Our experienced team offers services for both residential and commercial properties.With over 30 years of experience in the industry, we boast all of the knowledge and expertise in repairing.
Professional duct circuit design and custom fabrication for residential and commercial properties in San Antonio. LG Mechanical maximizes HVAC efficiency and airflow with expertly engineered ductwork distribution systems. Properly designed and installed ductwork is critical to your heating and cooling performance—even the most efficient HVAC system underperforms with poorly designed ducts. Our Master HVAC Contractor brings 30+ years of ductwork expertise to every San Antonio project, from complete home duct replacements to complex commercial ventilation systems.
Poor ductwork design costs San Antonio property owners thousands in wasted energy and uncomfortable indoor temperatures. Undersized ducts restrict airflow, oversized ducts reduce efficiency, and leaky connections lose up to 30% of conditioned air before it reaches your living or work spaces. LG Mechanical’s custom ductwork solutions include complete system design with Manual D load calculations, on-site metal fabrication for precise fit, proper sizing and balancing, and sealed connections that maximize your HVAC system’s performance. We design and install residential duct systems, commercial HVAC ductwork, kitchen hood exhaust systems, and industrial ventilation—all built to San Antonio building codes and ACCA industry standards.
Our veteran-owned company combines engineering precision with hands-on fabrication expertise. We don’t just install pre-made duct sections—we custom-fabricate ductwork on-site to fit your property’s unique layout, ensuring optimal airflow, minimal noise, and maximum energy efficiency. Whether you’re adding a room addition that needs ductwork, replacing old deteriorating ducts, or building a new commercial facility requiring complete HVAC distribution design, LG Mechanical delivers professional ductwork solutions engineered for San Antonio’s climate and your specific comfort needs.
Improve your existing HVAC performance with professional ductwork inspection and air balancing from LG Mechanical. We identify duct leaks, airflow restrictions, improper sizing, and insulation deficiencies that waste energy and create hot or cold spots in your San Antonio property. Our comprehensive ductwork evaluation includes airflow measurement, pressure testing, visual inspection, and thermal imaging to diagnose hidden problems reducing your HVAC efficiency.
Duct Leak Detection & Professional Sealing Services
Airflow Measurement & Room-by-Room Balancing
Insulation Inspection & Energy Efficiency Upgrades
LG Mechanical’s Master HVAC Contractor certification and custom metal fabrication capabilities ensure professional ductwork design and installation on every San Antonio project. Our veteran-owned commitment to precision engineering and 30+ years of ductwork experience deliver properly sized, sealed, and balanced duct systems that maximize your HVAC investment and indoor comfort.
We guarantee our custom ductwork installations meet ACCA Manual D standards and San Antonio building codes. Every duct system we design and fabricate receives proper load calculations, quality materials, professional installation, and thorough testing to ensure optimal airflow, energy efficiency, and long-term performance for your residential or commercial property.
LG Mechanical’s Master HVAC Contractor license represents the highest level of ductwork design and installation expertise in San Antonio. Owner Geno Anguiano brings 30+ years of specialized experience in residential and commercial duct system engineering. Proper ductwork design requires advanced knowledge of airflow dynamics, pressure calculations, Manual D load analysis, and building science—expertise that separates master contractors from general HVAC installers. Our veteran-owned company applies engineering precision to every ductwork project, ensuring your San Antonio property receives professionally designed duct circuits that deliver consistent temperatures, quiet operation, and maximum energy efficiency throughout every room and zone.
LG Mechanical fabricates custom ductwork on-site for precise fit and optimal HVAC performance. Unlike contractors who only install pre-made duct sections, we bring metal fabrication equipment directly to your San Antonio property to create custom transitions, fittings, and duct runs that fit your building’s exact layout. This on-site fabrication capability is essential for room additions, commercial kitchen exhaust systems, complex commercial HVAC installations, and properties with unique architectural features. Our custom metalwork ensures proper connections, minimizes turbulent airflow, reduces noise transmission, and creates sealed duct systems without the gaps and compromises common with off-the-shelf ductwork components. We fabricate residential ductwork, commercial HVAC distribution, industrial ventilation systems, and specialized kitchen hood exhaust—all built to exacting specifications.
Proper ductwork design starts with Manual D load calculations—the industry standard for sizing duct systems correctly. LG Mechanical performs comprehensive airflow calculations for every custom ductwork installation, ensuring each supply register and return grille receives the precise CFM (cubic feet per minute) needed for balanced comfort. Our engineered duct designs account for San Antonio’s climate, your building’s layout, insulation values, window sizes, and HVAC equipment capacity. We calculate duct sizes, design supply and return paths, plan proper grille placement, and engineer optimal airflow distribution. This engineering approach prevents common ductwork problems like noisy registers, hot and cold spots, excessive energy consumption, and HVAC equipment strain. Whether designing ductwork for new construction, room additions, or complete duct replacements, our calculated approach delivers measurably better performance than guesswork installations.
San Antonio restaurants and commercial kitchens trust LG Mechanical for expert kitchen hood exhaust ductwork design and fabrication. Commercial kitchen ventilation requires specialized knowledge of grease exhaust systems, fire safety codes, health department regulations, and high-temperature ductwork materials. We custom-fabricate Type I grease hood ductwork with proper slope for grease drainage, welded seams for fire safety, and NFPA 96 code-compliant installation. Our commercial kitchen ductwork expertise includes exhaust fan sizing, make-up air duct design, proper clearances from combustibles, access panel installation for cleaning, and complete documentation for health inspections. We understand that commercial kitchen ventilation directly impacts food safety, employee comfort, and operating permits—our professional duct fabrication ensures your San Antonio restaurant passes inspections and maintains safe, efficient kitchen operations.
Stop wasting energy through leaky, uninsulated ductwork. LG Mechanical provides professional duct sealing and insulation services that dramatically improve HVAC efficiency in San Antonio homes and businesses. Studies show that typical duct systems lose 20-30% of conditioned air through leaks, gaps, and poor connections—that’s money spent cooling or heating your attic and wall cavities instead of your living spaces. Our duct sealing services include mastic sealant application at all connections, Aeroseal technology for hard-to-reach leaks, proper insulation upgrades, and pressure testing to verify improvements. We also redesign and replace ductwork in unconditioned spaces like attics and crawlspaces where San Antonio’s extreme heat causes massive efficiency losses. Properly sealed and insulated ductwork reduces energy bills, improves indoor comfort, decreases HVAC runtime, and extends equipment lifespan—providing measurable ROI for residential and commercial property owners.
