Personally, I don’t like infravision as a demihuman ability, and I haven’t run a game with demihuman infravision (or “darkvision”!) for years. But hey, that’s just me. There is, of course, nothing wrong with running a game using infravision. I’ve run and played in games with infravision and had a blast. However, in the original Dungeon & Dragons three booklets, the classic demihuman choices (dwarves, elves, and halflings) did not have infravision. Men & Magic contains no mention of this ability in the demihuman descriptions. The ability exists, but it is a 3rd-level magic-user spell.
Infravision: This spell allows the recipient to see infra-red light waves, thus enabling him to see in total darkness. Duration: 1 day. Range of infravision: 40-60′.
Dungeon & Dragons, Men & magic Vol. 1