San Antonio Mechanical Engineers

Cleary Zimmermann Engineers is a San Antonio-based MEP engineering firm with more than 20 years of experience designing mechanical systems for projects across the Alamo City and South Central Texas. Our mechanical engineers specialize in HVAC design, plumbing engineering, and full mechanical system coordination for a wide range of building types — from K-12 schools and hospitals to municipal facilities and commercial office space. As a firm headquartered in San Antonio, we bring genuine local knowledge to every project we take on.

San Antonio’s climate puts real demands on building systems. The combination of intense summer heat, high cooling loads, and occasional winter freezes means mechanical systems need to be sized, specified, and coordinated with precision from the start. Our engineers understand the local energy codes, the building types common to the San Antonio market, and the contractors and project teams that operate here. That familiarity makes a difference — in design quality, in coordination efficiency, and in how smoothly projects move through construction.

Our mechanical engineering team provides comprehensive design services for projects throughout San Antonio and the surrounding region. We work across all project phases — from early concept and schematic design through construction documents and construction administration.

• HVAC System Design: Heating, ventilation, and air conditioning design for new construction and renovation projects, including system type selection, equipment specification, load calculations, and ductwork layout.
• Plumbing Engineering: Domestic water supply and distribution, sanitary and storm drainage, fixture scheduling, and specialty systems including medical gas for healthcare facilities.
• Energy Modeling & Code Compliance: Mechanical system design aligned with Texas energy code requirements, including ASHRAE compliance and building performance documentation.
• Controls Coordination: Integration of mechanical systems with building automation and controls — ensuring HVAC systems operate as intended after construction.
• Commissioning: Independent verification that mechanical and related building systems are performing according to the design intent and the owner’s project requirements.
• Construction Administration: Submittal review, RFI responses, and site observation support to ensure mechanical design intent carries through to the finished building.