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About DesignAir Of Texas LLC
DesignAir Of Texas LLC operates from Dallas and serves the broader Texas market as a specialized HVAC design firm. The company holds a 3.7-star rating across three customer reviews, with services centered on ACCA-approved Manual J load calculations, Manual D duct design, and Manual S equipment selection. The firm's founder brings a background as a former community college HVAC instructor, providing both technical depth and educational expertise to residential projects. This combination of practical contractor experience and teaching credentials positions the firm uniquely among Texas HVAC designers, focusing exclusively on system design rather than installation or repair work.
What distinguishes DesignAir Of Texas is its narrow focus on engineering precision rather than general HVAC services. The firm does not perform installations or repairs; instead, they analyze home construction materials to determine proper equipment sizing and duct layout, ensuring code compliance and efficiency. This specialized approach addresses a common industry problem where improperly sized systems lead to discomfort and elevated energy costs. The company emphasizes that since 2018, IECC code requirements mandate ACCA-approved Manual J and S documentation for all HVAC installations, positioning their design services as essential for code compliance rather than optional upgrades.
Customer experiences reveal contrasting service outcomes. One reviewer reported that their design was found to violate building codes upon city inspection in Allen, resulting in required redesign costs and unresolved communication issues with the designer. Conversely, another customer specifically praised the firm as excellent, reliable, knowledgeable, and prompt, recommending their services without reservation. These divergent reviews suggest that project outcomes may depend heavily on specific design requirements and site conditions, with one customer experiencing code compliance challenges while another found the process straightforward and satisfactory.
What Customers Say
One of three reviewers awarded a single star, citing code violations discovered during city inspection in Allen and unresolved redesign costs. The remaining two reviews gave 5 stars, with one specifically describing the firm as excellent, reliable, and knowledgeable. Overall sentiment divides sharply between dissatisfaction over code compliance issues and satisfaction with professional service.
Services
Manual J Load Calculations
Heat gain and loss analysis determining properly sized HVAC equipment for specific home construction and climate conditions.
Manual D Duct Design
Layout and sizing calculations ensuring conditioned air reaches each room at required volumes.
Manual S Equipment Selection
Equipment matching to structure requirements, ensuring efficiency and performance alignment with load calculations.
Residential HVAC Design
Custom system design for homeowner projects, analyzing construction materials and comfort requirements.
Commercial HVAC Design
System design services for contractors, builders, and architects on commercial construction projects.
Code Compliance Documentation
Providing ACCA-approved Manual J and S documentation meeting IECC requirements since 2018.
Traditional and Ductless System Options
Guidance on both conventional ducted systems and modern ductless mini-split configurations.