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What Are USP 797 and USP 800?

Posted by Price Critical Environments on April 26, 2022 at 11:11 AM

A Look at What’s New in the USP 797/800 Standards for Pharmaceutical Compounding

United States Pharmacopeia (USP) is a nonprofit organization that was founded in the 1820s by a group of physicians and is enforced by the U.S. Food & Drug Administration (FDA). USP sets standards for the identity, strength, quality and purity of medicines.

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Topics: HVAC Fundamentals, HVAC, Engineering, Design Engineering, Critical Environments

What Is a Protective Environment Room?

Posted by Price Critical Environments on December 14, 2021 at 12:21 PM

A protective environment room with bed, machinery and chair

Understanding the ASHRAE 170 Requirements for Protective Environment Rooms

A protective environment room, or PE room, is a type of isolation room that is intended to protect an immunocompromised patient from airborne contamination. PE rooms are designed according to the requirements of ASHRAE Standard 170: Ventilation of Health Care Facilities.

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Topics: HVAC Fundamentals, HVAC, Engineering, Design Engineering, Critical Environments, ASHRAE 170, Filtration

What Is an Airborne Infectious Isolation Room?

Posted by Price Critical Environments on November 30, 2021 at 1:01 PM

Medical staff standing in hospital hallway with room pressure monitor on wall

Understanding the ASHRAE 170 Requirements for Airborne Infectious Isolation Rooms

An airborne infectious isolation room, or AIIR, is a type of isolation room that isolates patients infected with organisms that can spread via small airborne droplets (less than 5 µm diameter). The purpose of an AIIR is to prevent the spread of infectious diseases from an infected patient to others. AIIRs are designed according to the requirements of ASHRAE Standard 170: Ventilation of Health Care Facilities.

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Topics: HVAC Fundamentals, HVAC, Engineering, Design Engineering, Critical Environments, ASHRAE 170, Filtration

How to Apply Fan Filter Units

Posted by Price Critical Environments on June 29, 2021 at 11:59 AM

Application of Fan Filter Units as Part of an HVAC System

Fan filter units can be applied in a variety of ways to best suit your application. This blog post provides an overview of the best practices for designing a system with Fan Filter Units.

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Topics: HVAC Fundamentals, HVAC, Engineering, Design Engineering, Training, Tech Tip, Critical Environments

What is a Fan Filter Unit?

Posted by Price Critical Environments on June 15, 2021 at 10:43 AM

Understanding a Popular Solution for High Volume Filtered Air Needs

A fan filter unit, or FFU, is essentially a filtered laminar flow diffuser with an integrated fan and motor.
The integrated fan and motor provide enough static pressure to overcome the pressure drop of the internally mounted HEPA or ULPA filter.

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Topics: HVAC Fundamentals, HVAC, Engineering, Design Engineering, Training, Tech Tip, Critical Environments, Filtration