---
kind: "unit"
title: "42"
title_heading: "The Public Health and Welfare"
key: "ch71/schI"
level: "subchapter"
label: "Subchapter I"
heading: "Heating and Cooling"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/42/ch71-schI"
sections_count: 19
---

# Subchapter I — Heating and Cooling

Title 42 — The Public Health and Welfare › Chapter 71 — Solar Energy

## Sections

- [§5501. Congressional findings and declaration of policy](/usc/42/5501.md)
- [§5502. Definitions](/usc/42/5502.md)
- [§5503. Development and demonstration of solar heating systems for use in residential dwellings](/usc/42/5503.md)
- [§5504. Development and demonstration of combined solar heating and cooling systems for use in residential dwellings](/usc/42/5504.md)
- [§5504a. Repealed.](/usc/42/5504a.md)
- [§5505. Omitted](/usc/42/5505.md)
- [§5506. Test procedures and definitive performance criteria for solar heating and combined solar heating and cooling components and systems and suitable dwellings; determination, consultation and publication in Federal Register](/usc/42/5506.md)
- [§5507. Arrangements with Federal agencies for development and demonstration of solar heating and combined heating and cooling systems for commercial buildings](/usc/42/5507.md)
- [§5508. Program of applied research by Secretary of Energy for improvement and development of heating systems for commercial application; transmission of results to Secretary and Administrator](/usc/42/5508.md)
- [§5509. Supervision of systems and programs by Secretary](/usc/42/5509.md)
- [§5510. Dissemination of information to promote practical use of solar heating and cooling technologies](/usc/42/5510.md)
- [§5511. Federally assisted or federally constructed housing](/usc/42/5511.md)
- [§5511a. Solar Assistance Financing Entity](/usc/42/5511a.md)
- [§5512. Small business concerns’ opportunities to participate in programs](/usc/42/5512.md)
- [§5513. Priorities and criteria of demonstration programs](/usc/42/5513.md)
- [§5514. Regulations](/usc/42/5514.md)
- [§5515. Use of publicly assisted housing by Secretary in demonstrations](/usc/42/5515.md)
- [§5516. Transfer of functions](/usc/42/5516.md)
- [§5517. Authorization of appropriations](/usc/42/5517.md)