OUTDOOR DESIGN CONDITIONS GUIDE COVER DISCLAIMER AND LEGAL NOTICE This publication and all earlier working/review drafts of this publication are protected by copyright. No part of this publication or earlier working/review drafts of this case study may be reproduced or stored in a retrieval system or transmitted in any form by any technology without permission from ACCA. Address requests to reproduce, store, or transmit to: Chris Hoelzel at the ACCA offices in Arlington, Virginia. © 2014, Air Conditioning Contractors of America 2800 Shirlington Road Suite 300 Arlington, VA 22206 www.acca.org Disclaimer and Legal Notice Diligence has been exercised in the production of this publication. The content is based on an industry consensus of recognized good practices. The commentary, discussion, and guidance provided by this publication does not constitute a warranty, guarantee, or endorsement of any concept, observation, recommendation, procedure, process, formula, data-set, product, or service. ACCA does not warrant or guarantee that the information contained in this publication is free of errors, omissions, misinterpretations, or that it will not be modified or invalidated by additional scrutiny, analysis, or investigation. The entire risk associated with the use of the information provided by this publication is assumed by the user. INTRODUCTION Page i INTRODUCTION When designing an HVACR system, it is of paramount importance to use the correct outdoor climate data (outdoor design conditions) for the locality in which the building receiving the new system is located. This data is used when calculating the building component heating load and component cooling load, which in turn are used to determine the required cubic feet per minute (CFM) for each room, design the appropriate duct work, and select the optimal equipment for the application. As is evident, not using the relevant outdoor design conditions can cause errors that will propagate throughout the system design process. The results are an uncomfortable indoor environment, energy inefficiency, and avoidable expenses. This guide is a stand-alone version of the Outdoor Design Conditions tables that originally appear in the ACCA Manual J Residential Load Calculation 8th Edition v.2.0. It also contains the relevant references and notes that can be found throughout the Manual J. It is ACCA’s intention that the Outdoor Design Conditions Guide will aide Raters and Code Officials around the country in performing system design evaluations. For ease of use, the table of contents lists the page on which you can find a specific state. Page ii TABLE OF CONTENTS TABLE OF CONTENTS INTRODUCTION ....................................................................................................................................................... i TABLE OF CONTENTS .......................................................................................................................................... ii 1.0 REFERENCES .............................................................................................................................................. 1 2.0 NOTES............................................................................................................................................................ 2 3.0 OUTDOOR DESIGN TABLES .................................................................................................................. 3 ALABAMA................................................................................................................................................. 3 ALASKA..................................................................................................................................................... 3 ARIZONA ................................................................................................................................................... 4 ARKANSAS ............................................................................................................................................... 5 CALIFORNIA ............................................................................................................................................. 5 COLORADO ............................................................................................................................................... 7 CONNECTICUT ......................................................................................................................................... 8 DELAWARE .............................................................................................................................................. 8 DISTRICT OF COLUMBIA....................................................................................................................... 8 FLORIDA ................................................................................................................................................... 8 GEORGIA ................................................................................................................................................... 9 HAWAII .................................................................................................................................................... 10 IDAHO ...................................................................................................................................................... 10 ILLINOIS .................................................................................................................................................. 10 INDIANA .................................................................................................................................................. 11 IOWA ........................................................................................................................................................ 12 KANSAS ................................................................................................................................................... 12 KENTUCKY ............................................................................................................................................. 13 LOUISIANA ............................................................................................................................................. 13 MAINE ...................................................................................................................................................... 14 MARYLAND ............................................................................................................................................ 14 MASSACHUSETTS ................................................................................................................................. 15 MICHIGAN .............................................................................................................................................. 15 MINNESOTA ........................................................................................................................................... 16 MISSISSIPPI ............................................................................................................................................. 17 MISSOURI ................................................................................................................................................ 18 MONTANA .............................................................................................................................................. 18 NEBRASKA ............................................................................................................................................. 19 NEVADA .................................................................................................................................................. 19 NEW HAMPSHIRE .................................................................................................................................. 19 NEW JERSEY .......................................................................................................................................... 20 NEW MEXICO ......................................................................................................................................... 20 NEW YORK ............................................................................................................................................. 20 NORTH CAROLINA ............................................................................................................................... 21 NORTH DAKOTA ................................................................................................................................... 22 OHIO ......................................................................................................................................................... 22 OKLAHOMA ........................................................................................................................................... 23 OREGON .................................................................................................................................................. 23 PENNSYLVANIA .................................................................................................................................... 24 RHODE ISLAND ....................................................................................................................................