A range of logistical and technical variables can influence the success of an RTU replacement project, from scheduling and crane coordination to permitting and commissioning. Tom’s Commercial works with Arlington and Fort Worth facility managers and property owners to plan ahead, avoid delays, reduce disruption and ensure the new system is properly matched to the building.
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Commercial RTU Replacement in DFW
Rooftop HVAC Replacement Projects Built Around Your Building Operations
Call Tom's Commercial, Inc. at (817) 857-7400 today to schedule a commercial HVAC installation in Arlington or any of the surrounding areas.
When RTU Replacement Makes More Sense Than Retrofit
While some RTU issues can be addressed with component-level repairs or retrofits, there are clear points where replacement becomes the more practical option. Common indicators that replacement makes more sense include:
- Units can no longer maintain set temperatures during peak demand
- Increasing frequency of repairs or longer service calls
- Aging systems are nearing the end of their expected service life
- Compatibility issues with newer components or refrigerants
- Ongoing tenant comfort complaints tied to specific zones
Retrofit work may still be appropriate when the system is otherwise in good condition and the issue is limited to controls, minor components or isolated performance problems. In these cases, targeted upgrades can improve performance without the cost of full replacement.
Common retrofit approaches include:
- Installing variable frequency drives (VFDs) to allow fans and pumps to adjust output based on demand
- Updating building controls or automation systems to improve scheduling and system coordination
- Replacing individual components such as motors, compressors or air handlers while keeping the overall system in place
- Adding economizers or ventilation upgrades to improve efficiency and airflow
These types of upgrades can extend system life and improve performance, particularly when the underlying equipment is still structurally sound.
Equipment Selection and System Matching for RTU Replacement
Selecting the right replacement unit involves more than matching the size of the existing HVAC equipment. In many Arlington and Fort Worth commercial buildings, the original system may no longer reflect current usage, occupancy or layout changes.
Key considerations during RTU replacement include:
- Matching unit capacity to actual building load rather than nameplate replacement
- Ensuring compatibility with existing ductwork, curbs and electrical infrastructure, or planning for the added cost and complexity of structural modifications
- Evaluating whether multiple units should be standardized across the building
- Balancing efficiency improvements with project scope and budget
- Identifying any airflow or distribution limitations that could affect performance
In some cases, existing ductwork or zoning limitations will influence how much improvement can be achieved with new equipment alone. These factors are typically evaluated before finalizing equipment selection.
How Commercial RTU Replacement Projects Are Planned
RTU replacement projects are typically structured around site constraints, access and scheduling requirements rather than a standardized HVAC installation process.
Evaluation and Scope
- Inspecting existing equipment condition and performance
- Identifying access points, roof conditions and structural considerations
- Confirming electrical and mechanical requirements
Logistics Planning
- Determining crane requirements and lift strategy
- Identifying staging areas for equipment and crew access
- Coordinating with building management on timing and restrictions
Scheduling
- Planning after-hours or weekend work when required
- Phasing replacements in buildings with multiple units
- Aligning project timing with tenant and operatinal needs
Permits, Inspections and Code Compliance
Commercial RTU replacement projects in the Dallas–Fort Worth metroplex require permits and inspections to ensure compliance with local mechanical and electrical codes. This typically includes:
- Securing permits through the appropriate city or jurisdiction
- Coordinating required inspections during and after installation
- Verifying that equipment installation meets current code requirements
- Addressing any electrical or structural updates tied to the replacement
Permit requirements vary by city across the DFW area, but coordination and scheduling are handled by Tom’s Commercial as part of the overall project.
Startup, Testing and Commissioning
After installation, rooftop units are tested and adjusted to confirm proper operation before the project is completed. This process generally includes:
- Verifying system startup and basic operation
- Checking airflow and overall system performance
- Confirming thermostat and control functionality
- Identifying and correcting any installation-related issues
Commissioning ensures that the new equipment is operating as intended and that any performance issues are addressed before the system is placed into regular use.
Rooftop Unit Replacement FAQs
Do you handle crane coordination or is that the owner’s responsibility?
Crane coordination is typically handled by our team as part of the RTU replacement project. This includes scheduling the crane, planning the lift and coordinating access based on the building layout.
What should I expect on RTU crane day?
Crane day is typically the most visible part of the project but usually lasts only a few hours per unit. The crane is positioned in a designated access area such as a parking lot or adjacent street, and a safety perimeter is established during lifting.
Existing units are removed from the roof, and new units are lifted into place and set on curbs. Access to certain areas may be temporarily restricted during the lift. Weather conditions, particularly wind, can affect scheduling.
How much space is needed for crane access?
Space requirements vary depending on the size of the equipment and the building layout. In most cases, a portion of a parking lot or nearby access point is required to safely position the crane and complete the lift.
A site visit is typically needed to confirm access, clearance and any restrictions.
Can RTU replacement be done after business hours?
Yes. Many commercial RTU replacements are scheduled after hours or on weekends to reduce impact on building operations. This is often the preferred approach in occupied buildings or multi-tenant properties, particularly if it’s not an emergency replacement project.
How long does RTU replacement take per unit?
The crane lift itself is usually completed in a few hours per unit. Total replacement time depends on site conditions, electrical and mechanical connections and the number of units being replaced.
Can multiple rooftop units be replaced in phases?
Yes. In buildings with multiple units, replacements are often phased over time. This allows work to be scheduled around budget cycles, tenant needs or equipment condition.
Do you handle permits and inspections?
Yes. RTU replacement projects require permits and inspections, which are coordinated as part of the project to ensure compliance with local codes.
Will tenants lose HVAC during the replacement?
This depends on how the building is configured. In buildings where each rooftop unit serves a specific space or tenant, that area will typically lose HVAC service during replacement.
In buildings where multiple units share the load, cooling or heating may still operate but at reduced capacity while the unit is offline. Projects are scheduled to minimize impact wherever possible.
What happens if weather delays crane day?
Crane operations may be delayed due to high winds or unsafe conditions. If that occurs, the lift is rescheduled for the next available safe window.
Can existing ductwork be reused?
In many cases, existing ductwork can be reused if it is in good condition and properly sized. However, limitations in duct design or condition may affect system performance and should be evaluated during planning.
How do I know if I should replace all units or just one?
This depends on the age, condition and performance of each unit. If multiple units are nearing the end of their service life or showing similar issues, replacing them together may reduce long-term costs and coordination challenges.
What does commissioning include after installation?
Commissioning typically includes system startup, airflow verification, control checks and confirming that the unit is operating as intended under normal conditions.
How far in advance should RTU replacement be scheduled?
Project lead times vary depending on equipment availability, permitting and scheduling constraints. Planning ahead months in advance allows more flexibility for timing, especially if crane access or after-hours work is required.
Plan Your RTU Replacement in Arlington or Fort Worth With a Clear Scope and Timeline
If you’re planning an RTU replacement, call Tom’s Commercial at (817) 857-7400 to schedule a site visit so we can define scope, evaluate access and develop a clear project timeline. We can provide a detailed proposal or be included in your RFP process.
Call today or contact us online to schedule a commercial HVAC installation in Arlington. We’re available 24/7!
