After carefully evaluating the criteria, Sunderland and Willis designed a flexible and efficient solution that would address the requirements of the restaurant, tackle challenges, and offer enhanced occupant comfort.
The ability to integrate the LG Split Compact DOAS and LG Multi V™ 5 VRF products was a key benefit for Gilpatrick. The Split Compact DOAS is equipped with a factory-embedded Heat Recovery Unit, which reduces installation time. This built-in feature eliminates the need for a separately purchased Heat Recovery Unit to incorporate Hot-Gas Reheat for high sensible load and hot weather applications. What’s more, LG’s Split Rooftop DOAS units provide 100 percent outdoor air in heating, cooling, and dehumidification modes. Working with LG Multi V VRF equipment, the LG Split Rooftop DOAS unit complements the LG VRF well and conditions fresh outdoor air indoors, without sacrificing energy efficiency.
“The products we specified for this project fit the owner’s needs in terms of placement flexibility and equipment size,” said Sunderland. “Because of the shared roof space, we were limited in how much of the area we could utilize. One of the advantages of the Split Rooftop DOAS and VRF system is the link between indoor and outdoor components. And the ability to select system sizes that met aesthetic needs and piping lengths was critical.”
The team used LG’s Mid-Static Ducted M3 Chassis for air handling to address the restaurant’s high, exposed ceiling. The Mid-Static Ducted M3 Chassis are installed in the ceiling and operate quietly, which is vital in a restaurant setting. In addition, the LG Split Compact DOAS eliminated the need for extensive ductwork running throughout the space. Conventional HVAC systems with mixed air require ductwork to return to the rooftop unit. By decoupling the ventilation load utilizing LG’s Compact DOAS, the restaurant was able to eliminate return air ductwork back to the unit. Additionally, with the indoor units and the Split Compact DOAS the restaurant was able to distribute air evenly and by zone, resulting in a much shorter supply and return ducting per indoor unit.
Keeping electricity costs down was paramount to Gilpatrick. He noted, “I was a bit worried my electricity bill was going to be high, but this is not your 1980s HVAC system. It is very efficient.”
The LG integrated controls also helped Gilpatrick address the restaurant’s electricity costs. The LG AC Smart 5 control solution allows owners to access the units and incorporate the interlock function— a utility that increases energy-saving opportunities by providing more control and visibility into equipment settings, like indoor and outdoor temperature/humidity, and operating status.
Gilpatrick also liked the MERV 8 filters included as standard with LG’s Split Compact DOAS as they help filter particulates and provide the ability to upgrade to 2" MERV 13 filters if or when needed.