Hemogen amplifier

The hemogen amplifier is a deathrest building added by the Biotech DLC that allows Hemogenic deathresters to receive more hemogen from all sources.

Acquisition

Hemogen amplifiers can be constructed once the Deathrest research project has been completed. Each requires 200 Steel, 4 Components, 5 Hemogen packs, 5,000 ticks (1.39 mins) of work, and a Construction skill of 4.

Summary

Active hemogen amplifiers require a pawn capable of deathrest, like a Sanguophage, and must be connected to a deathrest casket. Each hemogen amplifier consumes 100W of power and 0.5 hemogen pack per day as long a pawn is deathresting in an attached casket. It can hold up to 5 packs at a time, for a maximum run time of 10 days, and is constructed fully fueled. The amplifier will be automatically refueled by a haulers so long as auto-refueling is enabled.

The hemogen amplifier increases Hemogen gain by +25% from any source, assuming deathrest isn't interrupted. This reduces the need to drink blood as frequently.

Like other deathrest buildings, an amplifier permanently binds to a pawn once used, with no penalty for deconstruction. Deathresting pawns have their own separate limit to the buildings they can connect to, which can be increased with a deathrest capacity serum.

Analysis

Hemogen amplifiers increase the hemogen a pawn gain, but you can also increase hemogen gain by obtaining more colonists or prisoners. More prisoners means more hemogen you can get, and each prisoner only really comes at the cost of food. Each prisoner gives 14.8 Hemogen per day (1.35 hemogen packs per day), and they don't cost much food. So if you aren't in an inhospitable biome, keeping prisoners is simpler and cheaper than the steel and components used to make a hemogen amplifier.

Furthermore, using an amplifier means not using a glucosoid pump or deathrest accelerator until a pawn has enough building capacity, which is limited for most stages of the game. The pump/accelerator should be built first, as they offer stronger and less replaceable benefits.

However, amplifiers do have a niche. They are one of two deathrest buildings that can be used without a maximum. Once you are using the maximum amount of glucosoid pumps, deathrest accelerators, and/or psychofluid pumps, you might as well build hemogen amplifiers. They reduce the amount of prisoners you need to sustain hemogenic pawns.

They also do not consume power or hemogen while idling, unlike their contemporaries such as sleep accelerators. Hence, they can be left idle without consequence.

Calculations

Each hemogen amplifier increases the hemogen you gain from all sources. So the more hemogen you use between deathrests, the more effective a hemogen amplifier will be.

However, the amplifier itself consumes hemogen during each deathrest. It uses 0.5 hemogen packs per day, so it will consume this much hemogen per deathrest:

Deathrest facilities	Deathrest time	Packs consumed
Deathrest casket	3.64 days	1.82
↳+1x Deathrest accelerator	3.03 days	1.52
↳+2x Deathrest accelerator	2.53 days	1.26

A pawn must deathrest every 30 days. Therefore, you can calculate how much hemogen is required to satiate a pawn for 30 days:

Hemogen Packs Consumed	Hemogenic	Hemogen drain
Base	3	15
↳+1x Hemogen amplifier	2.4	12
↳Savings (1 amplifier)	0.6	3

Note: Values are given in hemogen packs for ease of comparison, but this building works equally for all sources of Hemogen.

Thus, if a pawn only has the hemogenic trait alone, and does not use any abilities, then using the hemogen amplifier is a net loss. However, using a hemogenic ability costs Hemogen. The more abilities you use, the more hemogen you need to consume, so the more the hemogen amplifier benefits. So a pawn with only hemogenic can benefit from the amplifier if they spend at least 24.4 hemogen on abilities in the 30 days between deathrests. This is equivalent to 5 uses of Longjump legs, or 1.22 uses of Coagulate.

If a pawn has hemogen drain in addition to hemogenic, the hemogen amplifier always saves on hemogen, regardless of ability use. Of course, using hemogenic abilities still gives more value to the amplifier. Note that sanguophages have hemogen drain by default.