Safe Healthy Durable Sustainable

About ACC Building Performance LLC

Who?

Hi there! I’m AJ Callegan, born and raised on the bayou of Lafitte, Louisiana, where my love for building took root early on. I’ve been blessed with 20 wonderful years of marriage to my beautiful wife, Becky, and our greatest joy is our daughter, Maelee Jo. With over two decades in the construction industry, I’m passionate about HVAC systems and building science. My mission is to create homes that are not just efficient but truly healthy spaces where families can thrive. When I’m not working, I love enjoying music, good food, and adventures with my family. Let’s build something great together!"

Why?

In 2019, my health took a significant downturn, leading to the unfortunate necessity of selling our HVAC business. Following a diagnosis of epilepsy, I embarked on a challenging medical journey. Eventually, it was revealed that mold toxicity was the root cause of my uncontrollable seizures—a revelation that shed light on the hazards inherent in my career, exposing me to mycotoxins prevalent in HVAC systems and buildings.

Thanks to the intervention of functional medicine, I've been seizure-free for over three years now. Glory to God!! This health ordeal profoundly reshaped my focus and passions. In 2022, I launched a new business centered on building performance, building science, and the house as a system.

Leveraging over two decades of experience and ongoing education, my mission is clear: to address the construction deficiencies that not only led to my illness but contribute to various health issues of others. I aim to drive the necessary changes in building practices, advocating for homes and buildings that are not just safer and more durable but also promote better health and sustainability.

What?

Building Science Principles
HVAC+D
High-Performance Construction
ACCA Manuals J, S, D, and T
Dehumidification & Ventilation
Filtration & IAQ
MOLD Investigations
Blower Door and Duct Tightness Testing
Attic & Crawlspace Encapsulations

Consulting:

Healthy Home Construction
Mold
HVAC

Consulting

Building Science Home Performance Assessment

Uncover the hidden factors affecting your home’s health, comfort, and durability.

Our noninvasive, in-depth assessment provides a clear picture of how your home performs in terms of air leakage, moisture control, heat flow, and HVAC system function. We evaluate the building envelope and mechanical systems to identify issues that impact indoor air quality, occupant health, and long-term performance.

Includes:
• Guided walkthrough to discuss occupant concerns and usage habits
• Thermal imaging and moisture mapping
• Static and zonal pressure diagnostics
• Inspection of HVAC, attic, vents, and drainage where accessible
• Indoor air quality snapshot with AirAdvice monitoring
• 4–6 hours on-site assessment with a comprehensive report

This is not a checklist audit — it’s a science-based diagnostic designed to help you understand how your home truly functions and what to do about it.

Schedule Your Assessment Today

Healthy Home Performance Consulting Package

Expert design and oversight for builders committed to health, durability, and performance.

This all-inclusive consulting package is built for custom home builders who want more than code compliance. From pre-construction planning to final inspection, we guide every step of the process to ensure your home performs as designed—healthy, efficient, and built to last.

What’s Included:
• Design coordination meeting with builder, architect, and homeowner
• Trade coordination meeting with HVAC, plumber, electrician, and framer
• Mid-construction quality control inspection
• Final inspection and performance verification
• Full HVAC system design: ACCA Manuals J, S, D, and T (as needed)
• Whole-home IAQ and moisture strategy: dehumidification, ventilation, filtration, and makeup air
• Two blower door tests (pre-drywall & final)
• Duct leakage testing
• Complete documentation of air barriers, system installation, and mechanical layout
• Ongoing support via phone/email for brief project check-ins

If you're serious about building high-performance homes with verified results, this package gives you the expertise and structure to do it right.

Design Services

ACCA Manual J Load Calculations

Our team performs detailed load calculations according to ACCA Manual J standards to

accurately determine the heating and cooling requirements for each space in your building.

By meticulously assessing factors such as climate, insulation, occupancy, and solar gain, we

ensure your HVAC system is appropriately sized to provide optimal comfort and eﬃciency.

ACCA Manual S Equipment Selection

Building upon the results of the load calculations, we select the right HVAC equipment and

components in accordance with ACCA Manual S guidelines.

Our expertise in equipment selection allows us to choose systems that are perfectly matched to

your building's requirements, maximizing performance and energy efficiency.

ACCA Manual D Ductwork Design

We design ductwork systems that are engineered to deliver conditioned air eﬃciently and

evenly throughout your building, minimizing energy waste and ensuring consistent comfort.

Our ductwork designs adhere to ACCA Manual D standards, guaranteeing that airﬂow is

optimized for each space and that pressure losses are minimized.

Blower Door and Duct Leakage Testing

We design ductwork systems that are engineered to deliver conditioned air eﬃciently and

evenly throughout your building, minimizing energy waste and ensuring consistent comfort.

Our ductwork designs adhere to ACCA Manual D standards, guaranteeing that airﬂow is

optimized for each space and that pressure losses are minimized.

Attic Encapsulation

This attic encapsulation illustrates the consequences of ignorance, incompetence, and unskilled labor, resulting in an unsafe, uncomfortable, moisture-ridden environment. It emphasizes the importance of proper construction practices for maintaining a healthy home. Let it serve as a reminder of the need for knowledge, expertise, and skilled labor in our work to create spaces that prioritize safety, health, and well-being.

Once a neglected and troublesome area, the attic has been reconstructed into a symbol of exceptional quality and attention to detail. Utilizing ACCBP's specialized craftsmanship, longstanding issues such as moisture intrusion and microbial contamination have been expertly addressed, yielding a meticulously well-controlled, well-insulated sanctuary that prioritizes safety, health, comfort, and operational efficiency. This transformation highlights ACCBP's proficiency in remedying intricate environmental challenges within residential spaces.

ACC Building Performance LLC

Safe Healthy Durable Sustainable