PROPOSED ACTION ON REGULATIONS
MARYLAND REGISTER, VOLUME 40, ISSUE 3,
FRIDAY, FEBRUARY 8, 2013
Subtitle 15 BOARD OF HEATING, VENTILATION, AIR-CONDITIONING, AND REFRIGERATION CONTRACTORS
09.15.05 Compliance with International Mechanical Code
Authority: Business Regulation Article, §9A-205, Annotated Code
of Maryland, Annotated Code of Maryland
Notice of Proposed Action
The Board of Heating, Ventilation, Air-Conditioning, and Refrigeration Contractors proposes to amend Regulations
.01 — .03 under COMAR 09.15.05 Compliance with International Mechanical Code. This action was considered
at a public meeting of the Board held on June 13, 2012, notice of which was given by publication in 39:11 Md. R. 729
(June 1, 2012), pursuant to State Government Article, §10-506(c), Annotated Code of Maryland.
Statement of Purpose
The purpose of this action is to incorporate by reference the 2012 International Mechanical Code
and the 2012 International Residential Code for One- and Two-Family Dwellings. The Board further
proposes to adopt revised Maryland modifications and additional provisions to the International Mechanical Code.
Comparison to Federal Standards
There is no corresponding federal standard to this proposed action.
Estimate of Economic Impact
The proposed action has no economic impact.
Economic Impact on Small Businesses
The proposed action has minimal or no economic impact on small businesses.
Impact on Individuals with Disabilities
The proposed action has no impact on individuals with disabilities.
Opportunity for Public Comment
Comments may be sent to Patricia McCray, Administrative Officer, Board of Heating, Ventilation, Air-Conditioning,
and Refrigeration Contractors, 500 North Calvert Street, Third Floor, Baltimore, MD 21202, or call 410-230-6159, or email to
firstname.lastname@example.org, or fax to 410-333-6314. Comments
will be accepted through April 5, 2013. A public hearing has not been scheduled.
Final action on the proposal will be considered by the Board of Heating, Ventilation, Air-Conditioning, and
Refrigeration Contractors during a public meeting to be held on April 10, 2013, at 500 North Calvert Street, Baltimore, MD 21202.
Editor’s Note on Incorporation by Reference
Pursuant to State Government Article, §7-207, Annotated Code of Maryland, the 2012 International
Mechanical Code and the 2012 International Residential Code for One- and Two-Family Dwellings have
been declared documents generally available to the public and appropriate for incorporation by
reference. For this reason, they will not be printed in the Maryland Register or the Code of
Maryland Regulations (COMAR). Copies of these documents are filed in special public depositories
located throughout the State. A list of these depositories was published in 40:1 Md. R. 9 (January 11, 2013),
and is available online. These documents may also be
inspected at the office of the Division of State Documents, 16 Francis Street, Annapolis, Maryland 21401.
.01 Incorporation by Reference.
A. In this chapter, the following [document is] documents are incorporated by
(1) 2012 International Mechanical Code (International Code Council, 500 New Jersey Ave., N.W.,
6th Floor, Washington, D.C. 20001), which has been incorporated by reference in COMAR 05.02.01.02-1B(5), except as
modified by Regulation .02 of this chapter; and
(2) 2012 International Residential Code for One- and Two-Family Dwellings (International Code
Council, 500 New Jersey Ave., N.W., 6th Floor, Washington, D.C. 20001), which has been incorporated by reference
in COMAR 05.02.01.02-1B(4) except Chapters 1-11 and 25-44.
[B.] (proposed for repeal)
[C.] B. (text unchanged)
.02 Modifications to the International Mechanical Code.
A. (text unchanged)
B. Add note to Chapter 1, §101.3: If a conflict arises as to methods of installation, maintenance, and
repair under this Code, [generally accepted trade practices shall be implemented]
the manufacturer’s operation and installation manual or instructions shall
C. Sections Omitted.
(1) Chapter 1, omit sections:
(a) §103.1—.4 (entirely) Department of Mechanical Inspection[s];
(b) §104.1—[.8] .7 (entirely) Duties and Powers of the Code Official[s];
(c) §105.1—[.4] .5 (entirely) Approval;
(d) §106.1—5.3 (entirely) Permits;
(e) §107.1—.6 (entirely) Inspections and Testing;
(f) §108.1—.7.3 (entirely) Violations; [and]
(g) §109.1—.7 (entirely) Means of Appeal[.]
(h) §110.1—.4 (entirely) Temporary Equipment, systems and Uses.
(2) Chapter 9, omit sections:
(a) §902.1 (entirely) Masonry Fireplaces;
(b) §903.1—.3 (entirely) Factory-Built Fireplaces;
(c) §904.1 (entirely) Pellet Fuel-Burning Appliances;
(d) §906.1 (entirely) Factory-Built Barbecue Appliances;
(e) §914.1—5.1 (entirely) Sauna Heaters;
(f) §923.1—1.1 (entirely) Small Ceramic Kilns; and
(g) §925.1 (entirely) Masonry Heaters.
D. Add note to Chapter 3, [§301.11.1] §301.14.1: Temporary repairs may not be made to a damaged
E. Add note to Chapter 3, §306.3: Air-handling units and water heaters installed in attics [in residential
structures] shall be accessible by an opening in accordance with subsections (1) and (2) of this note, below:
(1) Access to the attic opening shall be provided by a permanent or pull-down stairway in all
new construction. In existing installations, portable ladders shall be acceptable.
(2) The passageway from the attic opening to the equipment may exceed 20 feet, subject to job
conditions and approval by the local authority.
[F.] — [H.] (proposed for repeal)
.03 [Additional] Provisions Added to the International Mechanical
A. Assessment of Fees and Penalties. Fees or penalties to be assessed under the
2012 International Mechanical Code[/2000] provisions shall be determined by the administrative
authority for each subdivision.
B. Requirements for Plans and Specifications.
(1) Plans and specifications for the installation of all heating, ventilation, air-conditioning,
or refrigeration systems shall:
(a) Be approved by a licensed Maryland HVACR master, HVACR master restricted
licensed for the system being installed, or a Maryland licensed professional engineer [or architect]; and
(b) Have affixed to them the name and license number of the Maryland HVACR
master, HVACR master restricted licensed for the system being installed, or Maryland licensed professional
engineer [or architect].
(2) [For installations other than one-family and two-family dwellings, adequate]
Adequate details of mechanical and electrical work, including computations, diagrams, and other
essential technical data, shall be filed. All engineering plans and computations shall bear the signature
and license number of the licensed engineer[, architect, or mechanical licensee] responsible for the design.
[For one-family and two-family dwellings, a residential heat gain and loss load calculation, for example,
Manual J or its equivalent, shall be filed for new installations. For replacement of a condensing unit,
air-handling unit, furnace, or boiler in an existing HVACR system in one-family and two-family dwellings,
documentation is required. The document shall reflect the calculations by which the sizing of the equipment
installed was determined. A signed and dated copy of this document shall be retained by the contractor and
a copy shall be left with the homeowner upon completion of the work. Plans shall indicate how required
structural and fire resistance rating integrity will be maintained, and where penetrations will be made
for electrical, mechanical, plumbing, and communication conducts, pipes, and systems.]
C. Permits for Temporary Installations. A temporary permit is required for mechanical equipment
to be installed for a period not to exceed 6 months and shall be issued by the local subdivision where
the installation occurs. The permit may be extended for a 6-month period by the local subdivision.
[D.] — [F.] (proposed for repeal)
Board of Heating, Ventilation, Air-conditioning and Refrigeration Contractors