Key Highlights● Industry and legislators are continuing to strive to increase the awareness of IAQ as a vital public health issue, with research showing significant societal benefits from healthier buildings;● Indoor environments are often more polluted than outdoor air, affecting millions of Americans, especially those with allergies and asthma;● Existing standards and solutions, such as ASHRAE guidelines, can improve IAQ effectively but require broader adoption and public support;● Facility managers and policymakers play crucial roles in maintaining healthy indoor environments throug...

The Smart Variable Air Diffuser (SVAD) has received another significant upgrade. Evolving from Version 2.2 to Version 3.3.3, this release introduces significant software enhancements along with expanded hardware capabilities.New features include infrared remote control, dual-band 5G Wi-Fi connectivity, Window Switch energy-saving integration, and flexible property management control modes. Together, these enhancements further improve the intelligence, energy efficiency, and security of building automation systems, providing smarter and more reliable airflow control for modern buildings.Control...

With hope and determination, Royal Service Air Conditioning begins a new journey. Together, we aim for a year of achievement and success.Opening Ceremony – Drums of ProgressOn February 26, 2026, President Ken Yu led all staff at our Guangzhou HQ to kick off the Year of the Horse, with drums and celebration marking a fresh start.Prayers for ProsperityTraditional offerings, including a roasted pig, symbolized health, energy, and good fortune for both our team and the company. Employees offered incense and toasts, sending their wishes for a successful year.Lion Dance – Bringing Good LuckThe �...

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 professional attendees from across the globe, attracting over 50,000 visitors. This clearly demonstrates its influence...

ASHRAE JOURNALWe 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 JOURNALIn 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 MattersPublished by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), ASHRAE Journal is one of the most influential technical and trend-setting publications in the global HVA...

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 the underfloor plenum directly into the occupied zone, and as the warm air naturally rises, it returns through the cei...

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 diffusers to accommodate various length requirements. The joint structure is clean and straightforward, ensuring both installat...

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 stages01. Connection Methods of VAV-BOX Branch Ducts and Main Ductsa.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.Figure1b.The branch duct interface shall have a 45° transition angle or rounded edge. The branch duct must not protrude into the main d...

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 measurement principles, common accessories and applications of single -duct variable air volume terminals. In this cha...

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 criteria, and their added functionalities:1.Electric Heater ElementElectric Heater Element Control and FunctionsIt use PTC t...