[CCMC 14205-R] CCMC Canadian code compliance evaluation

Footnote 2

The results are based on modeling using NovoFoil® proprietary conductivity-temperature dependant linear fit. This is to simulate the temperature profile of NovoFoil® if the foundation wall assembly had been tested in compliance with ASTM C 1363, “Standard Test Method for Thermal Performance of Building Assemblies by Means of a Hot Box Apparatus” using the same indoor air temperature (21±1°C) and outdoor air temperature (−18±1°C). The manufacturer attested that the product conductivity values can be maintained during the annual production of NovoFoil®.

Table 5. Results of modeling the thermal resistance values for the wall assembly 1
Property	Unit	Requirement	Result
Property	Unit	Requirement	k₁^{Table footnote (1)}	k₂^{Table footnote (1)}
Room-side air temperature	°C	Report value	21	21
Weather-side air temperature	°C	Report value	−18	−18
Thermal resistance of the wall^{Table footnote (2)}^{Table footnote (3)}	(m²·K)/W	Report value	3.06	2.99
Design thermal resistance of the wall^{Table footnote (3)}^{Table footnote (4)}	(m²·K)/W	^{Table footnote (5)}	3.21	3.14

Notes:

Footnote 1

The concrete layer considered in the numerical modeling is 200 mm (8 in.) thick with a density of 2 400 kg/m³ and two possible levels of conductivity of 1.4 W/m·K for k₁ and 2.9 W/m·K for k₂. As per the ASHRAE Handbook, the average conductivity for concrete with a density of 2 400 kg/m³ is 2.2 W/m·K. Excludes room- and weather-side air films.

Footnote 2

Excludes room- and weather-side air films.

Footnote 3

The uncertainty for the numerical heat transfer simulations is estimated at ± 9%.

Footnote 4

This value takes into account the interior and exterior air film conductance data from the ASHRAE Handbook of 8.29 W/m²·K (corresponding resistance is 1/8.29) and 34.00 W/m²·K (corresponding resistance is 1/34.00), respectively. This is the design thermal resistance value to be used for Code compliance.

Footnote 5

For the minimum effective thermal resistance requirements, see Minimum effective design thermal resistance requirements and performance – Article 9.36.2.8. of the NBC 2015.

isometric drawing of assembly 1 — Figure 1. NovoFoil® adjacent to the furred air space assembly installed within the wall assembly 1:

Concrete wall (203.2 mm (8 in.) thick)

Aluminum tape (50 mm (2 in.) wide)

NovoFoil® Type 1 (76.2 mm (3 in.) thick) with low-E material facing furred air space

Wood furring (19.1 mm × 63.5 mm (1 × 3)) installed vertically at 609.6 mm (24 in.) on centre (o.c.)

Gypsum board (12.7 mm (1/2 in.) thick) installed vertically

Note: There is an air space of 19.1 mm (3/4 in.) between the polystyrene board (NovoFoil®) and the gypsum board.

Table 6. Results of modeling the thermal resistance values for the wall assembly 2
Property	Unit	Requirement	Result
Property	Unit	Requirement	k₁^{Table footnote (1)}	k₂^{Table footnote (1)}
Room-side air temperature	°C	Report value	21	21
Weather-side air temperature	°C	Report value	−18	−18
Thermal resistance of the wall^{Table footnote (2)}^{Table footnote (3)}	(m²·K)/W	Report value	3.18	3.11
Design thermal resistance of the wall^{Table footnote (3)}^{Table footnote (4)}	(m²·K)/W	^{Table footnote (5)}	3.33	3.26

Notes:

Footnote 1

Footnote 2

Excludes room- and weather-side air films.

Footnote 3

The uncertainty for the numerical heat transfer simulations is estimated at ± 9%.

Footnote 4

Footnote 5

For the minimum effective thermal resistance requirements, see Minimum effective design thermal resistance requirements and performance – Article 9.36.2.8. of the NBC 2015.

isometric drawing of assembly 2 — Figure 2. NovoFoil® adjacent to the furred air space assembly installed within the wall assembly 2:

Concrete wall (203.2 mm (8 in.) thick)

Aluminum tape (50 mm (2 in.) wide)

NovoFoil® Type 1 (76.2 mm (3 in.) thick) with low-E material facing furred air space

Wood furring (38.1 mm × 63.5 mm (2 × 3)) installed vertically at 609.6 mm (24 in.) on centre (o.c.)

Gypsum board (12.7 mm (1/2 in.) thick) installed vertically

Note: There is an air space of 63.5 mm (2 1/2 in.) between the polystyrene board (NovoFoil®) and the gypsum board.

Table 7. Results of modeling the thermal resistance values for the wall assembly 3
Property	Unit	Requirement	Result
Property	Unit	Requirement	k₁^{Table footnote (1)}	k₂^{Table footnote (1)}
Room-side air temperature	°C	Report value	21	21
Weather-side air temperature	°C	Report value	−18	−18
Thermal resistance of the wall^{Table footnote (2)}^{Table footnote (3)}	(m²·K)/W	Report value	3.10	3.02
Design thermal resistance of the wall^{Table footnote (3)}^{Table footnote (4)}	(m²·K)/W	^{Table footnote (5)}	3.25	3.17

Notes:

Footnote 1

Footnote 2

Excludes room- and weather-side air films.

Footnote 3

The uncertainty for the numerical heat transfer simulations is estimated at ± 9%.

Footnote 4

Footnote 5

For the minimum effective thermal resistance requirements, see Minimum effective design thermal resistance requirements and performance – Article 9.36.2.8. of the NBC 2015.

Figure 3. NovoFoil® adjacent to the furred air space assembly installed within the wall assembly 2:

Concrete wall (203.2 mm (8 in.) thick)
Aluminum tape (50 mm (2 in.) wide)
NovoFoil® Type 1 (76.2 mm (3 in.) thick) with low-E material facing furred air space
Double wood furring (19.1 mm × 63.5 mm (1 × 3)) installed vertically at 609.6 mm (24 in.) on centre (o.c.) and horizontally at 406.4 mm (16 in.) o.c.
Gypsum board (12.7 mm (1/2 in.) thick) installed vertically

Note: There is an air space of 31.8 mm (1 1/2 in.) between the polystyrene board (NovoFoil®) and the gypsum board.

Additional data

Data in this section does not form part of the CCMC's Code compliance opinion.

Heat transfer control (NovoFoil® board with a furred air space assembly)

The following data are provided for comparison purposes with the requirements of the Novoclimat - Small Multiple-Unit Building (Novoclimat) program only. Novoclimat is a program administered by the Québec Ministry of Energy and Natural Resources. The latest requirements were issued on January 1, 2021.

Parmeters used for the simulations

The effective thermal resistance of the manufacturer’s designated wall assemblies 1, 2 and 3 shown in Figure 1, Figure 2 and Figure 3 was determined based on numerical heat transfer simulations using COMSOL Multiphysics^®. Simulations were conducted using an indoor air temperature of 21±1°C and an outdoor air temperature of −35±1°C. These temperature parameters comply with the Novoclimat requirements. The simulations used 0.6 for the emissivity of the facer (result after aging and weathering) and the measured temperature-dependent thermal conductivity of the NovoFoil^®. The thermal conductivity was determined as a linear fit of thermal resistance versus temperature based on testing in compliance with ASTM C 518 at mean temperatures of 24°C, 10°C, 4°C, −4°C and −7.5°C.

Novoclimat requirements

For compliance with Novoclimat, the minimum effective thermal resistance values for foundation walls in buildings for climate locations with heating degree-days (HDD) < 6 000 are presented in the table below. The minimum requirements apply to buildings with heat-recovery ventilators.

Table 8. Minimum effective thermal resistance requirements – Novoclimat
Property		Unit	Requirement zone HDD < 6 000	Results^{Table footnote (1)}^{Table footnote (2)}
Minimum effective thermal resistance of the wall assembly	wall assembly 1 (Figure 1)	(m²·K)/W	3.17	Pass
	wall assembly 2 (Figure 2)			Pass
	wall assembly 3 (Figure 3)			Pass

Notes:

Footnote 1

Footnote 2

The results are based on modeling using NovoFoil^® proprietary conductivity-temperature dependant linear fit. This is to simulate the temperature profile of NovoFoil^® if the foundation wall assembly hadbeen tested in compliance with ASTM C 1363, “Standard Test Method for Thermal Performance of Building Assemblies by Means of a Hot Box Apparatus” using the same indoor air temperature (21±1°C) and outdoor air temperature (−35±1°C). The manufacturer attested that the conductivity values can be maintained during the annual production of NovoFoil®.

Table 9. Results of modeling the thermal resistance values for the wall assembly 1
Property	Unit	Requirement	Result
Property	Unit	Requirement	k₁^{Table footnote (1)}	k₂^{Table footnote (1)}
Room-side air temperature	°C	Report value	21	21
Weather-side air temperature	°C	Report value	−35	−35
Thermal resistance of the wall^{Table footnote (2)}^{Table footnote (3)}	(m²·K)/W	Report value	3.15	3.09
Design thermal resistance of the wall^{Table footnote (3)}^{Table footnote (4)}	(m²·K)/W	^{Table footnote (5)}	3.30	3.24

Notes:

Footnote 1

Footnote 2

Excludes room- and weather-side air films.

Footnote 3

The uncertainty for the numerical heat transfer simulations is estimated at ± 9%.

Footnote 4

This value takes into account the interior and exterior air film conductance data from the ASHRAE Handbook of 8.29 W/m²∙K (corresponding resistance is 1/8.29) and 34.00 W/m²·K (corresponding resistance is 1/34.00), respectively.

Footnote 5

For the Novoclimat minimum effective thermal resistance requirements, see Minimum effective thermal resistance requirements – Novoclimat.

Table 10. Results of modeling the thermal resistance values for the wall assembly 2
Property	Unit	Requirement	Result
Property	Unit	Requirement	k₁^{Table footnote (1)}	k₂^{Table footnote (1)}
Room-side air temperature	°C	Report value	21	21
Weather-side air temperature	°C	Report value	−35	−35
Thermal resistance of the wall^{Table footnote (2)}^{Table footnote (3)}	(m²·K)/W	Report value	3.25	3.18
Design thermal resistance of the wall^{Table footnote (3)}^{Table footnote (4)}	(m²·K)/W	^{Table footnote (5)}	3.40	3.33

Notes:

Footnote 1

Footnote 2

Excludes room- and weather-side air films.

Footnote 3

The uncertainty for the numerical heat transfer simulations is estimated at ± 9%.

Footnote 4

Footnote 5

For the Novoclimat minimum effective thermal resistance requirements, see Minimum effective thermal resistance requirements – Novoclimat.

Table 11. Results of modeling the thermal resistance values for the wall assembly 3
Property	Unit	Requirement	Result
Property	Unit	Requirement	k₁^{Table footnote (1)}	k₂^{Table footnote (1)}
Room-side air temperature	°C	Report value	21	21
Weather-side air temperature	°C	Report value	−35	−35
Thermal resistance of the wall^{Table footnote (2)}^{Table footnote (3)}	(m²·K)/W	Report value	3.16	3.09
Design thermal resistance of the wall^{Table footnote (3)}^{Table footnote (4)}	(m²·K)/W	^{Table footnote (5)}	3.31	3.24

Notes:

Footnote 1

Footnote 2

Excludes room- and weather-side air films.

Footnote 3

The uncertainty for the numerical heat transfer simulations is estimated at ± 9%.

Footnote 4

Footnote 5

For the Novoclimat minimum effective thermal resistance requirements, see Minimum effective thermal resistance requirements – Novoclimat.