Coal gas’s flammable constituents include carbon monoxide and hydrogen, te piti o te tuhaa i raro a'e i te faatereraa a te Pŭpŭ no te Tino Ahuru Ma Piti. Taa ê atu i te mǎhu natura, e ua navai noa te mau matini uira no te faatere i te mau matini uira IIBT4, E titau te mǎhu arahu i te faaohiparaa i te IICT4.
No te tahi atu â haapapûraa, conducting gap tests or minimum ignition current experiments is advisable.