- In 2007, DHA signed a contract with Honeywell to implement an energy efficiency program. This program would decrease utility costs through renewable energy upgrades. Cost savings amount to $1.8 million dollars, and the program will impact 3,700 public housing units. Improvements include a geothermal heating and cooling system. DHA also worked with Xcel Energy to convert light bulb throughout their properties. Over 100 trees were planted by DHA staff and residents as part of the Mayor’s Million Tree Initiative. DHA has actively been involved in regional planning efforts to extend public transit and develop Transit Oriented Developments with proximity to existing public housing.