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About Us

Our 20th Year!

Chris Lenhard formed Calvert Mechanical Systems as a Delaware corporation in the late summer of 1991. The company was named in honor of Chris' paternal grandfather, Vance Calvert. To make it easier for consumers to understand our business model, we market our business as Calvert Heating and Cooling.

The Owners

Chris Lenhard and David Murray are 50/50 owners of the company.

David Murray learned his trade and became a Master Mechanic at Kelly Heating and Cooling, installing and replacing everything from 50-ton commercial rooftop units to tiny 40,000 btu gas furnaces in the rowhomes of Wilmington. David works in the business every day and holds the responsibility of Sales and System Design Manager.

Chris Lenhard learned his trade and became a Master Service Technician at a local refrigeration company that serviced everything from simple residential oil burners to the most complicated of cascade freezers. Chris works in the business every day as Technical Trainer and General Manager.

The intensive and diverse skills learned as apprentices and then executed as journeymen have served Dave, Chris, Calvert and our customers well. Knowing how the big picture works allows us to understand and prevent problems in the small scale found in residential and light commercial work.

Our Business Philosophy

We want to operate a great business that provides outstanding service, and a fair profit in return. We won't be the guys that cut corners or say one thing but mean another - instead we are the other guys that do it right, put it in writing, and let you know your complete cost - upfront.

Our People

We have approximately 30 people in the office and field. We think we're pretty good judges of We have approximately 30 people in the office and field. We think we're pretty good judges of character, but because we may be working in your home, we're not taking a chance. We run everyone through a Sue Weaver C.A.U.S.E. background checking system. This occurs at preemployment and then annually thereafter. Because drugs are so prevalent in our society, again we don't take a chance. Every 3 months we randomly test 25% of our co-workers for drug use. It may sound negative, but we're the only heating/cooling company we know that's doing it. It has prevented many technically qualified, but otherwise sketchy people, from entering our customer's homes.

Ongoing Training

Chris spends at least 3 hours a week on technically training the technicians. Three hours may not sound like a lot, but the other guys spend no time training. Heating and air conditioning is a technically challenging industry. because it requires proficiency in oil and gas combustion, thorough understanding of electricity, principles of refrigeration, government codes, EPA regulations, and perhaps the toughest — customer service skills.

Charity and Sponsorships

• We created and partner with the annual WSTW/WDEL Coat Drive that benefits the Ministry of Caring in Wilmington, held every year in the Fall;
• We are a sponsor for NAMI Delaware's Walk for the Mind of America every Spring;
• We sponsor two teams in the Newark National Little League—the minor league Phillies, and the major league Yankees.

Affiliated Companies

• Lincoln Oil - heating oil delivery to residential customers at the lowest prices in the area;
• Benjamin Franklin Plumbing - the "Punctual Plumber" providing quality residential service;
• Gentle Ben Electric - "America's Huggable Electrician" services residential and commercial customers.