UL 791:5ED 2006-11-10

Foreword
Introduction
1 Scope
2 Components
3 Units of measurement
4 Glossary
5 Installation and operating instructions
Construction
6 Assembly
7 Enclosure
8 Internal wiring
9 Wiring methods
10 Field-wiring connections
11 Ash compartment
12 Body
13 Capacity
14 Casing
15 Charging door
16 Combustion chamber
17 Combustion regulation
18 Damper
19 Disposal of combustion products
20 Draft hood
21 Flue collar
22 Grates
23 Insulation, thermal
24 Radiation shields
Electrical components
25 General
26 Electrical enclosures
27 Heating elements
28 General
Gas equipment
29 Burners
30 Primary air control
31 Orifices and orifice fittings
32 Pilots
33 Automatic pilot devices
34 Pilot filters
35 Gas valves
36 Gas supply lines
37 Gas-pressure regulators
Performance
38 General
39 Test installation enclosure, flue pipe, and chimney
40 Instrumentation
41 Initial test conditions
42 Capacity charge - maximum air supply test
43 Capacity charge - normal air supply test
44 Continuous charge test
45 Power input test
46 Dielectric withstand test
47 Insulation resistance test
48 Gas burner test
49 Strength test
Manufacturing and production tests
50 General
Marking
51 General

This revision to UL 791 dated February 25, 2021 includes the addition of requirements for gas-fired incinerating toilets; 4.24A and Section 49A

These requirements apply to direct-fed incinerators, including those of the gas and electric ignition types, designed primarily for use in one-and two-family dwellings for the burning of ordinary combustible waste materials and garbage incidental to domestic occupancy and having a firebox or charging compartment of not over 5 cubic feet capacity.