Project Experience
“Our projects go far beyond adjusting thermostats—they’re about creating environments that inspire living, enhance productivity, and prioritize well-being. Every space is an opportunity to come to life, becoming more comfortable, more sustainable, and more efficient.”
Lufthansa Air-Cooled Chillers and AHU Addition (In Design)
Tulsa, Oklahoma
National Steak and Poultry Master Service Engineering
Owasso, Oklahoma
San Juan Diego Mission Catholic Church (In Design)
Stilwell, Oklahoma
Las Maracas Mexican Restaurant (In Design)
Tulsa, Oklahoma
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Complete or in Construction Projects
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Whirlpool Central Plant Remodel and HVAC Upgrades
Tulsa, Oklahoma
This was DPE’s inaugural project. It involved an extensive $12.5 million expansion and renovation of a central plant for a local manufacturing company. The scope encompassed various upgrades, including the incorporation of 1,300 tons of cooling capacity through two 650-ton centrifugal chillers. Additionally, it entailed the replacement of three existing chilled water pumps with new ones capable of delivering 12,000 gallons per minute (gpm) of chilled water to the facility. A new 1,000-ton fluid cooler, complete with an 850 gpm pump skid, was also installed to remove heat from existing air compressors. Miscellaneous enhancements aimed at improving the water quality of the central plant were also installed including air/dirt separators, a chemical pot feeder, new expansion tanks, and a glycol make-up package for the fluid cooler.
Furthermore, the project involved the installation of five new 50-ton chilled water cooled/steam heated rooftop units, along with associated piping and accessories for chilled water supply/return, steam, and steam condensate return. These rooftop units initially served as a precursor for an additional 15 rooftop units to be installed in a subsequent phase. Notably, significant revisions to central plant piping were necessary, alongside the construction of a new 1,200 square foot building to accommodate the new chillers and pumps. To ensure the project’s success, DPE enlisted the expertise of a local architectural, structural, and civil firm to provide crucial components.
As construction is still ongoing, DPE remains committed to overseeing every aspect of the process. This includes attending OAC meetings, conducting thorough submittal reviews, promptly addressing Requests for Information (RFIs), conducting site visits with punch lists, and attending to any unforeseen issues that may arise, all in the pursuit of ensuring the project’s successful completion.
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Black Wall Street Square
Tulsa, Oklahoma
Black Wall Street Square will feature:
- Cultural and Educational Spaces: Museums and galleries to educate visitors about the history of Black Wall Street and celebrate African American art, culture, and innovation.
- Community Spaces: Areas for community gatherings, events, and performances, fostering a sense of unity and collaboration.
- Business Incubators: Support for local entrepreneurs and small businesses, continuing the legacy of economic empowerment and innovation.
- Memorial Gardens: Tranquil spaces for reflection and remembrance of the past.
This project not only aims to preserve the rich history of the Greenwood District but also to inspire future generations by showcasing the resilience and achievements of its community. Black Wall Street Square will stand as a beacon of progress, education, and community spirit, ensuring that the legacy of Black Wall Street continues to thrive.
For this project, DPE provided full mechanical engineering, plumbing engineering, and fire protection delegated design services for the townhouses in full accordance with the International Residential Code-2018.
Bellevue Health & Rehabilitation
Oklahoma City, Oklahoma
Bellevue Health and Rehabilitation in Oklahoma City is a premier healthcare facility dedicated to providing high-quality, compassionate care to individuals in need of short-term rehabilitation or long-term skilled nursing services. Their mission is to enhance the quality of life for their residents through comprehensive, personalized care plans that cater to their unique needs.
This project involved remodeling two nurse stations, two spa restrooms, and the hallways within the 220,000 square foot facility. Given the I-2 occupancy classification of the facility, DPE worked closely with the Oklahoma State Department of Health (OSDH) to ensure compliance with OAC Title 310, Chapter 675 – Nursing and Specialized Facilities. During the design process, it was determined that two of the existing air handling units, while still operational, had reached the end of their life expectancy and required replacement. DPE coordinated with Subchapter 5 of the aforementioned OSDH Title and specified new air handling units in accordance with these regulations.
DPE provided comprehensive mechanical engineering, plumbing engineering, and fire protection delegated design services for this project.
Additional Projects
Oklahoma
Griffin Media – News on 6 Studio Remodel – Tulsa, Oklahoma
Coweta Public Works Authority – Waste Water Treatment Plant New Laboratory – Coweta, Oklahoma
Cornerstone Church | Rockford HVAC Addition – Tulsa, Oklahoma
Harvard Apartments – Tulsa, Oklahoma
Wings of Freedom Laundromat & Apartments – Tulsa, Oklahoma
HAN Korean BBQ – Tulsa, Oklahoma
DPE was hired by the restaurant owner after the property management company required the submission of engineered drawings. The project involved the design of a new up-flow exhaust system for a Korean BBQ restaurant located in an existing space, featuring an innovative table exhaust system that had not previously been installed in Tulsa. DPE calculated and provided the appropriate make-up air for the space, which was delivered through a fully modulated direct expansion and natural gas heated make-up air unit to serve the dining area. Additionally, the proposed kitchen and rooftop equipment exceeded the capacity of the existing gas meter. DPE coordinated with Oklahoma Natural Gas on behalf of the owner to ensure the service was adjusted to meet the increased natural gas demand. The restaurant is set to become a new highlight in Tulsa’s food scene, with an expected opening in Fall 2024.
Origin Coffee Company – Tulsa, Oklahoma
DPE facilitated obtaining a mechanical permit by coordinating with the City of Tulsa Inspection Service for installation of a new gas-fired coffee bean roaster that was to be installed within the facility. The City of Tulsa inspector required the installation to be approved by a licensed mechanical engineer. DPE provided the necessary engineering services and expertise to ensure the project proceeded smoothly and remained on schedule.
Sooner Wholesale Florist – Tulsa, Oklahoma
The owner of this existing facility hired a local mechanical contractor to add heating, ventilation, and air conditioning to an existing building constructed around 1980. This mechanical contractor approached DPE to provide a heat load calculation and letter, signed by a licensed mechnaical contractor, detailing the BTU’s of cooling and heating required to maintain the owners desired temperature. DPE delivered these services promptly, allowing construction to continue as scheduled. Additionally, DPE verified that the facility could utilize natural ventilation per the requirements of the International Mechanical Code-2018.
Waurika Lake Master Conservatory District (WLMCD) – Duncan, Oklahoma
WLMCD manages and distributes water from Waurika Lake to several communities in Oklahoma. To support this process, there are several buildings housing electrical equipment and gear located throughout the district. DPE was engaged by a local electrical engineer to provide cooling solutions for some of these small electrical buildings, supporting the revitalization of the district’s infrastructure.
2021 South Lewis – Tulsa, Oklahoma
This project involved adding new ADA-compliant restrooms to an existing office building. DPE utilized the existing exhaust system to handle the additional exhaust requirements for the new restrooms. To ensure the existing system had enough capacity, DPE assisted in coordinating an air test of the existing exhaust fan and system, ensuring that the current setup had the necessary capacity to support the new restrooms without compromising performance.
The Arena 918 – Tulsa, Oklahoma
This new construction project involved two air-conditioned NBA-sized gymnasiums, along with support spaces such as concessions, restrooms, offices, a large entry foyer, and storage areas. DPE was hired to provide engineered designs for both the mechanical and plumbing systems. A key challenge in gymnasium design is ensuring that the flooring selected is compatible with the moisture removal capabilities of the system(s) serving the space. DPE engaged in several discussions with the owner to ensure a comprehensive understanding of how the moisture removal capabilities of the mechanical system would influence the performance and longevity of the chosen flooring