R.D. Smith Heating & Air Conditioning is San Gabriel Valley’s trusted HVAC & plumbing company. With over three decades of experience, we have earned a reputation for delivering the best value in heating and air conditioning installation, replacement, repair, and maintenance services. We’re also highly qualified to provide a complete range of plumbing services, including leak repair, copper repiping, drain cleaning, and more. Call today to experience our award winning service and see why homeowners, businesses, and general contractors throughout Glendora, Covina, San Dimas, Azusa, and La Verne rely on R.D. Smith to get the job done right.