---
kind: "section"
citation: "40 C.F.R. § 63.11200"
title: "40"
number: "63.11200"
heading: "What are the subcategories of boilers?"
url: "https://uscodex.org/cfr/40/63.11200"
---

# §63.11200. What are the subcategories of boilers?


The subcategories of boilers, as defined in [§ 63.11237](/cfr/40/63.11237.md) are:

- (a) **Coal.**
- (b) **Biomass.**
- (c) **Oil.**
- (d) **Seasonal boilers.**
- (e) Oil-fired boilers with heat input capacity of equal to or less than 5 million British thermal units (Btu) per hour.
- (f) Boilers with an oxygen trim system that maintains an optimum air-to-fuel ratio that would otherwise be subject to a biennial tune-up.
- (g) **Limited-use boilers.**

## Notes

### Amendments

[78 FR 7506, Feb. 1, 2013]

### Source

Source: 76 FR 15591, Mar. 21, 2011, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 7401 et seq.

### Source

Source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.

### Amendments

[78 FR 7506, Feb. 1, 2013]