Full HVAC & Duct Upgrade – HVAC Service McKinney, TX 75070

🏠 Location: McKinney, TX 75070
🔧 Issue: Original 2003 R-22 5-ton system couldn’t cool; owner spent ≈ $800 / yr on repairs.

🔍 Diagnostic

• Coil, condenser & furnace all end-of-life.
• Return bottleneck: one 18″ duct (≈ 1,300 CFM) for a 5-ton unit that needs ≈ 2,000 CFM. No plenum → high static pressure, loud vents, long run times.

🛠️ Solution

Installed matched Goodman 14.3 SEER2 coil, furnace & condenser.

Built a return plenum to make system capable with new duct set up.

Added a 14″ return duct (≈ 700 CFM). Return capacity now ≈ 2,000 CFM.

Balanced charge & verified static to factory spec.

🌟 Results

✓ Home cools quickly even on 100 °F days.
✓ Vent noise reduced; shorter cycles lower energy bills.
✓ Ends the yearly $800 repair cycle—long-term peace of mind.



📌 Why Duct Design Matters

Most DFW homes were built with “budget” ductwork—no city rule forces builders to follow Manual D/S sizing, so returns are often undersized. Old units could tolerate the restriction; today’s high-efficiency systems can’t. That’s why your new AC may need extra ducts even if the old one “worked.” At Greentech, we measure airflow on every replacement and fix the ducts first, so your shiny new unit delivers the comfort—and savings—you paid for.

📞 Need a right-sized solution? Greentech Engineering Heating & Air Conditioning serves McKinney & the DFW metro with honest diagnostics and precision installs.
(469) 551-6806 | greentechdfw.com