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City of Hercules

Hercules Municipal Utility (HMU) encourages customers to increase the efficiency of their homes by offering incentives for the following energy efficiency measures:

  • Energy Efficient Lighting
    Periodically the HMU provides customer with coupons for free compact fluorescent light (CFL) bulbs.
  •  ENERGY STAR® Appliances
    HMU encourages its customers to select more efficient ENERGY STAR®-rated appliances by offering generous rebates:
    • Refrigerators: $100 rebate
    • Clothes washers: $75 rebate
    • Dishwashers: $50 rebate
  • Energy Efficient Windows
    Replace your old windows with qualifying new high performance windows and receive a rebate of $1/square foot. High performance windows have a U-Factor of 0.40 or less and a Solar Heat Gain Coefficient of 0.40 or less and qualify as ENERGY STAR® windows.

    For more information on windows, visit the U.S. Department of Energy’s Consumer Guide to Energy Efficiency
  • Insulation
    Keep your house warm in the winter and cool in the summer with additional insulation. If your attic has insulation of R-19 or less, HMU will rebate up to $150 per home to increase the attic insulation level to R-38. Wall insulation of R-11 is rebated at up to $200/home and floor insulation of R-19 qualifies for up to $75/home.

    Get more information on insulation and weatherization
  • Sunscreens
    Sunscreens keep your home cooler by blocking out the hot sunlight in the summer. Hercules Municipal Utility will rebate $1/square foot for sunscreens up to 100 square feet. To qualify, sunscreens must block out 60% of the sunlight.

    Summary of Energy Efficiency Program Rebate Levels
    These are the current rebate levels; they are subject to change.
Measure Required Efficiency Rebate
High Performance

U-Factor of 0.40 or less
SHGC of 0.40 or less

$1/sq. ft.


Provide at least 60% blockage

$1/sq. ft.*


R-19 or less increase to R-38









ENERGY STAR ® w/proof of recycle**


Clothes Washer






*Maximum rebate amount is $100. Rebate may not exceed 50% of total (receipt) cost.

**In order to qualify for rebates, complete the Appliance Rebate Application include all required documentation. Mail or drop off to HMU 111 Civic Drive Hercules, CA 94547**

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Last updated: 4/10/2014 4:35:29 PM