Jefferies
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Jefferies
With over 100 years of combined technical experience, Jefferies Inc. provides quality and superior service for all customers. Though Jefferies Inc. has only had its name since 2007, our large customer base proves the quality of work and service we provide. Our business has been built from the ground up with satisfied residential and commercial customers who have referred us to many friends, families, and associates.

We deliver a level of incomparable customer satisfaction. Our highly-qualified service technicians and installers are ready to help you with your homes heating and cooling needs. We only install high quality factory equipment and components to optimize efficiency and lower long term repair costs. We provide a 2-hour guaranteed response time to all preventive maintenance contract customers.
Services
Over a decade ago, Jefferies Inc. first opened its doors in 2007. The business was inspired by a hope to pave the way on how an HVAC company should be operated. Our passion for our work starts from the top with our founder, Russ Jefferies. We take the utmost pride in every job we do and are dedicated to serving our customers and community with the highest level of support.
Regardless of noticeable symptoms, poor air quality can have a damaging effect on the health and wellbeing of anyone in your home, even if they're not ill or have an otherwise compromised immune system. Jefferies Inc. can provide air quality solutions such as air purifiers, air filtration systems, humidifiers and dehumidifiers, UV germicidal lights, duct replacement and installs, and duct sealing, cleaning, and repairs.
Denver's hot summers and freezing winters can turn an unventilated home into a sauna or a refrigerator in a matter of hours. To get your system up and running again as quickly as possible, call Denver's HVAC experts at Jefferies Inc., and we will send one of our professional and friendly technicians to repair your air conditioning in a timely manner, at the best possible price to you.
Many HVAC companies in Denver lack the expertise for proper boiler service. At Jefferies Inc., our highly trained and certified technicians have the experience and equipment necessary for the complex task of boiler repair and maintenance. Boiler systems provide heat to your home or business, and can be a very efficient heating method.
For a simple, affordable, all in one heating and cooling solution, consider ductless HVAC. Ductless heating and air conditioning (sometimes referred to as mini-split AC) is an HVAC system that, as the name implies, heats and cools your home without the use of air ducts. They consist of two parts - an interior unit that heats and cools your home, and an exterior unit on the outside of the building.
Reviews (8)
Kate Olsen
Kate Olsen
Jan 06, 2021
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We had 3 people out and we were getting pushed to replace the AC. Russ was able to fix it without replace 9 different things and get our house back to comfortable when we are both working from home.
Anne B.
Anne B.
Jul 08, 2019
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What a wonderful professional company! My AC's Reset light kept coming on, and it couldn't cool below 76 degrees. Russ came out, was on time, called before arriving, and got it fixed quickly. No hidden costs. He showed me everything he was doing as he did it, including pics of the more damaged parts of the unit, so I wouldn't have to climb up on the ladder myself. It was really great to find someone willing to come downtown and work on the heat pump (no parking close by, mid-rise building with awkward placement of unit in hard-to-reach area in crawlspace above the bathroom) that
Adam Baca
Adam Baca
Jun 26, 2019
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I contacted Jeffries Inc. early Saturday morning after waking up with no heat. Russ and I discussed my issues over the phone and he was able to provide me with a possible fix. Russ showed up to my home and was ready to tackle the job. He communicated the issue with me and we discuss the possible options. Russ was very thorough in his work and took his time. I appreciate that he did a quick check of the entire system and not just the issue. He ran me through a few preventive maintenance options and will be making the call to get that scheduled. Overall I'm very please with Jeffries Inc., Russ was
Michael Pk
Michael Pk
Jan 04, 2019
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Without question, the most reliable, reputable and honest sub contractor we have ever dealt with, Russ Jeffries went way beyond the norm to find a way to solve a heating / cooling issue in our 3 year old HTC Lennar home that completely befuddled others who tried to get to the cause of the problem. My wife and I would highly recommend Russ Jeffries for your HVAC needs.
Lindsay O'Brien
Lindsay O'Brien
Nov 06, 2018
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Russ came out to evaluate our house for a new furnace and an AC unit. He was very thorough and friendly. He said that at the time, he was busy but would get us an estimate as soon as he could. After 2 weeks of not hearing from him, I called the office and was told that they were just busy and would try to get us the estimate as soon as possible. I have since called the office another 4 times because as I said, he seemed like a really nice guy, came highly recommended, and appeared to be very thorough. Each time I called I was assured that I would get the estimate soon. He came out in May and we
Boyd
Boyd
Oct 09, 2018
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I am writing this review because I am immensely impressed. I called to inquire about needing repairs and on the same day a technician came by. The professionalism, tidiness and attention to detail by Shaun was great. I would heartily recommend contacting Jeffries Inc for your HVAC needs.
Beth Weaver
Beth Weaver
Aug 30, 2017
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Russ is the best! He came out on a Saturday when our boiler pump went out, went the extra mile to source a replacement same-day, and had our heat and hot water back up and running within a couple hours. He didn't even charge us a weekend surcharge! Would highly recommend him and his team.
Darrick L.
Darrick L.
Jun 20, 2016
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You just know your going to have one of those days when you wake up and it's 85* in your house and you can tell your A/C is not working!! After some failed DIY YouTube measures, I knew I needed a professional. Now understand, we are pushing 95* plus the last several days and everyone is having A/C issues!! One phone call to Jefferies inc and Mike was at my door at 11am! He did a great job diagnosing the problem (an extremely dirty blower fan and low A/C coolant) he was in and out in no time and the cost was very reasonable as well!! The house is now cooler then it's been in a long time