Furnace · AC · Heat pumps · Denver metro since 2011

Heat in January. Cool in July. No surprises on the bill.

Furnace repair and replacement, AC installs, heat pumps that actually work at 5,280 feet, and tune-ups that catch the $200 problem before it's a $2,000 one.

Flat diagnostic fee, waived with repairWritten quote before work startsFinancing availableLicensed & EPA certified
Serving Thornton, Westminster, Denver, Aurora, Centennial, Broomfield, Commerce City, NorthglennMon–Fri 7 AM–7 PM · Sat 8–4 · Emergency heat calls 24/7
What customers say

4.8 stars on Google

★★★★★

"Furnace quit at 9 PM in February. Tech was here by 10:30, replaced the igniter, and didn't try to sell me a new furnace. That's why I'll call them again."

K. Brennan, Thornton
★★★★★

"Got three quotes for AC. Mile High was the only one who measured the house instead of eyeballing it, and the price was in the middle. Install crew was clean and fast."

A. Patel, Centennial
★★★★★

"Heat pump install with the Xcel rebate. They handled every form. House is warmer than it was with the old furnace and the gas bill dropped."

S. Lindqvist, Westminster

Sample reviews for demo purposes. On a live site this block shows the business's real Google reviews with a link to leave one.

Read all reviews on Google

Install crew & van photo
Why us

We size it, we show you, we stand behind it

Most HVAC complaints come from the wrong-size system sold by a commissioned tech. We don't pay commissions. Every replacement gets a proper load calculation, a written quote with the model numbers on it, and a 2-year labor warranty on top of the manufacturer's.

Altitude matters: equipment loses capacity at 5,280 feet, and a lot of installers ignore it. We don't.

About Mile High

No heat? No cool? Weird noise?

Call. We'll tell you what it's likely to be and what it costs before we come out.

Call (720) 555-0188
Call nowGet a quote