Markool Heating & Cooling | Trusted Plumbing Contractor in Frederick, MD

We provide a comprehensive range of services, including HVAC installation, repair, and maintenance, air duct cleaning and sanitization, and plumbing installations such as water heaters, sinks, toilets, and gas lines. Our team is trained to handle both residential and commercial needs, ensuring reliable solutions for heating, cooling, and plumbing in Frederick and surrounding areas.

For old pipe leaks, our experienced technicians conduct thorough plumbing inspections to identify weak spots and recommend durable replacements using quality materials. For toilet seal leaks, we offer precise installation or repair services to prevent water damage and improve efficiency. We focus on long-term solutions tailored to Frederick's older housing stock, helping residents maintain their plumbing systems effectively.

With over 20 years of combined experience and NATE certification, our team provides expert HVAC maintenance to keep your systems running efficiently. We offer personalized service, competitive pricing, and use Carrier products as a Factory Authorized Dealer. Regular maintenance helps prevent breakdowns, extends system life, and ensures comfort for your home or business in Frederick's climate.