Green Horizon - North Carolina's leader in HVAC, Insulation and Crawl Space services. Save money on utilities and make your home greener, healthier and more comfortable with a complete system review by Durham's experts in home efficiency. Everything we do is guided by our Four Principles: LOWER UTILITIES | A BETTER ENVIRONMENT | HEALTH | COMFORT We see your home as a complete system and because we aren’t tied to any one technology or solution, we will always recommend the best solution for your home. If you contact us about insulation, but we think a new HVAC system would be a better investment – we’ll let you know. Schedule an appointment and we'll map out the most effective path to greening your home.