Updates on ANSI/ASHRAE/ASHE Standard , Ventilation of Health Care Facilities

Transcription

1 Updates on ANSI/ASHRAE/ASHE Standard , Ventilation of Health Care Facilities John M. Dombrowski, PE, HFDP, CPMP Mazzetti OSHFM 2017 Annual Conference Columbus, OH October 20,2017

2 History of ASHRAE 170 Roots in ASHRAE Standard 62 and the FGI Guidelines First SPC meeting: 2002 Standard issued in 2008 First ASHRAE Standard co-sponsored by ASHE Standard given continuous maintenance status Standard initially incorporated in 2010 Guidelines for Design and Construction of Health Care Facilities

3 ASHRAE Addendum Adoption Process Continuous Maintenance Addenda suggested by: - SSPC committee members - The public through the Change Proposal Process Public Review Publication

4 CMS Adoption it s complicated? Adopted 2012 NFPA 99 Health Care Facilities Code July NFPA 99 References ASHRAE NFPA 99 was approved by American National Standard on 31 August 2011 ASHRAE 170 Under Continuous Maintenance

5 CMS Adoption it s complicated? ASHRAE 170 Under Continuous Maintenance

6 Language in Codes in Important!

7 How many total air changes per hour are required in a General Exam Room 4 or 6? 4. There are now General and Special Exam Room categories with General requiring only 4 ACHs and Special requiring the previous 6.

8 How far does the exhaust discharge from an AII rooms, bronchoscopy sputum collection exhaust and laboratory work area chemical fume hoods need to be from outdoor air intakes, openable windows/doors, and areas that are normally accessible to the public, 10 or 25? 25. This was in the original FGI Guidelines, but when it was moved to ASHRAE 170, it was only listed as 10

9 Do Rooftop Unit (RTU) gas vents have to meet the discharge/separation requirements of other exhausts? No. It is assumed that the manufacturers of RTUs, in order to meet UL requirements, do the proper research to make sure that the exhaust from the gas vents does not get entrained in the outdoor air intake.

10 This was just an addendum to update all of the reference material dates

11 Is there a means to reduce the air changes required in laboratory work areas below those listed in Table 7.1? Yes. A reduction allowed via ANSI Z9.5 risk assessment or active sensing of contaminants or appropriate surrogates approach

12 How high above the roof must the exhaust discharge from AII rooms, Bronchoscopy sputum collection, Pharmacy Haz. Drug enclosures and lab fume hoods be extended, 6 or 10? 10 Is there a means to reduce the 25 separation requirement for AII exhausts? Yes, if the AHJ allows, a re-entrainment analysis can be performed

13 Are switchable Airborne Infection Isolation/Protective Environment Rooms allowed? No. This is why Table 7.1 changed the pressure requirement for standard Patient Rooms to N/R Are switchable pressure rooms allowed for any other spaces? No. The concern is that staff will not properly switch the controls as required and that the controls may not work properly over time

14 What is the OR primary Diffuser Array? 12 beyond the footprint of the OR table on each side How much of that area can be taken up by non-diffusers? 30% Can the diffuser array extend beyond the 12? Yes, but the 30% rule only applies to the area within the 12 footprint. Any area outside of that cannot be counted toward the 70% that must be diffuser

15 How do the old Class A, B & C Operating Rooms align with the new Operating Room and Procedure Room? New definition of Operating Room is equivalent to Class B and C ORs previously. New definition of Procedure Room is equivalent to Class A ORs previously.

16 What is the new temperature range requirement for Decontamination Rooms? The new temperature requirements for Central Sterile are: Decontamination Room 60 F-73 F Clean Workroom 68 F-73 F Sterile Storage Max 75 F Does this mean that Decontamination rooms have to be designed to be maintained at 60 F? No. It is up to the facility if they want to spend the money to provide the additional cooling to cool the room to 60 F. The room just has to be designed to be maintained within the 60 F-73 F range.

17 Does an Electro-Convulsive Therapy (ECT) Procedure Room require the same Air Changes per hour (3 OA and 15 total) as other Procedure Rooms? No. They only require 2 OA and 4 total

18 Are Adiabatic Humidifiers allowed in healthcare facilities? Some. High pressure water ( psi) atomizing humidifiers are the only type. Not centrifugal atomizers, Ultrasonic or ones that utilize other fluids

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20 Status Out for Public comment Topic Reorganizes 170 to make: Chapter 7 Hospital requirements Chapter 8 Outpatient requirements Chapter 9 Residential requirements Chapters 10 and 11 old chapters 8 and 9

21 Status Out for 2 nd Public comment Giving an alternative compliance path for air change requirements based on risk assessment

22 Status Combined i & l Going to publication Modifying Table 7.1 (and 8.1 & 9.1) to add columns for Unoccupied Turndown and Minimum Filter Efficiencies Would also eliminate Table 6.1

23 Status Going to publication Changes ASHRAE 170 Title, Purpose and Scope Big issue with regard to Comfort and ASHRAE 55

24 2018 Part of 2018 Guidelines Addenda Start Over After Republication January 2018

25 Standard 55 Standard 62.1 Standard 90.1

26 Joint ASHRAE/ASHE/FGI Literature Analysis ASHRAE 170 Research University of Nebraska and AEI

27 Proposed changes to Filter requirements: MERV A Filter locations not dictated Prefilter based on ASHRAE 62 Terminal HEPA filters for OR s Natural Ventilation Position paper Concerns with where, when, control

28 Questions?