I have reddy pro 100 lp gas heater when i run it within afew minuets my eyes nose and throat burn. ia'm using a 20#cylinder the flame is pretty much blue

More information. I measured the carbon monoxide output at 97 ppm about 8 feet in front of the output after allowing the carbon monoxide detector to sniff a little bit longer. The unit was running on its low setting at the time. I removed the main burner (a bit of work) and found some plugged holes that I cleaned with a needle file. Reassembled and the problem was better - could see a few whisps of yellow in the flame versus a fluttering, small, blue flame. The unit was running cooler than it should have so the reduced propane with a constant fan was still resulting in uncombusted propane. I reduced the air flow by blocking the intake a little and the carbon monoxide went to zero per the detector. I then tested the unit on high (100,000 btu setting) with full air flow and the CO level went to zero and no eye burning. A large blue flame was observed without fluttering (going out for very brief periods of time). After several hours of running the detector never registered above zero. Looks like I have a one setting (100k btu) unit now. More information. I measured the carbon monoxide output at 97 ppm about 8 feet in front of the output after allowing the carbon monoxide detector to sniff a little bit longer. The unit was running on its low setting at the time. I removed the main burner (a bit of work) and found some plugged holes that I cleaned with a needle file. Reassembled and the problem was better - could see a few whisps of yellow in the flame versus a fluttering, small, blue flame. The unit was running cooler than it should have so the reduced propane with a constant fan was still resulting in uncombusted propane. I reduced the air flow by blocking the intake a little and the carbon monoxide went to zero per the detector. I then tested the unit on high (100,000 btu setting) with full air flow and the CO level went to zero and no eye burning. A large blue flame was observed without fluttering (going out for very brief periods of time). After several hours of running the detector never registered above zero. Looks like I have a one setting (100k btu) unit now.

mine does the same thing. im trying to find out the answer as well. It isnt because you're in a closed room unless its small. Mine used to work fine but over 2 weeeks progressivly got worse. I was using twice the lp gas and my eyes would burn after a couple of minutes. Also the flame wasn't nearly as hot as it was before. And this was in a 2500 sq ft building. so its not the room - its the heater. if i can figure it out i will post back mine does the same thing. im trying to find out the answer as well. It isnt because you're in a closed room unless its small. Mine used to work fine but over 2 weeeks progressivly got worse. I was using twice the lp gas and my eyes would burn after a couple of minutes. Also the flame wasn't nearly as hot as it was before. And this was in a 2500 sq ft building. so its not the room - its the heater. if i can figure it out i will post back