NFI REVIEW (CODES)

NFI REVIEW (CODES)

1. UL103HT These requirements cover factory-
built chimneys intended for venting
gas, liquid, and solid-fuel fired
residential-type appli- ances and
building heating appliances

2. The maximum chimney offset angle 30 degrees
per- mitted in the United States is

de- grees (from vertical).
1. Type 1. Ember protection
3. What is UL 1618?
2. Type 2 thermal floor protection
(2 types of manufactured pads)

4. Type 1 floor protection Can be used on appliances that do
not re- quire thermal protection

5. Type 2 floor protection · For appliances req. to heave thermal
pro- tection
·Must have an R value of 1.0
·R-value must equal or exceed
minimum R value needed

6. R-Value Measure of heat resistance

7. Gas products standards ANSI (American National Standards
written by
Insti- tute)

8. ANSI Z21.50 This Standard applies to newly
produced vented decorative gas
appliances

9. ANSI z21.8 This standard applies to the installation
of a conversion burner
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, NFI REVIEW (CODES)

10. ANSI Z21.9 Outdoor decorative appliances




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