leered venting system. The horizontal length, design, and construe~i0n of combined connectors, or connectors to a manifold joining
Iwo or more appliances to a chimney or vent shall be determined
ltl accordance with approved engineering methods.
12.
A d d to end o[ 807.B.:
nor through a fire wall or fire partition.
13.
Revise 807. Table 1 as follows:
a. Under
"l!urner" and
qlnder "Type
"Burner" and
b.
"Single-Wall Metal Pipe Connectors" make words
"Hood" plural in fourth, fifth, and sixth lines; and
L Venting System Piping Connectors" make words
"-Hood" plural in fifth and sixth lines.
Insert word "TYPE"
in headings to read as follows:
'RESIDENTIAL TYPE APPLIANCES" and " C O M M E R C I A L INDU'STRIAL TYPE APPLIANCES."
14.
A d d a new 905.C. to read:
C. Additional requirements for the installation of venting sysle, ns serving gas appliances appear in Part V, Venting of Appliances, of Standard for Gas Appliances and Gas Piping, NFPA No. 54.
15.
Revise 906A to read as [ollows:
A. Sealed Combustion System Appliances. Sealed combustion
tystem appliances shall be listed and shall be installed in accordance
with their listings and the manufacturer's instructions.
16.
Revise A p p e n d i x A as ]ollows:
APPENDIX A
0
O0
Chimney Selection Chart
Chimneys for
Residential Type
Appliances
Chimneys for LOW HEAT Appliances
Building Heating
Appliances
1. Factory built (low heat).
2. Masonry (residential). 4
Column I
A. Residential type appliances,
such as:
1. Ranges.
2. Warm air furnaces.
3. Water heaters.
4. Hot water heating
boilers.
5. Low pressure steam
heating boilers (not
over 15 psig).
6. Domestic incinerators.
7. Floor furnaces.
8. Wall furnaces.
9. Room heaters.
10. Fireplace stoves9
B. Fireplaces.
1. Factory built (low heat).
. Masonry (low heat type). ~
9 Metal (smokestack).5
Chimneys for
MEDIUM HEAT
AppliancesI
Chimneys for
HIGH HEAT
Appliances~
Industrial Type
Low Heat Appliances
1. Factory Built (industrial
low heat type),
2. Masonry (low heat type). 4
3. Metal (smokestack),5
I. Factory built (medium
heat type).
2. Masonry (medium heat
type).'
3. Metal (smokestack). 6
TYPES OF APPLIANCES TO BE USED WITH EACH TYPE CHIMNEY
Column II
Column III
Column IV
All appliances shown in
All appliances shown in
A. All appliances shown in
Columns I and II, and apColumns I, II and III, and
Column I.
plianc~s such as:
appliances= such as:
B. Nonresldentlal type build1. Annealing baths for
1. Alabaster gypsum kilns.
ing heating appliances
hard
glass
(fats,
paraf2. Anneallngfurnaoes(gless
for heating a total volfine, salts, or metals),
or metal).
ume of space exceeding
2. Bake ovens (in bakeries).
3. Charcoal furnaces.
25,000 cubic feet.*
3. Boiling vats, for wood
4. Cold stirring furnaces.
C. Steam boilers operating
fibre, straw, lignin, eta.
5. Feed driers (direct fire
at not over 50 lb. per
4. Candy furnaces,
heated).
sq. in. gage pressure;
5. Coffee masting ovens.
6. Fertilizer driers (direct
pressing machine boilers.
6. Core ovens,
fire heated).
7. Cruller furnaces.
7. Galvanizing furnaces.
8. Feed drying ovens.
8. Gas producers.
9. Fertilizer drying ovens.
9. Hardening furnaces
10. Fireplaces, other than
(cherry to pale red).
residential type.
10. Incinerators, commercial
I h Forge furnaces (solid
and industrial type.
fuel).
11. Lehrs and glory holes.
12. Gypsum kilns.
12. Lime kilns.
13. Hardening furnaces (be13. Linseed oil boiling furlow dark red).
neces.
14. Hot air engine furnaces.
14. Porcelain biscuit kilns.
15. I . ~ e ~y=.--.,%~~
IS. Pu~ cb~r~ C~.'~c~
1. Masonry (high heat type). 4
2. Metal (smokestack).6
u~
>
Column V
All appliances shown in
Columns I, II, III, and IV
and appliances such as:
1. Bessemer retorts.
2. Billet and bloom furnaces.
3. Blast furnaces.
4. Bane calcining furnaces.
5. Brass furnaces.
6. Carbon point furnaces.
7. Cement brick and tile
kilns.
8. Ceramic kilns.
9. Coal and water gas retorts.
10. Cupolas.
11. Earthenware kilns.
12. Glass blow furnaces.
13. Glass furnaces (smelting).
14. Glass kilns.
15. Open hearth furnaces.
16. Ore roasting furnaces.
17. Pr~l.~-~ ~.ILE~'~g
M
;>
C~
C
Z
APPENDIX A
Chimney Selection Chart
Chimneys for
Residential Type
Appliances
Chimneys for LOW HEAT Appliances
Building Heating
Appliances
1. Factory built (low heat).
2. Masonry (residential). 4
industrial Type
Low Heat Appliances
1. Factory built (medium
heat type).
2. Masonry (medium heat
type). 4
3. Metal (smokestack).~
TYPES OF APPLIANCES TO BE USED WiTH EACH TYPE CHIMNEY
Column III
Column IV
16. Steam boiler:~ operating
17. Nickel plate (drying)
furnaces.
at over 50 lb. per sq.
18. Para~ne furnaces.
in. gage pressure ex19. Recuperative furnaces
cept pressing machine
(spent materials).
boilers.
20. Rendering furnaces.
17. Water-glass kiln.
21. Restaurant type cooking
18. Wood-distilling furnaces.
appliances~ using solid
19. Wood-gas retorts.
or liquid fuel.
22. Rosin melting furnaces.
23. Stereotype furnaces.
24. Sulphur furnaces.
25. Tripoli kilns (clay, coke
and gypsum).
26. Type foundry furnaces.
27. Wood drying furnaces.
28. Wood impregnating furnaces.
29. Zinc amalgamating furnaces,
1. Factory built (low heat).
2. Masonry (low heat type). 4
3. Metal (smokestack).a
Chimneys for
HIGH HEAT
Appliancesu
Chimneys for
MEDIUM HEAT
Appliances:
1. Factory Built (industrial
low heat type).
2~ Masonry (low heat type).4
Metal (smokestack).~
I. Masonry (high heat type). 4
9 Metal (smokestack).n
Column V
Pot-arches9
Puddling furnaces.
Regenerative furnaces.
Reverberatory furnaces.
Stacks, carburetor or
superheating
furnaces
(in water gas works).
23. Vitreous enameling
ovens (ferrous metals).
24. Wood carbonizing furnaces.
18.
19.
20.
21,
22.
0
31.()
CHIMNEYS
17.
AND
HEATING
EQUIPMENT
CHF.
Revise Appendix B as [ollows:
Delete "Metal Pipe" and "(Round or Oval)" from heading
Cohtmn I.
18. Add new Appendix D as [ollows and re/erence in 40., 602.1t
603.B., 702.A.I., and 903.
APPENDIX D
2"MIN.
~
I
l
E
ill
i
I
I
[ 2"M,N.
' :-:l--'-
LESS THAN
i
il
!
I
I0"~-~
CHIMNEY 3" MIN.
GAS V(NT OR
TYPE L VENT
9 MIN-
I ',l - f N ----t
I
, I,I
I~~::~:i :~<":.-~,~:-~:~'~<::'~::::~:~::~l
i
-.~
~'V~
J~
I
/ CAS VE.T OR
/ TYPE L VENT
PARAPET
CHIMNEY
J
OR VENT - - ~
Termination less than 10 feet from ridge, wall or parapet.
311
: IF,-8
AMENDMENTS
NFPA
TO
NO.
211
II,-~MOR( "THAN I0'-----~
I
l.I.
II
/~j,,'~
~ /
'
~
~f
9
"
T
~ " ~
"
-.~!
--~
|CHIMNEY
| GAS V E N T
I
I
'
l TVP(
3"
MIN.
OR
L VENT
.
,,.%
MORE 'THAN IO'.~
CHIMNEY •l MIN,-y'-~
GAS VENT OR
~--T-
TYPE
L VENT
I
I!
q
, f:.'~:..:..~,,::
~.:'.:
~-:.~ NOT E :
} ' '~
~NO HEIGHT
,
i ABOVE
.
~1
wilE,,, ~,,~.ANE~.O"
~!j
WALL, O,,,,,,~T
~ t 5
MORE THAN
I0"
gV""
/
:HIMNEY OR VENT
WALL OR PARAPET
-Termination more than 10 feet from rldge, wall or parapet.
312
CHIMNEYS
AND H E A T I N G
EQUIPMENT
C H F.~'
Part II
Proposed Amendments to Manual on
Clearances for Heat Producing Appliances
NFPA NO. 89M-1966
1. Delete last two columns of Table 1 which are presently titl,
"Chimney Connector" and " V e n t Connector" and delete N o t e '
renumbering Notes 6 to 11 inclusive to 5 to 10 inclusive.
2. Insert Table 1 of N F P A Standard No. 211 as T a b l e 2, as i~
vised (see Part I, this Report, I t e m 13).
3.
R e n u m b e r Tables 2, 3, and 4 as Tables 3, 4, and 5.
r
313
AMENDMENTS TO NFPA NO.
97M
Part III
Proposed Amendments to NFPA Standard G!ossary of
Ts
RELATING T O CHIMNEYS, GAS VENTS AND
HEAT PRODUCING APPLIANCES
NFPA No.
97M
~
1966
|, Add new definition of Building Heating Appliances to read:
Ihtilding H e a t i n g Appliances. Fuel burning and electric boilers
,pcrating at not over 20 psig pressure, central furnaces, and heaters
intended primarily .for heating spaces having volume exceeding
~]S,000 cubic feet.
~. Add new definition of Fire Partition to read:
Fire Partition. A partition which serves to restrict the spread of
(ire and is required to have a standard fire resistance rating of not
lt~ than two hours, but does not qualify as a fire wall.
3. Add new definition of Fire Wall to read:
Fire Wall. A wall
~tability under fire
~letely subdividing
mildings to restrict
I
having adequate fire resistance and structural
conditions to accomplish the purpose of coma building or completely separating adjoining
the spread of fire.
4. Revise definition of Low-Heat Industrial Appliance to read:
a . L o w - H e a t Industrial Appliance.
An industrial appliance
luch as a commercial cooking range, pressing machine boiler at
any pressure, bake oven, candy furnace, stereotype furnace, drying
~nd curing appliance, and other process appliances in which materials are heated or melted at temperatures (excluding flue-gas
temperatures) not exceeding 600~
Appliances otherwise classed
~ medium-heat appliances may be considered as low-heat appliances if not larger than 100 cubic feet in size excluding any burner
equipment and blower c9mpattment.
314
CHIMNEYS
AND HEATING
EQUIPMENT
CHE- I i
5. Revise definition of Medium-Heat Industrial Appliance to read:
b. M e d l u m - H e a t Industrial Appliance.
An industrial appli.
ance such as an annealing furnace (glass or metal)', charcoal furnace,
galvanizing furnace, .gas producer, commercial or industrial in.
cinerator, and steam boiler operating at over 50 psig pressure when
such appliance is larger than 100 cubic feet in size, and other furnaces classified as medium-heat appliances in accordance with nationally recognized good practice. Appliances otherwise classed as
medium-heat appliances may be considered as low-heat applianceA
if not larger than 100 cubic feet in size excluding any burner equipment and blower compartment.
6. Revise definition of Residential- Type Appliance to read:
R e s l d e n t l a l - T y p e Appliance. Fuel-burning and electric heating
appliances, except high pressure steam boilers, for heating building spaces having a volume of not more than 25,000 cubic feet and
other heat producing appliances of the type mainly used in residences, but which may be used in other buildings, such as cooking
stoves and ranges, clothes dryers, fireplace stoves, domestic in.
cinerators, laundry stoves, water heaters, and heat pumps.