About Breathe LA 365.

The brand position: comfort lab, not commodity HVAC

Breathe LA 365 is a healthy-home comfort lab for Los Angeles homeowners who are not shopping for metal boxes. They are trying to help a child sleep through warm summer nights, keep a primary bedroom quiet enough for a partner who works nights, prepare a Pasadena foothill home for the next wildfire smoke event, reduce dust paths in a pet-heavy postwar bungalow, or replace 18-year-old equipment without losing the room outcome they were already promised by the previous installer.

The voice is calm, practical, and specific. We do not use medical claims as sales copy. We do not invoke "miracle filters" or "hospital-grade air." We use room mapping, static pressure measurement, AHRI matching, filter cabinet design, and install discipline to make HVAC decisions easier for homeowners to verify and trust. When a competing quote is the better choice, we say so. When the right project is half the size of the quote you already received, we say so in writing.

The engineer behind every scope

Marcus Reyes, P.E. is the Lead Mechanical Engineer & Comfort Lab Director at Breathe LA 365. Marcus Reyes leads design, diagnostics, and installation oversight at Breathe LA 365. After 17 years engineering residential HVAC across Los Angeles County, including high-efficiency heat pump retrofits, ductless multi-zone projects, MERV 13-ready filter cabinet design, and post-wildfire indoor air recovery, he writes the technical scope for every comfort audit and supervises commissioning readings on installed systems. His Comfort Lab approach starts from a measured room outcome rather than nameplate tonnage.

Credentials include P.E. (Mechanical, California), ASHRAE Member, BPI Heat Pump Energy Professional (HEP-IDL), NATE-certified Air Distribution, Title 24 Energy Code Compliance. Marcus Reyes graduated from B.S. Mechanical Engineering, University of Southern California with a B.S. in Mechanical Engineering and has spent 17 years engineering residential HVAC across Los Angeles County. His focus areas span heat pump load matching, static pressure diagnostics, wildfire smoke filtration design, ductless head placement and acoustics, Title 24 permit-ready scope writing. Every comfort audit at Breathe LA 365 is signed under his name; every install package includes his commissioning readings; every guide on this site is written or technically reviewed by him.

Service area across Los Angeles County

Breathe LA 365 serves Los Angeles, Pasadena, Santa Monica, Beverly Hills, Burbank, Glendale, Culver City, West Hollywood, Long Beach, Manhattan Beach, Calabasas, Malibu, and surrounding Los Angeles County neighborhoods including Studio City, Sherman Oaks, Encino, Tarzana, Woodland Hills, Pacific Palisades, Brentwood, Mar Vista, Venice, Redondo Beach, Torrance, Silver Lake, Echo Park, Highland Park, Eagle Rock, Los Feliz, Hollywood Hills, Downtown Los Angeles, Koreatown, Inglewood, La Cañada Flintridge, and Altadena. Each city has its own building department; we handle permit submission, AHRI documentation, Title 24 compliance, and inspection coordination as part of every install.

Service utility coordination spans LADWP, Southern California Edison, Pasadena Water and Power, Glendale Water and Power, Burbank Water and Power, Long Beach Utilities, and SoCalGas where rebate or fuel transition is part of the project.

Sources we cite throughout the site

Every guide, audit report, and install scope on this site is built against authoritative public sources: LADWP Consumer Rebate Program, TECH Clean California HEEHRA status, California 2025 Energy Code, LADBS Mechanical HVAC Permits, EPA MERV guidance, and others. Engineering decisions are not made from marketing copy; they are made from EPA filtration guidance, ASHRAE 62.2 ventilation standards, AHRI equipment ratings, CARB and AirNow particulate data, CDC healthy housing references, the California Energy Commission Heat Pump Program, LADWP Consumer Rebate documentation, TECH Clean California incentive tracking, and the 2025 Title 24 Energy Code.