diff --git a/pkgs/development/python-modules/vallox-websocket-api/default.nix b/pkgs/development/python-modules/vallox-websocket-api/default.nix
new file mode 100644
index 00000000000..53af2f0dd9f
--- /dev/null
+++ b/pkgs/development/python-modules/vallox-websocket-api/default.nix
@@ -0,0 +1,42 @@
+{ lib
+, buildPythonPackage
+, pythonOlder
+, fetchFromGitHub
+, construct
+, websockets
+, asynctest
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "vallox-websocket-api";
+  version = "2.11.0";
+
+  disabled = pythonOlder "3.6";
+
+  format = "setuptools";
+
+  src = fetchFromGitHub {
+    owner = "yozik04";
+    repo = "vallox_websocket_api";
+    rev = version;
+    hash = "sha256-wZiPrPl9ESp43PFdRPvqB2nOg+ogfaArunZOR3Q9cvs=";
+  };
+
+  propagatedBuildInputs = [
+    construct
+    websockets
+  ];
+
+  checkInputs = [
+    asynctest
+    pytestCheckHook
+  ];
+
+  meta = {
+    description = "Async API for Vallox ventilation units";
+    homepage = "https://github.com/yozik04/vallox_websocket_api";
+    license = lib.licenses.lgpl3Only;
+    maintainers = with lib.maintainers; [ dotlambda ];
+  };
+}
diff --git a/pkgs/servers/home-assistant/component-packages.nix b/pkgs/servers/home-assistant/component-packages.nix
index 0bd0731d29f..bc9e7339296 100644
--- a/pkgs/servers/home-assistant/component-packages.nix
+++ b/pkgs/servers/home-assistant/component-packages.nix
@@ -2885,7 +2885,8 @@
     "vacuum" = ps: with ps; [
     ];
     "vallox" = ps: with ps; [
-    ]; # missing inputs: vallox-websocket-api
+      vallox-websocket-api
+    ];
     "vasttrafik" = ps: with ps; [
     ]; # missing inputs: vtjp
     "velbus" = ps: with ps; [
@@ -3734,6 +3735,7 @@
     "utility_meter"
     "uvc"
     "vacuum"
+    "vallox"
     "velbus"
     "venstar"
     "vera"
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index a1699fdec24..f179d913b33 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -10770,6 +10770,8 @@ in {
 
   validobj = callPackage ../development/python-modules/validobj { };
 
+  vallox-websocket-api = callPackage ../development/python-modules/vallox-websocket-api { };
+
   variants = callPackage ../development/python-modules/variants { };
 
   varint = callPackage ../development/python-modules/varint { };