Integrity Duct & HVAC Services

Integrity Duct & HVAC Services operates as a Master HVAC contractor serving Alexandria, Northern Virginia, and Washington DC with a perfect 5-star rating across 81 verified customer reviews. This family-founded company holds Virginia state licensing, maintains full bonding and insurance, and employs NATE-certified technicians who specialize in both residential and light commercial systems. The company handles the full gamut of heating, cooling, and indoor air quality equipment including furnaces, heat pumps, central AC units, rooftop units, and mini-split configurations.

What distinguishes this contractor from regional competitors is the emphasis on engineering-first recommendations rather than sales pressure. Before proposing any equipment upgrade, technicians perform Manual J heat load calculations to properly size systems for each home. The team specializes in older DC rowhouses where tight crawlspaces and historic construction create installation challenges. They install variable-speed systems configured for the region's extreme summer humidity and winter cold snaps, and offer indoor air quality solutions including UV light sanitizers, air purifiers, whole-home humidifiers, and dryer vent cleaning.

Customer reviews consistently mention the same core team: Roberto, Isaac, Kristhiam, Oscar, and Arnardo. For one Washington DC rowhouse, the crew completed a full furnace and AC replacement in a single day, navigating tight historic spaces while protecting floors and walls. Reviewers report receiving detailed cost comparisons with repair versus replacement options, and technicians personally walk homeowners through filter changes and seasonal maintenance. The company offers 24/7 emergency response for sudden heating or cooling failures.