Douglas Barnhart, PE

Cooling Tower Startup and Maintenance

Cooling towers are the most energy-efficient design method available to reject heat from a building’s air conditioning system, but they are also the most maintenance-intensive option. Air conditioning is a way of life now; you rarely find commercial buildings without air conditioning in the mid-Atlantic region. We use it for human comfort, to preserve products, … Read more

Compounding Pharmacy Design, Construction, and Operation

Compounding pharmacies require tight temperature, relative humidity, and pressurization control to operate in compliance with established standards. Updates that took effect in 2023 introduced changes that affect how these spaces are designed, operated, monitored, and certified. Balancing and actively controlling the airflow to achieve the correct pressure relationships in compounding pharmacy spaces can be challenging. … Read more

Increase HVAC Efficiency with Underfloor Air Distribution

Traditional air conditioning typically conditions an entire room or space, such as in an office space or classroom. Air is supplied from the ceiling and distributed throughout the space. This is a cost-effective method, but it is not well-suited for some applications due to the limitations in efficiency in cooling the entire space, including areas … Read more

HVAC Made-To-Order

Is your food service facility serving the same old food? If not, the heating, ventilation and air conditioning (HVAC) systems serving the facility need to change with the times as well. With food service moving toward made-to-order service for students, even in cafeteria atmospheres, the HVAC system should and can follow suit. Below are some … Read more

Are You on Schedule? HVAC Scheduling for Commercial Buildings

More specifically is your heating, cooling, and ventilation (HVAC) system on schedule?  Do your restroom room fans run at night when you are not there? Are you heating or cooling the entire building when no one is working? Changing temperature setpoints and scheduling HVAC equipment to turn off when the building is unoccupied is an easy way … Read more

Training Saves The Day!

At the end of most construction projects, there is a warranty period, but not all mechanical failures and problems occur within the warranty period. Sound familiar? One option is to get a service agreement from another company or local contractor; however this can be costly, especially if only minor repairs are required when the building … Read more

Heat Pumps: Ideal for Spring and Fall

Spring is upon us and so is the unpredictable weather; a warm summer-like day next to a frigid, blustery cold day, sound familiar? As we get into spring and into those swing days before air conditioning systems are completely commissioned and operational from the winter shut-down, some systems are caught unprepared for the unseasonable temperatures … Read more