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about us Ralph P. Sita, Inc. is a locally owned and operated, full service, residential, industrial, and commercial heating, ventilation, and air conditioning contractor with over 42 years of experience in the industry. Located in Dunkirk, Maryland, we serve the District of Columbia, Virginia areas, as well as local Maryland Counties, including but not limited to: Calvert, Charles, St. Mary's, Anne Arundel, Prince George's, Howard, Montgomery, and Queen Anne's. Ralph P. Sita, Inc. is a union contractor with personnel trained and supplied by the Steamfitters Local Union #602. Our mechanics have years of experience and are equipped with the most up to date training and tools of the trade. We design, install, and service pneumatic controls, mechanical equipment, heating, air conditioning and ventilation systems, and offer full service, commercial and residential, preventative maintenance service contracts. Ralph P. Sita, Inc. is fully licensed and insured in Maryland, Virginia, and the District of Columbia. Ralph P. Sita, Inc. is also an accredited business with the Better Business Bureau (BBB). Frequently asked questions How often should my HVAC be serviced? Have your system inspected by a professional HVAC contractor in the spring and fall to coincide with the cooling and heating seasons. This will ensure everything from the blower (the internal motor) to the thermostat is running smoothly and your house will stay warm and cool when you want it to. How often should HVAC filters be replaced? Change your filter every three months (each season) for 1-inch filters, or more frequently if you have pets, smoke or allergens in the house, all of which make filters work harder. Each house or unit has a different filter size (some have more than one filter), so check the filter size(s) before you purchase. Energy Star reports that changing the filter is a top DIY action item for a properly functioning HVAC system, as “a dirty filter can increase energy costs and damage your equipment, leading to early failure.”** And just think, each time you replace the filter you are helping to improve the air quality in the house. Why should I perform preventive maintenance? Heating and cooling systems work incredibly hard to perform their functions for your household. The constant stopping, starting and continual operation can wear down a machine quickly and unexpectedly if the proper care and maintenance is delayed. However, by performing preventive maintenance, or servicing your system regularly, you can maximize the life-cycle of your heating or cooling unit and guard against many unexpected failures. Preventive maintenance inspections performed on a regular basis can uncover leaks, rust, rot, soot, frayed wires and corroded electrical contacts. What equipment requires preventive maintenance? At least once a year, we suggest that homeowners schedule a professional tune-up for the central heating and cooling system in their home. Inspections on boiler and furnace systems should include duct work, pipes, dampers, valves, the chimney, registers, radiators, pumps, blowers, fuel lines, the gas meter, oil tank and every part of the actual furnace and boiler. Meanwhile, heat pump and air conditioning unit inspections should also include inspections of the fan, compressor, indoor coils, outdoor coils and refrigerant lines. Which HVAC system is right for me? Schedule an appointment with us. We’ll come to your home and evaluate its size, heating and cooling needs, environment, and the work we’ll need to do. Then, we can recommend the best system for you and install it quickly.

Our Work 20161112_104410 20161112_104221_resized 20160922_071357 20161112_104410 1/9 District of Columbia Water & Sewer Authority A dvanced Wastewater Treatment Plant (Blue Plains) 5000 Overlook Ave., SW Washington, DC 20032 Contact(s): Paul Sbardella/John O'Reilly P: (202) 787-2000 F: (202) 787-2333 www.dcwater.com WAWA #591 - Prince Frederick, MD Remodel of Wawa Convenience Store in Prince Frederick, MD. 1/5 1/5 La Plata Plaza - La Plata, MD Replacement of "Trane" 10 Ton Packaged "GasPak" Rooftop Unit. Collington Plaza - Bowie, MD Replacement of one (1) "York" 7.5 ton packaged gas heating/electric cooling rooftop unit. 1/6 1/3 Mike's Auto Body - Owings, MD Installation of two (2) new duct work systems for new 4 ton and 5 ton "American Standard" heat pump split systems. ATI Physical Therapy - Bowie, MD The installation of one (1) "York" 7.5 ton packaged gas heating/electric cooling rooftop unit complete with new ductwork system for tenant build out. 1/4 1/2 Tanger Outlets - National Harbor, MD The installation of one (1) "York" 7.5 ton packaged gas heating/electric cooling rooftop unit for retail store.

Washington DC HVAC Services in Washington DC Homeowners and business owners in Washington, D.C., seeking a dependable and experienced HVAC contractor turn to the expert team at Ralph P. Sita Inc., based in Dunkirk, Maryland. We offer comprehensive heating and cooling services for residential and commercial clients across Washington, D.C., Arlington, VA, Calvert County, Montgomery County, Howard County, Prince George's County, Frederick, Maryland. HVAC Maintenance To maximize the lifespan and efficiency of your HVAC equipment, regular maintenance is essential. While homeowners and business owners can handle simple tasks like replacing air filters, more critical maintenance requires a professional touch. Our team provides furnace tune-ups each fall and AC tune-ups every spring. This plan includes annual maintenance for all your HVAC systems and gives you priority service for urgent repairs, ensuring minimal downtime. HVAC Repair & Replacement Despite regular maintenance, HVAC repairs are sometimes unavoidable. If your furnace, boiler, air conditioner, or any part of your HVAC system is malfunctioning or making unusual noises, contact our team. With 40 years of experience, our HVAC company is adept at repairing a wide variety of HVAC systems. In Washington, D.C., this expertise is particularly valuable due to the presence of older buildings with outdated HVAC systems that many contractors may not know how to fix. Our careful approach ensures that repairs do not harm these often historic structures. When it’s time to replace your HVAC system, whether it’s an older model or a system nearing 20 years of age, our team will help you choose the best replacement based on your building’s size and your specific needs. Excellent 5.0 Stars A totally professional operation! We were very impressed by the care the installing team took in caring for our carpet, ensuring that we understood what was being done, providing needed advice, and following up on the installation. They were on time, efficient, and a pleasure to deal with. Could not recommend the Sita family's operation more highly! - Glenn Whaley HVAC System Installation Whether you’re building a new home, renovating an old one, or redeveloping an entire block in Washington, D.C., our team is here for your HVAC system installation needs. Selecting the appropriate size and type of HVAC equipment for your specific space and usage requirements is a specialized task best left to professionals. With our extensive experience and expertise, we ensure you make the right choice for your project. Complete HVAC Services in Washington, D.C. In addition to heating and cooling services, we offer a range of other HVAC solutions, including the installation of air purifiers, UV lights, humidifiers, dehumidifiers, and programmable and smart thermostats. These enhancements contribute to a safer and more comfortable environment at your home or workplace. If you need a reliable HVAC contractor in Washington, D.C., contact the trusted team at Ralph P. Sita Inc. We are the area’s premier choice for HVAC maintenance, repair, replacement, and installation.

Ralph P. Sita, Inc. has been a trusted provider of expert commercial HVAC services in the DC, Maryland, and Virginia area for over 42 years. Our comprehensive offerings include AC and heat pump installation, packaged rooftop units, repair, maintenance, and more. Commercial HVAC Services in Calvert County, MD Ralph P. Sita, Inc. is a locally owned and operated, full-service commercial HVAC contractor with over 42 years of experience in the industry. Our expert technicians specialize in commercial AC installation & replacement, heat pump installation & replacement, HVAC maintenance & repair, furnaces (Electric/Gas/Oil), boilers (Steam, Gas, & Oil), indoor air quality solutions, ductwork design & installation, unit heaters, air handler units, fan coil units, packaged rooftop units, cooling towers, and system piping,. Contact us today for a free estimate. Contact Us District of Columbia Water & Sewer Authority Advanced Wastewater Treatment Plant (Blue Plains) Our Commercial HVAC Services AC Installation & Replacement Heat Pump Installation & Replacement HVAC Maintenance & Repairs Furnace Services (Electric, Gas, Oil) Boiler Services (Steam, Gas, Oil) Indoor Air Quality Solutions Ductwork Design & Installation Unit Heaters Air Handler Units Fan Coil Units Packaged Rooftop Units Cooling Towers System Piping Why Ralph P. Sita Inc. for your Commercial HVAC Needs? As a leading commercial HVAC contractor serving the DC, Maryland, and Virginia (DMV) area, Ralph P. Sita, Inc. offers a comprehensive range of services to keep your business comfortable and running efficiently. From new installations and replacements to maintenance, repairs, and upgrades, our skilled technicians have the expertise to handle all your commercial HVAC needs. We've successfully completed projects for a wide range of clients across the DMV area, such as the District of Columbia Water & Sewer Authority Advanced Wastewater Treatment Plant (Blue Plains), WAWA #591 in Prince Frederick, MD, La Plata Plaza in La Plata, MD, Collington Plaza in Bowie, MD, Mike's Auto Body in Owings, MD, ATI Physical Therapy in Bowie, MD, and Tanger Outlets in National Harbor, MD. Our projects showcase our versatility and expertise, from remodeling the HVAC system for a convenience store to replacing packaged rooftop units, installing new ductwork systems for heat pump split systems, and providing complete HVAC solutions for tenant build-outs and retail stores. When you choose Ralph P. Sita, Inc. for your commercial HVAC needs, you can trust that you're working with a team of experienced professionals dedicated to delivering top-quality workmanship, exceptional customer service, and energy-efficient solutions tailored to your specific requirements. Looking for a Commercial HVAC Contractor in your Area? We offer Commercial Air Conditioning, Ventilation and Heating Services to the Following Areas: Calvert County, MD Anne Arundel County, MD Prince George's County, MD Charles County, MD St Mary's County, MD Queen Anne's County Howard County, MD Montgomery County, MD Washington, D.C. Arlington, VA Alexandria, VA Fairfax, VA Contact Us About Us As a union contractor with personnel trained and supplied by the Steamfitters Local Union #602, our mechanics have years of experience and are equipped with the most up-to-date training and tools of the trade. We design, install, and service pneumatic controls, mechanical equipment, heating, air conditioning, and ventilation systems, and offer full-service, commercial and residential, preventative maintenance service contracts. Ralph P. Sita, Inc. is fully licensed and insured in Maryland, Virginia, and the District of Columbia, and is an accredited business with the Better Business Bureau (BBB). We work to service, install and maintain all makes of equipment Commercial HVAC Brands we WorK With How often should my HVAC be serviced? Have your system inspected by a professional HVAC contractor in the spring and fall to coincide with the cooling and heating seasons. This will ensure everything from the blower (the internal motor) to the thermostat is running smoothly and your house will stay warm and cool when you want it to. How often should HVAC filters be replaced? Change your filter every three months (each season) for 1-inch filters, or more frequently if you have pets, smoke or allergens in the house, all of which make filters work harder. Each house or unit has a different filter size (some have more than one filter), so check the filter size(s) before you purchase. Energy Star reports that changing the filter is a top DIY action item for a properly functioning HVAC system, as “a dirty filter can increase energy costs and damage your equipment, leading to early failure.”** And just think, each time you replace the filter you are helping to improve the air quality in the house. Why should I perform preventive maintenance? Heating and cooling systems work incredibly hard to perform their functions for your household. The constant stopping, starting and continual operation can wear down a machine quickly and unexpectedly if the proper care and maintenance is delayed. However, by performing preventive maintenance, or servicing your system regularly, you can maximize the life-cycle of your heating or cooling unit and guard against many unexpected failures. Preventive maintenance inspections performed on a regular basis can uncover leaks, rust, rot, soot, frayed wires and corroded electrical contacts. What equipment requires preventive maintenance? At least once a year, we suggest that homeowners schedule a professional tune-up for the central heating and cooling system in their home. Inspections on boiler and furnace systems should include duct work, pipes, dampers, valves, the chimney, registers, radiators, pumps, blowers, fuel lines, the gas meter, oil tank and every part of the actual furnace and boiler. Meanwhile, heat pump and air conditioning unit inspections should also include inspections of the fan, compressor, indoor coils, outdoor coils and refrigerant lines. Which HVAC system is right for me? Schedule an appointment with us. We’ll come to your home and evaluate its size, heating and cooling needs, environment, and the work we’ll need to do. Then, we can recommend the best system for you and install it quickly. Contact Us Today a free estimate* or Ask Us a question Ralph P. Sita, Inc. is a local family-owned and operated, full-service commercial HVAC contractor with over 42 years of experience in the industry. We look forward supporting the needs of your home. Contact us with your information and we'll be in touch. Contact Us *Free estimates are for new installations/changeouts only

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our services Heating & Air Conditioning Ralph P. Sita, Inc. is a 24-hour, full-service HVAC company. We service, install, and maintain Heat Pump Systems, A/C units, Furnaces (Electric/Gas/Oil), Boilers (Steam, Gas, & Oil), Unit Heaters, Air Handler Units, Fan Coil Units, Packaged Rooftop Units, Cooling Towers, System Piping, etc. We service, install, and maintain all makes of equipment including Bosch, Carrier, Bryant, York, Trane, American Standard, Liebert, McQuay, Daikin, Frigidaire, Gibson, Goodman, Rheem, Ruud, etc. Temperature Control & Pneumatic Control Systems Building Automation, Commercial Controls, Johnson Controls, Honeywell Controls, Robertshaw electric, Valve Actuators, Dampers, DDC Systems, BACnet, VAV systems. We design, install, and service pneumatic control systems. Commerical & Residential Maintenance Agreements We offer commercial and residential maintenance contracts to keep your equipment operating at peak performance. Maintenance can be performed on a monthly, quarterly, semi-annual, or annual basis depending on your specific needs. Custom Ductwork Systems We Design, Fabricate, and Install Custom Duct Work Systems for Commercial and Residential use. We also clean and repair and/or alter existing duct work systems and install supply and return ductwork for central HVAC systems and exhaust fans. Boiler Maintenance & Replacements We offer customized boiler preventative maintenance as a way to avoid costly outages and expensive equipment repairs. A yearly maintenance program ensures optimum boiler efficiency and savings. We service, repair, and replace all types of steam heating and hot water boiler heating systems. Indoor Air Quality Creating your ideal home environment is more than just controlling the temperature. It's also managing humidity and ventilation, which can dramatically impact your comfort and create a space for whoever you share it with. Your home’s air should be filtered and cleaned with limited volatile organic compounds (VOCs) and pollutants that can affect allergies. We provide a variety of indoor air quality solutions to fit your needs and keep everyone breathing healthy air.

Ralph P. Sita, Inc. has been a trusted provider of residential HVAC services in the DC, Maryland, and Virginia area for over 42 years. We offer AC and heat pump installation, furnance and boiler services, as well as maintence and replacement servics. Residential HVAC Services in Calvert County, MD Ralph P. Sita, Inc. is a locally owned and operated, full-service residential HVAC contractor with over 42 years of experience in the industry. Our expert technicians specialize in residential AC installation & replacement, heat pump installation & replacement, HVAC maintenance & repair, furnaces (Electric/Gas/Oil), boilers (Steam, Gas, & Oil), indoor air quality solutions, and ductwork design & installation. Contact us today for a free estimate. Contact Us Our Residential HVAC Services AC Installation & Replacement Jump to Section Heat Pump Installation & Replacement Jump to Section HVAC Maintenance & Repairs Jump to Section Furnace Services (Electric, Gas, Oil) Jump to Section Boiler Services (Steam, Gas, Oil) Jump to Section Indoor Air Quality Solutions Jump to Section Ductwork Design & Installation Jump to Section Looking for Service in your Area? We offer Residential Air Conditioning, Ventilation and Heating Services to the Following Areas: Calvert County, MD Anne Arundel County, MD Prince George's County, MD Charles County, MD St Mary's County, MD Queen Anne's County, MD Howard County, MD Montgomery County, MD Washington, D.C. Arlington, VA Alexandria, VA Fairfax, VA Contact Us About Us As a union contractor with personnel trained and supplied by the Steamfitters Local Union #602, our mechanics have years of experience and are equipped with the most up-to-date training and tools of the trade. We design, install, and service pneumatic controls, mechanical equipment, heating, air conditioning, and ventilation systems, and offer full-service, commercial and residential, preventative maintenance service contracts. Ralph P. Sita, Inc. is fully licensed and insured in Maryland, Virginia, and the District of Columbia, and is an accredited business with the Better Business Bureau (BBB). AC Installation and Replacement residential AC Installation & Replacement When it comes to AC installation, repair, and replacement, the first step is to assess your home's cooling needs and determine the best type of AC system for your space. The most common options include central air conditioners, which distribute cool air through ductwork; ductless mini-split systems, which are ideal for homes without ductwork or for zoned cooling; heat pumps, which provide both cooling and heating; window units, which are self-contained and installed in a window or wall; and portable units, which can be moved from room to room. Whether you need a new installation, repair, or replacement, the process involves assessing the issue, providing upfront quotes, and ensuring the work is done safely and efficiently. For installations, we properly size the unit, prepare the area, and connect the components according to local codes and manufacturer guidelines. For repairs, we use diagnostic tools to pinpoint the problem and explain your options. If a replacement is necessary, we'll help you find an energy-efficient unit that fits your needs and budget. Our goal is always to keep you comfortable and ensure your AC is running optimally. Heat Pump Installation and Replacement residential Heat pump Installation & Replacement Heat pumps are a versatile and energy-efficient choice for heating and cooling homes in the DC, Maryland, and Virginia (DMV) area. They work by transferring heat from one place to another, providing cooling in the summer and heating in the winter. When installing a heat pump, we determine the appropriate size and type for your home, safely remove your old HVAC system if necessary, and follow all local codes and manufacturer guidelines for a reliable installation. Heat pumps are well-suited for the DMV's moderate climate and can offer energy savings compared to traditional HVAC systems, especially when paired with a variable-speed compressor. If your heat pump needs repair, common issues include insufficient heating or cooling, strange noises, or ice buildup on the outdoor unit. Our technicians use diagnostic tools to identify the problem and provide upfront quotes for repairs. Regular maintenance, such as annual tune-ups, is crucial for preventing issues and extending the life of your heat pump. While heat pumps may have a higher upfront cost than central AC systems, their energy efficiency and ability to provide both heating and cooling can lead to long-term savings. HVAC Maintenance and Repair residential HVAC Maintenance & Repair Regular HVAC maintenance and timely repairs are crucial for keeping your heating and cooling system running smoothly and efficiently in the DC, Maryland, and Virginia (DMV) area. Common issues that can affect air conditioners and heat pumps include refrigerant leaks, frozen evaporator coils, compressor failures, and clogged condensate drains. Furnaces and boilers may experience problems with pilot lights or ignition, heat exchanger cracks, thermostat malfunctions, and dirty burners. To prevent these issues, scheduling annual maintenance tune-ups is essential. During these visits, our technicians thoroughly clean and inspect your system, check for potential problems, and ensure proper operation. If you do experience issues, it's important to call for professional repairs promptly. Furnace Services residential Furnace Services (Electric, gas, Oil) We install and service the three main types of furnaces: electric, gas, and oil. Electric furnaces use heating elements to warm the air and are typically less expensive to install but may have higher operating costs. Gas furnaces, the most common type in the DMV area, burn natural gas or propane to heat the air and are generally more energy-efficient and cost-effective. Oil furnaces are less common but still used in some older homes; they burn oil to generate heat and require an on-site storage tank for fuel. They typically require more frequent maintenance than gas or electric models. We recommend scheduling an annual furnace maintenance before the start of winter. During these visits, we'll thoroughly inspect your system, clean key components like burners and heat exchangers, test safety controls, and make any necessary adjustments to optimize performance. If you experience issues with your furnace, such as uneven heating, strange noises, or poor air quality, it's important to call for professional repairs as soon as possible to prevent further damage and ensure your family's safety. Boiler Services residential Boiler Services (Steam, gas, Oil) Boiler systems are a reliable and efficient heating option for homes in the DC, Maryland, and Virginia (DMV) area. The two main types of residential boilers are hot water boilers and steam boilers. Hot water boilers heat water and circulate it through pipes to radiators, baseboard heaters, or radiant floor systems, providing consistent, even heating. They are more energy-efficient and responsive to thermostat changes compared to steam boilers. Steam boilers heat water until it turns into steam, which then travels through pipes to cast-iron radiators, where it cools and condenses back into water, releasing heat. Steam boilers are typically found in older homes and can be less energy-efficient and require more maintenance. Both boiler types can be fueled by natural gas, propane, or oil, with gas being the most common in the DMV area. We recommend scheduling annual maintenance to inspect your boiler, test safety controls, clean key components, and flush the system to remove any accumulated sediment or scale. If you experience any issues with your boiler, such as uneven heating, strange noises, or leaks, call us and we can help diagnose the issue, prevent further damage and keep your home warm and comfortable. Indoor Air Quality Solutions residential Indoor Air Quality Solutions The DC, Maryland, and Virginia (DMV) area, is known for its issues with high humidity levels, dust, pollen, and mold growth. Implementing proper indoor air quality solutions improves the air you breathe inside you home and can promote a healthier, more comfortable living environment. We can help improve your indoor air quality through: - Air Filtration Systems: - Air Purifiers - Humidifiers and Dehumidifiers - Ventilation Systems - Duct Cleaning Ductwork Design and Installation residential Ductwork Design & Installation We specialize in creating custom ductwork solutions tailored to your home's unique needs and layout. When designing ductwork for a home we take into account: Load calculations: An analysis of your home's heating and cooling needs based on factors like square footage, insulation, window placement, and occupancy. This information helps determine the appropriate size and capacity of your HVAC equipment and ductwork. Ductwork sizing: Using industry-standard tools like Manual D, we'll calculate the proper size and configuration of your ducts to ensure optimal airflow and pressure balance. Duct layout: We'll design a duct system that efficiently distributes air to each room in your home, taking into account factors like the location of supply and return vents, the length and routing of ducts, and the need for zoning or dampers to control airflow. Material selection: We'll recommend the best material for you home; common options include sheet metal, fiberglass duct board, and flexible ducts. Once the design is finalized, we oversee the professional installation, including: Fabrication Installation Insulation Testing and balancing Contact Us Today a free estimate* or Ask Us a question Ralph P. Sita, Inc. is a local family-owned and operated, full-service residential HVAC contractor with over 42 years of experience in the industry. We look forward supporting the needs of your home. Contact us with your information and we'll be in touch. Contact Us *Free estimates are for new installations/changeouts only

HVAC Company - Ralph P. Sita, Inc. offers Residential & Commercial Heating, Ventilation, & Air Conditioning Services. Family owned and operated for over 42 years! Ralph p. sita, inc. Residential & Commercial Heating, Ventilation, & Air Conditioning In CalverT County, MD Services Family owned and operated for over 42 years! HEATING VENTILATION AIR CONDITIONING We've got over 41 years of experience to help you determine how to tackle all of your heating concerns. Our expert technicians can help you determine the system that will best fit your particular needs. In addition, because we offer a wide range of exceptional brand named equipment, we are able to offer several, reliable and affordable, heating options. We've got several options to help with all of your commercial and residential air ventilation needs. We specialize in custom duct work systems and also offer air duct cleaning to ensure your system is operating as efficient and effective as possible We've got a number of different options to help you with all of your cooling needs. From preventative maintenance services, to repairs and new installations, we've got you covered. Summer is right around the corner! Call to schedule your preventative maintenance service today! get a free quote today! Call Us Today: (301) 855-9387 or Click the Link Below and We'll Get Back to You with a Quote Contact Us Testimonials Contact “Excellent service as always, Ricky and Eddie are true professionals and highly knowledgable and easy to work with. In a time of dwindling services and customer service, they are such a breath of fresh air! Thank you for all you do for your clients and the high quality service you provide.” Valerie Itteilag, Washington, DC