Greeley Furnace Colorado About Us

About Greeley Furnace Colorado

Greeley Furnace Company (formerly Local Furnace) has been a locally-owned and operated furnace and HVAC company serving Northern Colorado and Weld County since 1958. In 2017, longtime industry professionals Scott Stevens and Patty Graves purchased Greeley Furnace and continued with the same commitment it always had, providing a superior level of customer service, technical knowledge, and professionalism. Greeley Furnace has been on call 24 hours a day to serve the HVAC needs of Greeley and Weld County residents for over 60 years. That longevity and commitment to customer satisfaction have earned us a long list of very happy customers. Give us a try and you’ll see why we have served more homeowners than any other company in Weld County.


In 2017 Greeley Furnace celebrated 60 years of experience in the industry and serving Greeley and Weld County. Our staff has a combined expertise of over 70 years in the HVAC industry. Just ask our “cool customers” why they continue to use or recommend Greeley Furnace after so many years, and they’ll all say the same thing: “What Service. What a wonderful team of AC and Heat specialists.”

“Great repair technician Ralph Got AC working. Ralph and Scott were awesome! The fact that they dispatched a tech to come out in the evening to fix my broken...
–Joe B., Yelp

Office Staff

Scott Stevens, Owner of Greeley Furnace Colorado

Scott Stevens
Owner / General Manager

Scott has been with Greeley Furnace since March of 2015, with over 35 years of experience in the HVAC industry. He holds a Bachelors of Science Degree with a minor in Business Management from Texas Tech University, he also holds an Associate’s Degree in Applied Science Technologies (HVAC). His experience expands from being a Regional Business Director with ICOR (an international refrigerant manufacturing company) covering the west coast of the U.S., Sr. Technical and Sales account manager for Siemens Building Technology in Littleton Colorado. Scott was also the founder/owner of Laboratory Solutions in Albuquerque N.M., which he secured exclusive contracts with Sandia National Laboratories, Los Alamos National Laboratories, and The University of New Mexico Research Facilities.

Scott holds certifications in Building Automation Controls, DDC controls, Buildings Performance Institute (BPI), NATE (North American Technician Excellence) certifications in Air Conditioning, Heat Pump, Service, and Install Technology. NCI (National Comfort Institute) certifications in Carbon Monoxide & Combustion, Residential & Commercial Air Balancing, and HVAC System Performance. Scott’s broad range of technical and business management experience provides a great resource for Greeley Furnace Heating & Air (a 60-year-old company) and their customers.

Scott grew up in Tahoka, a small town in Texas, and is a veteran of the United States Air Force, Special Operations Wing. In his spare time, he enjoys camping, backpacking, and 4-wheeling in his 1976 CJ-7 Jeep with his two German Shepherd dogs.

Greeley Furnace Patty Graves

Patty Graves
Owner/Office Manager

Patty has been with Greeley Furnace since April of 2012 and brings 31 years of financial and customer relations experience. She is responsible for all areas relating to the financial reporting of Greeley Furnace. Her responsibilities encompass many aspects of our business to include Financial Modeling, Management Reporting, Budgeting, Forecasting, Internal Controls, Procedures, Revenue Recognitions, Consolidations, Profit & Loss and Balance Sheet.

Patty has gained extensive accounting experience through senior accountant and management roles for a variety of companies located in Wyoming & Colorado. From small to medium-sized businesses, Patty has expertise in providing comprehensive accounting services, including Accounts Payable, Accounts Receivable, Human Resources, and Payroll to include processing of sales tax and payroll tax reports.   She excels with all levels of the organization, leads by example, builds diverse and high performing teams, and earns respect and follow through on commitments, extremely disciplined with firm integrity.

Patty grew up in Wyoming and moved to Colorado in 2009. In her spare time, she enjoys spending time with her Husband, John, and son, Tristin.

Keith Gray Greeley Furnace

Keith Gray
Comfort Advisor / Estimator

Keith has been in the HVAC industry since 1972, starting out in new construction installations and has been with Greeley Furnace Heating & Air since April of 2015. His focus has always been in designing and installing high efficiency equipment and indoor air quality products to create an efficient and healthy home.

Keith has kept up with the changing HVAC industry by attending seminars and training. Certifications obtained include NATE Certification in Gas Furnace and Installation Technician, and Ground Source Heat Pump Design and Installation. He also has a Building Performance Institute Certification in Building Envelope and Building Analyst, as well as Master Home Educator for the City of Ft. Collins.

Being a Colorado Native, Keith enjoys spending time in the outdoors. Some hobbies include traveling, supporting the local music scene, volunteering for city and charitable organizations and wine tastings.

Ralph Greeley Furnace Colorado

Ralph Aguirre
Service Technician/Installer

Ralph started with Greeley Furnace Heating & Air in October of 2008 and has been an intricate member of the team from the beginning. As a Service/Maintenance/Installation Technician with 17 years HVAC experience, he has come to believe that ‘performing the job correctly, thoroughly and having the customer completely satisfied with the work performed’ is his motto. Ralph is NATE (North American Technician Excellence) certified in Air Conditioning, Heat Pump, Service, and Install Technology.

He has been in Colorado since 1982 and loves to garden specializing in the salsa vegetables. Ralph's hobbies included golfing and cooking in his spare time.

LuLu Greely Furnace

Lulu Naranjo
Customer Support Representative

LuAnna “LuLu” has been with Greeley Furnace Heating & Air since November 2017 as a Dispatcher/Customer Support Representative. She is responsible for maintaining and scheduling customers for all of their HVAC needs. LuLu has over 20+ years of office experience and enjoys customer relations and being the first point of contact.  She is always looking for a way to help out her coworkers and company.

LuAnna has lived in Colorado all her life. In her spare time, she enjoys spending time with her husband (Nick) of 13 years, her 2 boys (Nathan and Damon Jimenez), daughter in law Jessica (Nathan) and daughter Rebecca. She especially enjoys being a first-time grandparent and spending time with her new grandbabies (Shayla and Zayne). LuAnna also enjoys her collection of Winnie the Pooh and purple stuff, she loves watching sports and learning new things.

Service & Installation Department

Matthew Alvarez Greeley Furnace

Matt Alvarez
Service Technician

Matt started with Greeley Furnace Heating & Air in May of 2012 as a Service/Maintenance Technician with an Associate’s Degree in Occupational Studies for HVAC/R. He has lived in Colorado for 29 years and enjoys working with his hands and using the knowledge that he learned in trade school and putting it to use. Matt is NATE (North American Technician Excellence) certified in Air Conditioning, Heat Pump, Service, and Install Technology.


Luis Aguirre
Journeyman Installer

Luis is a member of our Installation Department, and has spent over 20 years in the HVAC industry and has been a Colorado resident for over 13 years. Luis takes pride in every installation that he does. Every installation requires Luis' special touch by customizing the sheet metal to fit each installation. He has yet to meet a job that cannot be upgraded and takes pride in his work. Luis is NATE Certificated of HVAC systems.

Luis enjoys working with his hands and spends his off time on home improvements.


Luis Aguirre, Jr.
Install Technician

Junior has been with Greeley Furnace Heating & Air since 2013 as an Install Technician and enjoys being mentored by his father in the HVAC trade. During his time at Greeley Furnace Co he has yet to encounter an install application or problem that he could not resolve and complete to the highest HVAC standards. Junior is a valuable asset to Greeley Furnace Heating & Air insuring the highest quality craftsmanship which meets or exceeds industry standards.

In his spare time he enjoys spending time with his son, Luis Xavier and his girlfriend Analy.