Building HVAC

Building HVAC — single thermal zone, ISO 13790 5R1C reduced-order model.

Action space	Box((1,)), all actions in [-1, 1]
Observation space	Box((7,))
Tracked variable(s)	zone air temperature (deg C)
Episode length	720 steps (648000 s at 900 s per step)
Import	from target_gym import BuildingHVAC, HVACParams
Cite as	hvac-v1

Action space

Actions are normalised to [-1, 1] and mapped onto the plant's real actuator range inside the environment.

#	meaning	min	max
0	commanded heating power	-1	1

Observation space

7 values. Indices (0,) carry the tracked variable(s) that the reward scores.

Rewards

Comfort tracking minus energy use.

Every environment in this suite scores on one contract: the reward is (tracking terms, multiplied) x (1 - weighted costs), bounded in [0, 1], and reaches 1 only while the target is held exactly. See Reward shaping.

Starting state

reset samples the initial condition and the target; state has 10 fields.

Episode end

Termination. See check_is_terminal.

Truncation. After 720 steps.

Baselines

A tuned PID ships with this environment.

Arguments

parameter	default
delta_t	900
max_steps_in_episode	720
A_floor	150
lambda_at	4.5
f_class	2.5
cm_per_area	165000
h_is	3.45
h_ms	9.1
A_wall	120
U_wall	0.28
A_roof	150
U_roof	0.18
A_window	25
U_window	1.3
…	20 more, see the params dataclass