Mr. Heater MH125FAV Operating Instructions And Owner's Manual page 10

NEVER LEAVE THE HEATER UNATTENDED WHILE BURNING! NEVER LEAVE THE HEATER UNATTENDED WHILE BURNING! NEVER LEAVE THE HEATER UNATTENDED WHILE BURNING!
•­Do­not­use­this­heater­for­heating­human­living­quarters.­
•­Use­of­direct-fired­heaters­in­the­construction­environment­can­result­in­exposure­to­levels­of­CO,­CO2,­and­NO2­con-
sidered­to­be­hazardous­to­health­and­potentially­life­threatening.­
•­Do­not­use­in­unventilated­areas.­
•­Know­the­signs­of­CO­and­CO2­poisoning.­
•­Headaches,­stinging­eyes­
•­Dizziness,­disorientation­
•­Difficulty­breathing,­feels­of­being­suffocated­
•­Proper­ventilation­air­exchange­(OSHA­29­CFR­1926.57)­to­support­combustion­and­maintain­acceptable­air­quality­shall­
be­provided­in­accordance­with­OSHA­29­CFR­Part­1926.154,­ANSI­A10.10­Safety­Requirements­for­Temporary­and­Por-
table­Space­Heating­Devices­and­Equipment­used­in­the­Construction­Industry­or­the­Natural­Gas­and­Propane­Installa-
tion­Codes­CSA­B149.1.­
•­Periodically­monitor­levels­of­CO,­CO2­and­NO2­existing­at­the­construction­site­–­at­the­minimum­at­the­start­of­
the­shift­and­after­4­hours.
•­Provide­ventilation­air­exchange,­either­natural­or­mechanical,­as­required­to­maintain­acceptable­indoor­air­quality.
CO
CO
2
NO
2
(Short­Term­Exposure­Limit­=­15­minutes)
CO
CO
2
NO
2
•­Ensure­that­the­flow­of­combustion­and­ventilation­air­exchange­cannot­become­obstructed.­
•­As­the­building­'tightens­up'­during­the­construction­phases­ventilation­may­need­to­be­increased.
Installation­of­this­appliance­at­altitudes­above­2000­ft­(610­m)­shall­be­in­accordance­with­local­codes,­or­in­the­absence­of­
local­codes,­the­National­Fuel­Gas­Code,­ANSI­Z223.1/NFPA­54,­or­National­Standard­of­Canada,­Natural­Gas­and­Propane­
Installation­Code,­CSA­B149.1
The­heater­has­been­shipped­from­the­factory­set­up­for­operation­on­propane­gas.
Mr. Heater, Inc.| Forced Air Propane Construction Heater
WARNING
Air­Quality­Hazard
USA­8-Hr­Time­weighted­average
(OSHA­29­CFR­1926.55­App­A)
50­ppm
5000­ppm
USA­–­Ceiling­Limit
5­ppm
Canada­8-hr­time­weighted­average
WorkSafe­BC­OHS­Guidelines­Part­5.1
and­Ontario­Workplaces­Reg­833
25­ppm
5000­ppm
3­ppm­(Reg­833)
Canada­STEL­(15­minutes­Reg­833/1­hour­
WSBC)­WorkSafe­BC­OHS­Guidelines­Part­
5.1­and­Ontario­Workplaces­Reg­833
100­ppm
15000­ppm­(WSBC)
30000­ppm­(Reg­833)
1.0­ppm­(WorkSafeBC)
5.0­ppm­(Reg­833)
10
Operating Instructions and Owner's Manual