OM6003.PUB Page 29 DATE PRINTED: 4/7/11
© Blaze King Industries Canada Ltd June 2006 Version 1.07SIT
The Contemporary by Blaze King Owners Installation and Operation Manual
Equivalent Orifice Sizes at High Altitudes per the current edition of ANSI Z223.1
(Includes 4% input reduction for each 1,000 feet).
In Canada the appliance is certified for use, up to 4500 ft, with a #37 orifice (natural gas) &
#53 orifice (propane).
10,000 / Nat 39# / Prop 55#
9,000 / Nat 39# / Prop 55#
8,000 / Nat 39# / Prop 55#
7,000 / Nat 39# / Prop 55#
6,000 / Nat 38# / Prop 54#
5,000 / Nat 38# / Prop 54#
4,000 / Nat 38# / Prop 54#
3,000 / Nat 37# / Prop 53#
2,000 / Nat 37# / Prop 53#
1,000 / Nat 37# / Prop 53#
SEA LEVEL / Nat 37# / Prop 53#
NATURAL GAS AND PROPANE ORIFICE
REQUIRED AT INCREASED ALTITUDE
THIS CHART IS BASED ON A
CALORIFIC VALUE OF 1000 BTU
FOR NATURAL GAS AND 2500 BTU
FOR PROPANE
Check with your local gas supplier for correct calorific value (btu rating).
High Altitude Chart
HIGH ALTITUDE INSTALLATION
When installing this appliance over 4500 ft (1370 m) above sea level in Canada, the appliance must
b e p r op e r l y d e - r a t ed a n d i n s ta lle d a c c o rd i n g to lo c a l c od e s.
In the absence of local codes in accordance with CSA B149.1, in Canada. In the US for installations
above 2000ft the appliance must be installed in accordance with the current National Fuel Gas
Code, ANSI Z223.1/ NFPA 54.
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