Ensure Comfort with Expert HVAC Installation

Schedule Residential HVAC Installation in Baltimore County

A reliable HVAC system is crucial for maintaining comfort and efficiency in your home. At Diagnostic Heating and Air Conditioning, we specialize in installing new systems tailored to your home's layout and heating/cooling needs in Randallstown, Ellicott City, Owings Mills and surrounding areas. You’ll appreciate the precision of our custom ductwork design and fabrication, ensuring perfect airflow throughout your home. Imagine the peace of mind knowing your installation is handled by experts who prioritize your comfort and satisfaction.


We begin with a free in-home estimate to determine the best options for your space. Using high-quality equipment from Goodman, Lennox, or Carrier, we complete most installations in about one day. Plus, we handle all necessary permits and inspections, so you can relax knowing everything is taken care of. Whether you're moving into a new home or upgrading to a more efficient system, we ensure the job is done right the first time.


Book your home HVAC system setup with us today and enjoy a more comfortable home.

White air conditioner mounted on a white wall above two unfinished doorways.

What to Expect When You Book

When you choose us for your residential HVAC installation, you can expect a seamless and efficient process. Our team is committed to delivering top-quality service and ensuring your satisfaction. Here’s what you can look forward to:


  • Free in-home estimate to assess your needs
  • Custom ductwork for optimal airflow
  • Installation of high-quality equipment
  • Completion in about one day
  • All permits and inspections managed for you


Plan your HVAC installation with our expert team today.