7.8102.3 On-Demand Appliance

Topic: 
Water Heating
Subtopic: 
Installation and Replacement
Desired Outcome: 
Safe and reliable hot water source provided that meets occupant needs at lowest possible cost of ownership
Note: 
The authority having jurisdiction may require that a licensed professional perform certain tasks outlined in this detail.
TitleSpecification(s)Objective(s)
7.8102.3a
Hazardous material removal

Health concerns in the removal and replacement of equipment (e.g., asbestos, other hazardous materials) will be identified

Written notification will be provided to occupants of the discovery of hazardous material, including contact information for regional EPA EPA U.S. Environmental Protection Agency, www.epa.gov asbestos coordinator

Occupants will be asked to contract with an EPA EPA U.S. Environmental Protection Agency, www.epa.gov -certified asbestos contractor to conduct abatement before equipment removal and replacement (occupant is responsible for abatement or remediation)

Remediate health hazards using EPA EPA U.S. Environmental Protection Agency, www.epa.gov -certified contractors

7.8102.3b
Equipment removal

Accepted industry procedures and practices will be followed to:

  • Remove old water heater and associated components in accordance with IRC IRC International Residential Code
  • Seal any unused chimney openings and penetrations in accordance with IRC IRC International Residential Code
  • Remove unused oil tank, lines, valves, and associated equipment in accordance with IRC IRC International Residential Code

All work shall be completed by a licensed plumbing professional where required by the authority having jurisdiction and installed to industry-accepted standards

Ensure the safety of the workers and occupants

Preserve integrity of the building

Remove old equipment in a timely and efficient manner

7.8102.3c
New equipment installation

A new water heater and associated components will be installed to accepted industry standards, in accordance with the IRC IRC International Residential Code , authority having jurisdiction and manufacturer specifications

Ensure the safety of the workers and occupants

Preserve integrity of the building

Remove old equipment in a timely and efficient manner

7.8102.3d
Emergency drain pan

An emergency drain pan and drain line shall be installed in accordance with the IRC IRC International Residential Code

Collect and safely dispose of water escaping from the storage tank

7.8102.3e
Temperature and pressure relief valve

Correct temperature and pressure relief valve will be installed in compliance with IRC IRC International Residential Code and according to manufacturer specifications

Temperature and pressure relief valve discharge tube will be installed in accordance with IRC IRC International Residential Code

Discharge excessive energy (pressure or temperature) from storage tank to safe location

7.8102.3f
Dielectric unions

Dielectric unions will be installed to accepted industry standards, in accordance with the IRC IRC International Residential Code and according to manufacturer specifications

Break the stray voltage electrical circuit through the storage tank

7.8102.3g
Backflow prevention and pressure regulator

Backflow prevention will be installed in accordance with manufacturer specifications

House water pressure and volume will be verified as sufficient to be in accordance with manufacturer specifications

All applicable codes will be followed

Protect the water supply from contamination

Provide for sufficient volume and pressure

7.8102.3h
Thermal efficiency

Any accessible hot water lines at the appliance will be insulated to meet IRC IRC International Residential Code or local requirements, whichever is greater.

Reduce line losses

7.8102.3i
Required combustion air

Electric or fossil fuel supply components will be installed to accepted industry standards as per IRC IRC International Residential Code , NFGC and NFPA NFPA National Fire Protection Association, www.nfpa.org 31 and 54 for gas and oil, or NEC NEC National Electrical Code for electric

Energy input required by the appliance will be in accordance with manufacturer specifications

All on-demand appliances will be installed per manufacturer recommendations/specifications

Ensure adequate combustion air for operation of the appliance

7.8102.3j
Venting of flue gases

Combustion byproducts will be removed in accordance with IRC IRC International Residential Code , authority having jurisdiction, and manufacturer specifications

Ensure the safety and durability of the venting system

7.8102.3k
Flue gas testing

Undiluted flue gases will be checked with a calibrated combustion analyzer in accordance with BPI BPI Building Performance Institute, www.bpi.org -1100-T

If combustion is not in compliance with BPI BPI Building Performance Institute, www.bpi.org -1100-T, diagnostics and adjustments will be done to manufacturer specifications or local codes

Confirm that combustion is occurring safely with maximum efficiency

7.8102.3l
Electric and fossil fuel supply

Electric or fossil fuel supply components will be installed to accepted industry standards as per IRC IRC International Residential Code , NFGC and NFPA NFPA National Fire Protection Association, www.nfpa.org 31 and 54 for gas and oil, or NEC NEC National Electrical Code for electric

Energy input required by the appliance will be in accordance with manufacturer specifications

Provide sufficient fuel to the water heater burner or element

7.8102.3m
Cold water supply

The volume and pressure of the water supplied to the appliance will be in accordance with manufacturer specifications

Provide sufficient volume and pressure of water to the appliance

7.8102.3n
Discharge temperature

Discharge temperature will be set in accordance with manufacturer instructions and in compliance with local codes

Use extreme caution when temperature setting is above 120°F

Ensure safe hot water supply temperature to fixtures

7.8102.3o
Commissioning of system

The following will be checked once the system has been connected and filled:

  • Safety controls
  • Combustion safety and efficiency
  • Operational controls
  • Fuel and water leaks
  • Cycle unit
  • Local code requirements

Manufacturer specifications and all relevant industry standards will be met in commissioning

Ensure system functions safely with lowest possible cost of ownership

7.8102.3p
Ambient carbon monoxide ( CO CO Carbon monoxide )

All homes will have a CO CO Carbon monoxide alarm

Ensure occupant health and safety

7.8102.3q
Occupant education

Completed work will be reviewed

Occupants will be educated on the safe and efficient operation and maintenance of the system, including:

  • Adjustment of water temperature and target temperature in accordance with local code
  • Operation of backflow preventer and pressure regulator (no occupant maintenance required)
  • Importance of keeping operating manuals accessible

Ensure occupant is informed of the safe, efficient operation and maintenance of the system

TitleSpecification(s)Objective(s)
7.8102.3a
Hazardous material removal

Health concerns in the removal and replacement of equipment (e.g., asbestos, other hazardous materials) will be identified

Written notification will be provided to occupants of the discovery of hazardous material, including contact information for regional EPA EPA U.S. Environmental Protection Agency, www.epa.gov asbestos coordinator

Occupants will be asked to contract with an EPA EPA U.S. Environmental Protection Agency, www.epa.gov -certified asbestos contractor to conduct abatement before equipment removal and replacement (occupant is responsible for abatement or remediation)

Remediate health hazards using EPA EPA U.S. Environmental Protection Agency, www.epa.gov - certified contractors

7.8102.3b
Equipment removal

Accepted industry procedures and practices will be followed to:

  • Remove old water heater and associated components in accordance with IRC IRC International Residential Code
  • Seal any unused chimney openings and penetrations in accordance with IRC IRC International Residential Code
  • Remove unused oil tank, lines, valves, and associated equipment in accordance with IRC IRC International Residential Code

All work shall be completed by a licensed plumbing professional where required by the authority having jurisdiction and installed to industry-accepted standards

Ensure the safety of the workers and occupants

Preserve integrity of the building

Remove old equipment in a timely and efficient manner

7.8102.3c
New equipment installation

A new water heater and associated components will be installed to accepted industry standards, in accordance with the IRC IRC International Residential Code , authority having jurisdiction, and manufacturer specifications

All work shall be completed by a licensed plumbing professional where required by the authority having jurisdiction

Ensure the safety of the workers and occupants

Preserve integrity of the building

Remove old equipment in a timely and efficient manner

7.8102.3d
Emergency drain pan

An emergency drain pan and drain line shall be installed in accordance with the IRC

Collect and safely dispose of water escaping from the storage tank

7.8102.3e
Temperature and pressure relief valve

Correct temperature and pressure relief valve will be installed in compliance with IRC IRC International Residential Code and according to manufacturer specifications

Temperature and pressure relief valve discharge tube will be installed in accordance with IRC IRC International Residential Code

Discharge excessive energy (pressure or temperature) from storage tank to safe location

7.8102.3f
Dielectric unions

Dielectric unions will be installed to accepted industry standards, in accordance with the IRC IRC International Residential Code , and according to manufacturer specifications

Break the stray voltage electrical circuit through the storage tank

7.8102.3g
Backflow prevention and pressure regulator

Backflow prevention will be installed in accordance with manufacturer specifications

House water pressure and volume will be verified as sufficient to be in accordance with manufacturer specifications

All applicable codes will be followed

Protect the water supply from contamination

Provide for sufficient volume and pressure

7.8102.3h
Thermal efficiency

Any accessible hot water lines at the appliance will be insulated to meet IRC IRC International Residential Code or local requirements, whichever is greater

Reduce line losses

7.8102.3i
Required combustion air

Recommendations will be made to install all on-demand appliances as sealed combustion

If not possible:

Combustion and ventilation (excess air) requirements of gas-fired appliances, including provision of outside and inside air to account for building tightness, will be provided

The minimum required volume shall be 50 cubic feet per 1,000 Btu BTU British thermal unit /h in accordance with IRC IRC International Residential Code

If needed, additional combustion air will be provided in accordance with IRC IRC International Residential Code

Ensure adequate combustion air for operation of the appliance

7.8102.3j
Venting of flue gases

Combustion byproducts will be removed in accordance with IRC IRC International Residential Code and manufacturer specifications

Ensure the safety and durability of the venting system

7.8102.3k
Flue gas testing

Undiluted flue gases will be checked with a calibrated combustion analyzer in accordance with BPI BPI Building Performance Institute, www.bpi.org -1100-T

If combustion is not in compliance with BPI BPI Building Performance Institute, www.bpi.org -1100-T, diagnostics and adjustments will be done to manufacturer specifications or local codes

Confirm that combustion is occurring safely with maximum efficiency

7.8102.3l
Electric and fossil fuel supply

Electric or fossil fuel supply components will be installed to accepted industry standards as per IRC IRC International Residential Code , the NFGC, NFPA NFPA National Fire Protection Association, www.nfpa.org 31, 54, and 58 for gas and oil, or NFPA NFPA National Fire Protection Association, www.nfpa.org 70 National Electric Code for electric

Energy input required by the appliance will be in accordance with manufacturer specifications

Provide sufficient fuel to the water heater burner or element

7.8102.3m
Cold water supply

The volume and pressure of the water supplied to the appliance will be in accordance with manufacturer specifications

Provide sufficient volume and pressure of water to the appliance

7.8102.3n
Discharge temperature

Discharge temperature will be set in accordance with manufacturer instructions and in compliance with local codes

Use extreme caution when temperature setting is above 120°F

Ensure safe hot water supply temperature to fixtures

7.8102.3o
Commissioning of system

The following will be checked once the system has been connected and filled:

  • Safety controls
  • Combustion safety and efficiency
  • Operational controls
  • Fuel and water leaks
  • Cycle unit
  • Local code requirements

Manufacturer specifications and all relevant industry standards will be met in commissioning

Ensure system functions safely with lowest possible cost of ownership

7.8102.3p
Ambient CO CO Carbon monoxide

All homes with combustion appliances or an attached garage will have a carbon monoxide ( CO CO Carbon monoxide ) alarm

Ensure occupant health and safety

7.8102.3q
Occupant education

Completed work will be reviewed

Occupants will be educated on the safe and efficient operation and maintenance of the system, including:

  • Adjustment of water temperature and target temperature in accordance with local code
  • Operation of backflow preventer and pressure regulator (no occupant maintenance required)
  • Importance of keeping operating manuals accessible

Ensure occupant is informed of the safe, efficient operation and maintenance of the system