Denver's No-Nonsense
HVAC Experts
Top Dawg Heating & Air LLC brings military precision and complete honesty to every job. Licensed mechanical contractor serving Denver's finest neighborhoods.
Expert HVAC Services
Done Right the First Time
From emergency repairs to full system installations, we bring licensed expertise and veteran integrity to every Denver home.
Fast, accurate diagnosis on all makes and models. We fix it right the first time — no upsells, no runaround.
Learn More →Expert furnace diagnostics, repair, and high-efficiency installations. Keep Denver winters comfortable.
Learn More →Year-round efficiency. We size, install, and commission heat pump systems to Colorado mechanical code.
Learn More →Ductless systems for additions, garages, and zoned comfort. Expert install with minimal disruption.
Learn More →Seasonal maintenance that extends equipment life and keeps your warranty valid. Prevention beats repair.
Learn More →Heat out at midnight in January? We answer. Same-day emergency service all across metro Denver — always.
Call (303) 720-0086 →Honest Work.
Military Standards.
Gary Lyman founded Top Dawg Heating & Air on one principle: treat every customer the way you'd want your own family treated.
US military veteran Gary Lyman brings discipline, accountability, and precision to every call. You'll never wonder if the job was done right.
Fully licensed and insured in Colorado. We pull permits, follow code, and protect your home's value every time.
Clear quote before we start. No surprise charges, no pressure. Just honest work at a fair price.
When your AC fails in July or your furnace dies in January, we move fast — because Denver weather doesn't wait.
Mech.
Contractor
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The Top Dawg Club
Join and never worry about your HVAC again. Priority service, tune-ups, and exclusive member savings.
Spring AC check and fall furnace inspection included.
Members go to the front of the line — always.
15% off all labor and parts on every repair all year.
Members never pay for diagnostic visits — ever.
Know your equipment's condition so you can plan ahead.
- 2 Tune-Ups (Spring + Fall)
- Priority Service Queue
- 15% Off All Repairs
- No Diagnostic Fees
- Annual System Report
What Denver
Homeowners Say
"Gary came out same-day when our furnace quit in February. Had it running in two hours. No upsell, no nonsense. Exactly the kind of honest business Denver needs."
"Best HVAC company in Denver. On time, explained everything, fair quote, got it done right. Veteran-owned — you can tell by the professionalism."
"Top Dawg was hundreds less than two other quotes and the quality is outstanding. New AC running perfectly a year later."
"Called at 10pm on a Sunday. Gary picked up, diagnosed it over the phone, at our door first thing Monday. Incredible service."
"Top Dawg Club membership already paid for itself. They caught a refrigerant issue during the tune-up that would've been a $1,200 breakdown."
"As a veteran myself I sought out a vet-owned company. Straight talk, fair prices, quality work. My HVAC company for life."
Recent Installations & Repairs
Real jobs across Denver. Every system installed to Colorado code.
Proudly Serving
Metro Denver
Serving homeowners and businesses across the entire Denver metro, including Denver's most prestigious neighborhoods.
Furnace failure in winter. AC breakdown in summer. Call now — we pick up.
Call (303) 720-0086Get a Free Quote
Gary responds within the hour. No obligation, no pressure.