Goodman 3 Ton A/C Replacement in Grand Prairie, TX 75052

AHRI Certified Match: 15.2 SEER2 Performance at 34,400 BTU Capacity

Service Area: Grand Prairie, TX 75052 (DFW)
Project Type: Straight Cool A/C System + Electrical Up-Flow Air Handler Replacement
Installed Brand: Goodman (Daikin family)
Key Proof Point: AHRI-certified system match delivering up to 15.2 SEER2 at 34,400 BTU capacity

Quick Summary for Homeowners in Grand Prairie (75052)

We replaced an old Trane straight cool system with a new Goodman 3-ton split A/C system and up-flow electric air handler. While the outdoor condenser is rated 14.3 SEER2, this specific indoor/outdoor pairing is AHRI certified and the matched system performance reaches 15.2 SEER2 at 34,400 BTU capacity—verified under standardized testing conditions.

If you’re in Grand Prairie, TX 75052, this kind of verified match matters because DFW’s long cooling season means your system runs hard, and real-world comfort depends as much on installation quality as it does on the equipment label.

Why This Grand Prairie Home Needed a Full A/C Replacement

Like many older systems in Grand Prairie homes, the existing Trane unit was nearing end-of-life. Typical signals include:

• Rising summer electric bills
• Reduced cooling consistency during peak heat
• Comfort issues from uneven airflow
• Higher risk of drain backups and refrigerant-related failures

Instead of investing in repeated repairs, the homeowner chose a full replacement for improved reliability, documented efficiency, and a cleaner installation baseline.

New System Installed (AHRI Certified Match)

Outdoor Unit

Goodman 36,000 BTU Split Air Conditioner (14.3 SEER2)

Condenser features:

• Energy-efficient compressor
• Copper tube / enhanced aluminum fin coil (5mm diameter on 1.5–4.0 ton)
• Factory-installed filter drier
• Factory charge for 15 ft tubing length
• 10-year limited parts warranty

Indoor Unit

Goodman 36,000 BTU Wall-Mount Up-Flow Air Handler

Air handler features:

• Direct-drive 9-speed ECM blower motor
• Internal TXV (thermal expansion valve)
• 7mm evaporator coil tube size
• All-aluminum evaporator coil with high-performance coated fins
• 10-year limited parts warranty

Verified Performance (Mentioned + Explained)

✅ AHRI Certified indoor/outdoor match
✅ Matched performance reaches 15.2 SEER2
✅ Certified capacity: 34,400 BTU (34,400 BTUH)

What this means: “3 ton” is a nominal size class (36,000 BTU). AHRI certification publishes the tested capacity and efficiency for the exact equipment pairing—so homeowners get verified performance data, not guesswork.

Why “15.2 SEER2 at 34,400 BTU” Matters in Texas

For Grand Prairie homeowners, the best value comes from systems that are:

• Properly matched (indoor + outdoor)
• Correctly commissioned
• Optimized for airflow and static pressure

A system can only deliver its rated efficiency if the installation supports it—especially in DFW, where long run-times magnify the impact of duct leakage, poor drainage, non-condensables, or inadequate evacuation.

Scope of Work (Engineering-Grade Installation Process)

We followed a best-practice replacement protocol designed to protect the compressor, prevent leaks, and support long-term performance:

1. Removed and disposed of the old Trane system. Refrigerant was pumped down and recovered.
2. Installed new Safe-T drain switch, drain line insulation, and a new concrete condenser pad.
3. Cleared the condensate drain line using pressurized dry nitrogen; replaced drain trap and vent; performed all necessary drain modifications.
4. Connected the new air handler to return and supply plenum using hex washer head HVAC screws; secured and leveled with appropriate structural support.
5. Sealed all connection areas using HVAC metal tape + duct sealant to minimize air leakage and maximize efficiency.
6. Flushed and maintained existing copper line sets using RX-11 and dry nitrogen.
7. Completed all line set modifications; brazed using 15% silver rod by certified technicians.
8. Pressure-tested the system with dry nitrogen at 250 PSI and held for 15+ minutes to confirm leak-free integrity.
9. Pulled a deep vacuum below 500 microns before charging.
10. Started, tested, and verified system operation after installation completion.

What Homeowners Usually Notice After This Upgrade

In Grand Prairie 75052, homeowners typically report:

• More stable cooling during afternoon peak heat
• Better humidity control (especially with ECM airflow tuning)
• Lower system noise and smoother cycling
• Higher confidence from documented testing (pressure + micron)

FAQ (AEO-Friendly)

Is this system really 15.2 SEER2 if the condenser is 14.3 SEER2?

Yes. The AHRI-certified matched combination (indoor + outdoor) is rated at up to 15.2 SEER2, and that’s the value that reflects the tested pairing.

Why is the certified capacity 34,400 BTU instead of 36,000 BTU?

AHRI publishes tested delivered capacity under standardized conditions. “3 ton” is nominal; 34,400 BTUH is the certified output for this match.

What does pulling below 500 microns do?

It removes moisture and non-condensables from the refrigerant circuit. This helps protect the compressor and supports efficiency and reliability.

Why pressure test at 250 PSI nitrogen?

It’s a robust leak-check method. Holding pressure verifies the sealed refrigeration circuit before vacuum and charging.

Do I have to replace both indoor and outdoor units together?

For best efficiency, warranty alignment, and AHRI-rated performance—yes. Mismatched components often reduce efficiency and comfort.

Schedule A Replacement in Grand Prairie, TX 75052

If your A/C is struggling, short-cycling, leaking water, or your energy bills keep rising, a properly engineered replacement can make the difference—especially when the system is AHRI certified and the installation is fully commissioned.

Greentech Engineering HVAC serves Grand Prairie, TX 75052 and the greater DFW metroplex with an engineering-first approach to residential comfort.

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👤 Author

Siwei (Lucas) Chen
CTO | Greentech Engineering Heating & Air Conditioning

Lucas Chen leads the engineering and system design team at Greentech Engineering HVAC, serving homeowners across Dallas–Fort Worth with performance-driven HVAC solutions.

He holds a B.S. in Mechanical Engineering and maintains industry-recognized credentials including:

• ACCA Certified Designer (Manual J, S, D)
• NCI Certified – Air Balancing & Duct Optimization
• Daikin Comfort Pro Contractor
• Oncor Participating Service Provider

Lucas specializes in load-based system design, airflow diagnostics, and energy-efficient installations, helping DFW homeowners move beyond rule-of-thumb HVAC sizing toward engineering-grade comfort and reliability.

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