Advanced, energy-efficient comfort systems for Denver-metro homes and small businesses. Installations, repairs and tune-ups done by people who answer the phone — call (720) 948-5292, Mon–Sat 7AM–5PM.
NexGen HVAC builds comfort systems around how Denver actually lives — thin mountain air, 300 days of sun, and winters that arrive overnight. We size every system to the house, not the catalog, and we explain the options in plain numbers before any work starts.
Most of our calls are replacements and second opinions: an aging furnace that short-cycles, an AC that can't keep up with a July heat wave, or a quote from someone else that didn't add up. We diagnose first, show you what's wrong, and give you repair-versus-replace math you can check yourself.
We're a local crew, not a call center. When you call (720) 948-5292 you talk to the people who will show up at your door. Mon–Sat 7AM–5PM, and we keep slots open for no-heat and no-cool emergencies.
Every job starts with a written diagnosis and a flat quote. No work begins until you approve the number.
01Right-sized central air systems for Denver-metro homes, with load calculations and ductwork checks included in every bid.
Install 02Capacitors, contactors, refrigerant leaks, frozen coils — most cooling failures diagnosed and fixed same visit.
Repair 03Full cooling-system check: coils, refrigerant charge, electrical, airflow. Catches the small stuff before July does.
Maintain 04Year-round heating and cooling from one system. A strong fit for Colorado's mild shoulder seasons and high sun.
Install 05High-efficiency gas furnaces, sized to the home. Repairs from ignitors to blower motors, heat exchangers inspected.
Heat 06Room-by-room comfort for additions, garages and finished basements — no ductwork required.
Install 07Filtration, humidity control and ventilation upgrades for cleaner air through wildfire season and winter.
Air 08Install and setup of learning thermostats, wired correctly and paired to your system for real savings.
ControlsCall or quote form. Tell us what's happening; we book a window that fits your day.
On-site diagnosis. We test, measure and show you the failed part — not just name it.
Flat quote. One written number for repair vs. replace. You approve before we touch a wrench.
Done & tested. We commission the system, walk you through it, and haul the old unit away.
Denver weather doesn't wait, and neither do we. If your furnace quits on a January night or the AC dies mid–heat wave, call (720) 948-5292. We hold same-day slots for no-heat and no-cool calls, Mon–Sat 7AM–5PM.
"Professional, on time with great pricing. I would recommend NexGen HVAC to anyone looking for quality work."
— Customer review · 5/5"Mike has great work ethics. He treats his customers with respect and kindness. He does what he says he will do and helps you figure out how to save money if he can."
— Customer review · 5/5"NexGen HVAC installed a rooftop unit for my business. Very reliable, very professional."
— Customer review · 5/5Licensed & insured. Written quotes on every job. Old equipment hauled away on installs.
Our cooling tune-up starts at $89 (Sample). It covers coils, refrigerant charge, electrical connections and airflow — about 60–90 minutes on site.
If the repair costs more than half of a replacement and the system is over 12 years old, replacement usually wins. We show you both numbers side by side so you can decide.
We're based in Aurora and cover the Denver metro: Denver, Boulder, Centennial, Lakewood, Littleton, Arvada and Parker. Ask if you're nearby — we often say yes.
Mon–Sat 7AM–5PM we hold same-day slots for no-heat and no-cool calls. Standard repairs are usually booked within 1–2 days.
Ask us about current options when we quote — terms vary by season and equipment. The quote itself is always free.
Don't wait for morning. Call now and we'll get a tech on the schedule first thing — same-day slots held daily for no-heat and no-cool emergencies.
CALL (720) 948-5292Tell us what's going on — we'll call back during business hours (Mon–Sat 7AM–5PM) with a time window and a flat quote.
Demo form — submitting opens your email app. Prefer to talk? Call (720) 948-5292.
Full liability coverage on every job. Credentials available on request before we start.
Flat, itemized numbers approved by you before any work begins. The price we quote is the price you pay.
Manufacturer training kept current across the equipment we install.