City of Havre de Grace, MD Energy Conservation Code

The International Energy Conservation Code 2021 shall be adopted with the following amendments.

The name of the jurisdiction in the second line of Section C101.1 shall be "The Mayor and City Council of Havre de Grace referred to herein as the City of Havre de Grace."

Sections C103 through C110 are deleted and replaced by appropriate sections within Article II of this code.

Section C202 is amended by adding the following definitions:

(1)

HOTEL. Means an establishment that offers sleeping accommodations for compensation with the exception of a bed-and-breakfast establishment as defined under the City Code.

(2)

MASTER CONTROL DEVICE. Means a control that is activated when a person enters the room through the primary room access method; or an occupancy sensor control that is activated by a person's presence in the room.

New Section C405.2.1.5, Hotel Guest Rooms: "Each hotel guest room shall be equipped with a master control device that automatically turns off the power to all of the lighting fixtures in the guest room no more than 30 minutes after the room has been vacated.

Section R101.1 is amended by inserting "The City of Havre de Grace" in the second line for the Name of Jurisdiction.

Section R102.1.1 is amended by adding the following at the end of the section: "Compliance with the silver rating of the ICC 700 NGBS as codified in the Annotated Code of Maryland Public Safety Article § 12-509(A)."

Sections R103 through R110 of the 2021 International Energy Conservation Code are deleted and replaced by appropriate sections within Article II of this Code.

Section R401.2.5 is amended by adding the following after item number 3: "4. For buildings complying with Section R402.1.3.1, the structure shall also comply with the additional energy features of Section N1108.3."

New Section R402.1.3.1, Maryland Alternative R-Value: "Assemblies with an R-value of insulation materials equal to or greater than that specified in Table R402.1.3.1 shall be an alternative to the U-factor in Table R402.1.2 when combined with Section R408.3. The provision of Section R408.2.1 shall be applied to the base model house to establish the reference base design establishing energy efficiency.

Table (R402.1.3.1) MD Alternative Insulation Minimum R-Values and Fenestration Requirements by Component^a
Climate Zone	Fenestration U-Factor^{b, i}	Skylight^b U-Factor	Glazed Fenestration SHGC^{b, e}	Ceiling R-Value	Wood Frame Wall R-Value^g	Mass Wall R-Value^h	Floor R-Value	Basement^{c, g} Wall R-Value	Slab^d R-Value & Depth	Crawl Space^{c, g} Wall R-Value
4 except Marine	0.30	0.55	0.40	49	20 or 15+3^g	8/13	19	10ci or 13	10ci, 4ft	11ci or 13
5	0.30ⁱ	0.55	0.40	49	20 or 15+3^g	13/17	30	15ci or 19 or 13 + 5ci	10ci, 4ft	15ci or 19 Or 13 + 5ci

Notes:
For SI: 1 foot = 304.8 mm.
NR = Not Required.
ci = continuous insulation.
a.	R-values are minimums. U-factors and SHGC are maximums. Where insulation is installed in a cavity that is less than the label or design thickness of the insulation, the installed R-value of the insulation shall be not less than the R-value specified in the table.
b.	The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestration. Exception: In Climate Zones 0 through 3, skylights shall be permitted to be excluded from glazed fenestration SHGC requirements provided that the SHGC for such skylights does not exceed 0.30.
c.	"Sci or 13" means R-5 continuous insulation (ci) on the interior or exterior surface of the wall or R-13 cavity insulation on the interior side of the wall. "10ci or 13" means R-10 continuous insulation (ci) on the interior or exterior surface of the wall or R-13 cavity insulation on the interior side of the wall. "15ci or 19 or 13 & Sci" means R-15 continuous insulation (ci) on the interior or exterior surface of the wall; or R-19 cavity insulation on the interior side of the wall; or R-13 cavity insulation on the interior of the wall in addition to R-5 continuous insulation on the interior or exterior surface of the wall.
d.	R-5 insulation shall be provided under the full slab area of a heated slab in addition to the required slab edge insulation R-value for slabs, as indicated in the table. The slab-edge insulation for heated slabs shall not be required to extend below the slab.
e.	There are no SHGC requirements in the Marine Zone.
f.	Basement wall insulation is not required in Warm Humid locations as defined by Figure R301.1 and Table R301.1.
g.	The first value is cavity insulation, the second value is continuous insulation. Therefore, as an example, "13 & 5" means R-13 cavity insulation plus R-5 continuous insulation.
h.	Mass walls shall be in accordance with Section R402.2.5. The second R-value applies where more than half of the insulation is on the interior of the mass wall.
i.	A maximum U-factor of 0.32 shall apply in Climate Zones 3 through 8 to vertical fenestration products installed in buildings located either:
	1.	Above 4,000 feet in elevation, or
	2.	In windborne debris regions where protection of openings is required by Section R301.2.1.2 of the International Residential Code.

Section R402.2.1 is amended by adding "or Section R402.1.3.1" between "R402.1.3" and "requires" in the second and seventh line.

Section R402.2.2 is amended by adding "or Section R402.1.3.1" between "R402.1.3" and "requires" in the second and eleventh line.

New Section R408.3, Maryland Alternative Additional Energy Efficiency Package Options: "The provisions of this section shall be applied as part of the prescriptive compliance path of Section R402.1.3.1. Additional energy efficiencies from Table R408.3 must be selected to meet or exceed a minimum percentage increase of 6%.

	Energy Feature	Percentage Increase for Climate Zone 4
1	> 2.5% reduction in total UA⁵	1%
2	> 5% reduction in total UA⁵	2%
3	> 7.5% reduction in total UA⁵	2%
4	0.22 U-factor windows⁵	3%
5	High performance cooling system (Greater than or equal to 18 SEER and 14 EER air conditioner)²	3%
6	High performance cooling system (Greater than or equal to 16 SEER and 12 EER air conditioner)²	3%
7	High performance gas furnace (Greater than or equal to 96 AFUE natural gas furnace)²	5%
8	High performance gas furnace (Greater than or equal to 92 AFUE natural gas furnace)²	4%
9	High performance heat pump system (Greater than or equal to 10 HSPF/18 SEER air source heat pump.)²	6%
10	High performance heat pump system (Greater than or equal to 9 HSPF/16 SEER air source heat pump.)²	5%
11	Ground source heat pump (Greater than or equal to 3.5 COP ground source heat pump.)²	6%
12	Fossil fuel service water heating system (Greater than or equal to 82 EF fossil fuel service water-heating system.)	3%
13	High performance heat pump water heating system option (Greater than or equal to 2.9 UEF electric service water-heating system.)	8%
14	High performance heat pump water heating system. (Greater than or equal to 3.2 UEF electric service water-heating system.)	8%
15	Solar hot water heating system (Greater than or equal to 0.4 solar fraction solar water-heating system.)	6%
16	More efficient HVAC distribution system. (100% of ductless thermal distribution system or hydronic thermal distribution system located completely inside the building thermal envelope.)	10%
17	100% of ducts in conditioned space. (100% of duct thermal distribution system located in conditioned space as defined by Section R403.3.2.)	12%
18	Reduced total duct leakage. (When ducts are located outside conditioned space, the total leakage of the ducts, measured in accordance with R403.3.5, shall be in accordance with one of the following: a. Where air handler is installed at the time of testing, 2.0 cubic feet per minute per 100 square feet of conditioned floor area. b. Where air handler is not installed at the time of testing, 1.75 cubic feet per minute per 100 square feet of conditioned floor area.)	1%
19	2 ACH50 air leakage rate with ERV or HRV installed. (Less than or equal to 2.0 ACH50, with either an Energy Recovery Ventilator (ERV) or Heat Recovery Ventilator (HRV) installed.)³	10%
20	2 ACH50 air leakage rate with balanced ventilation. (Less than or equal to 2.0 ACH50, with balanced ventilation as defined in Section 202 of the 2021 International Mechanical Code.)⁴	4%
21	1.5 ACH50 air leakage rate with ERV or HRV installed. (Less than or equal to 1.5 ACH50, with either an ERV or HRV installed.)⁴	12%
22	1 ACH50 air leakage rate with ERV or HRV installed. (Less than equal to 1.0 ACH50, with either an ERV or HRV installed.)⁴	14%
23	Energy Efficient Appliances (Minimum 3 appliances not to exceed 1 form each type with follow efficiencies. Refrigerator - Energy Star Program Requirements, Product Specification for Consumer Refrigeration Products, Version 5.1 (08/05/2021), Dishwasher - Energy Star Program Requirements for Residential Dishwashers, Version 6.0 (01/29/2016), Clothes Dryer - Energy Star Program Requirements, Product Specification for Clothes Dryers, Version 1.1 (05/05/2017) and Clothes Washer - Energy Star Program Requirements, Product Specification for Clothes Washers, Version 8.1 (02/05/2018)	7%
24	Renewable Energy Measure.⁴	11%

Notes:
1.	Energy efficiency percentage increases as established by PNNL.
2.	For multiple cooling systems, all systems shall meet or exceed the minimum efficiency requirements in this section and shall be sized to serve 100% of the cooling design load. For multiple heating systems, all systems shall meet or exceed the minimum efficiency requirements in this section and shall be sized to serve 100% of the heating design load. Increases to minimum efficiency requirements are limited to one selection.
3.	Minimum HRV and ERV requirements, measured at the lowest tested net supply airflow, shall be greater than or equal to 75% Sensible Recovery Efficiency (SRE), less than or equal to 1.1 cubic feet per minute per watt (0.03 m3/min/watt) and shall not use recirculation as a defrost strategy. In addition, the ERV shall be greater than or equal to 50% Latent Recovery/Moisture Transfer (LRMT).
4.	Renewable energy resources shall be permanently installed that have the capacity to produce a minimum of 1.0 watt of on-site renewable energy per square foot of conditioned floor area. The installed capacity shall be in addition to any onsite renewable energy required by Section R404.4. To qualify for this option, one of the following forms of documentation shall be provided to the code official:
	i.	Substantiation that the RECs associated with the on-site renewable energy are owned by, or retired on behalf of, the homeowner.
	ii.	A contract that conveys to the homeowner the RECs associated with the on-site renewable energy, or conveys to the homeowner an equivalent quantity of RECs associated with other renewable energy.
5.	Reduction in total UA from lines 1, 2 or 3 and higher performance windows from line 4 are limited to a single selection.