Commonwealth Cooling & Heating
(703) 436-8028 Schedule a Call Schedule
Modern home architecture

Our service offerings

Dependable Heating and Cooling Services, Plus Air Quality Inspections

We keep Northern Virginia homes comfortable in every season with professional HVAC installations, repairs, and maintenance plans.

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Full-service HVAC contractors

Commonwealth Cooling & Heating offers a complete range of residential and light commercial HVAC services in Lorton, Alexandria, and Springfield, VA. Our NATE-certified technicians service all equipment makes and models to restore your indoor comfort.

24/7
Emergency Repair
100%
Satisfaction

COOLING SYSTEMS

Air conditioning repair and installation

Air conditioning unit
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AC Repairs

Fast, accurate diagnosis and repair for all central AC and heat pump brands to restore cooling immediately.

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AC Installation

High-efficiency Bryant cooling systems tailored to your home's layout for maximum comfort and savings.

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AC Maintenance

Detailed seasonal tune-ups to extend equipment life and ensure peak efficiency during peak summer heat.

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Furnace Repair

Expert service for gas and electric furnaces to ensure safe and reliable heating throughout the winter.

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Heating Installation

Modern, high-SEER heating systems professionally sized and installed for decades of dependable warmth.

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Energy Saver Maintenance

Our signature maintenance plan that lowers utility bills, reduces repair risk, and protects your manufacturer warranty.

Heating maintenance

HEATING SYSTEMS

Furnace repair and heating installation

NATE Certified

Our technicians undergo rigorous testing to stay at the forefront of heating technology and safety protocols.

ADDITIONAL EXPERTISE

Air quality and water heater services

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Duct Cleaning

Eliminate dust, allergens, and microbial growth from your ventilation for healthier, breathable air.

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Wrong Filter Exchange

Using the wrong filter can damage your blower motor. We provide custom sizing and high-efficiency filtration systems.

IAQ Certified
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Hot Water Heaters

Expert installation and repair for tankless and traditional hot water systems to ensure you never run cold.

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Engineering Authority

We don't just fix units; we optimize environments. Our approach is based on precise thermal calculations and technical excellence.

System Metric Standard Premium (Bryant)
SEER2 Efficiency Rating 14.3 - 16.0 Up to 26.0
Sound Level (dB) 72 - 76 As low as 51
Warranty Protection 5 Years 10 Years + Labor
Smart Connectivity Optional Standard (Evolution)
Technical Standards

HVAC Engineering and Service Standards

We follow strict engineering standards for all of our services, from routine tune-ups to complex commercial system installations.

Detailed Heating and Cooling Maintenance

Preventative maintenance is the best way to avoid unexpected system failures during extreme summer heat or winter cold. Our detailed tune-ups go beyond a simple visual check.

For air conditioning units, we clean the condenser coils, measure refrigerant charge, check electrical contacts, test capacitors, and inspect the condensate drain line. For furnaces, we inspect the heat exchanger for cracks, test the flame sensor, check gas pressure, and verify safety controls are working properly.

Maintaining your equipment regularly lowers your monthly energy bills, improves capacity, and helps prevent costly repairs. We recommend scheduling AC service in the spring and furnace service in the autumn.

During each maintenance visit, we also inspect the ductwork for visible leaks or damage. Leaky ducts can lose up to thirty percent of conditioned air to unconditioned spaces like attics and crawl spaces.

We provide a detailed checklist report after every service visit. This report details all measurements, including compressor electrical draw, capacitor strength, and air temperature drops across the coils.

Duct Sizing and Airflow Diagnostics

An HVAC system is only as good as the ductwork that distributes the air. Incorrectly sized ducts restrict airflow, causing uneven temperatures and system noise. Restricted airflow also increases static pressure, which forces the blower motor to use more energy and can cause it to fail prematurely.

We test static pressure across the system to identify airflow restrictions. If we find issues, we can adjust the duct layout, add return air grilles, or resize duct segments to restore balanced airflow.

We also assist homeowners with indoor air quality. We install air purifiers, whole-home humidifiers, and high-efficiency media filters to remove contaminants from the air you breathe.

Proper airflow balance is critical for system health. When air cannot flow freely across the cooling coil, the temperature of the coil drops below freezing. This causes moisture in the air to freeze on the fins, blocking airflow completely and damaging the compressor.

We use electronic flow hoods to measure CFM (cubic feet per minute) at individual supply registers, ensuring that each room receives the correct amount of conditioned air for balanced comfort.

Bryant Evolution Control Setup

Modern systems feature digital control boards that communicate directly with the thermostat. We configure these controls to optimize system runtime and dehumidification settings.

We program custom schedules that match your family's daily routine. This reduces energy usage when the home is unoccupied while ensuring comfort when you return.

We also integrate zoning dampers that partition your duct system. This allows independent temperature control on different levels of your home, reducing energy waste on unoccupied floors.

The Evolution control board records historical fault codes, allowing us to review past system events during service visits. This diagnostic data helps us identify intermittent issues.

Emergency Response Mechanics

When a heating or cooling system fails during extreme weather, fast service is necessary. Our dispatcher coordinates our service trucks using GPS mapping.

This routing ensures that the closest technician is sent to your home, minimizing wait times. We carry common replacement parts on our vehicles, allowing us to resolve most issues on our initial visit.

We prioritize calls from homes with vulnerable residents, including infants and the elderly, ensuring safety during extreme temperature events.

Our technicians are on call twenty-four hours a day, providing emergency service when your heating or cooling system fails during freezing weather.

Commercial HVAC Capabilities

We service commercial properties in our region, including retail spaces, offices, and light industrial facilities. Commercial equipment requires specialized engineering.

We inspect rooftop package units, exhaust fans, and commercial duct networks. We balance commercial air delivery systems to meet local occupancy codes.

We also offer customized maintenance agreements for commercial accounts, focusing on filter replacements and belt checks to prevent business downtime.

Refrigerant Leak Auditing

Refrigerant leaks lower system efficiency and damage the environment. We perform electronic leak audits using advanced halogen detectors.

If we find a leak, we recover the refrigerant, repair the copper line, and perform a dry nitrogen pressure test to verify the seal.

Once the seal is verified, we evacuate the system to under five hundred microns using a vacuum pump, ensuring all moisture is removed before recharging.

Professional HVAC maintenance tools and equipment
Planned Maintenance

Prevent Failures Before They Happen

Our annual maintenance agreement includes two visits per year: a spring cooling tune-up and a fall heating inspection. Each visit follows a detailed checklist designed to catch developing problems early and keep your system running at peak efficiency.

During the cooling tune-up, we measure refrigerant charge using superheat and subcooling calculations, test compressor amp draw against manufacturer specs, clean the condenser coil, inspect the condensate drain line, and verify thermostat calibration. These measurements tell us whether the system is operating at its rated efficiency.

Agreement members receive priority scheduling during peak seasons and a 15% discount on repair parts. When temperatures drop below freezing and our phone lines are busy, agreement customers move to the front of the service queue.

Decision Guide

When to Repair vs. When to Replace

Most air conditioners and heat pumps last 12 to 15 years. Gas furnaces last 15 to 20 years with proper maintenance. When your system is in the last quarter of its expected life and facing a major repair, replacement often makes more financial sense.

Our guideline: if the repair cost exceeds 50% of the price of a new system, replacement is usually the better investment. A new system comes with a full manufacturer warranty, uses current refrigerant, and operates at much higher efficiency levels. Systems running R-22 face rising recharge costs since production ended in 2020.

We prepare a written comparison showing repair cost versus monthly financing for a new system. Many homeowners find that energy savings from a new high-efficiency system offset a large portion of the financing payment. Federal tax credits under the Inflation Reduction Act can save up to $2,000 on qualifying heat pump installations.

Modern home with new energy-efficient HVAC system