Washington Administrative Code › Title 51 - Enterprise Services, Department of (Building Code Council) › Chapter 51-11C - State Building Code adoption and amendment of the 2021 edition of the International Energy Conservation Code, Commercial › Section 51-11C-404021 - Table C404.2-Minimum performance of water-heating equipment

Current through Register Vol. 24-14, July 15, 2024
Table C404.2 Minimum Performance of Water-Heating
				Equipment
Equipment
							 Type
Size Category
							 (input)
Subcategory or Rating
							 Condition
Draw
							 Pattern
Performance
							 Requireda,j
Test
							 Procedureb
Electric tabletop water
							 heatersk
[LESS THAN EQUAL TO] 12
							 kWc
[GREATER THAN EQUAL TO] 20 gal
[LESS THAN EQUAL TO] 120 gal
Very small Low Medium High
UEF [GREATER THAN EQUAL TO] 0.6323 - (0.0058 ×
							 Vr)
UEF [GREATER THAN EQUAL TO] 0.9188 - (0.0031 ×
							 Vr)
UEF [GREATER THAN EQUAL TO] 0.9577 - (0.0023 ×
							 Vr)
UEF [GREATER THAN EQUAL TO] 0.9884 - (0.0016 ×
							 Vr)
DOE 10 C.F.R. Part 430 App. E
Electric storage water heatersg,i
								resistance and heat pump
[LESS THAN EQUAL TO] 12
							 kWc
[GREATER THAN EQUAL TO] 20 gal
[LESS THAN ] 55 gal
Very small Low Medium High
UEF [GREATER THAN EQUAL TO] 0.8808 - (0.0008 ×
							 Vr)
UEF [GREATER THAN EQUAL TO] 0.9254 - (0.0003 ×
							 Vr)
UEF [GREATER THAN EQUAL TO] 0.9307 - (0.0002 ×
							 Vr)
UEF [GREATER THAN EQUAL TO] 0.9349 - (0.0001 ×
							 Vr)
DOE 10 C.F.R. Part 430 App. E
[LESS THAN EQUAL TO] 12 kW
[GREATER THAN ] 55 gal
[LESS THAN EQUAL TO] 120 gal
Very small Low Medium High
UEF [GREATER THAN EQUAL TO] 1.9236 - (0.0011 ×
							 Vr)
UEF [GREATER THAN EQUAL TO] 2.0440 - (0.0011 ×
							 Vr)
UEF [GREATER THAN EQUAL TO] 2.1171 - (0.0011 ×
							 Vr)
UEF [GREATER THAN EQUAL TO] 2.2418 - (0.0011 ×
							 Vr)
DOE 10 C.F.R. Part 430 App. E
Electric storage water
							 heatersg
[GREATER THAN EQUAL TO] 12 kW
(0.3 + 27/Vm), %h
DOE
							 10
							 C.F.R. 431.106 App B.
Grid-enabled water
							 heatersg,l
[LESS THAN ] 75 gal
Very small Low Medium High
UEF [GREATER THAN EQUAL TO] 1.0136 - (0.0028 ×
							 Vr)
UEF [GREATER THAN EQUAL TO] 0.9984 - (0.0014 ×
							 Vr)
UEF [GREATER THAN EQUAL TO] 0.9853 - (0.0010 ×
							 Vr)
UEF [GREATER THAN EQUAL TO] 0.9720 - (0.0007 ×
							 Vr)
10 C.F.R. 430  Appendix
							 E
Electric instantaneous water
							 heaterh
[LESS THAN ] 12 kW
[LESS THAN ] 2 gal
Very small Low Medium High
UEF [GREATER THAN EQUAL TO] 0.91
UEF [GREATER THAN EQUAL TO] 0.91
UEF [GREATER THAN EQUAL TO] 0.91
UEF [GREATER THAN EQUAL TO] 0.92
DOE 10 C.F.R. Part 430
[GREATER THAN ] 12 kW
[LESS THAN EQUAL TO] 58.6
							 kWc
[LESS THAN EQUAL TO] 2 gal [LESS THAN EQUAL TO]
							 180°F
All
UEF [GREATER THAN EQUAL TO] 0.80
DOE 10 C.F.R. Part 430
Gas storage water
							 heatersg
[LESS THAN EQUAL TO] 75,000 Btu/h
[GREATER THAN EQUAL TO] 20 gal & [LESS THAN EQUAL
							 TO] 55 galf
Very small Low Medium High
UEF [GREATER THAN EQUAL TO] 0.3456 - (0.0020 ×
							 Vr)
UEF [GREATER THAN EQUAL TO] 0.5982 - (0.0019 ×
							 Vr)
UEF [GREATER THAN EQUAL TO] 0.6483 - (0.0017 ×
							 Vr)
UEF [GREATER THAN EQUAL TO] 0.6920 - (0.0013 ×
							 Vr)
DOE 10 C.F.R. Part 430 App. E
[LESS THAN EQUAL TO] 75,000 Btu/h
[GREATER THAN ] 55 gal & [LESS THAN EQUAL TO] 100
							 galf
Very small Low Medium High
UEF [GREATER THAN EQUAL TO] 0.6470 - (0.0006 ×
							 Vr)
UEF [GREATER THAN EQUAL TO] 0.7689 - (0.0005 ×
							 Vr)
UEF [GREATER THAN EQUAL TO] 0.7897 - (0.0004 ×
							 Vr)
UEF [GREATER THAN EQUAL TO] 0.8072 - (0.0003 ×
							 Vr)
DOE 10 C.F.R. Part 430 App. E
[GREATER THAN EQUAL TO] 75,000 Btu/h and [LESS THAN
							 EQUAL TO] 105,000 Btu/hd
[LESS THAN ] 120 gal [LESS THAN]
							 180°F
Very small Low Medium High
UEF [GREATER THAN EQUAL TO] 0.2674-0.0009 x Vr
UEF [GREATER THAN EQUAL TO] 0.5362-0.0012 x Vr
UEF [GREATER THAN EQUAL TO] 0.6002-0.0011 x Vr
UEF [GREATER THAN EQUAL TO] 0.6597-0.0009 x
							 Vr
DOE 10 C.F.R. Part 430 App. E
[LESS THAN EQUAL TO] 105,000
							 Btu/hd,f
80% E
t
SL [LESS THAN EQUAL TO] (Q/800 +110[SQUAREROOT]V),
							 Btu/h
DOE
							 10
							 C.F.R. 431.106
Gas instantaneous water
							 heaterh
[GREATER THAN EQUAL TO] 50,000 Btu/h and [LESS THAN ]
							 200,000 Btu/
[LESS THAN ] 2 gal
Very small Low Medium High
UEF [GREATER THAN EQUAL TO] 0.80
UEF [GREATER THAN EQUAL TO] 0.81
UEF [GREATER THAN EQUAL TO] 0.81
UEF [GREATER THAN EQUAL TO] 0.81
DOE 10 C.F.R. Part 430 App. E
[GREATER THAN EQUAL TO] 200,000
							 Btu/hd,f
[LESS THAN ] 10 gal
80% E
t
DOE
							 10
							 C.F.R. 431.106
[GREATER THAN EQUAL TO] 200,000
							 Btu/hf
[GREATER THAN EQUAL TO] 10 gal
80% E
t
SL [LESS THAN EQUAL TO] (Q/800 +110[SQUAREROOT]V),
							 Btu/h
Oil storage water
							 heatersg
[LESS THAN EQUAL TO ] 105,000 Btu/h
[LESS THAN EQUAL TO] 50 gal
Very small Low Medium High
UEF = 0.2509 - (0.0012 × Vr)
UEF = 0.5330 - (0.0016 × Vr)
DOE 10 C.F.R. Part 430
UEF = 0.6078 - (0.0016 × Vr)
UEF = 0.6815 - (0.0014 × Vr)
[GREATER THAN EQUAL TO] 105,000 Btu/[LESS THAN EQUAL
							 TO] 140,000 Btu/he
[LESS THAN EQUAL TO] 120 gal [LESS THAN EQUAL TO]
							 180°F
Very small Low Medium High
UEF [GREATER THAN EQUAL TO] 0.2932-0.0015 x Vr
UEF [GREATER THAN EQUAL TO] 0.5596-0.0018 x Vr
UEF [GREATER THAN EQUAL TO] 0.6194-0.0016 x Vr
UEF [GREATER THAN EQUAL TO] 0.6740-0.0013 x
							 Vr
DOE 10 C.F.R. Part 430 App. E
[GREATER THAN ] 140,000 Btu/h
80% E
t
SL [LESS THAN EQUAL TO] (Q/800 +110[SQUAREROOT]V),
							 Btu/h
DOE
							 10
							 C.F.R. 431.106
Oil instantaneous water
							 heaterh
[LESS THAN EQUAL TO] 210,000 Btu/h
[LESS THAN ] 2 gal
80% E
t
EF [GREATER THAN EQUAL TO] 0.59 - 0.0005 x
							 V
DOE 10 C.F.R. Part 430 App. E
[GREATER THAN ] 210,000 Btu/h
[LESS THAN ] 10 gal
80% E
t
DOE
							 10
							 C.F.R. 431.106
[GREATER THAN ] 210,000 Btu/h
[GREATER THAN EQUAL TO] 10 gal
78% E
t
SL [LESS THAN EQUAL TO] (Q/800 +110[SQUAREROOT]V),
							 Btu/h
DOE
							 10
							 C.F.R. 431.106
Hot water supply boilers, gas and
							 oilh
[GREATER THAN EQUAL TO] 300,000 Btu/h and [LESS THAN]
							 12,500,000 Btu/h
[LESS THAN ] 10 gal
80% E
t
DOE
							 10
							 C.F.R. 431.106
Hot water supply boilers,
							 gash
[GREATER THAN EQUAL TO] 300,000 Btu/h and [LESS THAN
							 ] 12,500,000 Btu/h
[GREATER THAN EQUAL TO] 10 gal
80% E
t
SL [LESS THAN EQUAL TO] (Q/800 +110[SQUAREROOT]V),
							 Btu/h
DOE
							 10
							 C.F.R. 431.106
Hot water supply boilers,
							 oilh
[GREATER THAN EQUAL TO] 300,000 Btu/h and [LESS THAN
							 ] 12,500,000 Btu/h
[GREATER THAN EQUAL TO] 10 gal
78% E
t
SL [LESS THAN EQUAL TO] (Q/800 +110[SQUAREROOT]V),
							 Btu/h
DOE
							 10
							 C.F.R. 431.106
Pool heaters, gas
All
82% E
t
DOE                10 C.F.R. Part 430                App. P
Heat pump pool heaters
All
50°F db
44.2°F wb outdoor air
80.0°F entering water
4.0 COP
DOE 10 C.F.R. Part 430 App. P
Unfired storage tanks
All
Minimum insulation requirement R-12.5
							 (h-ft2-°F)/Btu
(none)
a Thermal efficiency (
				E
t
) is a minimum requirement, while
				standby loss is a maximum requirement. In the standby loss equation, V is the
				rated volume in gallons and Q is the nameplate input rate in Btu/h. V
				m is the measured volume in the tank in gallons. Standby
				loss for electric water heaters is in terms of %/h and denoted by the term "S,"
				and standby loss for gas and oil water heaters is in terms of Btu/h and denoted
				by the term "SL" Draw pattern (DP) refers to the water draw profile in the
				Uniform Energy Factor (UEF) test. UEF and Energy Factor (EF) are minimum
				requirements. In the UEF standard equations, V r  refers
				to the rated volume in gallons.
b Chapter 6 contains a complete
				specification, including the year version, of the referenced test
				procedure.
c Electric instantaneous water
				heaters with input capacity > 12 kW and [LESS THAN EQUAL TO] 58.6 kW that
				have either (1) a storage volume > 2 gal; or (2) is designed to provide
				outlet hot water at temperatures greater than 180°F; or (3) uses
				three-phase power has no efficiency standard.
d Gas storage water heaters with
				input capacity > 75,000 Btu/h and [LESS THAN EQUAL TO] 105,000 Btu/h must
				comply with the requirements for the > 105,000 Btu/h if the water heater
				either (1) has a storage volume > 120 gal; (2) is designed to provide outlet
				hot water at temperatures greater than 180°F; or (3) uses three-phase
				power.
e Oil storage water heaters with
				input capacity > 105,000 Btu/h and [LESS THAN EQUAL TO] 140,000 Btu/h must
				comply with the requirements for the > 140,000 Btu/h if the water heater
				either (1) has a storage volume > 120 gal; (2) is designed to provide outlet
				hot water at temperatures greater than 180°F; or (3) uses three-phase
				power.
f Water heaters or gas pool heaters
				in this category are regulated as consumer products by the USDOE as defined in
				10 C.F.R. Part 430.
g Storage water heaters have a ratio
				of input capacity (Btu/h) to tank volume (gal) [LESS THAN EQUAL TO]
				4000.
h Instantaneous water heaters and
				hot water supply boilers have an input capacity (Btu/h) divided by storage
				volume (gal) [GREATER THAN EQUAL TO] 4000 Btu/h-gal.
i There are no minimum efficiency
				requirements for electric heat pump water heaters greater than 12 kW or for gas
				heat pump water heaters.
j Refer to Section C404.2.1 for
				additional requirements for service water heat system equipment.
k A tabletop water heater is a
				storage water heater that is enclosed in a rectangular cabinet with a flat top
				surface not more than three feet (0.91 m) in height and have a ratio of input
				capacity (Btu/h) to tank volume (gal) [LESS THAN EQUAL TO] 4000.
l A grid-enabled water heater is an
				electric resistance water heater that meets all of the following:
1. Has a rated storage tank volume of more
			 than 75 gallons.
2. Is manufactured
			 on or after April 16, 2015.
3. Is
			 equipped at the point of manufacture with an activation lock.
4. Bears a permanent label applied by the
			 manufacturer that complies with all of the following:
4.1 Is made of material not adversely
			 affected by water.
4.2 Is attached
			 by means of nonwater soluble adhesive.
4.3 Advises purchasers and end-users of the
			 intended and appropriate use of the product with the following notice printed
			 in 16.5 point Arial Narrow Bold font: "IMPORTANT INFORMATION: This water heater
			 is intended only for use as a part of an electric thermal storage or demand
			 response program. It will not provide adequate hot water unless enrolled in
			 such a program and activated by your utility company or another program
			 operator. Confirm the availability of a program in your local area before
			 purchasing or installing this product."