10-Ton Daikin 13.4 SEER2 Packaged Gas/Electric RTU Installation in Dallas, TX 75236

Commercial Rooftop HVAC Upgrade for Reliable Cooling and Heating Performance

Greentech Engineering Heating & Air Conditioning recently completed a 10-ton Daikin packaged gas/electric rooftop unit (RTU) installation for a commercial property in Dallas, TX 75236.
This project involved a full rooftop system replacement, including new roof curb, supply and return plenums, and a code-required return air smoke detector, delivering a reliable, energy-efficient solution designed for long-term performance in North Texas conditions.

As a Daikin Comfort Pro Contractor, our team follows manufacturer best practices, local code requirements, and engineering-based installation standards to ensure safety, efficiency, and operational reliability for commercial buildings.

Project Overview: Dallas, TX 75236

• Location: Dallas, Texas 75236
• System Type: Packaged Gas/Electric Rooftop Unit (RTU)
• Capacity: 10 Tons
• Efficiency Rating: 13.4 SEER2
• Application: Commercial building cooling and gas heating
• Installation Type: Full RTU replacement with curb and plenum integration

This system was selected to balance upfront cost, reliability, serviceability, and energy efficiency, making it an appropriate solution for many light-commercial and retail facilities throughout the Dallas–Fort Worth metroplex.

Installed System: Daikin 13.4 SEER2 10-Ton Packaged Gas/Electric Unit

The installed system is a Daikin packaged gas/electric RTU, which integrates cooling, gas heating, and air distribution into a single rooftop cabinet—reducing footprint complexity and simplifying maintenance access.

Standard System Features

• Energy-efficient compressor with internal relief valve
• Multi-speed ECM indoor blower motor for improved airflow control
• Quiet horizontal discharge design
• All-aluminum evaporator coil for corrosion resistance
• Copper tube / aluminum fin condenser coil
• Totally enclosed, permanently lubricated condenser fan motor
• Factory-charged R-410A refrigerant
• AHRI Certified performance
• ETL listed for safety compliance
• 5-year limited factory parts warranty

These features support consistent performance under Texas heat loads while maintaining acceptable sound levels for commercial environments.

Scope of Work Performed

Greentech Engineering HVAC executed a complete turnkey RTU installation, ensuring proper airflow, safety compliance, and mechanical integrity.

Installation Scope Included:

• Removal and disposal of existing rooftop unit
• Installation of new roof curb, properly sealed and flashed
• Fabrication and installation of RTU supply and return air plenums
• Secure placement and leveling of the 10-ton Daikin RTU
• Electrical and gas connections per NEC and local code
• Condensate management and drainage verification
• Installation of RTU return air smoke detector (code-required)
• Full system startup, safety checks, and operational testing

All work was performed in compliance with Dallas commercial mechanical codes and Daikin installation specifications.

Why a Packaged Gas/Electric RTU Is Ideal for Dallas Commercial Buildings

For many commercial properties in Dallas, packaged rooftop units remain one of the most practical HVAC solutions.

Key Advantages:

• Gas heating reliability during winter cold snaps
• Simplified rooftop footprint with fewer indoor mechanical components
• Easier service access for maintenance and repairs
• Proven durability in high-heat environments
• Lower installation complexity compared to split commercial systems

This configuration is especially common for retail spaces, offices, warehouses, churches, and light industrial facilities across North Texas.

Energy Efficiency and SEER2 Compliance

The installed unit meets 13.4 SEER2 efficiency standards, aligning with current DOE requirements for commercial packaged equipment.

While higher-SEER options exist, this system was selected based on:

• Building load requirements
• Operating hours
• Budget considerations
• Long-term serviceability

Proper installation, airflow balancing, and duct integration often have more impact on real-world efficiency than nominal SEER ratings alone—an area where engineering-based contractors make a measurable difference.

Safety and Code Compliance: Return Air Smoke Detector

A critical component of this project was the installation of an RTU return air smoke detector, which is required for many commercial rooftop systems.

This safety device:

• Detects smoke within the return air stream
• Shuts down the RTU to prevent smoke distribution
• Helps protect occupants and property
• Supports fire and mechanical code compliance

Skipping or improperly installing this component is a common violation seen in low-quality commercial installations.

Quality Assurance and System Commissioning

Before project completion, the system underwent:

• Electrical safety verification
• Gas pressure and ignition testing
• Airflow and blower operation confirmation
• Cooling and heating performance validation
• Thermostat and control sequence testing

Only after passing all functional checks was the system released for regular operation.

Why Choose Greentech Engineering for Commercial RTU Installation in Dallas

Greentech Engineering Heating & Air Conditioning approaches commercial HVAC from an engineering and compliance standpoint, not guesswork.

Our commercial clients value:

• Accurate system sizing and application matching
• Manufacturer-aligned installation practices
• Code-compliant safety components
• Clean rooftop workmanship
• Long-term service reliability

We serve businesses throughout Dallas, TX 75236 and surrounding DFW areas, delivering dependable HVAC solutions for commercial properties and contact us.

Frequently Asked Questions (Q&A)

How long does a 10-ton rooftop unit typically last?

With proper installation and routine maintenance, a commercial RTU can last 15–20 years in North Texas conditions.

Is 13.4 SEER2 efficient enough for Dallas?

Yes. When properly installed and maintained, 13.4 SEER2 systems provide reliable efficiency for many commercial buildings while balancing cost and performance.

Why is a return air smoke detector required?

It is required by mechanical and fire codes to prevent smoke from being circulated throughout the building during a fire event.

Can this system be upgraded with controls or zoning?

Depending on the building layout, additional controls or economizers may be added to enhance performance and energy management.

Do packaged RTUs cost less to maintain than split systems?

In many cases, yes. RTUs consolidate components into one accessible rooftop cabinet, simplifying service and reducing labor time.

Author & Technical Review

Siwei (Lucas) Chen
CTO | Greentech Engineering Heating & Air Conditioning
B.S. Mechanical Engineering – Virginia Tech
ACCA Certified (Manual J, S, D)
NCI Certified – Air Balancing & Duct Optimization
Daikin Comfort Pro Contractor
10+ Years HVAC Engineering Experience in Dallas–Fort Worth

This article was reviewed and approved by Lucas Chen to ensure technical accuracy, code compliance, and alignment with commercial HVAC best practices.

Learn more about ACCA.

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