Pipe Insulation for Electric Water Heaters

Pipe Insulation (BPA-Qualified)

The base case (pre-existing state) used to calculate energy-efficiency savings for pipe insulation are both uninsulated hot and cold water pipes connected to an electric water heater. Energy savings are calculated on the reduction of standby losses in the pipes, reducing warm-up times from cold starts, a reduction in tank thermostat set-point, and savings from wastewater treatment resulting from reducing the amount of water wasted from cold starts. Energy savings is provided for two measures: insulating the first six feet of both hot and cold water pipes, and another for insulating all accessible water pipes. BPA Documentation Requirements for this BPA Qualified measure consider these factors.

Requirements and Specifications

This measure is available for all types of residential buildings (single-family, manufactured and multifamily) with an electric water heater. Customers may claim only one measure per project. Both Short and Whole House insulation measures must meet the following requirements:

Hot and cold pipes must be insulated with a minimum of R-3 closed cell foam insulation for at least the first three feet past the water heater and if accessible, up to six feet adjacent to the water heater.

Insulation material, jackets or facing, and adhesive (if used) must have a flame spread/smoke density rating in accordance with ASTM E-84.

Pipe insulation must not cover pressure relief valves, handles, safety drain valves or any other safety control device.

All pipe elbows and joints must be mitered to ensure coverage at the same thickness as straight runs.

Pipe insulation must be secured with twine, corrosion resistant wire, or plastic compression ties every 12 inches and within three inches of the ends.

For the Whole House insulation measure, insulation must be installed on all accessible hot water pipes. If hot water pipes (trunk and branch lines) are already covered with floor or attic insulation, the project is not eligible.

Documentation Requirements

1. City of McCleary Pipe Insulation Rebate Application.
2. Equipment/contractor invoice showing;
   
   1. the measure requirements have been met (e.g., manufacturer, model number, type, size and quantity of equipment or product installed/used),
   2. the order/purchase date, and
   3. cost
3. City of McCleary Plumbing Permit Application.