Ultimate Heating, Cooling, Plumbing & Electric video
Embedded on the company's website
Researched rankings in 38 cities across the United States and Canada. Re-checked every 90 days.
Company Facts
The work
Where
Money and guarantees
Editorial Review
The Carrier factory authorization and NATE certification are the standout credentials here, and the flat-rate pricing removes a common source of billing disputes, though the geothermal option is worth asking about directly since it is easy to miss on the site.
Best for: Flat-rate furnace and AC replacement
Customer ratings shown here come from Google. They are separate from our editorial review above.
Google rating
4.8
Based on 1244 Google reviews
Review data updated September 22, 2026
The distribution reflects the 1244 Google reviews available when this profile's review data was last refreshed on September 22, 2026. Ratings and counts change continuously on Google, so figures here may lag the live profile slightly. We publish only the values returned by the source, never estimates for missing bands.
Editorial Ranking
It holds position 2 in 10 Best HVAC Companies in Denver, CO (2026).
Works in HVAC, Plumbing and Electrical.
Based in Denver, CO.
Coverage is as the business describes it, cross-checked against where its recent documented work is. A company will often travel beyond the areas listed here for a large job and decline a small one at the same distance, so confirm your address before scheduling.
Ultimate Heating, Cooling, Plumbing & Electric has operated out of Broadway Street near Elyria-Swansea since 1999, long enough that the company now runs a second office in Castle Rock to cover the south metro. It is a Carrier Factory Authorized Dealer, which means its installers go through Carrier's own training track, and the technicians carry NATE certification on top of that.
The HVAC list runs from routine furnace and AC repair through full replacements, ductless mini-splits, heat pumps, and residential geothermal systems, which is a less common offering among Denver's HVAC shops. Smart thermostats, humidifiers, and dehumidifiers round out the indoor air quality side. The plumbing and electrical crews handle gas line installation, water heaters, sump pumps, and water purification, so a homeowner replacing a furnace can often get an electrical circuit checked on the same visit.
Every quote is flat-rate rather than time-and-materials, which means the price is set before the crew starts rather than adjusted afterward, and the company offers financing plans for larger jobs. A satisfaction guarantee backs the work, and the office answers calls for emergency service around the clock. Additional recognitions include Angi certification and Building Performance Institute credentials, alongside an A+ Better Business Bureau rating.
The website does not publish a direct contact email or individual technician bios, and specific license numbers appear only in small print rather than a dedicated licensing page, so a homeowner who wants to verify a plumber or electrician's Colorado registration before the visit should ask the dispatcher directly rather than search the site.
Ultimate suits homeowners replacing older equipment who want manufacturer-backed installation and a fixed price before work begins. It suits less well someone who wants to browse technician credentials or reviews on the company's own site first, since that detail lives with Google rather than the company page. Before booking, confirm the specific plumbing or electrical license number for the technician assigned and ask whether the geothermal or heat pump work is covered under the same financing terms as a standard furnace swap.
Company history, ownership and capability details on this page are provided by the business and reviewed by our editors for plausibility and consistency. They are not the same as the credentials block, where each item carries its own verification status and source.
Verified means we checked the credential against the authority that issues it and recorded the date. Reported means the business told us and we could not independently confirm it. We publish both, labelled, rather than dropping what we could not check.
We show each source separately rather than blending them into a single score, because they measure different things.
4.8/ 5
1244 customer reviews
Editorially reviewed
Ranked #2 in Denver hvac, September 2026
What this company publishes about its own pricing.
What Denver homeowners generally pay, independent of this company.
Business-submitted, reviewed by our editors
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Ultimate holds Colorado plumbing contractor license PC 0004741, master plumber license MP 00178781, electrical contractor license EC 0102560, and master electrician license ME 0029285. It is also a Carrier Factory Authorized Dealer with NATE-certified technicians.
Yes, Ultimate answers calls for emergency heating, cooling, plumbing, and electrical issues around the clock from its Denver and Castle Rock offices.
Yes. Ultimate gives free in-home estimates, uses flat-rate pricing set before work begins, and offers financing plans for larger furnace, AC, or geothermal installations.
We checked 0 of 6 credentials against the issuing authority. Verified items carry the date we checked; reported items are what the business told us and we could not independently confirm.
Denver. Coverage is as the business describes it, cross-checked against where its recent documented work is. Confirm your address before scheduling, particularly at the edge of a service area.
Yes, the company lists emergency availability. Response time depends on demand, and after a storm every company in the market is stretched.
Satisfaction guarantee stated; specific terms not detailed on the site. There are usually two warranties on a job: the manufacturer covers materials, the contractor covers workmanship. Get both in writing and check whether the workmanship coverage transfers if you sell.
Credentials come from issuing authorities, ratings from the company's Google Business Profile with the date we read them, and the editorial take from our own review of estimates, warranty documents and public feedback. Anything the business told us is labelled as reported.
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