Roof, Wall, and Glass Zone Type Tables

The roof, glass, and wall types for the HVAC building load calculations are taken from the 1997 ASHRAE Handbook, Fundamentals. Our calculations use the CLTD method. In the 2001 Fundamentals the load calculation chapter was changed to use the RTS method, but the CLTD method is still considered valid.

The roof types are taken from 1997 ASHRAE Handbook, Fundamentals, Table 31, page 28.42.

The wall types are taken from 1997 ASHRAE Handbook, Fundamentals, Table 33A, pages 28.46-48.

The glass zone types are taken from 1997 ASHRAE Handbook, Fundamentals, Table 35B, page 28.49.

These tables are available below for reference purposes.

The names for the default types are abbreviations. If you have trouble figuring out our system, there is a full description for each type that is displayed when you select it.

Table 31: Roof Types

Use this table to match the properties of your roof to the ASHRAE Roof Type ▾ in the Roof Project Schedule and Roof Master Schedule.

If a parameter combination is not possible, the cell will be blank.

Mass Location**	R-Value, h·ft²·°F/Btu	B7, 1" Wood	C12, 2" HW Concrete	A3, Steel Deck	Attic-Ceiling Combination
Mass inside insulation	0 - 5		2
	5 - 10		2
	10 - 15		4
	15 - 20		4
	20 - 25		5
	25 - 30
Mass inside insulation, suspended ceiling	0 - 5		5
	5 - 10		8
	10 - 15		13
	15 - 20		13
	20 - 25		14
	25 - 30
Mass evenly placed	0 - 5	1	2	1	1
	5 - 10	2		1	2
	10 - 15	2		1	2
	15 - 20	4		2	2
	20 - 25	4		2	4
	25 - 30
Mass evenly placed, suspended ceiling	0 - 5		3	1
	5 - 10	4		1
	10 - 15	5		2
	15 - 20	9		2
	20 - 25	10		4
	25 - 30	10
Mass outside insulation	0 - 5		2
	5 - 10		3
	10 - 15		4
	15 - 20		5
	20 - 25		5
	25 - 30
Mass outside insulation, suspended ceiling	0 - 5		3
	5 - 10		3
	10 - 15		4
	15 - 20		5
	20 - 25
	25 - 30

**C12 is considered massive; others are considered nonmassive

Table 33: Wall Types

Use these tables to match the properties of your roof to the ASHRAE Wall Type ▾ in the Wall Project Schedule and Wall Master Schedule. See Table 11 for definitions of the wall material code numbers.

If a parameter combination is not possible, the cell will be blank.

Table 33A: Mass Located Inside Insulation

Stucco and/or plaster	R-Value, h·ft²·°F/Btu	A1	A2	B7	B10	B9	C1	C2	C3	C4	C5	C6	C7	C8	C17	C18
	0.0 - 2.0
	2.0 - 2.5		5								5
	2.5 - 3.0		5				3		2	5	6			5
	3.0 - 3.5		5				4	2	2	5	6			6
	3.5 - 4.0		5				4	2	3	6	6	10	4	6		5
	4.0 - 4.75		6				5	2	4	6	6	11	5	10		10
	4.75 - 5.5		6				5	2	4	6	6	11	5	10		10
	5.5 - 6.5		6				5	2	5	10	7	12	5	11		10
	6.5 - 7.75		6				5	4	5	11	7	16	10	11		11
	7.75 - 9.0		6				5	4	5	11	7		10	11		11
	9.0 - 10.75		6				5	4	5	11	7		10	11	4	11
	10.75 - 12.75		6				5	4	5	11	11		10	11	4	11
	12.75 - 15.0		10				10	4	5	11	11		10	11	9	12
	15.0 - 17.5		10				10	5	5	11	11		11	12	10	16
	17.5 - 20.0		11				10	5	9	11	11		15	16	10	16
	20.0 - 23.0		11				10	9	9	16	11		15	16	10	16
	23.0 - 27.0												16		15
Steel or other lightweight siding	R-Value, h·ft²·°F/Btu	A1	A2	B7	B10	B9	C1	C2	C3	C4	C5	C6	C7	C8	C17	C18
	0.0 - 2.0
	2.0 - 2.5		3						2	3	5
	2.5 - 3.0		5				2		2	5	3			5
	3.0 - 3.5		5				3	1	2	5	5			5
	3.5 - 4.0		5				3	2	2	5	5	6	3	5		5
	4.0 - 4.75		6				4	2	2	5	5	10	4	6		5
	4.75 - 5.5		6				5	2	2	6	6	11	5	6		6
	5.5 - 6.5		6				5	2	3	6	6	11	5	6		6
	6.5 - 7.75		6				5	2	3	6	6	11	5	6		10
	7.75 - 9.0		6				5	2	3	6	6	12	5	6		11
	9.0 - 10.75		6				5	2	3	6	6	12	5	6	4	11
	10.75 - 12.75		6				5	2	3	6	7	12	6	11	4	11
	12.75 - 15.0		6				5	2	4	6	7	12	10	11	5	11
	15.0 - 17.5		10				6	4	4	10	7		10	11	9	11
	17.5 - 20.0		10				10	4	4	10	11		10	11	10	11
	20.0 - 23.0		11				10	4	5	11	11		10	11	10	16
	23.0 - 27.0												10		11	16
Face brick	R-Value, h·ft²·°F/Btu	A1	A2	B7	B10	B9	C1	C2	C3	C4	C5	C6	C7	C8	C17	C18
	0.0 - 2.0
	2.0 - 2.5	3									11
	2.5 - 3.0	5	11						6	11	12
	3.0 - 3.5	5	12	5			11		11	12	12			12
	3.5 - 4.0	5	12	6			12	6	12	12	13			12
	4.0 - 4.75	6	13	6	10		13	10	12	12	13		11			16
	4.75 - 5.5	6	13	6	11			11	12	13	13		16
	5.5 - 6.5	6	13	6	11			11	12	13	13
	6.5 - 7.75	6	13	6	11			11	13		13
	7.75 - 9.0	6	13	10	16			11	13		13
	9.0 - 10.75	6	14	10	16			11	13		14				16
	10.75 - 12.75	6	14	10	16			11	13		14				16
	12.75 - 15.0	6		11	16			12	13
	15.0 - 17.5	10		11				12	13
	17.5 - 20.0	10		11				16
	20.0 - 23.0	11		15				16
	23.0 - 27.0							16

Table 33B: Mass Evenly Placed

Stucco and/or plaster	R-Value, h·ft²·°F/Btu	A1	A2	B7	B10	B9	C1	C2	C3	C4	C5	C6	C7	C8	C17	C18
	0.0 - 2.0	1	3						1	3	3
	2.0 - 2.5	1	3	1			2		2	4	4			5
	2.5 - 3.0	1	4	1			2	2	2	4	4			5
	3.0 - 3.5	1		1			2	2				10	4	5		4
	3.5 - 4.0	1		1	2			4				10	4			4
	4.0 - 4.75	1		1	2							10	4			4
	4.75 - 5.5	1		1	2
	5.5 - 6.5	1		2	4	10
	6.5 - 7.75	1		2	4	11
	7.75 - 9.0	1		2	4	16
	9.0 - 10.75	1		2	4	16									4
	10.75 - 12.75	1		2	5										4
	12.75 - 15.0	2		2	5
	15.0 - 17.5	2		2	5
	17.5 - 20.0	2		2	9
	20.0 - 23.0	2		4	9
	23.0 - 27.0				9
Steel or other lightweight siding	R-Value, h·ft²·°F/Btu	A1	A2	B7	B10	B9	C1	C2	C3	C4	C5	C6	C7	C8	C17	C18
	0.0 - 2.0	1	3						1	3	2
	2.0 - 2.5	1	3	1			2		1	3	2			3
	2.5 - 3.0	1	4	1			2	1	2	4	4			3
	3.0 - 3.5	1		1			4	1				5	2	4		4
	3.5 - 4.0	1		1	2			2				5	2			4
	4.0 - 4.75	1		1	2							10	4			4
	4.75 - 5.5	1		1	2
	5.5 - 6.5	1		1	2	10
	6.5 - 7.75	1		1	4	11
	7.75 - 9.0	1		2	4	16
	9.0 - 10.75	1		2	4	16
	10.75 - 12.75	1		2	4
	12.75 - 15.0	1		2	5
	15.0 - 17.5	1		2	5
	17.5 - 20.0	1		2	5
	20.0 - 23.0	2		4	9
	23.0 - 27.0				9
Face brick	R-Value, h·ft²·°F/Btu	A1	A2	B7	B10	B9	C1	C2	C3	C4	C5	C6	C7	C8	C17	C18
	0.0 - 2.0	3	6								6
	2.0 - 2.5	3	10						5	10	10
	2.5 - 3.0	4	10	5			5		5	10	11			10
	3.0 - 3.5		11	5			10	5	5	11	11	15	10	10		10
	3.5 - 4.0		11	5	10		10	5	5	11	11	16	10	16		10
	4.0 - 4.75		11		11		10	5	5	16	11		10	16		16
	4.75 - 5.5		11		11		10	5	10	16	16		10	16		16
	5.5 - 6.5		16				10	9	10	16	11		11	16		16
	6.5 - 7.75		16				11	9	10	16	16		16	16
	7.75 - 9.0		16				15	9	10	16			15	16
	9.0 - 10.75		16				15	10	10		16		16		10
	10.75 - 12.75		16				16	10	10				16		15
	12.75 - 15.0		16				16	10	10		16				15
	15.0 - 17.5						16	10	15						16
	17.5 - 20.0						16	15	15						16
	20.0 - 23.0							15	16
	23.0 - 27.0							15

Table 33C: Mass Located Outside Insulation

Stucco and/or plaster	R-Value, h·ft²·°F/Btu	A1	A2	B7	B10	B9	C1	C2	C3	C4	C5	C6	C7	C8	C17	C18
	0.0 - 2.0	1	3						1	3	2
	2.0 - 2.5	1	3	1			2		1	3	2			3
	2.5 - 3.0	1	4	1			2	1	2	4	4			3
	3.0 - 3.5	1		1			4	1				5	2	4		4
	3.5 - 4.0	1		1	2			2				5	2			4
	4.0 - 4.75	1		1	2							10	4			4
	4.75 - 5.5	1		1	2
	5.5 - 6.5	1		2	2	10
	6.5 - 7.75	1		2	4	11
	7.75 - 9.0	1		2	4	16
	9.0 - 10.75	1		2	4	16									2
	10.75 - 12.75	1		2	4										4
	12.75 - 15.0	2		2	5
	15.0 - 17.5	2		2	5
	17.5 - 20.0	2		2	5
	20.0 - 23.0	2		4	9
	23.0 - 27.0				9
Steel or other lightweight siding	R-Value, h·ft²·°F/Btu	A1	A2	B7	B10	B9	C1	C2	C3	C4	C5	C6	C7	C8	C17	C18
	0.0 - 2.0	1	3						1	3	2
	2.0 - 2.5	1	3	1			2		1	3	2			3
	2.5 - 3.0	1	4	1			2	1	2	4	4			3
	3.0 - 3.5	1		1			4	1				5	2	4		4
	3.5 - 4.0	1		1	2			2				5	2			4
	4.0 - 4.75	1		1	2							10	4			4
	4.75 - 5.5	1		1	2
	5.5 - 6.5	1		1	2	10
	6.5 - 7.75	1		1	4	11
	7.75 - 9.0	1		2	4	16
	9.0 - 10.75	1		2	4	16									2
	10.75 - 12.75	1		2	4										4
	12.75 - 15.0	1		2	5
	15.0 - 17.5	1		2	5
	17.5 - 20.0	1		2	5
	20.0 - 23.0	2		4	9
	23.0 - 27.0				9
Face brick	R-Value, h·ft²·°F/Btu	A1	A2	B7	B10	B9	C1	C2	C3	C4	C5	C6	C7	C8	C17	C18
	0.0 - 2.0	3	6								6
	2.0 - 2.5	3	10						5	10	10
	2.5 - 3.0	4	10	5			5		5	10	11			10
	3.0 - 3.5		11	5			10	5	5	11	11	15	10	10		10
	3.5 - 4.0		11	5	10		10	5	5	11	11	16	10	16		10
	4.0 - 4.75		11		11		10	5	5	16	11		10	16		16
	4.75 - 5.5		11		11		10	5	10	16	16		10	16		16
	5.5 - 6.5		16				10	9	10	16	11		11	16		16
	6.5 - 7.75		16				11	9	10	16	16		16	16
	7.75 - 9.0		16				15	9	10	16			15	16
	9.0 - 10.75		16				15	10	10		16		16		10
	10.75 - 12.75		16				16	10	10				16		15
	12.75 - 15.0		16				16	10	10		16				15
	15.0 - 17.5						16	10	15						16
	17.5 - 20.0						16	15	15						16
	20.0 - 23.0							15	16
	23.0 - 27.0							15

Table 11 (Partial): Thermal Properties of Wall Materials

Table 33 references wall materials that are defined in this table. The following is a partial transcription of Table 11 that only includes the wall materials referenced.

Code Number	Description	L	k	ρ	c_p	R	Mass
A1	1" Stucco	0.0833	0.40	116.0	0.2	0.21	9.7
A2	4" Face brick	0.333	0.77	125.0	0.22	0.43	41.7
B7	1" Wood	0.0833	0.07	37.0	0.6	1.19	3.1
B10	2" Wood	0.167	0.07	37.0	0.6	2.39	6.2
B9	4" Wood	0.333	0.07	37.0	0.6	4.76	12.3
C1	4" Clay tile	0.333	0.33	70.0	0.2	1.01	23.3
C2	4" Lightweight concrete block	0.333	0.22	38.0	0.2	1.51	12.7
C3	4" Heavyweight concrete block	0.333	0.47	61.0	0.2	0.71	20.3
C4	4" Common brick	0.333	0.42	120.0	0.2	0.79	40.0
C5	4" Heavyweight concrete	0.333	1.00	140.0	0.2	0.33	46.7
C6	8" Clay tile	0.667	0.33	70.0	0.2	2.00	46.7
C7	8" Lightweight concrete block	0.667	0.33	38.0	0.2	2.00	25.3
C8	8" Heavyweight concrete block	0.667	0.60	61.0	0.2	1.11	40.7
C17	8" Lightweight concrete block (filled)	0.667	0.08	18.0	0.2	8.34	12.0
C18	8" Heavyweight concrete block (filled)	0.667	0.34	53.0	0.2	1.96	35.4

L = thickness, ft
k = thermal conductivity, Btu/h·ft·°F
ρ = density, lb/ft³
c_p = specific heat, Btu/lb·°F
R = thermal resistance, °F·ft²·h/Btu
Mass = unit mass, lb/ft²

Table 35B: Glass Zone Types

Use this table to match the properties of your room to the Glass Zone Type ▾ in the Room Project Schedule, Room Master Schedule, or the Room List dialog box.

In cases where the effects of the inside shade are negligible, the cell will be blank.

Walls in Zone	Floor Covering	Partition Type	Inside Shade	Glass Zone Type
1 - 2	Carpet	Gypsum		A
	Carpet	Concrete block		B
	Vinyl	Gypsum	Full	B
	Vinyl	Gypsum	Half to None	C
	Vinyl	Concrete block	Full	C
	Vinyl	Concrete block	Half to None	D
3	Carpet	Gypsum		A
	Carpet	Concrete block	Full	A
	Carpet	Concrete block	Half to None	B
	Vinyl	Gypsum	Full	B
	Vinyl	Gypsum	Half to None	C
	Vinyl	Concrete block	Full	B
	Vinyl	Concrete block	Half to None	C
4	Carpet	Gypsum		A
	Vinyl	Gypsum	Full	B
	Vinyl	Gypsum	Half to None	C

Table 31: Roof Types​

Table 33: Wall Types​

Table 33A: Mass Located Inside Insulation​

Table 33B: Mass Evenly Placed​

Table 33C: Mass Located Outside Insulation​

Table 11 (Partial): Thermal Properties of Wall Materials​

Table 35B: Glass Zone Types​