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Verified Reviews for Heating Oil Service pros in Diamond, MO

*The Angi rating for Heating Oil Service companies in Diamond, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating Oil Service needs.

*The HomeAdvisor rating for Heating Oil Service companies in Diamond, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating Oil Service needs.

Last update on October 21, 2025

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Avatar for A-Z Air & Refrigeration Llc

A-Z Air & Refrigeration Llc

21458 Old Ritchey Rd
No reviews yet

A-Z Air & Refrigeration Llc

21458 Old Ritchey Rd
No reviews yet
11 years of experience

A-Z Air & Refrigeration llc is a veteran owned small business currently applying for service connected status with vetbiz.gov . We are a member owned company launched in 2014 and listed on the BBB of southwest MO. Our CEO is a service connected veteran who served with honor in Operation Enduring Freedom . Our highly skilled and trained team holds multiple licenses including EPA, NCCER , AS Degrees with accredited HVACR schools and many more. We are licensed and Bonded with up to date Letters of good standing with the state of MO and recently launched operations in KS . We service, repair, replace, upgrade and diagnose almost all brands of HVACR for residential and light commercial applications. This includes Boilers, Chillers, and Hydronic systems. We currently have active accounts with many commercial companies. A-Z Air & Refrigeration llc was launched as a veteran service company offering many veteran discounts and billing options. We will extend our coverage areas to meet any veteran needs per our industry. All non veterans continue to receive top quality work at competitive pricing and standard service contract rates. Whether you did or did not serve our country we are the team you want, If you did serve our country we are the team you need.

A-Z Air & Refrigeration llc is a veteran owned small business currently applying for service connected status with vetbiz.gov . We are a member owned company launched in 2014 and listed on the BBB of southwest MO. Our CEO is a service connected veteran who served with honor in Operation Enduring Freedom . Our highly skilled and trained team holds multiple licenses including EPA, NCCER , AS Degrees with accredited HVACR schools and many more. We are licensed and Bonded with up to date Letters of good standing with the state of MO and recently launched operations in KS . We service, repair, replace, upgrade and diagnose almost all brands of HVACR for residential and light commercial applications. This includes Boilers, Chillers, and Hydronic systems. We currently have active accounts with many commercial companies. A-Z Air & Refrigeration llc was launched as a veteran service company offering many veteran discounts and billing options. We will extend our coverage areas to meet any veteran needs per our industry. All non veterans continue to receive top quality work at competitive pricing and standard service contract rates. Whether you did or did not serve our country we are the team you want, If you did serve our country we are the team you need.

Heating Oil questions, answered by experts

Yes, geothermal heat pumps are worth the money. You can save about 70% on heating costs in the winter and around 50% on cooling costs in the summer with a geothermal heat pump compared to a traditional HVAC system. Over time, your savings on monthly utilities will pay for the cost of the geothermal heat pump installation. If you have an incredibly small yard, however, you may not have enough space for this type of system.

NATE-certified technicians may charge slightly higher service fees compared to non-certified technicians. This is because NATE certification signifies a higher level of expertise and professionalism, often leading to more efficient and effective HVAC repairs and installations. While the upfront cost may be marginally higher, NATE-certified technicians can potentially save you money in the long run by reducing energy consumption, preventing frequent breakdowns, and extending the life span of your HVAC system. When looking for a local HVAC company to hire, it never hurts to ask about NATE certifications.

An evaporator or swamp cooler is a common alternative for small spaces. These coolers blow moist air into a space to help cool it down. They are more affordable than misters and use much less water. However, coolers will not have the same cooling effect as misters, cannot help plants survive the heat, and only reach a small area.

There are three main types of heat pumps. An air-source heat pump system is the most common and has two parts—an indoor air handler unit and an outdoor heat pump unit. A ductless heat pump system functions similarly to an air-source heat pump system but doesn’t need ductwork to distribute the air. A geothermal heat pump system pulls heat from the ground to help heat your home.

There are several common types of HVAC systems that you may have, including split systems, hybrid HVAC, duct-free systems, packaged heating and air, geothermal heating, or even portable units for heating or cooling. If you aren’t sure which type is in your home or are looking to install something different, you should consult an HVAC pro to determine which option is right for your heating and cooling needs.

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