Same-day & 24/7
Emergency techs on call around the clock — no heat or no cool never waits.
24/7 Emergency Same-day service across the Front Range
Home comfort in every season.
From heat waves to cold snaps, Northline keeps your home comfortable with fast, honest heating, cooling & air-quality service — backed by upfront pricing and a satisfaction guarantee.
Licensed, bonded & insured NATE-certified techs Upfront flat-rate pricing
4.9/51,200+ verified reviews
Why Northline
The contractor you'd recommend to a neighbor.
We've built our reputation on doing it right the first time — clear pricing, clean work, and technicians who treat your home like their own.
Upfront flat-rate
You approve the price before we start. No surprises, no overtime fees.
NATE-certified
Background-checked, factory-trained technicians who respect your home.
Guaranteed work
100% satisfaction guarantee backed by parts & labor warranties.
15+Years in business
24/7Emergency service
12k+Homes served
4.9★Average rating
Financing available
Comfort now, pay over time.
Qualified homeowners can finance a new system with 0% APR intro plans and low monthly payments. Fast approvals — often while your technician is still on site.
Subject to credit approval. Ask your comfort advisor for current terms.
Tune-Up Club
Maintenance that pays for itself.
Join our maintenance membership for seasonal tune-ups, priority scheduling, and members-only pricing on every repair.
Comfort
$14/mo
Essential coverage to keep a single system healthy.
- 1 precision tune-up per year
- Priority scheduling
- 15% off all repairs
- No overtime/diagnostic fees
Comfort Plus
$24/mo
Our most popular plan — full seasonal care for heat & AC.
- 1 precision tune-up per year
- Priority scheduling
- 15% off all repairs
- No overtime/diagnostic fees
Whole-Home
$39/mo
Complete coverage for larger or multi-system homes.
- 1 precision tune-up per year
- Priority scheduling
- 15% off all repairs
- No overtime/diagnostic fees
Trusted to install & service every major brand
Reviews
Rated 4.9 by Front Range homeowners.
Real reviews from real neighbors — the reason most of our work comes from referrals.
Our AC died in a July heat wave and Northline had a tech out within two hours. Honest pricing, fixed it fast, and the tech was so respectful of our house.
Marcus D.Denver, CO Signed up for the Comfort Plus plan after our furnace tune-up. They caught a cracked heat exchanger before it became dangerous. Genuinely grateful.
Priya S.Centennial, CO Replaced our 20-year-old system with a heat pump. Clean install, walked us through the financing, and our energy bill dropped noticeably.
The Alvarez FamilyArvada, CO Good to know
Answers before you book.
A few of the questions we hear most. See the full list on our FAQ page.
Yes — we answer calls 24/7, 365 days a year. A live technician (never a machine) will help triage your no-heat or no-cool emergency and get someone dispatched fast.
For most homes, every 90 days — but if you have pets, allergies, or run your system hard, check monthly. A clean filter is the single easiest way to protect your equipment and air quality.
Most residential replacements are completed in a single day. Larger or multi-system homes may take two. We give you an exact timeline before we start.
It depends on your square footage, insulation, windows, and layout — not just a rule of thumb. We perform a proper load calculation so your system is sized right, not just big.
$79 Seasonal tune-up
Get ahead of the season.
Book your precision tune-up now and head into summer or winter with a system that's ready. Limited seasonal pricing for new customers.
Standard residential systems. Cannot be combined with other offers. Mention code CLIMATE.