Category Archives: Mechanical

2015 Residential Code for Gas Pipe Support

The 2015 Residential Code (G2418) requires gas pipe  support both vertically and horizontally.  Horizontal support spacing distances vary by pipe diameter and can be found in table G2424.1.  The distance varies anywhere from six to ten feet depending on pipe … Continue reading

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Filed under Mechanical

Residential Code requirement for gas line testing

The 2012 International Residential Code (G2417.1) requires installation of gas piping to be visually inspected and pressure tested to ensure materials, design and fabrication meet code requirements. The code (G2415.19) also requires the testing of all gas piping before it … Continue reading

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Filed under Mechanical

Residential Code requirement for mechanical exhaust termination

  The 2012 International Residential Code (M1506.2) requires exhaust openings to terminate a minimum distance of three feet from any operable or non-operable opening. These types of openings may include; windows, doors, vents, etc. The code (R303.5.2) also does not … Continue reading

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Filed under Mechanical

Residential Code requirement for appliance support and ground clearance

  The 2012 International Residential Code (M1403.2) requires heating and cooling equipment to be set on a support or foundation. The foundation must be raised at least 3” above the ground. A second reference to ground clearance and support (M1305.1.4.1) … Continue reading

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Filed under Mechanical

Residential Code requirement for transition clothes dryer duct

The Residential Building Code sets certain conditions on how dryer transition ducts can be used.  Information regarding transition ducting can be found in the mechanical portion of the code (M1502.4.3), and in the gas chapter (G2439.5.4). The transition duct must … Continue reading

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Filed under Mechanical

Residential Code requirement for sediment trap

The Residential Building Code (G2419.4) requires the installation of sediment traps on certain appliances.  If the sediment trap is not incorporated into the appliance, it must be installed at a location downstream of the shutoff valve. The trap itself can … Continue reading

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Filed under Mechanical

Residential Code requirement for attic lighting

The mechanical section of the Residential Code requires lighting in both the attic (M1305.1.3.1), and the crawlspace (M1305.1.4.3) of homes where mechanical equipment is located.  The language is the same for both locations and requires the installation of a luminaire … Continue reading

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Filed under Mechanical

Residential Code requirement for water heater seismic traps

The Residential Building Code (R301.2.2.3.7) requires the use of straps or anchors on water heaters in certain seismic locations.  The requirement for straps can be found in both the mechanical section of the code as well as the plumbing section. … Continue reading

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Filed under Mechanical, Plumbing

Residential Code requirement for bathroom ventilation

The building code requires light and ventilation to bathrooms by means of a window.  The window must have a minimum dimension of 3 square feet, with one half of the area openable. Many times it is not possible to have … Continue reading

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Filed under Mechanical

Residential Code requirements for clothes dryer duct

The residential building code (M1502.1) lists several requirements regarding the installation of clothes dryer exhaust vents. These code requirements are necessary to help minimize the possibility of a duct related fire. According to a report from FEMA, in 2012 there … Continue reading

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Filed under Mechanical

Residential Code requirement for appliance clearance in attic

The residential code lists clearance requirements for appliances in several areas of the mechanical code section.  The fist reference to clearances can be found in section M1305.1 which covers general access guidelines for all appliances. The specific requirements for appliances … Continue reading

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Filed under Mechanical

Residential Code requirement for appliance protection in the garage

The building code requires appliances which are located in the garage to be either elevated or protected to prevent accidental impact.  The mechanical portion of the code (M1307.3.1) does not specifically mandate the use of bollards, but does require the … Continue reading

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Filed under Mechanical

Residential Code requirement for dryer duct label

The maximum length of a dryer duct is determined by the manufacturer.  If the manufacture does not list a maximum length, the code sets the maximum length at 35 feet, which may then be further reduced by the use of … Continue reading

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Residential Code requirment for elevation of water heaters

It is not uncommon to find water heaters elevated in a garage.  The building code (M1307.3) (G2408.2)requires appliances with an ignition source to be elevated a minimum of 18 inches above the floor in order to minimize the risk of … Continue reading

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Filed under Mechanical, Plumbing