Thin mountain air, 300 days of sun, winters that arrive overnight. NexGen HVAC sizes every system to the house — not the catalog — and explains the options in plain numbers before any work starts. Call (720) 948-5292, Mon–Sat 7AM–5PM.
Right-sized central air with load calculations. Most cooling failures diagnosed and fixed same visit.
One system for heating and cooling — a strong fit for Colorado's mild shoulder seasons.
High-efficiency gas furnaces, sized to the home. Ignitors to blower motors, heat exchangers inspected.
Room-by-room comfort for additions, garages and basements. No ductwork required.
Filtration, humidity and ventilation upgrades for cleaner air through wildfire season and winter.
No-heat and no-cool slots held daily. If Denver weather doesn't wait, neither do we.
Services, straight answers, service towns and a quote form — everything below is the short version of what we'd tell you on the phone.
View ↓Central air systems sized by load calculation, with ductwork checks in every bid.
InstallCapacitors, contactors, refrigerant leaks, frozen coils — fixed same visit in most cases.
RepairCoils, charge, electrical, airflow. 60–90 minutes that prevent July surprises. From $89 (Sample).
MaintainEfficient heating and cooling from one system, serviced year-round.
Install / RepairHigh-efficiency gas furnaces; repairs from ignitors to blower motors.
HeatDuctless comfort for additions and finished basements.
InstallFiltration, humidity control and ventilation upgrades.
AirInstall and setup, wired correctly and paired to your system.
Controls"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."
— Customer review · 5/5"NexGen HVAC installed a rooftop unit for my business. Very reliable, very professional."
— Customer review · 5/5Our cooling tune-up starts at $89 (Sample) — coils, refrigerant charge, electrical and airflow, about 60–90 minutes on site.
If the repair tops half the replacement cost and the system is past 12 years, replacement usually wins. We put both numbers side by side.
Aurora, Denver, Boulder, Centennial, Lakewood, Littleton, Arvada and Parker. Nearby? Ask — we often say yes.
Same-day slots held for no-heat and no-cool calls, Mon–Sat 7AM–5PM. Standard repairs usually within 1–2 days.
Yes. Written, flat and itemized — approved by you before any work starts.
Same-day slots held daily for emergencies, Mon–Sat 7AM–5PM. One call and a tech is on the schedule.
CALL (720) 948-5292Demo form — submitting opens your email app. Prefer to talk? Call (720) 948-5292.
Full liability coverage on every job; credentials available on request.
The price we quote is the price you pay. Approved by you first, always.
Manufacturer training kept current on the equipment we install.