The following is part of the table TABLE SB 9.4.2-2–2017 from Ontario building code SB-10 (page 61 of SB-10)
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TABLE SB 9.4.2-2–2017
(Supersedes Table 9.4.2-2 in 2013 ANSI/ASHRAE/IES 90.1)
Individual Lighting Power Allowances for Building Exteriors
Forming Part of Sentences 1.1.1.9.(5) and (6)
Zone 0 Zone 1 Zone 2 Zone 3 Zone 4
Base Site Allowance (base allowance may be used in tradable or non-tradable surfaces)
No allowance 350 W 400 W 500 W 900 W
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It looks to me that based on TABLE B1-4 International Climate Zone Definitions of ANSI/ASHRAE/IES Standard 90.1-2013 (SI Edition), there are no cities in Ontario which fall under Zone 1, Zone 2, Zone 3 or Zone 4.
There are 3 questions:
1. Where to find Zone 0 definition?
2. Is there CDD date in Ontario building code?
3. As I understand, if there is no city in Ontario that would be classified as Zone 1, Zone 2, Zone 3 or Zone 4, why should this table be in Ontario building code?
This is from ANSI/ASHRAE/IES Standard 90.1-2013 (SI Edition):
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TABLE B1-4 International Climate Zone Definitions
Zone Number Name Thermal Criteria
1 Very Hot–Humid (1A), Dry (1B) 5000 < CDD10°C
2 Hot–Humid (2A), Dry (2B) 3500 < CDD10°C < 5000
3A and 3B Warm–Humid (3A), Dry (3B) 2500 < CDD10°C < 3500
3C Warm–Marine CDD10°C <2500 and HDD18°C 2000
4A and 4B Mixed–Humid (4A), Dry (4B) CDD10°C < 2500 and 2000 < HDD18°C < 3000
4C Mixed–Marine 2000 < HDD18°C < 3000
5A, 5B and 5C Cool–Humid (5A), Dry (5B), Marine (5C) 3000 < HDD18°C < 4000
6A and 6B Cold–Humid (6A), Dry (6B) 4000 < HDD18°C < 5000
7 Very Cold 5000 < HDD18°C < 7000
8 Subarctic 7000 < HDD18°C
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TABLE SB 9.4.2-2–2017
(Supersedes Table 9.4.2-2 in 2013 ANSI/ASHRAE/IES 90.1)
Individual Lighting Power Allowances for Building Exteriors
Forming Part of Sentences 1.1.1.9.(5) and (6)
Zone 0 Zone 1 Zone 2 Zone 3 Zone 4
Base Site Allowance (base allowance may be used in tradable or non-tradable surfaces)
No allowance 350 W 400 W 500 W 900 W
--------------------------------------------------------------------------------------------------------------------
It looks to me that based on TABLE B1-4 International Climate Zone Definitions of ANSI/ASHRAE/IES Standard 90.1-2013 (SI Edition), there are no cities in Ontario which fall under Zone 1, Zone 2, Zone 3 or Zone 4.
There are 3 questions:
1. Where to find Zone 0 definition?
2. Is there CDD date in Ontario building code?
3. As I understand, if there is no city in Ontario that would be classified as Zone 1, Zone 2, Zone 3 or Zone 4, why should this table be in Ontario building code?
This is from ANSI/ASHRAE/IES Standard 90.1-2013 (SI Edition):
-----------------------------------------------------------------------------------------------------------------
TABLE B1-4 International Climate Zone Definitions
Zone Number Name Thermal Criteria
1 Very Hot–Humid (1A), Dry (1B) 5000 < CDD10°C
2 Hot–Humid (2A), Dry (2B) 3500 < CDD10°C < 5000
3A and 3B Warm–Humid (3A), Dry (3B) 2500 < CDD10°C < 3500
3C Warm–Marine CDD10°C <2500 and HDD18°C 2000
4A and 4B Mixed–Humid (4A), Dry (4B) CDD10°C < 2500 and 2000 < HDD18°C < 3000
4C Mixed–Marine 2000 < HDD18°C < 3000
5A, 5B and 5C Cool–Humid (5A), Dry (5B), Marine (5C) 3000 < HDD18°C < 4000
6A and 6B Cold–Humid (6A), Dry (6B) 4000 < HDD18°C < 5000
7 Very Cold 5000 < HDD18°C < 7000
8 Subarctic 7000 < HDD18°C
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