Reposted from someone who put on Ruby Hill Neighborhood. (Not Me)
Hi neighbors! I just had Energy Resource Center come and blow insulation into my walls, add weather stripping to my doors, add 17(?) inches of insulation in my attic, line my crawlspace with plastic and seal around the foundation, seal all my can lights and replace all my bulbs with LED bulbs - for FREE!!! They did an excellent job and cleaned up afterward - even plugged the walls and texturized where they blew in the insulation.
They are a non-profit, and depending on your income, it can either be free or greatly discounted. They are awesome! (720) 236-1342