Maryland

Summary

Maryland is currently the only state that has adopted the latest national model code, the 2012 IECC. State policy is to update to the latest code within 6 months of publication. Energy performance criteria are outlined for residential and non-residential buildings, addressing thermal envelope components and energy efficiency requirements for HVAC, hot water, lighting and auxiliary systems. The code allows a prescriptive path or a simulated performance calculation of a reference building to show compliance.

Maryland is considered to be one of the most progressive States when it comes to energy efficiency and has had efficiency requirements since 1981. The 2012 code and surrounding state policy includes a number of dynamic initiatives to improve energy efficiency; mandated automatic adoption of the latest model code, mandatory posting of building certificates, mandatory whole-house pressure testing for residential buildings (optional for large buildings), pre-occupancy commissioning of commercial and multi-family residential buildings, extensive training of inspectors and stakeholders following new code implementation and special efficiency requirements for public buildings.

General Information

Full Title of Code

Maryland: Building Performance Standards

Year of Adoption

2011

Date of Enforcement

Sunday, January 1, 2012

Authority in Charge

Maryland Department of Housing and Community Development.

Remit of Code

Geographical Coverage

Maryland

Code set at:

Regional/States Level

Coverage

Coverage of Building Code:

  • Residential buildings
    • One family
    • Multiple family buildings
  • Commercial buildings
    • Offices
    • Retail and wholesale
    • Hotels
    • Hospitals
    • Educational buildings
  • Public buildings
    • Offices
    • Hospitals
    • Educational buildings

GBPN Climate Classification:

  • Heating Based
  • Two prescribed climate zones under IECC (Zones 4 and 5).

Type of Building Code

Type of Building Code:

  • Model code, frame or actual code:
    Maryland relies on the national model energy code (IECC/ASHRAE 90.1) but has also mandated automatic adoption of the latest update of this code after each code cycle (every three years).
  • Prescriptive Codes:
    Prescriptive option requirements (Inclus of all mandatory requirements).
  • Performance Codes for New Builds:
    Partially, through the simulated performance alternative, however the calculation is based on an reference building.
  • Model / reference Building:
    Performance Option requirement - simulated performance alternative, RESCheck free software simulation (Inclus of all mandatory requirements), simulated according a reference building.

Energy Covered

Basis for Energy Requirements:

  • Overall performance frame:
    No overall performance value, Annual energy usage simulation demonstrates that the proposed building’s energy costs are < “standard code” building
  • Final Energy:
    Partially, energy assessed is based on site energy, similar to final energy.
  • Life Cycle Assessment considered (embedded energy):
    Maryland Life Cycle Cost Analysis Standards require an evaluation of the use of renewable energy systems and energy efficient strategies. In May 2011, the state also approved the 2012 (IGCC) for adoption by all local jurisdictions across the state.

Energy Uses and Functions Covered by the Code:

  • Heating
  • Cooling
  • Ventilation
  • Airtightness
  • Thermal bridging
  • Hot water
  • Building parts (lifts, pumps etc)
  • Lighting
  • Heat recovery
  • Natural ventilation
  • Daylighting requirements

Enforcement

Enforcement Status of Code:

Mandatory

Type of Enforcement:

  • Local enforcement
  • Third party inspection
  • Post Occupancy control

On-site Inspections Occur

  • During construction
  • Post occupancy

Certification to Support Enforcement of Code:

  • Energy Performance Certificate support BC
  • Inspection of boilers
  • Inspection of HVAC systems

Penalties for Non-compliance:

  • Refusal of permission to occupy
  • Refusal of permission to construct

Measures Supporting Enforcement:

  • Commissioning requirements
  • Airtightness testing required prior to compliance
  • Mandatory Computer Modeling
  • Training of Inspectors

Values for New Buildings

Residential Buildings - Climate Zone 4

GBPN Climate Classification

Heating based

Coefficient for Comparison of Climate Zones

0.00

MeanMinMax
HDD (°C)2501--
CDD (°C)895--
U-Value (W/m²K)
Roof0.12Roof2-
Wall0.28Wall2-
Floor0.3Floor2-
Window1.99Window2-
Others3.12--
Overall U-Value---
Window1Window2
G Value/SHGC0.4-
Visible Transmission--
Percent--

Other Requirements Set for:

  • Thermal bridge demands
  • Ventilation:
    General control requirements for furnaces. Heat Pumps require a smart thermostat or lockout feature to prevent unnecessary strip heat. Whole house ventilation system required to meet IMC or IRC minimum efficiency rates. Sealing with Mastic required.
  • Pressure testing for ducting
  • Domestic Hot Water COP - Heat Pump:
    DHW distribution system requirements.
  • Value for airtightness:
    n50 is 3.0 - Mandatory whole-house pressure test.
  • Heat Recovery
  • Technical HVAC systems:
    Coefficient of performance of HVAC system is 10-13.0 SEER
  • Efficient Lighting

Commercial Buildings - Group R (places providing accommodations for overnight stay)

GBPN Climate Classification

Heating based

Coefficient for Comparison of Climate Zones

0.00

MeanMinMax
HDD (°C)2501--
CDD (°C)895--
U-Value (W/m²K)
Roof0.15Roof2-
Wall0.28Wall20.5
Floor0.19Floor20.55
Window2.16Window22.16
Others---
Overall U-Value---
Window1Window2
G Value/SHGC0.40.4
Visible Transmission--
Percent--

Other Requirements Set for:

  • Thermal bridge demands
  • Ventilation:
    HVAC Controls - Programmable thermostat required for furnace. Heat Pump requires smart thermostat or lockout feature to prevent unnecessary strip heat. Air system economizers are required and at a lower threshold (33K Btu/h instead of 54K Btu/h)
  • Pressure testing for ducting
  • Domestic Hot Water COP - Heat Pump:
    DHW distribution system requirements.
  • Heat Recovery
  • Technical HVAC systems:
    Coefficient of performance of HVAC system is 10-13.0 SEER
  • Efficient Lighting

Residential Buildings - Climate Zone 5.

GBPN Climate Classification

Heating based

Coefficient for Comparison of Climate Zones

0.00

MeanMinMax
HDD (°C)2501--
CDD (°C)895--
U-Value (W/m²K)
Roof0.12Roof2-
Wall0.28Wall20.19
Floor-Floor2-
Window1.82Window2-
Others---
Overall U-Value---
Window1Window2
G Value/SHGC--
Visible Transmission--
Percent--

Other Requirements Set for:

  • Thermal bridge demands
  • Ventilation:
    General control requirements for furnaces. Heat Pumps require a smart thermostat or lockout feature to prevent unnecessary strip heat. Whole house ventilation system required to meet IMC or IRC minimum efficiency rates. Sealing with Mastic required.
  • Pressure testing for ducting
  • Domestic Hot Water COP - Heat Pump:
    DHW distribution system requirements
  • Value for airtightness:
    n50 is 3.0, mandatory whole-house pressure test.
  • Heat Recovery
  • Technical HVAC systems:
    Coefficient of performance of HVAC system is 10-13.0 SEER
  • Efficient Lighting

Commercial Buildings - Group R, Climate Zone 5

GBPN Climate Classification

Heating based

Coefficient for Comparison of Climate Zones

0.00

MeanMinMax
HDD (°C)2501--
CDD (°C)895--
U-Value (W/m²K)
Roof0.12Roof2-
Wall0.24Wall20.43
Floor0.19Floor20.45
Window2.16Window22.16
Others---
Overall U-Value---
Window1Window2
G Value/SHGC0.40.4
Visible Transmission--
Percent--

Other Requirements Set for:

  • Thermal bridge demands
  • Ventilation:
    HVAC Controls - Programmable thermostat required for furnace. Heat Pump requires smart thermostat or lockout feature to prevent unnecessary strip heat. Air system economizers are required and at a lower threshold (33K Btu/h instead of 54K Btu/h)
  • Pressure testing for ducting
  • Domestic Hot Water COP - Heat Pump:
    DHW distribution system requirements
  • Heat Recovery
  • Technical HVAC systems:
    Coefficient of performance of HVAC system is 10-13.0
  • Efficient Lighting

Commercial Buildings - All other (not Group R), Climate Zone 4

GBPN Climate Classification

Heating based

Coefficient for Comparison of Climate Zones

0.00

MeanMinMax
HDD (°C)2501--
CDD (°C)895--
U-Value (W/m²K)
Roof0.15Roof2-
Wall0.28Wall20.6
Floor0.19Floor20.57
Window2.16Window22.16
Others---
Overall U-Value---
Window1Window2
G Value/SHGC0.40.4
Visible Transmission--
Percent--

Other Requirements Set for:

  • Thermal bridge demands
  • Ventilation:
    HVAC Controls - Programmable thermostat required for furnace. Heat Pump requires smart thermostat or lockout feature to prevent unnecessary strip heat. Air system economizers are required and at a lower threshold (33K Btu/h instead of 54K Btu/h)
  • Pressure testing for ducting
  • Domestic Hot Water COP - Heat Pump:
    DHW distribution system requirements
  • Heat Recovery
  • Technical HVAC systems:
    Coefficient of performance of HVAC system is 10-13.0 SEER
  • Efficient Lighting

Commercial Buildings - All other (not Group R), Climate Zone 5

GBPN Climate Classification

Heating based

Coefficient for Comparison of Climate Zones

0.00

MeanMinMax
HDD (°C)2501--
CDD (°C)895--
U-Value (W/m²K)
Roof0.15Roof2-
Wall0.28Wall20.5
Floor0.19Floor20.57
Window2.16Window22.16
Others---
Overall U-Value---
Window1Window2
G Value/SHGC0.40.4
Visible Transmission--
Percent--

Other Requirements Set for:

  • Thermal bridge demands
  • Ventilation:
    HVAC Controls - Programmable thermostat required for furnace. Heat Pump requires smart thermostat or lockout feature to prevent unnecessary strip heat. Air system economizers are required and at a lower threshold (33K Btu/h instead of 54K Btu/h)
  • Pressure testing for ducting
  • Domestic Hot Water COP - Heat Pump:
    DHW distribution system requirements
  • Heat Recovery
  • Technical HVAC systems:
    Coefficient of performance of HVAC system is 10-13.0 SEER
  • Efficient Lighting

Code History and Future Targets

General Process in Setting Requirements:

  • How far in advance are future targets set?:
    3
    Partially, the MBPS is updated every 3 years corresponding to the ICC change cycle. When the ICC updates, Maryland will adopt the newest version. Maryland has a state process to follow to adopt the new codes within six months of the printing.

Zero Energy Targets:

  • All end uses are not included
  • There is not a realistic roadmap in place
  • There is no national target date set for nZEB
  • Special Requirements for public buildings:
    All new public construction and major renovations larger than 7,500 square feet must achieve the LEED Silver level or two Green Globes. 2009 -2014 the state must pay for half the additional cost required for public schools to meet this standard.
  • Links

Number of Earlier Codes

4

Multiple set of data:

  • Levels beyond minimum:
    0
  • Year historic or aspirational codes (planned) :
    1900
  • Baseline (actual code if nothing else):
    IECC 2006
  • Actual level of energy consumption in target
    • Relative target in percent:
      2012 Code is ~30% more stringent than ‘06 version
    • Absolute target:
      2015 Code target is 50% > than ‘06 version

Supporting Measures

Incentives/Rewards to Encourage People to go beyond Minimum Level?

Sales and Use Tax Exemption for Renewable Energy Equipment, Solar Renewable Energy Certificates (SRECs), Local Option - Clean Energy Loan Program, Be SMART Home Efficiency Loan Program, Be SMART Multi-Family Efficiency Loan Program, Home Energy Loan Program.

Involvement of Stakeholders in the Development of Codes

Open process, during the adoption and legislative period numerous complaints about the code are received as well as request to make it more stringent. State officals have final say in what is adopted adopted unless it is mandated by legislation.

Level of Training Provided to Stakeholders Following Implementation of Code?

DHCD have hosted a series of official trainings on the 2012 ICC codes throughout the state in the last 2 years.

Provision of Appropriate Information for General Public

Through state run training seminars.

Education Systems to Ensure Capacity

Through state run training seminars.

Supporting Labeling Schemes

Energy Star.

Supporting Certification Schemes

Energy Star.

Codes Free to Access?

http://www.iccsafe.org/Store/Pages/Product.aspx?id=3800X12

Text on Code Access

http://mdcodes2.umbc.edu/files/MBPS%20-%20Final%20Regulations%20-%20Effective%20January%201,%202012.pdf