Setting up your Erthy
— the right way.
Setting Up the Sheet
Lay the grounding sheet across your mattress in the middle — where your body rests. Put your regular fitted sheet over the top of it.
Snap the cord onto the port on the sheet until it clicks. That's the bed side done.
A thin natural-fabric layer between you and the sheet is fine. Avoid anything thick or synthetic — it interrupts the connection.
Where to Place the Rod
Find the nearest window or door to your bedroom that has soil access outside — a garden bed, lawn, or any patch of bare earth you can reach.
Push the rod all the way into the ground. Deeper contact means better conductivity.
Ideal placement:
- Moist soil works best
- Within 40 ft of your window (total reach from the sheet is approximately 55 ft)
- Away from underground utilities — water pipes, electrical cables, gas lines
Note: If you're unsure about buried utilities, contact your local utility service before placing the rod. Standard safety practice.
Running the Cord Through Your Window
The cord is thin — noticeably thinner than a phone charging cable. Route it through the gap at the bottom corner of your window, lower the window down onto it, and tuck it into the corner. From the outside you'd barely know it's there.
The window will need to be open just a small amount — a gap of a few millimetres is all it takes.
If you have a screen:
- Leave one corner of the screen slightly unclipped and run the cord underneath — the screen sits flush and you won't notice it
- Or feed the cord through a small hole made with a pin or awl at the bottom edge
Either way, the screen stays on.
The Outlet Option — For Apartments & Travel
No soil access? The cord plugs directly into any standard 3-prong grounded outlet. No adapter, nothing extra.
This is a real ground. Your building's electrical system connects to a buried ground rod near the foundation — plugging in gives you access to that same earth through the building's circuit.
We'll be straight with you: a wall outlet ground shares its path with the building's electrical system and carries some electrical noise that a direct rod bypasses entirely. For daily home use, we prefer the rod. But the outlet is a genuine ground — and it means your Erthy works wherever you find a standard 3-prong outlet, including hotels and travel.
Storm Safety
The cord has a built-in 100kΩ current-limiting resistor — the same safety standard used across grounding products and home electrical systems. Rain and normal outdoor weather are completely fine.
During a lightning storm, you can unplug the cord at the sheet as a precaution — the same thing you'd do with any grounded electronics in your home. It takes a few seconds.
Keep the rod away from buried utility lines, electrical boxes, and irrigation controllers.
Caring for Your Sheet
Because the grounding sheet sits under your fitted sheet, it stays clean on its own. Most people rarely need to wash it.
When you do:
- Cold water, gentle cycle
- No fabric softener — ever. It coats the conductive fibres and reduces conductivity over time
- Air dry, or tumble dry on low
Washed correctly, the sheet maintains its conductivity well over time. Fabric softener is the main thing to avoid — it coats the conductive fibres and reduces conductivity faster than washing alone.