Heating that knows what the rest of the house knows.
A heat pump knows nothing of the roof, an air conditioner nothing of the thermostat in the living room. In Lenou they belong to the same house.
What it is
In most houses heating is a collection: a heat pump with its own controller, an air conditioner with its own remote, thermostats on the home automation, and ventilation in the attic. Each knows what it measures itself, and nothing of the rest — not the tariff, not the sun on the roof.
Lenou puts them in one overview, and lets the heat pump respond to what the rest of the house knows.
What Lenou reads and controls
CTC EcoZenith
The i360, the i555 Pro and the CTCs that speak the same register list, over Modbus TCP. Checked against running units.
- Reads
- Supply and return, tank top and bottom, hot water in store, outdoor temperature, status, compressor speed and hours, power and consumption of the electric heaters, the radiator circuit and the SmartGrid state.
- Controls
- The SmartGrid inputs, the price mode, extra hot water, the hot water programme and the heaters' limit.
- Safe
- Whatever Lenou holds, it writes again every minute. If the box stops, the pump falls back to its own settings within five minutes. Settings in permanent memory are written only when something really changes.
- Limit
- A CTC accepts only one Modbus connection at a time. If another system holds it, Lenou reads the pump through that system, Home Assistant for instance.
myUplink
The cloud behind NIBE, CTC, Contura, Cetetherm and Enertech.
- Reads
- Supply, return, power, compressor and mode; outdoor, hot water and indoor temperature; active alarms. Every five minutes.
- Limit
- Read only. One myUplink connection cannot be shared with another system on the same account.
NIBE, Viessmann, Vaillant and Daikin Altherma over Modbus
Profiles for NIBE S, Viessmann Vitocal, Vaillant aroTHERM and Daikin Altherma.
- Reads
- Supply, return and setpoint, and where the register map gives it the compressor and power.
- Why in progress
- The register numbers are what installers report, not what has been checked at Lenou on a running pump. So these profiles control nothing. Vaillant and Daikin also need a Modbus gateway, each with its own register map.
Daikin air conditioners
Over the indoor unit's Wi-Fi adapter, on the house's own network.
- Reads and controls
- Mode (heat, cool, auto, dry, fan, off), setpoint and room temperature, and whether the unit is running. Adapters are found by themselves.
- Limit
- The newer Onecta adapters have no local API and a daily quota in the cloud; they are deliberately not included.
Mitsubishi Electric (MELCloud)
Air conditioners through the MELCloud account the app uses too.
- Reads and controls
- Mode, setpoint and room temperature; an energy counter where the unit has one.
- Limit
- Air-to-air only. Ecodan heat pumps and Lossnay ventilation are not included.
Innova
Air conditioners and fan coils from 2024 on. They open no port at all on the home network.
- Reads and controls
- Temperature, humidity, setpoint, mode, fan speed and swing.
- Limit
- Only through Innova's cloud, with a protocol derived from the app that may shift with an update. The remote always keeps working.
Renson Healthbox 3.0
Demand-controlled ventilation, straight on the network. No Renson cloud.
- Reads
- Per room the air flow, CO₂ and humidity.
- Controls
- A boost per room, which stops by itself after a while.
Tuya and Smart Life
Pool heat pumps such as Fairland, and plugs, switches and lights from the Smart Life or Tuya Smart app, through Tuya's official cloud.
- Reads and controls
- On and off, water temperature and setpoint, the pump's mode; brightness for lights.
- Why in progress
- Not yet tried against a real device. The device has to be in a Smart Life account: a brand app such as Fairland Smart Pool cannot be linked to Tuya's cloud.
Thermostats on the home automation
Climate zones on KNX, Loxone and Niko, on BTicino MyHOME, and radiator valves on Zigbee.
What that means in the app
- The heat pump follows the sun and the tariff. An SG-Ready pump knows four states: normal, cheap, surplus and wait. Lenou picks one every quarter of an hour from the day-ahead price and from what flows to the grid, so the pump heats the tank when power is cheap or free, and waits a while when it is dear.
- Safety rules sit above that: never wait on an old price, no further heating when the tank is hot enough, no waiting when it is too cold, and never longer than a limit in one go.
- With a home battery the sun goes to the battery first. The pump gets the surplus only once the battery is full enough, and gives it back as soon as the battery asks again.
- That works on a CTC straight over Modbus, and on any other SG-Ready pump through two relays on KNX or a Shelly.
- Outside is outside. The outdoor temperature comes first from the weather station, then from the heat pump's sensor, and only then from the forecast — and the app says where it came from.
- Pump, air conditioners, zones and ventilation share one screen. A ventilation boost is allowed from the wall screen too: it costs nothing and stops by itself.
Honest limits
- The Modbus profiles for NIBE, Viessmann, Vaillant and Daikin Altherma only read, until someone has held the registers next to the pump's own list.
- Fan speed and louvres of Daikin and Mitsubishi go along with every command, but are not on screen.
- myUplink controls nothing; Innova and MELCloud do not work without internet.