OBC 2006 › Division B
12.3.4.5.
Version 0 — in force 31 December 2006
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- Edition
- OBC_2006
- Division
- B
- Provision
- 12.3.4.5.
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- v0
(1) This Regulation comes into force on December 31, 2006.
Read directly from the regulation's own commencement section.
O. Reg. 350/06 · commencement 2.2.1.1(1)
This version stayed in force until the next edition replaced it. What follows is that edition’s base regulation’s commencement — the takeover that ended this one.
(1) Subject to Sentences (2) and (3), this Regulation comes into force on January 1, 2014.
Read directly from the regulation's own commencement section.
O. Reg. 332/12 · commencement 4.4.1.1(1)
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Tell us what is wrong and we will verify & correct our mapping.
- Edition
- OBC_2006
- Division
- B
- Provision
- 12.3.4.5.
- Version
- v0
(1) This Regulation comes into force on December 31, 2006.
Read directly from the regulation's own commencement section.
O. Reg. 350/06 · commencement 2.2.1.1(1)
This version stayed in force until the next edition replaced it. What follows is that edition’s base regulation’s commencement — the takeover that ended this one.
(1) Subject to Sentences (2) and (3), this Regulation comes into force on January 1, 2014.
Read directly from the regulation's own commencement section.
O. Reg. 332/12 · commencement 4.4.1.1(1)
Provenance
New in this edition — no OBC 1997 predecessor
Base · O. Reg. 350/06 · ext← current
Original — base regulation
Content moved to SB-10, not yet covered
12.3.4.5. — Ducts, Plenums and Piping
(1) A duct or a plenum that is not protected by an insulated exterior wall or that is exposed to an unheated space shall be,
(a) sealed to a Class A seal level in accordance with the SMACNA, “HVAC Duct Construction Standards - Metal and Flexible”, to minimize air leakage, and
(b) insulated to provide a thermal resistance of not less than RSI 1.4.
(2) A supply or exhaust duct or plenum that is located in a conditioned space shall be sealed to a Class C seal level in accordance with the SMACNA, “HVAC Duct Construction Standards - Metal and Flexible”, to minimize air leakage.
(3) Except for piping within prefabricated equipment, piping used for steam, hot water heating or cooling shall be insulated in accordance with Table 12.3.4.5.
(4) Insulation exposed to weather shall be protected by a covering such as aluminum, sheet metal, painted canvas or plastic.
(5) An exhaust duct with a design capacity of more than 140 L/s on a heating, ventilating and air conditioning system that does not operate continuously shall be equipped with a gravity or motorized damper that will automatically shut when the system is not in operation.
(6) An air duct distribution system shall be balanced in the following sequence:
1. Minimize throttling losses.
2. If the fan is rated for more than 0.75 kW, adjust the fan speed to meet design flow conditions.
(7) A hydronic system shall be proportionately balanced to minimize throttling losses.
Editor's note
As filed in O. Reg. 350/06, Sentence (5) reads 'air conditioning' without a hyphen (the filing spells it 'air-conditioning' elsewhere), which e-Laws normalizes to the hyphenated form. Also, the caption of Table 12.3.4.5. carries the footnote marker '(1)' right after 'Pipe Insulation', which e-Laws sets as a superscript, raised rather than inline. The meaning is unchanged in both cases, and this map preserves the wording and presentation as filed.
Text · e-Laws consolidated snapshot
Column 1 | Column 2 | Column 3 |
Use of pipe | Nominal pipe size not more than 40 mm | Nominal pipe size more than 40 mm |
Steam | 40 | 50 |
Hot water heating | 25 | 40 |
Domestic hot water | 12 | 25 |
Cooling | 12 | 25 |
Notes to Table 12.3.4.5.:
(1) Insulation material shall have a thermal conductivity of not more than 0.42 W/ m∙°C.
Provenance
New in this edition — no OBC 1997 predecessor
Base · O. Reg. 350/06 · ext← current
Original — base regulation
Content moved to SB-10, not yet covered