248 CMR 5.10
Modifications to Chapter 10, Installation of Specific Equipment
10.1.2 Installation in a Bedroom or Bathroom. Gas utilization equipment shall not be installed
so its combustion, ventilation, or dilution air is obtained from a bedroom or bathroom:
EXCEPTION: Type 1 clothes dryers may be installed in bathrooms when the air for combustion
and ventilation is introduced to the space in accordance with the following:
(a) A single air intake shall be installed and the minimum size of the single air intake shall
be equal to the size of the exhaust vent area of the dryer, and:
(b) The air for combustion shall not be obtained from a bedroom or bathroom, and;
(c) The air for combustion shall be obtained from a space that is sized in compliance with
Section 9.3, and:
(d) The dryer is installed in compliance with Section 10.4.
(6) Delete sub-section 10.3.5 and replace with the following:
10.3.5 Safety Control. Each steam and hot water boiler shall be equipped with a control which
will prevent firing of the boiler in the event of insufficient water in the boiler.
10.6.1 Prohibited Installations.
(a) Decorative appliances that are designed for installation in vented fireplaces when
installed in bedrooms or bathrooms shall be Direct Vent Appliances as defined in sub-section
3.3.6.3.
(b) When decorative appliances are installed in vented fireplaces other than bedrooms and
bathrooms, the flue damper shall be removed or welded in a fully open position.
10.7.1 Prohibited Installations. Vented gas fireplaces installed in bedrooms or bathrooms shall
be Direct Vent Appliances as defined in sub-section 3.3.6.3.
(14) Add a new sub-section 10.8.2.3 as follows:
Direct Gas-fired Industrial Air Heaters may not be utilized unless the manufacturer has specified
that there is no more than 50 P.P.M. of Carbon Monoxide in the total volume of air discharged
from the unit.
(15) Add a new sub-section 10.9.2.3 as follows:
Direct Gas-fired Industrial Air Heaters may not be utilized unless the manufacturer has specified
that there is no more than 50 P.P.M. of Carbon Monoxide in the total volume of air discharged
from the unit.
(16) Delete sub-section 10.12.2 and replace it with the following:
10.12.2 Prohibited Appliances. The following equipment shall be prohibited:
(a) gas range ovens, broilers, or top burners for space heating purposes;
(b) gas ranges with match-lit ovens;
(c) any commercial cooking range without a listed oven safety pilot; and
(d) appliances not in compliance with the statutory requirements of M.G.L. c. 148, § 25E.
(17) Add a new sub-section 10.12.9 as follows:
10.12.9 Gas Valves Installed for Fire Protection/Suppression Systems.
(a) All gas valves shall be mechanical type with manual reset and shall be installed in close
proximity to the cooking equipment and shall shut off the gas supply to the equipment served
by the hood and duct system protected by the extinguisher/suppression system.
(b) A permanent notice shall be posted at the reset device and gas meter or propane
regulator cautioning the operator to shut off the gas to all appliances before resetting the
device.
(c) Actuation of the gas valve shall be made in the presence of the Inspector at the time of
the gas piping tests.
(21) Delete sub-section 10.15.1.1(4).
(23) Delete sub-section 10.18.2(2).
(26) Delete sub-section 10.21.2(3).
(29) Delete sub-section 10.23.1* and replace with the following:
10.23.1* Prohibited Installations.
(a) Room heaters shall not be installed in bathrooms, bedrooms, or other sleeping quarters
unless permitted by M.G.L. c. 148, § 25A and 527 CMR 30.04: Installation.
(b) Exception: Notwithstanding sub-section 10.23.1*(a), room heaters may be utilized
which are direct vented as defined in sub-section 3.3.6.3.
(30) Replace sub-section 10.23.2 with the following:
10.23.2 Unvented Room Heaters.
(a) Unvented room heaters shall be installed in accordance with M.G.L. c. 148, § 25A and
527 CMR 30.00: Unvented Propane or Natural Gas-fired Space Heaters.
(b) With regards to the installation of unvented room heaters, in the event of a conflict
between 248 CMR 5.00 and M.G.L. c. 148, §25A and 527 CMR 30.00: Unvented Propane
or Natural Gas-fired Space Heaters, the provisions of M.G.L. c. 148, § 25A and 527 CMR
30.00: Unvented Propane or Natural Gas-fired Space Heaters shall prevail.
(c) In addition to complying with the permit requirements of 248 CMR 3.00: General
Provisions Governing the Conduct of Plumbing and Gas Fitting Work Performed in the
Commonwealth, a permit shall be obtained from the head of the fire department.
(d) A final inspection by the Inspector shall not be performed until proof is provided that
the head of the fire department having jurisdiction has granted a permit.
(e) Installations shall be of a permanent type, with a permanently piped fuel supply. LPG
appliances shall be subject to the storage requirements in accordance with 527 CMR
6.00: Liquefied Petroleum Gas Containers and Systems.
(f) Unvented room heaters shall not exceed a maximum of 40,000 BTU input per room or
space.
(g) At least one listed carbon monoxide detector, that is installed in accordance with the
manufacturer's instructions, shall be installed and maintained in the same room where the
heater is located, or otherwise in the location specified by the manufacturer's instructions.
(h) Unvented room heaters may not be the primary source of heat for any room or building.
10.23.4 Clearance. A room heater shall be placed so as not to cause a hazard to walls, floors,
curtains, furniture, doors when open, and so on, and to the free movements of persons within the
room. Heaters designed and marked "For use in noncombustible fireplace only" shall not be
installed elsewhere. Only listed room heaters shall be installed and must be installed in
accordance with the manufacturer's installation instructions. In no case shall the clearances be
such as to interfere with combustion air and accessibility.
(33) Add a new-subsection 10.24.2 as follows:
10.24.2 Stationary Gas Engines Used for Life/Safety. When a dedicated gas fuel line is installed
for a stationary gas engine used for life/safety purposes, it shall be installed immediately
downstream of the meter assembly or shut off valve (if no meter is provided) and shall meet the
following requirements:
(a) The fuel line for the stationary gas engine and the fuel line for the remaining appliances
shall have shut off valves installed immediately downstream of the meter assembly to enable
each line to operate independently;
(b) When pressure regulators are installed, they shall enable each fuel line to operate
independently and not adversely affect the gas pressure of the other fuel line, and:
(c) The fuel line for the stationary gas engine shall be labeled at each shutoff valve with the
following:
WARNING: Gas Used for Life/Safety, Avoid Shutting Off Gas Unless Necessary
(34) Delete sub-section 10.26.2.1(2).
(35) Delete sub-section 10.26.2.2(3).
Listed outdoor open flame decorative appliances do not require any product acceptance under
248 CMR 3.00: General Provisions Governing the Conduct of Plumbing and Gas Fitting Work
Performed in the Commonwealth.
(41) Add a new section 10.33 as follows:
10.33 Gas-fired Kilns. Gas Fired Kilns must meet product acceptance requirements in
248 CMR 3.00: General Provisions Governing the Conduct of Plumbing and Gas Fitting Work
Performed in the Commonwealth.