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It is unlawful for any person to do, or cause to be done, any mechanical equipment installations without first obtaining a mechanical permit from the City of Nampa Building Department authorizing such work to be done.
QUALIFICATION OF INSTALLERS
Any mechanical installations requiring a mechanical permit and inspection as defined in this code shall be installed by a licensed mechanical contractor with a valid Idaho Contractor’s License.
Homeowner Installation: Mechanical installations may be performed by individuals who are the legal owners of group R, divisions 3 _ 4, and group U occupancies as defined by the international building code, and the property to which the structures are attached. Mechanical installations allowed under this exception shall only be permitted if the property owner resides in the dwelling for a period of one hundred eighty (180) days after the installation is completed.
Hardship Cases: Members of the immediate family are allowed to perform mechanical installations including gas piping for family members unable to perform the work for themselves.
Any person engaged in or becoming engaged in the gas piping business or the installation of mechanical equipment is required to secure a license from the state of Idaho.
AMENDMENTS TO THE INTERNATIONAL MECHANICAL CODE AND THE INTERNATIONAL FUEL GAS CODE
IMC and IFGC sections 103.2 "Appointment" is deleted in its entirety.
IMC section 903 "Factory Built Fireplaces" add a new section to read as follows:
The Provisions for Mitigating Indoor Air Pollutants Emitted by Unvented Gas Fireplaces unvented gas fireplaces shall not be permitted without the installation of a supplemental whole-house ventilation strategy, which will serve to provide a non-passive outside fresh air source to the living space during the time of fireplace operation. Such a strategy may be provided through the installation of an approved air-to-air heat exchanger, or an engineered ventilation system designed to mitigate those combustion by-products emitted by the unvented gas burning appliance. The fresh air supply must be activated and operating any time the unvented fireplace is in use
RETRO FIT INSTALLATIONS
Retro fit installations of HVAC equipment and duct work in existing buildings.
In an existing structure when replacing the duct work for the HVAC system, the following criteria shall be followed in order to meet the intent of the International Residential Code and the International Existing Building Code:
- 2018 International Mechanical Code and
- 2018 International Fuel Gas Code
- Shall be properly sized to provide correct air flow, and meet room-by-room calculated heating and cooling loads.
- Shall be installed so that the static air pressure drop across the handler is within manufacturer and design specifications to have the capacity to meet the calculated flows.
- Shall have sealed duct work that will provide proper air flow.
- Shall be installed with a return system sized to provide correct return air flow, and sealed that will provide proper air flow to the fan and avoid air entering the HVAC system from polluted zones, such as fumes from automobile and attic particulates.
- Shall have balanced air flows between the supply and the return systems to maintain neutral pressures in the home.
- Shall minimize the duct air temperature gain or loss between the air handler and room registers, and between return registers and the air handler.
- Shall be properly charged with refrigerant.
- Shall have proper burner operation and proper draft.
- Shall be properly sized to sensible load using ACCA Manuel S procedures.
Mechanical Permit Application