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The Precision Diagnostic Advantage
With 16 years of experience mastering the physics of high-performance homes in Southern California, we replace assumptions with scientific field diagnostics. We provide the technical roadmap to turn your home into a durable, healthy sanctuary.
Measurement over assumptions.
Real-time IAQ Analysis: Forensic-grade monitoring for Formaldehyde, VOCs, and Particulates.
Building Diagnostics: High-precision Blower Door and Duct Blaster pressure testing.
Empirical Data: We provide the "ground truth" of your home’s performance.
Aligning Thermal & Vapor Boundaries.
Technical Specifications: Advanced air-sealing and enclosure strategies tailored to your site.
Performance Retrofits: Expert guidance on Dense Pack and Net-and-Blow insulation systems.
Arid-Climate Resilience: Managing moisture and heat-load in Southern California's unique microclimates.
Our Mission: Build Tight and Ventilate Right
Comfort Quest LA is a building science-driven performance firm dedicated to Southern California’s diverse environments. We approach every structure as a complex, integrated system.
The Diagnostic Standard
Measurement, not assumption, is our cornerstone. Our practice is founded on over three decades of industry innovation and 16 years of principal leadership in home performance analysis. We utilize high-precision diagnostic tools to deliver the high-fidelity data that traditional contractors often overlook. This commitment is anchored by a U.S. Patent in evaporative cooling (#5,497,633) and years of collaboration within the Indoor Air Quality (IAQ) and Building Performance Institute (BPI) sectors.
Integrated Performance Roadmaps
Integrated Performance Roadmaps
We do not simply identify problems—we provide the data-driven specifications to solve them. Comfort Quest LA delivers the technical roadmap required to create efficient, durable, and healthy homes:
Performance Specifications: We provide the benchmarks for high-performance HVAC and ventilation. We prioritize controlled strategies using ERV/HRV technology with HEPA and UV filtration to ensure a constant stream of fresh air managed by CO2 and VOC monitoring.
Enclosure Integrity: We specify advanced air-sealing and high-density insulation strategies, including "Net-and-Blow" systems for new builds and "Dense Pack" for retrofits. Our goal is to maximize effective R-values while properly aligning your home’s vapor, air, and thermal boundaries.
Mark Hensley | Principal & Founder
Mark Hensley | Principal & Founder
Precision Performance. Data-Driven Results.
Mark Hensley provides a rare combination of 30 years in the construction trades and 16 years as a leading specialist in the "physics of the home." Following a deliberate pivot in 2008 to master building science, Mark has personally conducted over 1,000 home performance assessments across every corner of the Los Angeles basin.
From the moisture-challenged historic bungalows of Venice Beach to the thermal extremes and legendary Craftsman architecture of Pasadena, Mark’s career is defined by an unparalleled library of "As-Built" data. By combining this longitudinal experience with his background as a patent-holding inventor (U.S. Patent #5,497,633), Mark offers a level of technical oversight that ensures your project isn't just built, but scientifically validated.
1,000+ Assessments: Leveraging a career-spanning dataset of over a thousand residential performance audits to identify systemic failures that standard contractors miss.
Microclimate Mastery: A deep understanding of the unique physics governing the LA region—managing the high humidity of the coastal marine layer and the intense heat-load shifts of the inland valleys.
Architectural Diversity: Decades of hands-on experience with every residential assembly, from the uninsulated lath-and-plaster of 1900s Pasadena to the floor-to-ceiling glass of modern Westside estates.
The Inventor’s Edge: Using a patent-holding background to develop the precision protocols Comfort Quest LA uses to solve the region's most complex thermal challenges.
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