Verify the Alabama HVAC License
Ask for the contractor’s legal business name and Alabama HVAC license number, then verify the license with the appropriate state board.
LicensedHVAC & Refrigeration
InsuredProfessional Protection
Load CalculationsProper Sizing
Written OptionsNo-Pressure Decisions
Start with Verification
Credentials Every HVAC or Refrigeration Contractor Should Be Able to Prove
Professional appearance and a low price do not replace a verifiable license, insurance, refrigerant certification and written business identity.
Verify Refrigeration Licensing
Commercial refrigeration work may require refrigeration credentials in addition to general HVAC experience.
Confirm Liability Insurance
Request current proof of general liability insurance appropriate for the work being performed.
Ask About Workers’ Compensation
Confirm how employees and subcontractors are covered if someone is injured on the property.
Confirm Bonding When Applicable
Bonding requirements vary by project, contract and jurisdiction. Ask whether a bond applies.
Check EPA Technician Certification
Technicians who handle regulated refrigerants should have the appropriate EPA Section 608 certification.
Confirm Permit Responsibility
The proposal should state who obtains required permits and coordinates inspections.
Verify the Physical Business
Look for a real business name, address, phone number, website and established service history.
Installation Quality
The Brand Cannot Correct Poor Sizing, Airflow or Commissioning
A premium system can perform poorly when it is oversized, mismatched, undercharged, connected to restrictive ducts or installed without proper drainage and control setup.
Compare the contractor’s design and startup process—not only the logo on the cabinet.
Ask this: “What measurements will you take before and after installation to verify performance?”
Quality Installation Includes
- Load-based sizing
- Matched equipment
- Duct and airflow review
- Correct drainage
- Electrical and gas verification
- Refrigerant procedures
- Control setup
- Startup documentation
Correct Sizing
Do Not Accept “Your Old Unit Was Three Tons” as the Entire Sizing Method
The old equipment may have been oversized or undersized, and the building may have changed. Windows, insulation, additions, ductwork and occupancy affect the load.
A qualified contractor should explain whether a residential Manual J, commercial load calculation or other accepted sizing method applies.
Review Load Calculations
Learn why capacity should be based on the property rather than guesswork.
View Load Calculation Services
Compare Written Proposals
A Complete Quote Should Explain What You Are Buying
A total price is not enough. The proposal should identify the equipment, work, materials, exclusions and responsibilities.
Equipment Model Numbers
The proposal should identify indoor and outdoor model numbers or clearly defined equipment families.
Capacity and Efficiency
Tonnage, heating output, SEER2, EER2, HSPF2 or AFUE should be stated where applicable.
Included Materials
Line sets, pads, drains, disconnects, thermostats, filters, duct transitions and accessories should be identified.
Ductwork Scope
Any duct repair, replacement, sealing or exclusion should be written clearly.
Electrical and Gas Work
The proposal should state whether electrical, gas, venting or utility modifications are included.
Removal and Disposal
Old equipment removal, refrigerant recovery and disposal responsibilities should be documented.
Warranty Terms
Parts, labor, registration, extended coverage, exclusions and owner responsibilities should be explained.
Payment Schedule
Deposits, progress payments, financing, final payment and change-order procedures should be stated.
Side-by-Side Comparison
Professional Contractor vs. High-Risk Contractor
Ask Before You Sign
Questions Every Homeowner or Business Owner Should Ask
Are you licensed for this exact type of work?
Ask for the license number and verify the legal business name.
Will you obtain required permits?
The contractor should explain permit and inspection responsibilities.
Will you perform a load calculation?
Ask how capacity will be selected and whether Manual J, Manual N or another accepted method applies.
How will you evaluate the duct system?
Ask about airflow, static pressure, return-air capacity, leakage and duct modifications.
What equipment combinations are being proposed?
Confirm that indoor and outdoor equipment are manufacturer-approved matches.
What is included and excluded?
Ask for a complete written scope, including materials, accessories, electrical, gas and drainage work.
How will the system be commissioned?
Ask which airflow, temperature, refrigerant, combustion, drainage and control checks will be completed.
Who will perform the work?
Clarify whether employees, subcontractors or a combination will be used.
What warranties apply?
Separate manufacturer parts coverage, contractor labor coverage and optional extended plans.
How are change orders handled?
Additional work should require written approval before it is performed.
What happens if the system does not perform?
Ask about callbacks, workmanship concerns and the contractor’s correction process.
Can you provide references or reviews?
Look for consistent recent feedback that describes similar work.
Avoid Expensive Mistakes
HVAC Contractor Red Flags
One concern may deserve clarification. Several concerns together are a reason to stop and choose another contractor.
No License Number
A contractor who will not provide verifiable license information should not be trusted with regulated HVAC or refrigeration work.
Cash-Only Pressure
Large cash payments without a detailed written contract and receipt create unnecessary risk.
Rule-of-Thumb Sizing Only
Replacing equipment solely by square footage or matching the old nameplate can repeat an existing sizing problem.
No Written Scope
A price without equipment, labor, materials, exclusions and warranty details is difficult to compare or enforce.
Unusually Low Bid
A low bid may omit permits, commissioning, matched equipment, accessories, duct corrections or warranty support.
Immediate Replacement Pressure
Major repair or replacement recommendations should be supported by diagnosis, measurements and written options.
Refrigerant Venting or Mixing
Refrigerants must be handled properly. Intentional venting, mixing or unapproved retrofits are serious warning signs.
Borrowed License or Identity
The company performing the work should be the licensed and insured entity named on the contract.
No Startup Documentation
A quality installation should include operation checks rather than simply turning the system on.
Warranty Promises Not in Writing
Verbal promises about lifetime coverage or free repairs are not substitutes for written warranty documents.
Commercial Refrigeration
Choosing a Refrigeration Contractor Requires Specialized Experience
Walk-in coolers, freezers, reach-ins and ice machines require refrigerant, controls, defrost, drainage and product-temperature knowledge.
Emergency Response Capability
Ask how the contractor handles temperature-critical refrigeration failures and after-hours calls.
Product-Temperature Awareness
A refrigeration contractor should understand that box temperature, product temperature and air temperature are not the same.
Defrost and Control Experience
Walk-ins, reach-ins and ice machines require knowledge of defrost, controls, sensors and condensate systems.
Leak Detection and Recovery
The contractor should use proper leak detection, recovery equipment and refrigerant-specific procedures.
Electrical and Control Diagnostics
Commercial refrigeration service requires more than adding refrigerant; controls and electrical loads must be evaluated.
Documentation
Service records should identify pressures, temperatures, refrigerant, parts, diagnosis and recommended follow-up.
Food-Service Scheduling
Ask whether work can be coordinated around operating hours, food safety and customer access.
Preventive Maintenance
Discuss coil cleaning, drain service, condenser condition, door gaskets, controls and temperature verification.
Repair Decisions
Diagnosis Should Come Before Replacement Pressure
A contractor should explain the failed component, supporting measurements, repair options, warranty status and the reason replacement may or may not make sense.
Request Repair or Second Opinion
Installation Decisions
Compare Comfort Options, Not Just Replacement Boxes
A good proposal addresses capacity, efficiency, staging, humidity, noise, controls, ductwork, warranties and total project scope.
Explore HVAC Installation
Parts and Labor Warranties
Do Not Assume a Long Parts Warranty Includes Labor
Ask the contractor to separate manufacturer parts coverage, contractor workmanship coverage and optional extended labor protection.
Confirm registration deadlines, maintenance obligations, exclusions, claim procedures and transferability.
Review HVAC Warranty Information
Understand parts, labor, registration and extended coverage before purchasing.
View Warranty Guide
Hiring Process
Eight Steps from Research to Final Walkthrough
1
Verify Credentials
Check licenses, insurance, certifications, business identity and service history.
2
Request a Site Evaluation
Avoid relying on phone-only replacement prices for complex installations.
3
Define the Problem
Separate comfort, airflow, equipment, duct, control and building-envelope concerns.
4
Require Proper Sizing
Use load calculations and equipment-selection principles instead of guesswork.
5
Compare Written Options
Evaluate equipment, scope, warranties, exclusions and total project value.
6
Confirm Permits and Schedule
Document permit responsibility, project timing, access and utility interruptions.
7
Inspect the Completed Work
Review equipment, workmanship, drains, ducts, wiring, labels and jobsite cleanup.
8
Receive Startup Documentation
Confirm operation, commissioning, thermostat training, registration and warranty records.
Need a Repair?
Get a professional diagnosis and clear repair options before making a major decision.
- Documented diagnosis
- Repair and replacement comparison
- Warranty review
- No-pressure options
FREE Estimate
Planning Replacement?
Compare properly sized options, written scope, warranties and financing.
- Property evaluation
- Load-based sizing
- Multiple comfort options
- Professional commissioning
Protect Existing Equipment
Routine maintenance helps preserve reliability, performance and documentation.
- Seasonal maintenance
- Priority service options
- Repair discounts
- Whole-home membership
Financing
Compare Project Price and Financing Terms Separately
A low monthly payment does not reveal the project’s total cost. Review the cash price, interest rate, fees, term and total repayment.
All financing is subject to credit approval and provider terms.
Independent Verification Resources
Verify Credentials and Technical Practices
Alabama HVAC & Refrigeration Board
Verify licensing →EPA Section 608 Certification
Review certification rules →DOE HVAC Sizing Guidance
Review sizing guidance →EPA Refrigerant Recovery Equipment
Review recovery requirements →TVA EnergyRight Quality Contractor Network
Review program information →
Related Resources
Research Before You Hire
Licensed HVAC and Refrigeration Service Across North Alabama
Contact us to confirm repair, replacement, load-calculation or commercial refrigeration availability for your property.
Somerville, ALDecatur, ALHuntsville, ALMadison, ALAthens, ALHartselle, ALPriceville, ALTrinity, ALTanner, ALHarvest, ALHazel Green, ALEva, AL
Contractor Selection FAQ
Licensing, Quotes, Sizing, Warranties and Refrigeration Questions
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Choose a Contractor Who Will Explain the Work
Request HVAC repair, a second opinion, a load calculation or a FREE qualifying replacement estimate from Advanced Service Company LLC.
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