About Us

About Us: First Response Heating & Cooling—Your Trusted Partner for Quality HVAC Solutions

About Us: Our Legacy of Service From Family Roots to Community Commitment

Helping people has been our passion in this industry for many years as Mark Grubb and his mother led the company together from 1978 until 2015 when it was reinvented as First Response Heating and Cooling, reflecting Mark’s selfless service with the local fire department as a fire chief.

We remain a family business with Mark’s cousin Chad now a business partner. Together, they use their 40 years of experience in the HVAC industry to deliver quality work to the residents of Harford county and nearby towns. Since then we have expanded our company portfolio to include light commercial and business-to-business customers in addition to residential.

Core Company Values

About Us Forest Hill, MD

Our Mission

At First Response we strive to provide quality home services for repairs and installation services to home and business owners at a high value in the greater Harford County area. We are committed to meet every customer’s needs and exceed expectations as quickly as we possibly can.


We believe in family, integrity and being comfortable in your home or place of work.

Heating and cooling doesn’t seem very important until it’s not working properly and then it’s a high priority. We take that sense of urgency seriously and believe in a fast response time when issues arise for our customers.

Being comfortable doesn’t only mean getting an issue addressed quickly, but getting it resolved quickly too. We strive to get each job done as fast as possible, so you can get back to the important stuff in life.

Integrity is about what you do all the time, even when it’s not required. We try to always go above and beyond when we can to ensure our customers are satisfied.

We believe family is precious and we treat our staff and our customers the same way we would treat our own family, with respect, kindness and honesty.

Community is something that we are proud to be; as a long-standing business in Harford County, Maryland. We support our local first responders and military whenever we can. Thank you is never enough.

We believe in the American dream and want to help good people maintain part of that dream easily, affordably and reliably.

Commitment To Excellence

The First Response Heating & Cooling commitment to satisfaction spans all of the markets in which we do business. For residential customers, we provide after-sales support, documentation and registration of all equipment and periodic tune ups. For commercial clients, we offer round-the-clock service, zero percent financing and a staff fluent in current business technology.

We have built a respected reputation within the community as one of the best and most responsive HVAC companies in the industry. We strive for complete customer satisfaction and continuing relationships with all of our clients.