Wood NFI || QUESTIONS WITH 100% CORRECT
SOLUTIONS!!
In the 80's particulate emissions for affected appliances were required to be limited to: correct
answers 4.1 grams/ hr(catalytic) & 7.5 grams/hr (noncatalytic)
The national regulations did not apply to appliances with: correct answers - burn rates grater
5kg/hr (11lbs of wood)
- air-to flue ratio > 35 to 1
- firebox > 20 cubic feet
- weight > 800kg or 1760lbs
-coal
-open wood burning
- solid fuel furnaces & boilers
- large industrial and commercial wood fired appliances
Tests showed that these regulations from the 80's showed that correct answers Emissions
from certified appliances were 6kg/hr a reduction of 85%
May 2015 revised EPA regulations step 1 correct answers - wood, pellet stoves = 4.5gram per
hour limit
- Hydronic heaters have a 0.32 lbs per million BTU limit
- Forced air furnaces 0.93lbs per hour limit
May 15 2020 regulations for wood and pellet stoves correct answers - 2 grams per/hr crib
wood
- 2.5 grams per/hr cordwood
Stages of solid fuel combustion correct answers 1. Moisture Evaporation > 212F
2. Release of combustible gases > 500F
3. Ignition and combustion of vapors and gases 540-1,225F
4. Char burning > 900F
How much water is produced for each pound of wood burned. correct answers 1/2 lb
At 100% combustion efficiency what byproducts would be produced correct answers - Water
vapor
- carbon dioxide
- non combustible ashes
4 factors that promote combustion efficiency correct answers - fuel
- temperature
- turbulence
- time
Chimney connector reduced clearances with wall and ceiling protection:
3 1/2 " thick masonry wall without ventilated airspace:
Max clearance reduction Wall & Ceiling
, Min allowed clearance Wall & Ceiling correct answers Max Wall & Ceiling = 33% / —. Min
Allowed clearance = 12" / —
Chimney connector reduced clearances with wall and ceiling protection:
24 gauge sheet metal over 1" glass fiber or mineral batts reinforced with wire, or equivalent
on rear face, with at least 1" ventilated airspace
Max clearance reduction Wall & Ceiling
Min allowed clearance Wall & Ceiling correct answers Max Wall & Ceiling = 66% / 50%
Min allowed = 6"/9"
Chimney connector reduced clearances with wall and ceiling protection:
3 1/2 " thick masonry wall with ventilated airspace:
Max clearance reduction Wall & Ceiling
Min allowed clearance Wall & Ceiling correct answers Max Wall & Ceiling = 66% / — Min
allowed = 6"/ —
Chimney connector reduced clearances with wall and ceiling protection:
1/2" thick noncombustible insulation board over 1" glass fiber or mineral wool batts without
ventilated airspace.
Max clearance reduction Wall & Ceiling
Min allowed clearance Wall & Ceiling correct answers Max Wall & Ceiling = 50% / 33%.
Min allowed = 9" / 12"
Chimney connector reduced clearances with wall and ceiling protection:
24 gauge sheet metal with at least 1" of ventilated airspace
Max clearance reduction Wall & Ceiling
Min allowed clearance Wall & Ceiling correct answers Max Wall & Ceiling = 66% / 50%
Min allowed = 6"/ 9"
Chimney connector reduced clearances with wall and ceiling protection:
1/2" thick noncombustible insulation board with at least 1" ventilated airspace.
Max clearance reduction Wall & Ceiling
Min allowed clearance Wall & Ceiling correct answers Max Wall & Ceiling = 66% / 50%
Min allowed = 6"/ 9"
For a fireplace with an opening < 6'sq the hearth-extension must extend a minimum of
________ " to each side and __________" to the front of the opening correct answers
For a fireplace with an opening > 6'sq the hearth-extension must extend a minimum of
________ " to each side and __________" to the front of the opening correct answers
Maximum allowable clearance reduction from appliances (listed & unlisted)
3 1/2" masonry wall no ventilation, as wall protector / as ceiling protector correct answers 33
1/3% / ————
Maximum allowable clearance reduction from appliances (listed & unlisted)
3 1/2" masonry wall spaced out 1" as wall protector / as ceiling protector correct answers 66
2/3% / ————
Maximum allowable clearance reduction from appliances (listed & unlisted)
SOLUTIONS!!
In the 80's particulate emissions for affected appliances were required to be limited to: correct
answers 4.1 grams/ hr(catalytic) & 7.5 grams/hr (noncatalytic)
The national regulations did not apply to appliances with: correct answers - burn rates grater
5kg/hr (11lbs of wood)
- air-to flue ratio > 35 to 1
- firebox > 20 cubic feet
- weight > 800kg or 1760lbs
-coal
-open wood burning
- solid fuel furnaces & boilers
- large industrial and commercial wood fired appliances
Tests showed that these regulations from the 80's showed that correct answers Emissions
from certified appliances were 6kg/hr a reduction of 85%
May 2015 revised EPA regulations step 1 correct answers - wood, pellet stoves = 4.5gram per
hour limit
- Hydronic heaters have a 0.32 lbs per million BTU limit
- Forced air furnaces 0.93lbs per hour limit
May 15 2020 regulations for wood and pellet stoves correct answers - 2 grams per/hr crib
wood
- 2.5 grams per/hr cordwood
Stages of solid fuel combustion correct answers 1. Moisture Evaporation > 212F
2. Release of combustible gases > 500F
3. Ignition and combustion of vapors and gases 540-1,225F
4. Char burning > 900F
How much water is produced for each pound of wood burned. correct answers 1/2 lb
At 100% combustion efficiency what byproducts would be produced correct answers - Water
vapor
- carbon dioxide
- non combustible ashes
4 factors that promote combustion efficiency correct answers - fuel
- temperature
- turbulence
- time
Chimney connector reduced clearances with wall and ceiling protection:
3 1/2 " thick masonry wall without ventilated airspace:
Max clearance reduction Wall & Ceiling
, Min allowed clearance Wall & Ceiling correct answers Max Wall & Ceiling = 33% / —. Min
Allowed clearance = 12" / —
Chimney connector reduced clearances with wall and ceiling protection:
24 gauge sheet metal over 1" glass fiber or mineral batts reinforced with wire, or equivalent
on rear face, with at least 1" ventilated airspace
Max clearance reduction Wall & Ceiling
Min allowed clearance Wall & Ceiling correct answers Max Wall & Ceiling = 66% / 50%
Min allowed = 6"/9"
Chimney connector reduced clearances with wall and ceiling protection:
3 1/2 " thick masonry wall with ventilated airspace:
Max clearance reduction Wall & Ceiling
Min allowed clearance Wall & Ceiling correct answers Max Wall & Ceiling = 66% / — Min
allowed = 6"/ —
Chimney connector reduced clearances with wall and ceiling protection:
1/2" thick noncombustible insulation board over 1" glass fiber or mineral wool batts without
ventilated airspace.
Max clearance reduction Wall & Ceiling
Min allowed clearance Wall & Ceiling correct answers Max Wall & Ceiling = 50% / 33%.
Min allowed = 9" / 12"
Chimney connector reduced clearances with wall and ceiling protection:
24 gauge sheet metal with at least 1" of ventilated airspace
Max clearance reduction Wall & Ceiling
Min allowed clearance Wall & Ceiling correct answers Max Wall & Ceiling = 66% / 50%
Min allowed = 6"/ 9"
Chimney connector reduced clearances with wall and ceiling protection:
1/2" thick noncombustible insulation board with at least 1" ventilated airspace.
Max clearance reduction Wall & Ceiling
Min allowed clearance Wall & Ceiling correct answers Max Wall & Ceiling = 66% / 50%
Min allowed = 6"/ 9"
For a fireplace with an opening < 6'sq the hearth-extension must extend a minimum of
________ " to each side and __________" to the front of the opening correct answers
For a fireplace with an opening > 6'sq the hearth-extension must extend a minimum of
________ " to each side and __________" to the front of the opening correct answers
Maximum allowable clearance reduction from appliances (listed & unlisted)
3 1/2" masonry wall no ventilation, as wall protector / as ceiling protector correct answers 33
1/3% / ————
Maximum allowable clearance reduction from appliances (listed & unlisted)
3 1/2" masonry wall spaced out 1" as wall protector / as ceiling protector correct answers 66
2/3% / ————
Maximum allowable clearance reduction from appliances (listed & unlisted)
