# Climate & Energy Design Data

> Climate inputs architects need for envelope and HVAC design — ASHRAE/IECC climate zones, heating and cooling design temperatures, degree-days, and energy-code envelope requirements.

- Canonical: https://harth.build/resources/climate-data/

Every envelope and HVAC decision starts with the climate. Before an architect sets insulation levels, glazing performance, or equipment sizing, they need the climate zone the jurisdiction adopts, the outdoor design temperatures the mechanical engineer sizes to, and the prescriptive envelope targets the energy code enforces.

The pages below explain the ASHRAE 169 / IECC climate zone system, what heating and cooling design temperatures mean, and how prescriptive R-values, U-factors, and SHGC limits tighten as zones get colder. Specific values here are typical and illustrative for orientation only — the energy code edition adopted by the authority having jurisdiction (AHJ) and the official ASHRAE design-condition tables are always authoritative for a real project.

_Prepared by Harth as generated collection navigation. Evidence and review scope are recorded on each linked page._

## United States and general guides

- [ASHRAE / IECC Climate Zones Explained (Zones 1–8, A/B/C)](https://harth.build/resources/climate-data/ashrae-climate-zones-explained.md)
- [Heating & Cooling Design Temperatures (99%, 1% / 0.4%)](https://harth.build/resources/climate-data/heating-and-cooling-design-temperatures.md)
- [IECC Envelope Requirements by Climate Zone](https://harth.build/resources/climate-data/iecc-envelope-requirements-by-climate-zone.md)
- [Climate Design Data Workflow for Albuquerque, NM](https://harth.build/resources/climate-data/climate-design-data-workflow-albuquerque-nm.md)
- [Climate Design Data Workflow for Anchorage, AK](https://harth.build/resources/climate-data/climate-design-data-workflow-anchorage-ak.md)
- [Climate Design Data Workflow for Atlanta, GA](https://harth.build/resources/climate-data/climate-design-data-workflow-atlanta-ga.md)
- [Climate Design Data Workflow for Austin, TX](https://harth.build/resources/climate-data/climate-design-data-workflow-austin-tx.md)
- [Climate Design Data Workflow for Boston, MA](https://harth.build/resources/climate-data/climate-design-data-workflow-boston-ma.md)
- [Climate Design Data Workflow for Chicago, IL](https://harth.build/resources/climate-data/climate-design-data-workflow-chicago-il.md)
- [Climate Design Data Workflow for Dallas, TX](https://harth.build/resources/climate-data/climate-design-data-workflow-dallas-tx.md)
- [Climate Design Data Workflow for Denver, CO](https://harth.build/resources/climate-data/climate-design-data-workflow-denver-co.md)
- [Climate Design Data Workflow for Honolulu, HI](https://harth.build/resources/climate-data/climate-design-data-workflow-honolulu-hi.md)
- [Climate Design Data Workflow for Houston, TX](https://harth.build/resources/climate-data/climate-design-data-workflow-houston-tx.md)
- [Climate Design Data Workflow for Las Vegas, NV](https://harth.build/resources/climate-data/climate-design-data-workflow-las-vegas-nv.md)
- [Climate Design Data Workflow for Los Angeles, CA](https://harth.build/resources/climate-data/climate-design-data-workflow-los-angeles-ca.md)
- [Climate Design Data Workflow for Miami, FL](https://harth.build/resources/climate-data/climate-design-data-workflow-miami-fl.md)
- [Climate Design Data Workflow for Minneapolis, MN](https://harth.build/resources/climate-data/climate-design-data-workflow-minneapolis-mn.md)
- [Climate Design Data Workflow for New York, NY](https://harth.build/resources/climate-data/climate-design-data-workflow-new-york-ny.md)
- [Climate Design Data Workflow for Portland, OR](https://harth.build/resources/climate-data/climate-design-data-workflow-portland-or.md)
- [Climate Design Data Workflow for Salt Lake City, UT](https://harth.build/resources/climate-data/climate-design-data-workflow-salt-lake-city-ut.md)
- [Climate Design Data Workflow for San Diego, CA](https://harth.build/resources/climate-data/climate-design-data-workflow-san-diego-ca.md)
- [Climate Design Data Workflow for San Francisco, CA](https://harth.build/resources/climate-data/climate-design-data-workflow-san-francisco-ca.md)
- [Climate Design Data Workflow for Seattle, WA](https://harth.build/resources/climate-data/climate-design-data-workflow-seattle-wa.md)
- [Climate Design Data Workflow for Washington, DC](https://harth.build/resources/climate-data/climate-design-data-workflow-washington-dc.md)
- [Climate Design Data Workflow for New Orleans, LA](https://harth.build/resources/climate-data/climate-design-data-workflow-new-orleans-la.md)
- [Climate Design Data Workflow for Nashville, TN](https://harth.build/resources/climate-data/climate-design-data-workflow-nashville-tn.md)
- [Climate Design Data Workflow for Tucson, AZ](https://harth.build/resources/climate-data/climate-design-data-workflow-tucson-az.md)
- [Climate Design Data Workflow for Boise, ID](https://harth.build/resources/climate-data/climate-design-data-workflow-boise-id.md)

## By country

- [Climate & Energy Design Data: Australia (40 pages)](https://harth.build/resources/climate-data/australia.md)
- [Climate & Energy Design Data: Canada (36 pages)](https://harth.build/resources/climate-data/canada.md)
- [Climate & Energy Design Data: Hong Kong (5 pages)](https://harth.build/resources/climate-data/hong-kong.md)
- [Climate & Energy Design Data: India (40 pages)](https://harth.build/resources/climate-data/india.md)
- [Climate & Energy Design Data: Ireland (28 pages)](https://harth.build/resources/climate-data/ireland.md)
- [Climate & Energy Design Data: Kenya (33 pages)](https://harth.build/resources/climate-data/kenya.md)
- [Climate & Energy Design Data: Malaysia (27 pages)](https://harth.build/resources/climate-data/malaysia.md)
- [Climate & Energy Design Data: New Zealand (30 pages)](https://harth.build/resources/climate-data/new-zealand.md)
- [Climate & Energy Design Data: Nigeria (44 pages)](https://harth.build/resources/climate-data/nigeria.md)
- [Climate & Energy Design Data: Philippines (25 pages)](https://harth.build/resources/climate-data/philippines.md)
- [Climate & Energy Design Data: South Africa (32 pages)](https://harth.build/resources/climate-data/south-africa.md)
- [Climate & Energy Design Data: United Arab Emirates (18 pages)](https://harth.build/resources/climate-data/united-arab-emirates.md)
- [Climate & Energy Design Data: United Kingdom (41 pages)](https://harth.build/resources/climate-data/united-kingdom.md)

![Climate-data selection and QA diagram: Climate & Energy Design Data](https://efwwel0vyt9vy5so.public.blob.vercel-storage.com/images/climate-data/index/diagram-1344.webp)

*Climate inputs architects need for envelope and HVAC design — ASHRAE/IECC climate zones, heating and cooling design temperatures, degree-days, and energy-cod…*

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