Heating and air conditioning services in Alexandria
Serving homeowners in Alexandria, Virginia for over twenty years with certified HVAC repairs and installations.
Dependable HVAC services in Alexandria VA
Commonwealth Cooling & Heating provides HVAC repairs, system replacements, and scheduled maintenance services in Alexandria, VA. Our NATE-certified technicians reside near Alexandria and respond quickly to heating and cooling needs.
NATE Certified
Certified expertise for complex engineering.
Rapid Dispatch
Strategically located for same-day service calls.
Comfort services we provide
AC Repair
Air conditioning repair and maintenance: We troubleshoot compressor issues, recharge refrigerants, and clean condenser coils to restore cooling.
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Heating
Heating system installation: We install high-efficiency Bryant gas furnaces and heat pumps to keep your home warm during winter.
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IAQ Systems
Duct cleaning and air quality: We clean accumulated dust and pollen from your ductwork to improve indoor air and system airflow.
Read About Air Filters arrow_forward"The technicians from Commonwealth Cooling & Heating did a fantastic job replacing our old air conditioner... Their attention to detail and precision in the installation was exceptional. Highly recommended for anyone in Alexandria."
Mark Henderson
Alexandria VA Homeowner
Alexandria HVAC questions and answers
Since our NATE-certified technicians are based locally, we typically offer same-day or next-day service for all Alexandria residents. In emergencies, we prioritize dispatch to ensure your climate control is restored as fast as possible.
Yes, we specialize in non-invasive climate systems for historic properties. Whether it's high-velocity mini-duct systems or ductless mini-splits, we preserve the architectural integrity of your home while providing modern comfort engineering.
Our detailed maintenance plans include bi-annual inspections, cleaning of condenser and evaporator coils, refrigerant level checks, electrical component testing, and a 15% discount on all future repairs. It's the best way to ensure SEER efficiency and system longevity.
Alexandria Historic Home HVAC Retrofitting
Historic brick and wood-frame homes in Old Town and Del Ray require specialized heating and cooling system design.
Ductwork Challenges in Older Homes
Many historic properties in Alexandria were built before central heating and air conditioning. These homes often rely on plaster walls, plaster ceilings, and balloon-frame construction, making it difficult to install traditional metal duct trunk lines without altering historic structures.
Installing ducts in tight attic spaces or crawl spaces requires careful planning to prevent heat gain. If ducts are uninsulated and pass through a hot attic, the system must work harder, increasing energy bills.
We specialize in retrofitting older homes. We design compact, high-velocity duct systems that use small, flexible tubing pulled through existing wall cavities, preserving plaster finishes and architectural integrity.
High-velocity systems use a specialized air handler that operates at higher static pressures. This allows the system to force air through two-inch ducts quietly, delivering comfortable air without large drywall cutouts.
We insulate all retrofitted ductwork to prevent condensation in hot attics, protecting your plaster ceilings from water damage.
Ductless Mini-Split Heat Pumps
Ductless mini-split heat pumps are an excellent option for older Alexandria homes. These systems use an outdoor unit connected to indoor wall or ceiling units by small copper lines.
Mini-splits do not require ductwork, avoiding invasive wall cuts. They allow you to control temperatures in individual rooms, meaning you only heat or cool the spaces you are using.
We help Alexandria homeowners select systems that meet local historic district guidelines. We mount outdoor units discreetly and choose indoor units that blend with your home's design.
In Old Town Alexandria, the Board of Architectural Review regulates the visibility of outdoor equipment. We install units in rear yards or on flat roofs, hiding the copper line sets under paintable plastic covers that match the historic siding.
Mini-split systems are highly efficient, with ratings exceeding twenty SEER2. This lowers energy usage while preserving the historic character of your property.
City of Alexandria Permit Compliance
The City of Alexandria enforces strict historic district guidelines. We handle all permit filings and present our placement designs to the Board of Architectural Review when necessary.
We verify structural load limits before installing equipment on flat roofs. We also use vibration isolation bases to prevent system hums from traveling through historic wood frames.
Our installations comply with local noise regulations, ensuring that outdoor condenser decibel levels do not disturb your neighbors.
We perform structural evaluations before mounting condensers on roof platforms, checking that the historic joists can support the equipment weight.
Del Ray Wood-Frame Home Temperature Balancing
Wood-frame homes in Del Ray often have uninsulated wall cavities. This lack of insulation causes high heat loss in winter and heat gain in summer.
We recommend zoned heating and cooling systems for these properties. Zoning allows you to adjust airflow between floors, balancing the temperature differences caused by poor insulation.
We also evaluate insulation options, coordinating with local specialists to blow insulation into wall cavities before installing new HVAC equipment.
We adjust the blower speeds on your system, setting a continuous low circulation flow to blend the air between floors and reduce drafts.
Serving Alexandria's Historic and Modern Homes
Pre-1940 homes in Old Town were built without central HVAC in mind. Adding ductwork requires creative approaches because walls lack mechanical chases. Ductless mini-split systems are often the best option, requiring only a small wall penetration for the refrigerant line set.
The Board of Architectural Review has guidelines about exterior modifications. Outdoor condensers must not be visible from the street. Rowhouses share walls, reducing heating loads but creating temperature differences between front and back. Zone dampers or multi-zone mini-splits maintain even temperatures throughout these elongated floor plans.
The Potomac River creates higher humidity along the waterfront. Morning humidity can exceed 85% in summer. We install whole-home dehumidifiers alongside your AC. In Del Ray and Fairlington, mid-century galvanized ducts are often undersized. We test leakage with a duct blaster and seal connections with long-lasting mastic to restore system performance.
