Editing Heater

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{{infobox main|building|
| name = Heater
| image = Heater.png
| description = A device that converts electricity into heat. It can automatically turn itself on or off to reach a specific target temperature.
| type = Building
| type2 = Temperature
| placeable = true
| path cost = 30
| passability = pass through only
| blockswind = true
| cover = 0.4
| minifiable = true
| size = 1 ˣ 1
| mass base = 6
| flammability = 0.5
| hp = 100
| sell price multiplier = 0.7
| heatpersecond = 21
| power = -175
| glowradius = 3
| glowcolor = (255, 150, 100)
| terrain affordance = light
| research = Electricity
| thingCategories = BuildingsTemperature
| skill 1 = Construction
| skill 1 level = 5
| work to make = 1000
| resource 1 = Steel
| resource 1 amount = 50
| resource 2 = Component
| resource 2 amount = 1
}}
{{Info|The '''heater''' is a device that can be used to raise the [[temperature]] in a room.}}

==Acquisition==
Constructing a heater requires [[Research#Electricity|Electricity]] to be researched, which [[Scenario_system#New_Tribe_vs_New_Arrivals|New Arrivals]] start with. It requires {{Required Resources}} and is constructed in {{Ticks|{{P|Work To Make}}}}.

==Summary==
Heaters are placed on the floor. Unlike most objects, they can't be rotated, but can be uninstalled. A [[power]]ed heater will warm up an enclosed room up to the target temperature, ignorant of placement. A heater in the corner of the room is as effective as a heater placed in the center. The heat naturally spreads throughout rooms, sped up by open [[door]]s or [[vent]]s. One heater can only warm so much, and factors like room size may make the target unreachable - see [[Temperature]] for more details.

Heaters have two states of power consumption: low and high. 
*A heater that is actively heating consumes 175W (high power).
*If the target temperature is reached, a heater consumes 17 W (low power).
As heat constantly spreads to colder surroundings, heaters often remain at high power. If you have multiple heaters in a room, you can exploit this by having each one be 1 degree higher than the last - one will actively heat the room, while the others will be in low power state.

Heaters can theoretically warm up to 1800 degrees, total - 1 tile by 1800 degrees, 50 tiles by 36 degrees - but this is before considering heat leakage. Simple testing reveals that with an exterior temperature of {{Temperature|-17}}, a single heater with a target temperature of about {{Temperature|20}} can maintain a room with a 9x9 exterior.  A single heater with a target temperature of {{Temperature|10}} can maintain a room with an 11x11 exterior.

In addition to providing heat, the heater will illuminate each tile surrounding it with ~50% light level (Lit), dropping to <10% light level (Dark) at two tiles.

==Analysis==
Heaters are very helpful in cold biomes, and useful in temperate biomes during winter or a [[cold snap]]. If a pawn is too far below their [[Minimum Comfortable Temperature]], they are vulnerable to the potentially lethal [[Injury#Hypothermia|Hypothermia]] and [[Injury#Frostbite|Frostbite]], and receive the [[Mood#Cold|''Cold'']] negative [[mood]]let. Warm [[clothing]] like [[parka]]s instead increase the comfortable temperature range, but clothes must be fitted for every pawn. A colonist sleeping under {{Temperature|16}} gives them the -4 [[Mood#Slept_in_the_cold|''Slept in the cold'']] moodlet, regardless of warm clothing.

Heating is necessary to grow [[crop]]s outside of their growing season. As heaters require an enclosed and [[roof]]ed room to function, a [[sun lamp]] must be used to provide light. This is the only way to grow crops in extreme [[biome]]s like an ''ice sheet''. [[Hydroponics]], combined with a heater and sun lamp, may be used to grow crops where there is no soil.

If resources and/or electricity are unavailable, a [[campfire]] may be used instead. They are much less wood efficient than multiple heaters and a [[wood-fired generator]], and their temperature can't be controlled, so pawns may instead be disgruntled by the heat.

== Version history ==
*[[Version/0.8.657|0.8.657]] - Added

{{nav|temperature}}
[[Category:Temperature]]