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From February 2 to 4, the global HVACR Expo (AHR Expo) was held in Las Vegas, USA. Royal Service made an impressive appearance at the event, showcasing cutting-edge technologies and innovative achievements alongside more than 1,800 HVACR companies from around the world. As one of the world’s largest and most comprehensive professional trade shows for HVACR (Heating, Ventilation, Air Conditioning, and Refrigeration), this year’s expo gathered leading industry enterprises and p

ASHRAE JOURNAL We are pleased to announce that Royal Service will be exhibiting at the 2026 AHR Expo in Las Vegas, with this exciting news already highlighted by the industry’s most authoritative publication—ASHRAE JOURNAL In the 2026 AHR Expo Product & Show Guide published by ASHRAE Journal, our exhibitor information and featured products are showcased on Page 35. Why ASHRAE JOURNAL Matters Published by the American Society of Heating, Refrigerating and Air-Conditioning Engi

With growing attention on greener buildings and smarter energy use, the air-conditioning field is placing a strong focus on developing more innovative system solutions. In this article, we take a closer look at a highly efficient Underfloor VAV System and explore how its unique design delivers both significant energy savings and improved indoor comfort. The Underfloor VAV system uses a “supply from below and return from above” airflow strategy. Fresh air is delivered through

In modern architectural design, both the aesthetics and functionality of ceiling air diffusers are equally important. The RS continuous linear VAV diffuser features an integrated, elongated form that removes the visual clutter of traditional segmented installations, resulting in a cleaner and more cohesive ceiling appearance. Flexible Combination with Similar or Dummy Diffusers: Supports seamless connections between linear VAV diffusers and can also be paired with dummy diffu

The proper design and construction of the VAV ductwork system are critical to ensuring the normal operation and control of the VAV system during its later stages 01. Connection Methods of VAV-BOX Branch Ducts and Main Ducts a.The branch-to-main duct connection for VAV-BOX units adopts a lateral tapping method (see Figure 1). This configuration ensures more uniform inlet static pressure across all VAV-BOX terminals, significantly simplifying system commissioning. Figure1 b.The

In the variable air volume air conditioning system, the single duct variable air volume terminal equipment (VAV-BOX) is one of the most common variable air volume terminal devices. Its main function is to automatically adjust the supply air according to the temperature requirements of the room so that the indoor temperature remains within the set range to ensure a constant and comfortable space environment. In the previous chapter, we have gained an in-depth understanding of

The Royal Service Smart Variable Air Volume Diffuser (SVAD) is a low-pressure drop terminal device in variable air volume (VAV) systems. In addition to its fundamental function of space temperature regulation through airflow modulation, this terminal unit can be equipped with optional accessories to achieve extended functionalities. The SVAD offers a range of optional accessories to expand its functionality. Below is a detailed analysis of available accessories, selection cri

The fan-powered variable air volume terminal, also classified as a throttling-type terminal, integrates a fan into the basic single-duct configuration. Based on the distinct arrangement between the fan and the primary air damper, it is categorized into series-type (FPS) and parallel-type (FPP). Series-type The fan and the primary air damper are arranged in series, where the AHU-treated primary air passes through both the primary air damper and the fan. The fan operates contin

The Royal Service Variable Air Volume (VAV) diffuser is an independent temperature control unit that offers advantages such as low pressure drop, optimized airflow distribution, and diverse configurations. It provides an effective solution to uneven heating and cooling issues encountered in HVAC projects. Case Study 1 Project：Office Room Renovation Project Description： The original office space was converted into conference rooms in this retrofit project, utilizing the existi

In the variable air volume air conditioning system, the single duct variable air volume terminal device (VAV-BOX) is one of the most common variable air volume terminal devices. Its main function is to automatically adjust the supply air volume according to the temperature requirements of the room, so that the indoor temperature is kept within the set range to ensure a constant and comfortable space environment. How does it achieve precise air supply? What are its specific st