Happy July 4th

Happy July 4th from D-N-D Services

D-N-D Services Rockwall|Greenville

D-N-D Services is proud to announce we have an A+ accredited rating with the Better Business Bureau. D-N-D Services is the  #1 Carrier Factory Authorized Dealer in Rockwall. Carrier Factory Authorized Dealers have earned their distinction—it’s not “given” to them. And it’s not about what they are, but what they’ve done and continue to do… [Continue Reading]

Merry Christmas from D-N-D Services

    Christmas is a time for cherishing those who bring so many blessings to our lives. Christmas is a great  season of our year that brings with it joy, love, and heartwarming thoughts.  Christmas magically allows us to convey  love, concern and sincere thoughts in just the right way to almost anyone we know… [Continue Reading]

Happy Thanksgiving

Happy Thanksgiving from DND Services

Its like a Flu Shot for your home or office

Is your home protected? There is unique NASA developed air purification technology available for installation today in homes, schools, and offices.  You can breathe better and more safely. Proven effective in the air and on surfaces Kills bacteria, mold, and viruses including Reduces odors,particulates,smoke, and voc’s Kills 99% of sneeze germs within 3 feet Conglomerates sub-micron… [Continue Reading]

How to set thermostat in a two story house in summer

Temperatures Upstairs and Downstairs Here at D-N-D Services, we are often asked how to set thermostats in a two story home. For two story homes balancing the air temperature is a little more complicated than in a single story home. Almost everyone knows heat rises and cold air falls. This is called thermal convection and can… [Continue Reading]

Indoor Air Quality Facts | Indoor Air Quality Solutions

Indoor Air Quality Facts and Indoor Air Quality Solutions Indoor air quality facts and indoor air solutions for Rockwall , Plano , Heath, Dallas, Greenville, and surrounding areas by DND Services. Improve the air you breathe.  Take 6 minutes to watch a video on your homes indoor air quality. Do you know what is in the… [Continue Reading]

Improve Your Air Quality |School, Office and Commercial

Indoor Air quality Do you know what is in the air you breathe? Allergies?   Too much dust?  Unwanted odors?  Spreadable viruses? Indoor air quality can be up to five times more polluted than outdoor air. The Environmental Protection Agency estimates that people spend up to 90% of their time inside at school, work, home, and other… [Continue Reading]