We replaced a 14-year-old AC with a ducted Mitsubishi heat pump after our compressor finally gave up. Marcus and his crew actually did a Manual J-style load review instead of just copying the old nameplate. They found we were one ton oversized which explained the short cycling. Six weeks in and our upstairs is finally comfortable for the first time. They also documented everything for the LADWP rebate so we did not have to chase paperwork.
About · Founded 2014 · Engineer-led · 4.9 ★ · 612 LA reviews
HVAC work should feel measured, not improvised
Skyline Thermal Labs is a Los Angeles HVAC company built around mechanical-engineering practice. Founded in 2014 by Marcus Halverson, P.E., LEED AP. 4.9★ from 612 verified reviews across coastal, hillside, valley and historic LA homes.
Engineer-led HVAC
Why Skyline Thermal Labs exists
Skyline Thermal Labs was founded in 2014 by Marcus Halverson, P.E., LEED AP, after 19 years of mechanical-engineering practice across Greater Los Angeles. The company exists because most LA HVAC contractors run sales-led playbooks on 30+ different microclimates with one script. We run an engineering practice instead. Diagnostics happen before recommendations, Manual J load calculations precede equipment selection, commissioning data ships in a written report, and rebate documentation is built into the workflow rather than improvised at submission.
Across the company today: factory-trained on Carrier, Trane, Lennox, Mitsubishi Electric, Daikin, Bosch, Fujitsu, Bryant, Rheem, Goodman, American Standard, York, Ruud, LG and major control platforms. EPA Section 608 universal certification across the crew. A2L-certified for current refrigerants (R-454B, R-32). Background-checked and drug-screened technicians. Ongoing ACCA Manual J/D/S and ASHRAE 62.2 training. Active enrollment in TECH Clean California for heat pump electrification incentives.
Operating philosophy
Los Angeles comfort is a design problem, not a parts-replacement problem. Coastal salt air, valley heat loads, hillside access, historic envelopes and HOA approval cycles all change the right answer. The estimate that ignores those realities is the most common reason new equipment underperforms. We document the load, the duct system, the electrical service, the noise budget and the refrigerant-platform plan before equipment selection enters the conversation.
Our written estimate explains symptoms, tests, constraints, options and risks. It tells the homeowner what was measured, why a repair is enough or why a replacement makes more sense, and which building details may limit performance. Three-path proposals are common when appropriate: stabilize, repair, replace/redesign. The homeowner makes the calm decision. We do not run urgency-based sales scripts.
Coverage and capacity
Skyline Thermal Labs dispatches across 30+ Los Angeles cities and neighborhoods: coastal corridors (Santa Monica, Venice, Manhattan Beach, Redondo Beach, Malibu, Pacific Palisades), Westside (Beverly Hills, Brentwood, Culver City, Mar Vista, Westwood, West Hollywood), hillside (Hollywood Hills, Bel Air), San Fernando Valley (Woodland Hills, Encino, Sherman Oaks, Tarzana, Studio City, Burbank, Calabasas), foothill (Pasadena, Altadena, La Canada Flintridge, Glendale, San Marino, South Pasadena), Eastside Hills (Silver Lake, Los Feliz), Northeast LA (Highland Park, Eagle Rock) and South Bay (Torrance).
Same-day diagnostic windows are typically available across the basin. Emergency dispatch operates 24/7. Standard estimates are returned in writing within 24 hours of the diagnostic visit. Workmanship guarantee is 2 years on installation labor, 1 year on diagnostic repairs.
About the principal engineer
Marcus Halverson, P.E., LEED AP, Principal HVAC Engineer & Founder. Marcus Halverson is a licensed mechanical engineer with 19 years of building-systems experience across Los Angeles, including coastal corrosion-zone work, hillside heat pump retrofits and historic-home airflow redesigns. He leads Skyline Thermal Labs’ diagnostics, commissioning and rebate-documentation standards. Marcus has commissioned more than 1,400 residential systems across Greater Los Angeles, including coastal corrosion-zone work in Santa Monica, Venice and Manhattan Beach; hillside heat pump retrofits in Hollywood Hills, Bel Air and Pacific Palisades; and historic-home airflow redesigns in Pasadena, Los Feliz and South Pasadena. He sits on technical-advisory committees for ASHRAE local chapter education and contributes to ACCA Manual D peer-review work.
Engineer-led HVAC, reviewed by neighbors
What Los Angeles homeowners actually say
4.9 ★ average from 612 verified reviews — every quote below is also embedded in this page’s Product schema with star ratings.
Called Skyline Thermal Labs at 7am on a Saturday when our AC stopped cooling during the heat wave. Tech was at our place by 11am, diagnosed a failed run capacitor and a low charge from a slow leak in the line set. Fixed the capacitor on the spot, scheduled the leak repair for Monday with a temporary fix so we had cooling overnight. Honest pricing and they explained everything before doing the work.
Our condenser was eaten alive by salt air after only six years. Skyline came out, did a corrosion audit and recommended a coastal-rated unit with a coil coating instead of just selling us another standard system. The install was clean, the line set was hidden behind the side yard fence and they walked us through a coastal maintenance schedule. No upsell pressure. Refreshing.
We have a 1923 Craftsman so any HVAC work is tricky. Three other companies wanted to gut our ceilings to redo the ducts. Skyline figured out a hybrid plan: keep the existing trunk, add two return-air drops and put a slim-ducted Daikin system upstairs. Quiet, efficient, and we did not lose a single piece of original molding. Worth every dollar for the design thinking alone.
After the 2025 fires our Sherman Oaks home had smoke residue in the ducts and our older filter cabinet was bypassing air around the filter. The team sealed the cabinet, upgraded us to a MERV 13 media filter that actually fits, and showed us how to use the fan-only mode during smoke events. Particle counts in the bedrooms dropped within an hour. Our youngest stopped waking up congested.
Our place is on a steep lot in Laurel Canyon. Two contractors said they could not place a condenser without a crane. Skyline routed a longer line set to a side terrace, used a wall-mount platform with vibration isolators and the unit is dead silent at the property line. They also pulled the permit and dealt with our nervous neighbor. Very pro.
FAQ
Common questions about working with us
Can I get a same-day HVAC service appointment in Los Angeles?
Most Los Angeles requests are triaged within the same business hour. Standard diagnostics in Los Angeles are typically scheduled same-day or next-day depending on urgency, equipment access and current dispatch load. Emergency comfort failures get priority routing 24/7. Average dispatch arrival window for Los Angeles runs 34–64 minutes during business hours.
Why does HVAC service pricing vary so much across Los Angeles?
Los Angeles HVAC service pricing falls between $129 and $24 500. Variables that move the number include indoor coil match, line-set length and lift, condensate routing, panel capacity, HOA approval cycles and after-hours dispatch. The estimate explains each variable in writing rather than burying it in the labor line.
Which HVAC brands does Skyline Thermal Labs install and repair?
Yes. Skyline Thermal Labs services Carrier, Trane, Lennox, Mitsubishi Electric, Daikin, Bosch, Fujitsu, Bryant, Rheem, Goodman, American Standard, York, Ruud, LG and major control platforms (Nest, ecobee, Honeywell Home, communicating thermostats). Brand-specific diagnostics — ComfortLink fault codes, Infinity fault history, Mitsubishi M-NET errors, Daikin One commissioning data — are matched to the equipment installed at your home.
What credentials does the crew carry?
Every Skyline Thermal Labs technician completes a background check, drug screening and brand-platform certification before entering customer homes. The company carries general liability and workers’ compensation coverage, and our installation managers hold EPA Section 608 universal certification for refrigerant handling. Our crew is also A2L-certified for current refrigerant platforms (R-454B, R-32). Documentation is available on request.
Can I use rebates or financing for HVAC work in Los Angeles?
Yes — LADWP, TECH Clean California and federal credit documentation is built into our workflow, not improvised at submission. The folder includes the AHRI matchup certificate, manufacturer specification sheets, paid invoice, permit card and commissioning data. Financing options run from 0% promotional periods (12–24 months) through 5–12 year low-APR plans (6.99–9.99% APR depending on credit). We do not mark up financing.
What is the workmanship guarantee on installation labor?
Our 2-year workmanship guarantee covers installation labor; the 1-year diagnostic-repair guarantee covers parts replacement on the original repaired component. Manufacturer parts warranties typically extend 10 years (with timely registration); compressor warranties on premium platforms reach 10–12 years. We register the warranty on your behalf when you provide serial numbers within 60 days.