Forge door open vs closed how much heat are you really losing

[Alan]

You’re mid-heat, juggling steel and tongs, and debating whether to crack the forge door or keep it shut. Ever wonder how much heat you’re actually losing and whether it’s costing you fuel or forge time?

 

[hammeredbutproud]

Used to wonder if I should peek mid-heat, losing heat, or just guess. Now, I just trust the glow to save coal

 

[Lorian]

Wasted fuel checking colors at first. Now I just feel and remember.
The forge holds heat better than I thought, which saves money.

 

[thedailygrind]

I used to open too soon and lose heat. Now I time it, peek less, and let the steel tell me less fuel wasted, more hammering.