Meet the team at A-1 Guaranteed Heating & Air. We have been providing HVAC installation and heating and air conditioning repair in the bay area for over 20 years and have become one of the best because of our dedicated and hardworking team of heating and air conditioning professionals. We’re all pleased to meet you.

Krissy & Richard Hiteshew with A-1 Guaranteed heating and air conditioning repair

Richard began A-1 Guaranteed Heating & Air, Inc. with his wife Krissy in 1996. His career in the HVAC trade began when he was 16 years old and got a job with his brothers at the same company they were at. He began as a shop boy in the warehouse. He also held other positions such as Service, Install and now owner. Krissy began her career in the HVAC when the business began. Having absolutely no previous experience in the field has provided an opportunity to learn something new every day. Prior to A-1 Guaranteed, she was an Admin Assistant, Billing Clerk and a Bookkeeper which has helped in the daily operation of the business. Richard and Krissy met while they were teenagers and have been happily married since 1989. When they began the business, they lived in a small 2 bedroom house and were pregnant with their 3rd child. They started in their garage. The company phone number was actually their home number that they used for the business and eventually had to get a personal number to keep the two separate. They have 4 children together, 3 of which are also in the business. A-1 Guaranteed became incorporated in April 2004.

Matt Hiteshew with A-1 Guaranteed heating and air conditioning repair

Matt has been in the HVAC trade with A-1 Guaranteed since 2005. He has grown up in this trade with a father, brother and uncles before him. He is NATE certified in Heat Install, AC Install & Air Distribution & BPI Certified. He has been employed with A-1 Guaranteed since 2005. Matt is married with 3 young children.

Matt is a lead installer with service experience. He loves solving people’s heating and air conditioning repair problems and would be glad to help you solve yours!


Casey has been in the HVAC trade for over 15 years. He began working in the trade by working at his uncle’s company. He worked there for 13 years before he began his employment with A-1 Guaranteed in 2009. He has certifications in Diamondback, Track Piping and Universal Refrigerants and is BPI Certified. Casey has completed Title 24 Duct Installation, Standards, & Diagnostic testing. He has a teenage daughter. Casey is a Lead Installer.


Kasey joined the family business with very little experience in the HVAC trade or even administrative duties. She has grown up in the business since she was 5 years old. She started out putting stickers and stamps on envelopes as a child and worked as an Admin Assistant while she was a student. Officially she began working for A-1 Guaranteed in 2005. Kasey was the inspiration for A-1 Guaranteed when her dad had to miss one of her birthday parties because he wasn’t able to get the weekend off, prompting him to start his own business. She graduated with Honors with an Associates in Business while working with the company.

Kasey is our Special Projects Manager. She has been solely responsible for setting up the company with new scheduling programs and multiple trainings. She also is the creator of our newsletters and handles all of the IT issues and software programs.


Joe has been in the HVAC trade for more than 19 years. He attended and graduated from Sequoia Institute.He is a BPI Certified Building Analyst Professional and is Nate Certified in AC Install, Gas Furnace Service and Gas Furnace Install. He is a type II technician certified in Diamondback Installation & is a Certified Heat Exchanger Expert. In addition to these certifications, he is also a Checkme! Program Certified Technician for AC Diagnostic Testing & Duct Diagnostic Testing. Joe is our longest employed co-worker beginning his partnership with A-1 Guaranteed in 2001. Joe is married with one daughter.Joe is the Install Manager who also works as a Service Tech and at times as a Comfort Advisor. He got into the HVAC trade because he like working with his hands and the freedom of not being behind a desk.


Larry has grown up around the HVAC trade. He is a second generation and one of three brothers to have embraced the HVAC trade. He has been in the HVAC business for 30 years. He graduated from Universal Technical Institute in 1982. He is a BPI Certified Home Analyst and NATE certified in AC Install, AC Service, Furnace Install, AC Install, Heat Pump Install & Service Install. He has been employed with A-1 Guaranteed since 2008. Larry is married with four children and two grandchildren.

Originally he was hired to expand our Service Department as the Service Manager which had grown leaps and bounds under his management. Larry devotes all of his time to being a Comfort Advisor, helping his customers build the ultimate comfort products for their homes.


Dave has been in the HVAC trade for over 34 years. After serving in the Air Force, he enrolled in HVAC trade school. He has been involved in almost every aspect of the HVAC trade, working in Install and Service Departments. He was a foreman for a large residential company and owned his own HVAC company for 10 years before becoming a Territory Manager for Trane. Dave is married with 2 kids and loves spending time with his four grandchildren.

Dave is the Sales Manager and oversees the installations of Residential and Commercial Customers. He enjoys being in the HVAC trade because he is learning something new every day.


Jason began working with us in August of 2014 but is not new to this business! He started in the HVAC/R business over 23 years ago, 17 of these years were spent as an installer of residential, light commercial, commercial, restaurant/refrigeration, and experimental, HVAC/R equipment. Holding multiple positions has made him extremely knowledge in all aspects of his job. He has ran service calls, been a lead, field supervisor, and has also been responsible for the design and engineering of many of those jobs. Jason has been through Service Tech school, graduating and received his certification as a Service Technician. He holds multiple certifications including R410A, Universal EPA, Mobile Refrigeration certifications and is certified as a Heat Exchanger Expert by Heat Exchanger Experts. He has also received Nate Certifications in Heat Pump & Air Conditioning for Service and for Install.
Jason has been married for over 22 years and has 4 children. He enjoys anything to do with International harvester, Scout 80’s, Baby Scouts and has even restored old cub cadet garden tractors. He enjoys anything outdoors as long as it’s with his family. Recently Jason had been promoted to our Service Manager and is already making changes that will benefit the customers as well as the company in positive ways.


Kirk has been in the HVAC business since 2007, joining the A-1 Guaranteed team in October of 2014. He has been through multiple trainings to sharpen his skills. The reason Kirk got into this field is because he enjoys meeting people and through his honesty, dignity and respect wants to make sure his customers get the best overall value for their money. He is married with one child.
Kirk is a Comfort Advisor who strives to find comfort solutions for multiple types of homes. He considers himself a happy go lucky guy and we would have to agree with him!


David has been dabbling in the HVAC field for over 20 years. He has worked with A-1 Guaranteed off and on throughout the lifetime of the company finally becoming a full time employee in March of 2014. He is a certified welder and has knowledge in multiple trades of construction safety.
David is currently our warehouse manager. He orders, stocks and delivers equipment and supplies for all aspects of jobs. He enjoys hunting and fishing.


Carlos began his career in the HVAC field 13 years ago doing new construction after which he attended and graduated Specialty HVAC School. He began with A-1 Guaranteed in December of 2015 and currently holds multiple certifications including: EPA Universal, NCI, BPI & Nate certifications.
Carlos is married with three children. He loves Heating and Air Conditioning repair, especially the air conditioning side of the business, stating, “it’s the best invention ever”. He loves fixing things, getting people comfort and doing it the right way. Currently Carlos is a Senior Service Technician and also does some sales.


Nick has been involved with the business since it began. As a young child he would help his father with multiple tasks such as helping on service/installs and fabrication of sheet metal and performing tasks when school was out. He would help in the warehouses and keep the shop cleaned up. He is currently attending college to be a Radiologist as his career of choice.
Nick has held multiple titles in the company including administrative work, warehouse, installation and currently as our solar monitoring tech. He enjoys riding motorcycles, fishing, bowling and challenging himself to complete a Rubix cube in less than 40 seconds!


Diane has worked in Customer Service for multiple years. Her background consists but is not limited to being a foreclosure counselor and assisting in accounting departments. Her career with A-1 Guaranteed began in 2010 and was the first time she had ever worked in this trade. She is bilingual in Spanish and is certified in Foreclosure Counseling and Residential lending.
Diane has 4 children and is a grandmother to 5 grandchildren. She is devoted to her family and their happiness. Diane has been our Install Admin in the past and is currently our Accounts Administrator & runs our Universal Savings Program.


John has been in the HVAC trade for over 28 years! He also has 22 years of Naval Construction. He was working in the trade with the owner Richard when they were younger. Multiple years went by between the two when in May of 2014, he began working for A-1 Guaranteed. He is certified in EPA and has been through various trade schools over the years.
John is currently serving in the Air Force Reserves serving our country. He enjoys working on old cars and trucks. He is a Lead Installer.


Roger is new to the trade and hired straight out of HVAC tech school. He is universally EPA and OSHA certified. He began with the company in June of 2015. Roger has 8 years’ experience as a warehouse & forklift driver.
He has a young son and has entered into this trade to provide a good future for the two of them. He is currently an Installer.


Don had been working/helping his dad for over 30 years. He has had multiple years of working in Commercial and also Residential Installation, beginning his career with A-1 Guaranteed in 2015. He is certified in class 4 Universal duct design. He also has backgrounds in plumbing, electrical, working on ice machines and as a HERS rater.
Don has a son and likes the challenge of making things work. He is a Lead Installer with the company.


Victor started in the HVAC trade over 13 years ago with no formal training, learning on the job. He was looking for a change in careers that would challenge him. A friend introduced him to Heating and Air conditioning repair and as he says, “my career took off from there”. He has experience in both residential and commercial aspects of the trade and began with A-1 Guaranteed in 2005. Prior to this trade, Victor was a Warehouse Manager for 9 years.
Victor is married with 2 children. He enjoys spending time with family and friends. Currently, Victor is a Lead Installer.


Miriam has always been in the construction/service industry not just for HVAC but also windows, siding and roofing. She has experience in Accounts payable and Dispatching. Miriam began her employment with us in May of 2017.
She has been in the Heating and Air Conditioning business since 2011. Currently she is our Service Dispatcher in charge of dispatching and all follow up of multiple technicians. She considers herself a Weekend Explorer, Outdoor Enthusiast and is always planning her next adventure. Her co- explorer is her 5 year old son who enjoys being her co-pilot on her adventures.


David has extensive background in HVAC and has been in the trade since 1992. He began his career with A-1 Guaranteed the first time in 2010. After a few years he moved out of state and has recently returned back to the area re-establishing his employment with us. David is also a sailing instructor out of the Berkeley area. Much of his time is spent plying the waters of San Francisco/San Pablo Bays, their tributaries, and the Gulf of the Farallons in his 29 foot full keel sailboat. He has been married to his lovely wife Mary since 2005.
David has come back again as a Comfort Advisor/Specialist, helping his customers choose the perfect system for their homes resulting in the ultimate comfort.


Erik recently graduated from Tech School and has certifications in EPA 608, 609, 410A Safety Certification and Green Technology Awareness. Prior to switching to the HVAC trade, he worked for many years at a Grocery Distributor, when the company closed down; he decided to learn a new trade which led him to Tech School He began his employment with A-1 Guaranteed in 2017. He helps coach Little League and has 2 kids. Erik is a Maintenance Technician.


Jose recently graduated from High School in Napa. Prior to working at A-1 Guaranteed he worked in the hotel and resort business. He began his employment in the warehouse and has recently been promoted to the Install crew. He is looking forward to learning more about the Heating and Air Industry.


Austin has been involved in the business since he was a baby often showing up in ads promoting A-1 Guaranteed. Many customers have watched him grow from that baby into a young man. He officially began working for A-1 Guaranteed in 2016 but as a child he would apply stickers to brochures and pack promotional bags. Prior to his employment with the company, he worked in the food industry. His first job as an A-1 Guaranteed paid employee was in the warehouse, where he was promoted to the Install crew.


Tiffany has been involved in the solar industry since 2013. Her background is heavily based in Customer Service and Hospitality. She has a BS in Political Science from Santa Clara University.
Tiffany is our Solar Specialist/Home Energy Consultant. She prides herself in making sure her customers are 100% satisfied with their solar project. HVAC is brand new to her and she is excited to further her capabilities as a Home Energy Specialist. She can successfully recommend the perfect amount of solar to suit the homeowner’s energy needs while making sure the home is tightly sealed with efficient HVAC systems. Her goal is to save money for her customers and since HVAC goes hand in hand with solar, she is confident she can help you save on your purchase.

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Awards & Certificates

  • Better Business Bureau Honor Roll Member for 21 Years Running
  • BPI Certified
  • Energy Upgrade Participating Contractor
  • Trane Award for Superior Installation and Service
  • Voted Best Heating/Cooling Company for 12 years by Readers of The Vallejo Times Herald
  • Vallejo Schools V.I.P. Award for Partners in Education
  • Vallejo Little League for Support and Generosity
  • Bay Area Certified Green Business
  • Employee Support of the Guard & Reserve by Office of the Secretary of Defense
  • Energy Efficiency Award by Energy Upgrade California


  • Chambers of Commerce: State of California, City of Vallejo, and City of American Canyon
  • League of California Homeowners
  • Electric & Gas Industries Association
  • Air Conditioning Contractors of America
  • Napa-Solano Builders Exchange
  • Better Business Bureau
  • Safety Services Company
  • NATE Certified
  • EGIA Approved Contractor
  • Diamond Certified
  • A-1 Guaranteed Heating & Air Conditioning
    1768 Broadway St. Vallejo, CA 94589