Welcome to Mullan Mechanical - the HVAC Company that residential and commercial customers in Howard, Carroll, Frederick, Baltimore, Anne Arundel and Montgomery County, Maryland choose for quality Heating and Cooling services. Mullan Mechanical are locally owned and operated as well as licensed, insured and certified in all areas of our trade. We have over 30 years’ experience! We offer sales, inspections, installations, replacements, upgrades, troubleshooting, repairs, tune ups, maintenance and service of air conditioners, evaporative coolers, furnaces and boilers. We also offer humidifiers, dehumidifiers, purifiers and ventilation systems to assist with your air quality needs. Mullan Mechanical offers the most complete HVAC system inspections and maintenance agreements to ensure your system keeps operating like it should. If however, your air conditioning or heating system does fail in your home or business, we can replace or repair it quickly and easily with minimum disruption. We service and install all brands, makes and models and also offer Financing for your convenience. We stand by our quality HVAC Services and strive to leave our customers comfortable and satisfied with our work. You can count on us for unbeatable prices, efficient service and reliable results. Call us today to discover why we are a local leader in our field!

At QSP Plumbing Services, no job is too big or small for our licensed experts. Whether you need water heater repair, water heater installation, drain cleaning, clogged drain repair, or anything in between, we're the trusted local professionals you can count on in Jessup, MD, and its surrounding areas. With decades of experience serving our community, we don't believe in upselling or scamming our customers. You'll receive clear, transparent pricing on the front side without any surprise fees or changes later. We use the latest tools and equipment for faster, longer-lasting repairs. It doesn't matter what it takes; we're committed to keeping our customers happy, so we back up our work with a 100% satisfaction guarantee. Book with us today!