Heat generated by generators or boosters and is stored in an insulated tank filled with pollutant. This tank is a heat buffer for the gas heating buffer room. Excess heat is vented into the atmosphere.
This room is filled with water and contains a buffer system for each gas. Temperature in the room is modified by connections to the atmosphere (to cool) and to the heat system (to heat), both separated by digital valves. The heating system valve is open while the temperature is below the target, and closed while at or above. The atmosphere valve is open while the temperature is above the target, and closed while at or below the target. These two valves allow the buffer room temperature to fluctuate above and below the target temperature until the target is met (or at least to within some error).
If the room temperature tank is below the pressure target, gas is imported from the external storage into the gas buffer. When the buffer room temperature and the gas buffer temperature both reach target, gas from the buffer is dumped into the room temperature tank.