--- title: The Science of Comfort - Price Industries HVAC blog | GRD (2) description: GRD | Price Industries is committed to innovation, science, technology, business integrity, first-class service, and dedication to people. Our dependable quality, reliable delivery, and knowledgeable follow-up service have made Price a market leader in supplying air distribution, critical controls, and noise control products to the non-residential HVAC market. (2) --- ![PriceTraining\_Logo\_RGB-1](https://blog.priceindustries.com/hs-fs/hubfs/PriceTraining_Logo_RGB-1.png?width=303&height=58&name=PriceTraining_Logo_RGB-1.png)   [![Price Industries](https://blog.priceindustries.com/hubfs/Priceindustries-March-2018/Images/Price_Logo_Blue.svg)](https://www.priceindustries.com/) The Science of ComfortTM ## The Science of Comfort Your Premier Source for All Things HVAC ## [SMACNA Highlight: Drop Boxes](https://blog.priceindustries.com/smacna-highlight-drop-boxes) Posted by [Price Industries](https://blog.priceindustries.com/author/price-industries) on October 14, 2025 at 9:00 AM - [Tweet](https://twitter.com/share) [![6-Way Drop Box Diffuser with High-Capacity Drum Louvers](https://blog.priceindustries.com/hubfs/SMACNA%20Drop%20Box%20FI_2.png)](https://blog.priceindustries.com/smacna-highlight-drop-boxes) ## Designed to Simplify Your Install *Price Industries is proud to be a Gold Associate Member of the [Sheet Metal and Air Conditioning Contractors’ National Association (SMACNA)](https://bit.ly/3JwFg2u). In our SMACNA Highlight blog series, we’ll be featuring news, tips and tricks tailored to the skilled contractors who install, coordinate and deliver HVAC systems across North America.* [Read More](https://blog.priceindustries.com/smacna-highlight-drop-boxes) 0 Comments [Click here to read/write comments](https://blog.priceindustries.com/smacna-highlight-drop-boxes#comments-listing) Topics: [GRD](https://blog.priceindustries.com/tag/grd), [Diffusers](https://blog.priceindustries.com/tag/diffusers), [HVAC](https://blog.priceindustries.com/tag/hvac), [Contractors](https://blog.priceindustries.com/tag/contractors) ## [What Is a Filter Frame Grille?](https://blog.priceindustries.com/what-is-a-filter-frame-grille) Posted by [Ryan Compton](https://blog.priceindustries.com/author/ryan-compton) on September 16, 2025 at 9:00 AM - [Tweet](https://twitter.com/share) [![Price Filter Frame Grille](https://blog.priceindustries.com/hubfs/530FF_tbar_layin_w_filter_v210open_FI.png)](https://blog.priceindustries.com/what-is-a-filter-frame-grille) ## Expertly Designed With Simplicity in Mind Filter frame grilles are an elegant solution for providing filtration on the return-air side of your air distribution system. Return grilles supplied with a filter frame make it easy to access filter media from the room side using face-operable latches. [Read More](https://blog.priceindustries.com/what-is-a-filter-frame-grille) 0 Comments [Click here to read/write comments](https://blog.priceindustries.com/what-is-a-filter-frame-grille#comments-listing) Topics: [GRD](https://blog.priceindustries.com/tag/grd), [Grilles](https://blog.priceindustries.com/tag/grilles), [HVAC Fundamentals](https://blog.priceindustries.com/tag/hvac-fundamentals), [HVAC](https://blog.priceindustries.com/tag/hvac), [Engineering](https://blog.priceindustries.com/tag/engineering), [Design Engineering](https://blog.priceindustries.com/tag/design-engineering), [Filtration](https://blog.priceindustries.com/tag/filtration) ## [What Is a Drop Box?](https://blog.priceindustries.com/what-is-a-drop-box) Posted by [Ryan Compton](https://blog.priceindustries.com/author/ryan-compton) on March 18, 2025 at 9:00 AM - [Tweet](https://twitter.com/share) [![Price’s Drop Box with High-Capacity Drum Louvers with four-way airflow pattern](https://blog.priceindustries.com/hubfs/DBH4way_v002retouch_fi.png)](https://blog.priceindustries.com/what-is-a-drop-box) ## A Simple Approach to Air Distribution for Large Spaces In the world of air distribution, a drop box is a plenum with multiple air outlets that is connected directly to an air handling unit (AHU) by a short run of ductwork. A drop box can be an effective way to deliver a substantial volume of conditioned air to large, enclosed spaces. [Read More](https://blog.priceindustries.com/what-is-a-drop-box) 0 Comments [Click here to read/write comments](https://blog.priceindustries.com/what-is-a-drop-box#comments-listing) Topics: [GRD](https://blog.priceindustries.com/tag/grd), [HVAC Fundamentals](https://blog.priceindustries.com/tag/hvac-fundamentals), [HVAC](https://blog.priceindustries.com/tag/hvac), [Engineering](https://blog.priceindustries.com/tag/engineering), [Design Engineering](https://blog.priceindustries.com/tag/design-engineering) ## [How to Improve the Efficiency of Hydronic Reheat Systems](https://blog.priceindustries.com/how-to-improve-the-efficiency-of-hydronic-reheat-systems) Posted by [Mark Mahon](https://blog.priceindustries.com/author/mark-mahon) on February 18, 2025 at 9:00 AM - [Tweet](https://twitter.com/share) [![Hydronic reheat system in a school](https://blog.priceindustries.com/hubfs/Hydronic%20Reheat%20System%20Efficiency.jpg)](https://blog.priceindustries.com/how-to-improve-the-efficiency-of-hydronic-reheat-systems) ## Strategies to Save Energy and Reduce Costs In the HVAC industry, we’re seeing the trend toward decarbonization and electrification affect the built environment more and more every year. It is therefore critical to improve HVAC system performance through better design, selection and control. [Read More](https://blog.priceindustries.com/how-to-improve-the-efficiency-of-hydronic-reheat-systems) 0 Comments [Click here to read/write comments](https://blog.priceindustries.com/how-to-improve-the-efficiency-of-hydronic-reheat-systems#comments-listing) Topics: [GRD](https://blog.priceindustries.com/tag/grd), [Diffusers](https://blog.priceindustries.com/tag/diffusers), [Pressure Drop](https://blog.priceindustries.com/tag/pressure-drop), [Terminals](https://blog.priceindustries.com/tag/terminals), [HVAC Fundamentals](https://blog.priceindustries.com/tag/hvac-fundamentals), [HVAC](https://blog.priceindustries.com/tag/hvac), [Engineering](https://blog.priceindustries.com/tag/engineering), [Design Engineering](https://blog.priceindustries.com/tag/design-engineering) ## [How Does Air Move Through a Room?](https://blog.priceindustries.com/how-does-air-move-through-a-room) Posted by [Ryan Johnson, PE](https://blog.priceindustries.com/author/ryan-johnson) on January 7, 2025 at 9:00 AM - [Tweet](https://twitter.com/share) [![The Flow Visualization Room at Price Research Center North](https://blog.priceindustries.com/hubfs/7J5A6023_crop.jpg)](https://blog.priceindustries.com/how-does-air-move-through-a-room) ## Determining the Right Amount of Airflow for a Space At Price, we pride ourselves on being industry leaders in room air distribution. Our manufactured products are designed around a common goal: to keep the room air clean, dry and comfortable. This is often accomplished by blowing a jet of conditioned, fresh air through a [grille, register or diffuser (GRD)](https://info.priceindustries.com/grd-product-guide-1) throughout a room to properly ventilate it. [Read More](https://blog.priceindustries.com/how-does-air-move-through-a-room) 0 Comments [Click here to read/write comments](https://blog.priceindustries.com/how-does-air-move-through-a-room#comments-listing) Topics: [GRD](https://blog.priceindustries.com/tag/grd), [Diffusers](https://blog.priceindustries.com/tag/diffusers), [Grilles](https://blog.priceindustries.com/tag/grilles), [Displacement](https://blog.priceindustries.com/tag/displacement), [Underfloor](https://blog.priceindustries.com/tag/underfloor), [Thermal Comfort](https://blog.priceindustries.com/tag/thermal-comfort), [HVAC Fundamentals](https://blog.priceindustries.com/tag/hvac-fundamentals), [HVAC](https://blog.priceindustries.com/tag/hvac), [Engineering](https://blog.priceindustries.com/tag/engineering), [Design Engineering](https://blog.priceindustries.com/tag/design-engineering), [Tech Tip](https://blog.priceindustries.com/tag/tech-tip) [Previous](https://blog.priceindustries.com/tag/grd/page/1) [All posts](https://blog.priceindustries.com/all) [Next](https://blog.priceindustries.com/tag/grd/page/3) ## At Price, when we say “the sky is the limit,” we actually mean it. Our customers have come to count on a consistent and ever-increasing stream of new products and enhancements.  Price has a large team of experienced and talented engineers who are consistently working on breakthrough ideas.  We are not afraid to move into whole new product categories if we believe we have a contribution to make. - Research & Innovation - Technical Tours - Training Classes - Targeted Discussions - Mock-up Testing - Custom Solutions & Specials - Custom Finishes - Computational Fluid Dynamics - Virtual Reality ### Subscribe to Email Updates ### Recent Posts ### Posts by Topic - [HVAC (150)](https://blog.priceindustries.com/tag/hvac) - [Engineering (123)](https://blog.priceindustries.com/tag/engineering) - [Design Engineering (107)](https://blog.priceindustries.com/tag/design-engineering) - [HVAC Fundamentals (84)](https://blog.priceindustries.com/tag/hvac-fundamentals) - [Employees (38)](https://blog.priceindustries.com/tag/employees) - [Diffusers (32)](https://blog.priceindustries.com/tag/diffusers) - 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[Contact Product Support](https://www.priceindustries.com/contact/product-support) ### Price Industries - Who We Are The founding principles of Price have never changed – business integrity, first-class service, innovation and a commitment to people. Our dependable quality, reliable delivery, and knowledgeable follow-up service have made Price a market leader in supplying air distribution, critical controls, and noise control products. After more than 60 years, Price remains a privately held family company with a deep heritage and commitment to innovation and service. Our long-standing vision, traditional values, and the Price way of doing business are the cornerstones of our leadership position in the non-residential air distribution industry. - - [Privacy Policy](https://www.priceindustries.com/legal/privacypolicy) - [Engineering E-Update](https://www.priceindustries.com/signup/newsletter) - - [Contact Information](https://www.priceindustries.com/contact/reps-dealers?territory=International) - [Career Opportunities](https://www.priceindustries.com/corporate/careers) - [Our Services](https://www.priceindustries.com/services) ![Price Industries](https://blog.priceindustries.com/hubfs/Priceindustries-March-2018/Images/PriceLogo-footer.png) © 2018 Price Industries. All Rights Reserved. 2975 Shawnee Ridge Court - Suwanee, Georgia 30024 - (770) 623-8050. - **Current Market:** - [Canada](https://www.priceindustries.com/?SwitchMarket=Canada) - [United States](https://www.priceindustries.com/?SwitchMarket=United%20States) - [International](https://www.priceindustries.com/?SwitchMarket=International)