© Submitted by Darcy and Darren Crichton Darcy and Darren Crichton outside their net-zero bungalow. What started as a small renovation project turned into a fight against climate change for an Edmonton couple who have spent over two decades transforming their bungalow into a net-zero home. Darren said he promotes solar energy to anyone wanting to reduce their reliance on the electricity grid. Under the HERA program, homeowners can add better insulation, triple-pane windows, and a newer heating system. About 2,000 Edmonton residents are taking part in the HERA program.