HVAC Design Manual - Office of Construction & Facilities ...

1 Facilities Management hvac Design NOVEMBER 1, 2017 Rev. May 1, 2019 Rev. March 1, 2020 Rev. November 1, 2021 Rev. March 1, 2022 hvac Design Manual November 1, 2021 GENERAL i TABLE OF CONTENTS Chapter 1: BASIC REQUIREMENTS GENERAL .. 1-2 ENERGY CONSERVATION .. 1-3 MEASUREMENT AND 1-4 ABBREVIATIONS AND REFERENCES .. 1-4 COMMISSIONING .. 1-4 VA STANDARDS .. 1-4 hvac Design Manual (PG 18-10) AND A/E SUBMISSION REQUIREMENTS (PG 18-15) .. 1-13 VA HOSPITAL BUILDING SYSTEM .. 1-14 APPENDIX 1-A: VA HOSPITAL BUILDING SYSTEM .. 1-15 DESCRIPTION OF MODULES .. 1-15 REFERENCES .. 1-16 BASIC Design OF A SERVICE ZONE.

2 1-16 Chapter 2: hvac Design PARAMETERS AND SELECTION CRITERIA GENERAL .. 2-2 BASIS OF Design .. 2-2 SPECIAL STUDIES .. 2-8 BUILDING THERMAL ENVELOPE (EXISTING Facilities ONLY) .. 2-10 VIBRATION CONTROL .. 2-11 SEISMIC Design REQUIREMENTS .. 2-11 FIRE AND SMOKE PROTECTION .. 2-12 Design CONSIDERATIONS FOR EXISTING BUILDINGS .. 2-13 PROJECT PLANNING .. 2-15 DEMOLITION WORK .. 2-16 LOCATIONS OF OUTDOOR AIR INTAKES AND EXHAUST AIR OUTLETS .. 2-16 Chapter 3: AIRSIDE hvac SYSTEMS AND EQUIPMENT INTRODUCTION .. 3-3 ALL-AIR SYSTEMS .. 3-3 TERMINAL COOLING AND HEATING SYSTEMS .. 3-13 hvac Design Manual November 1, 2021 GENERAL ii HEATING AND VENTILATION UNITS (HVU).

3 3-15 SUPPLY AIR OUTLETS .. 3-16 ENERGY RECOVERY SYSTEMS .. 3-17 Design CRITERIA AIR DISTRIBUTION SYSTEMS .. 3-19 EXHAUST SYSTEMS .. 3-22 LABORATORIES AND ANIMAL Facilities .. 3-24 FUME HOOD EXHAUST 3-26 BIOLOGICAL SAFETY CABINETS (BSC) .. 3-31 BIOLOGICAL SAFETY LEVEL 3 (BSL3) .. 3-33 APPENDIX 3-A: BIO-SAFETY LEVEL 3 (BSL3) Facilities .. 3-36 GENERAL .. 3-36 PRIMARY BARRIERS .. 3-36 SECONDARY BARRIERS .. 3-36 PLUMBING AND FIRE PROTECTION CONSIDERATIONS .. 3-37 Chapter 4: BUILDING COOLING AND HEATING SYSTEM INTRODUCTION .. 4-2 COOLING SYSTEMS CHILLED WATER .. 4-2 COOLING SYSTEMS - DIRECT EXPANSION (DX).

4 4-12 HEATING SYSTEMS .. 4-13 Design CRITERIA PIPING SYSTEMS .. 4-21 APPENDIX 4-A: PROPYLENE GLYCOL WATER SOLUTION .. 4-29 GENERAL .. 4-29 PUMP SELECTION .. 4-31 SAMPLE PUMP SELECTION WITH PROPYLENE GLYCOL SOLUTION .. 4-32 NOTES TO BE ADDED TO EQUIPMENT SCHEDULES .. 4-35 Chapter 5: hvac CONTROL SYSTEMS GENERAL .. 5-2 BASIC Design NEW STANDALONE FACILITY .. 5-4 BACNET CONTROLLER IDENTIFICATION .. 5-5 BASIC Design ALL PROJECTS INTEGRATING TO EXISTING DDC SYSTEMS .. 5-5 SPECIFIC REQUIREMENTS .. 5-6 HUMIDITY SENSORS .. 5-11 hvac Design Manual November 1, 2021 GENERAL iii SYSTEM APPLICATIONS.

5 5-11 SUSTAINABILITY AND MAINTAINABILITY practices .. 5-15 DOCUMENTATION REQUIREMENTS .. 5-16 Chapter 6: APPLICATIONS OVERVIEW .. 6-5 DEDICATED AIR-HANDLING UNITS .. 6-5 COMMON (NON-DEDICATED) AIR-HANDLING UNITS .. 6-6 DESIGNATED EMERGENCY EPIDEMIC AIR HANDLING UNITS .. 6-7 GENERAL NOTES .. 6-8 DEDICATED AHU SYSTEM DATA SHEETS AND ROOM DATA SHEETS .. 6-15 All Chapter 6 System and Room Data in Excel (Section 508 compliant) Chapter 7: CLIMATIC DATA CLIMATIC CONDITIONS .. 7-2 HIGH HUMIDITY LOCATIONS .. 7-19 LOW HUMIDITY LOCATIONS .. 7-20 Chapter 8: ABBREVIATIONS AND REFERENCES ABBREVIATIONS .. 8-2 REFERENCES.

6 8-8 hvac Design Manual November 1, 2021 GENERAL iv FOREWORD VA Program Offices, project teams, designers and constructors, are obligated to our Nation's Veterans and taxpayers to make the most effective and efficient use of resources, by providing a continuum of safe, secure, high quality, high performance, and high value environments of care and service for Veterans. The VA Office of Construction and Facilities Management (CFM) supports the Department's mission through development and application of standards as a basis for disciplined planning, Design , and Construction of VA Facilities . VA Standards are the culmination of a partnership among the Department of Veterans Affairs (VA), the VA Administrations, Program Officials, Clinicians, Industry, Academic and Research Organizations, Expert Consultants, and the Office of Construction and Facilities Management.

7 VA Standards are developed through integration of VA-specific requirements, Federal law and regulation, benchmarking of industry best practice, evidence-based research and Design , and value-based analysis of leading edge innovation. The result is the establishment of best value standards for optimum functionality, safety, operability, performance, and quality throughout the VA environment of care and service. The VA Technical Information Library (TIL) ( ) provides standards for all VA planning, Design , and Construction projects. VA TIL Standards communicate the basis of Design and are required to be utilized by project teams working on new Construction and renovations of existing Facilities .

8 VA Standards will maximize the effectiveness and efficiency of the planning and Design process and facilitate a high level of Design , while controlling Construction , operating, and maintenance costs. For all VA projects, it is required that project teams comply with the following in all phases of project development: 1) All applicable VA Standards published in the VA Technical Information Library (TIL) shall be applied as a basis, foundation, and framework in planning, Design , and Construction . Any substantial variance from Standards shall be considered only as required to accommodate specific site, functional, and operational conditions.

9 Upon consideration of variance CFM shall be consulted, and each Administration will function as Authority Having Jurisdiction for decision. Each substantial variance shall have a basis rationale and be documented in the project record; 2) Clinicians, providers, primary users, and other stakeholders shall be involved in all phases of project development to best adapt Standards for specific functional, operational, and site conditions, and to provide optimum service environments for Veterans. This also includes installations and modifications of systems or technology involving safety, security, functionality, or environmental quality.

10 Stakeholder involvement shall be documented in the project record. VA TIL Standards are not project-specific. It is impossible to foresee all rapidly evolving requirements of VA Facilities and each site or project will have unique requirements or conditions. Site-specific issues must be addressed within the context of these standards and applied to each individual project. Use these Standards does not preclude the need for, nor absolve planners, designers, and constructors of their responsibility to provide complete, hvac Design Manual November 1, 2021 GENERAL v functional, safe, and secure designs suited to the unique requirements of each project, within budget, and on schedule.