A panel on your wall. Nothing in the cloud.

Know what your home is doing, and what it is costing you

Larunda learns how your house actually behaves — how it warms up, where the electricity goes, what the heating is really doing — and says so in plain sentences. It runs on a panel on your wall, not in somebody else’s data centre.

Your house keeps working whether or not this website does.

Buy a Larunda See how it works

£999.99 for the panel. No subscription needed.

LARUNDA 06:42 · Tuesday

Start heating at 06:07 to reach 20.5° by 07:00. · your house takes 48 minutes to warm from 17° on mornings like this · 2° outside · settled, from 14 similar days Explaining, not acting

Lounge19.4°

Hall18.1°

Today so far4.2 kWh · £1.09 est.

Front doorclosed

Learning: watching 34 things, for 12 days

The kind of sentence a panel writes. Yours will be about your house.

The lounge warmed from 17° to 21° in 48 minutes, with 2° outside Heating ran 35 minutes longer than the house needed on Tuesday morning The fridge is drawing 140W. It usually draws 90W Front door open for 11 minutes while the heating was on Overnight baseline 210W — something was left on at 01:10 The back bedroom takes twice as long to warm as the rest of the house Last week cost about £19.40 at your tariff, most of it heating The hall sensor has not reported for three days The lounge warmed from 17° to 21° in 48 minutes, with 2° outside Heating ran 35 minutes longer than the house needed on Tuesday morning The fridge is drawing 140W. It usually draws 90W Front door open for 11 minutes while the heating was on Overnight baseline 210W — something was left on at 01:10 The back bedroom takes twice as long to warm as the rest of the house Last week cost about £19.40 at your tariff, most of it heating The hall sensor has not reported for three days

Why it exists

It started with a bill

About fifty pounds a month more than before, and no straightforward way to find out why. Not which room. Not which habit. Not whether the heating had quietly started running an hour longer each morning.

The tools that existed either wanted the whole house uploaded somewhere, or showed a graph and left you to guess. Larunda is the answer to one question: what is this house actually doing, and what is it costing me?

What it looks at

The things a house does that nobody sees

Examples, not promises. Every house is different, and what it finds in yours depends on your house.

Heating running longer than it needs to
Warm-up starting earlier than your house requires
Rooms that take far longer to heat than others
Heating on while the house is empty
What your electricity is doing overnight
What it all costs against your actual tariff

It keeps working when the internet doesn’t

The part that decides whether the heating comes on opens no connection to anything — not as a setting, it has no networking in it at all. If we disappeared tomorrow, your house would carry on exactly as it does today.

Every suggestion comes with its reasons

Start heating at 06:07 to reach 20.5°C by 07:00. Leave it explaining — telling you what it would have done, and doing nothing — for as long as you like. Watch it before you trust it.

Nothing happens without your permission

Acting on its own is granted one thing at a time, within limits you set. Touch a control yourself and it stands down for two hours without being asked.

0network connections from the part that runs your heating

8things it starts watching the day it is switched on

1key to your backups, and it never leaves your house

£0a month to keep everything the panel does

If the panel fails

Your home is not gone

Every night the panel seals a copy of your home — rooms, schedules, paired devices, everything it has learned — and sends it to us. Sealed with a key that never leaves your house, which means we hold it and cannot read it. A replacement panel brings all of it back; the restore is free, the new panel is bought in the usual way.

It also means a backup can only be opened with your recovery key. Lose it and we cannot help you — and neither can anybody who steals a copy of our database. That is the trade, and it is deliberate.

Ready to know where it is going?

Buy a Larunda or ask us something