Family-owned in Denver since 1996

Denver's heating and cooling, done right.

Honest diagnostics, upfront pricing, and named technicians your neighbors actually recommend. From a quick AC tune-up to a full ductless mini-split install, we bring warmth and comfort to your home.

Request service Call 303-287-1846

4.8★: 202 Google reviews
25+ yrs: Serving Denver Metro
A+: BBB rating

★★★★★ 5.0

"Integrity like that stands out."

— Eric R., Google review

Colorado License

#231249 • Insured

Open today 7 AM – 8 PM • Servicing all major HVAC brands • Wells Fargo financing available • 60+ yrs combined technician experience

What we do

A full range of heating and cooling for your home.

See every service

Cooling

Air Conditioning

Repair, seasonal tune-ups, and full system replacement on every major brand.

Heating

Furnaces & Boilers

Gas furnace, boiler, and dual-fuel system service, repair, and installation.

Specialty

Ductless Mini-Splits

Heat one stubborn room or condition a whole 1960s home, room by room.

Comfort

Heat Pumps

High-efficiency installation paired with federal and Colorado rebate guidance.

Air Quality

Indoor Air Quality

Filtration, humidification, and air handlers for cleaner Front Range air.

Plans

Cool Maintenance Plans

Customized maintenance agreements tailored to your budget and equipment.

Why Denver chooses us

Not your average contractors.

We're a family-owned crew of fun-loving professionals who take HVAC seriously and homeowners less seriously. Our technicians get named in reviews because they earn it: honest diagnostics, no-pressure recommendations, and clear walk-throughs of every fix.

Meet the crew

Upfront pricing

You hear the number before we lift a wrench. No surprise add-ons, no upsell games.

Certified technicians

Highly trained, NATE-style certified, and named in nearly every 5-star review we receive.

24/7 emergency repair

When the heat goes out at 2 AM, we promise to fix the problem right away.

Financing & rebates

Wells Fargo financing partner. We'll walk you through federal and local HVAC tax credits.

Real reviews

4.8 stars across 202 Google reviews.

Our customers name our technicians by name. Read why.

★★★★★

"Very positive experience with Cool Sunshine. Israel, the Service Manager, was responsive, efficient, and considerate. He diagnosed the problem quickly and suggested the appropriate fix — without adding on unnecessary extras or trying to upsell. Integrity like that stands out."

Eric R.

Google review · 2 months ago

★★★★★

"Truly the most lovely and professional company we've worked with in a long time. Joy was so thoughtful and attentive in finding a creative solution to facilitate installation of a new mini-split system throughout our home. We are finally cool in our 1960s home for the first time since moving in."

Madeline Ross

Google review · 8 months ago

★★★★★

"Sunshine is so wonderful to work with. When our furnace wasn't working, they came out within an hour of calling. The next day they were out within 30 minutes. Always very prompt, professional, and willing to explain the fix and options. Thank you!"

Heather Fitzgerald

Google review · 4 months ago

1996 Founded in Denver, family-owned ever since

A neighborhood crew

A team Denver homeowners actually remember by name.

Cool Sunshine has been keeping Denver Metro homes comfortable since October 1996. We're locally owned, A+ rated by the BBB, and we bring more than 60 years of combined technician experience on every call.

Whether it's an emergency boiler call in the dead of winter, a mini-split design for a stubborn upstairs bedroom, or a full furnace and AC replacement with rebate paperwork handled, we'll show up on time, explain what's happening, and quote the work before we start it.

Colorado License #231249 BBB A+ rated All major HVAC brands

Meet our technicians

Need HVAC service?

Same-day diagnostics across Denver Metro.

Call us or send a request — a technician will be in touch with a window and an upfront estimate.

303-287-1846 Request service online

📍 4395 Oneida St, Denver, CO 80216 • 🕒 Mon–Fri 7 AM – 8 PM