Government of Canada / Gouvernement du Canada
Symbol of the Government of Canada

Search

Multi-Sector Air Pollutants Regulations (SOR/2016-151)

Regulations are current to 2020-10-05 and last amended on 2020-09-21. Previous Versions

PART 1Boilers and Heaters (continued)

Main Requirements

Marginal note:Modern boilers

  •  (1) Subject to section 10, the NOx emission intensity of a modern boiler that, for a given hour, has at least 50% of the input energy in its combustion chamber resulting from the introduction of gaseous fossil fuel set out in column 1 of the table to this subsection and that has a thermal efficiency set out in column 2 must not, for that hour, exceed the limit set out in column 3.

    TABLE

    Modern Boilers — NOX Emission Intensity Limits

    Column 1Column 2Column 3
    ItemGaseous Fossil FuelThermal EfficiencyNOx Emission Intensity Limit (g/GJ)
    1Natural gas< 80%16
    2Natural gas≥ 80% and ≤ 90%16 + (E – 80)/5, where E is the thermal efficiency of the boiler
    3Natural gas> 90%18
    4Alternative gas< 80%20.8
    5Alternative gas≥ 80% and ≤ 90%20.8 + (E – 80)/4.54, where E is the thermal efficiency of the boiler
    6Alternative gas> 90%23
  • Marginal note:Thermal efficiency

    (2) For the purpose of subsection (1), the thermal efficiency of a modern boiler for the given hour

    • (a) if there has been a determination made in accordance with section 18, is the result of the most recent such determination; and

    • (b) in any other case, is deemed to be less than 80%.

Marginal note:Modern heaters

  •  (1) Subject to section 10, the NOx emission intensity of a modern heater — that, for a given hour, has at least 50% of the input energy in its combustion chamber resulting from the introduction of gaseous fossil fuel set out in column 1 of the table to this subsection and that has a difference between the temperature of its preheated air and the ambient air set out in column 2 must not, for that hour, exceed the limit set out in column 3.

    TABLE

    Modern Heaters — NOX Emission Intensity Limits

    Column 1Column 2Column 3
    ItemGaseous Fossil FuelDifference between Temperature of Preheated Air and Ambient Air (°C)NOx Emission Intensity Limit (g/GJ)
    1Natural gas016
    2Natural gas> 0 and ≤ 15016 × [1 + (2 x 10-4T) + (7 x 10-6T2)], where T is the difference, expressed in °C, between the temperature of its preheated air and the ambient air
    3Natural gas> 15019
    4Alternative gas020.8
    5Alternative gas> 0 and ≤ 15520.8 × [1 + (2 x 10-4T) + (7 x 10-6T2)], where T is the difference, expressed in °C, between the temperature of its preheated air and the ambient air
    6Alternative gas> 15525
  • Marginal note:Preheated air

    (2) For the purpose of subsection (1), the difference between the temperature of a modern heater’s preheated air and the ambient air, expressed in °C, for the given hour

    • (a) if there has been a determination of that difference made in accordance with section 24 within the previous 12 months, is the result of the most recent of such determination; and

    • (b) in any other case, is deemed to be 0°C.

Marginal note:Determination of type of gaseous fossil fuel

 For the purpose of determining the type of gaseous fossil fuel — natural gas or alternative gas — introduced into the combustion chamber of a boiler or heater, the percentage of methane in the fuel must be determined in accordance with section 16.

Marginal note:Transitional boilers and heaters

 The NOx emission intensity of a transitional boiler or heater that, for a given hour, has at least 50% of the input energy in its combustion chamber resulting from the introduction of gaseous fossil fuel must not, for that hour, exceed the following limit:

  • (a) 26 g/GJ, if the boiler or heater has a rated capacity of at least 10.5 GJ/h and at most 105 GJ/h; and

  • (b) subject to section 10, 40 g/GJ, if the boiler or heater has a rated capacity greater than 105 GJ/h.

Marginal note:Redesigned boilers and heaters — NOx emission intensity

  •  (1) The NOx emission intensity of a redesigned boiler or heater that, for a given hour, has at least 50% of the input energy in its combustion chamber resulting from the introduction of gaseous fossil fuel must not, for that hour, exceed the limit of 26 g/GJ.

  • Marginal note:Redesigned boilers and heaters

    (2) A redesigned boiler or heater is one that

    • (a) on its commissioning date, was not designed to combust gaseous fossil fuel; and

    • (b) after the day on which these Regulations are registered, is redesigned to combust, on its recommissioning date, gaseous fossil fuel.

Marginal note:Class 80 and class 70

 The NOx emission intensity of a pre-existing boiler or heater that is class 80 or class 70 — other than those referred to in subsections 13(1) and 14(1) and (2) — and that, for a given hour, has at least 50% of the input energy in its combustion chamber resulting from the introduction of gaseous fossil fuel must not, for that hour, exceed the limit of 26 g/GJ, as of

  • (a) January 1, 2026, for a class 80 boiler or heater; and

  • (b) January 1, 2036, for a class 70 boiler or heater.

Marginal note:Pre-existing boilers and heaters — classification

  •  (1) A pre-existing boiler or heater is classified — in accordance with its classification NOx emission intensity determined in accordance with subsection 34(1) or 35(1) or redetermined in accordance with subsection 36(1) or 37(1) — as follows:

    • (a) class 80, if its classification NOx emission intensity is determined to be at least 80 g/GJ;

    • (b) class 70, if its classification NOx emission intensity is determined to be at least 70 g/GJ and less than 80 g/GJ; and

    • (c) class 40, in any other case.

  • Marginal note:Before classification — deemed class 80

    (2) A pre-existing boiler or heater — other than a redesigned boiler or heater referred to in subsection 10(2) — that is not classified under subsection (1) is deemed to be class 80 and to have a classification NOx emission intensity of 80 g/GJ.

Marginal note:Major modifications — class 80 and class 70

  •  (1) Subject to section 14, the NOx emission intensity of a class 80 or class 70 boiler or heater that has undergone a major modification before, respectively, January 1, 2026 or January 1, 2036 must not, as of its recommissioning date — for each hour during which at least 50% of the input energy in its combustion chamber results from the introduction of gaseous fossil fuel — exceed the limit of 26 g/GJ.

  • Marginal note:Major modifications

    (2) A major modification is

    • (a) for a boiler or heater with a single burner or double burner, the replacement of a burner;

    • (b) for a boiler or heater that has at least three burners, the replacement, within a period of at most 60 months, of at least three burners;

    • (c) the addition of a burner; or

    • (d) the relocation of a boiler or heater.

 
Date modified: