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Important Note:
Massachusetts Code Requirement
For sidewall vented appliances with vent terminals located less than 7 feet above grade.
1.
Massachusetts Code requires that a CO Detector and Alarm, listed by an approved third party
inspection agency to ANSI/UL 2034 and complying with NFPA720 (2005 Edition) be installed on
each floor level in which there are bedroom(s), if there is not one already present. The location
shall be in the living space outside the bedroom(s).
2. An additional CO Detector and Alarm, as indicated above, shall be located in the room that
houses the appliance and shall be powered by the same electrical supply as the appliance such
that one service switch serves both the appliance and the CO detector. The CO detector shall
have a battery backup.
3. The vent terminal, and if applicable the air intake terminal, shall be the approved Laars
terminals. A copy of this manual shall remain with the appliance at the completion of the
installation.
4. A metal or plastic identification plate shall be permanently mounted to the exterior of the
building at a minimum height of eight (8) feet above grade directly in line with the exhaust vent
terminal for the horizontally vented gas fueled heating appliance or equipment. The sign shall
read, in print size no less than one-half (1/2) inch in size, “GAS VENT DIRECTLY BELOW.
KEEP CLEAR OF ALL OBSTRUCTIONS”.
For Sidewall Vented Appliances with Vent Terminal Located More Than 7 Feet above
grade:
Items 1, 2 and 3 above shall apply. Follow the Installation Instructions provided with the CO
Detectors when installing them. For issues with the CO Detectors, contact the installing
contractor.