Perfectly Snug

Preheating Setup

Preheating warms your bed before you get in, so you're never climbing into a cold bed. The heater turns on 60 minutes before your scheduled bedtime and takes at least 15 minutes to be felt — and a full 60 minutes to bring the bed up to temperature.

Before You Start

Cover your bed with a thick duvet during the preheat period. Without blankets on top, there is nothing to retain the heat and the bed will not warm up effectively. Also make sure the area around the side controller is clear of thick blankets or pillows — if the controller is heavily insulated, heater performance will be limited to prevent overheating.

Setting Up Preheating

In the Perfectly Snug App:

1. In the Settings screen, enable the Scheduler and set your sleep and wake times.

2. On the Home screen, set your Start phase level to 1 or higher.

Setting Start to 0 or below (cool or cold) disables preheating entirely.

Choosing a Preheat Level

Level 2 — Takes the chill off without overheating the mattress. The surface will be only a few degrees above room temperature — you may not notice much warmth, but the bed won't feel cold when you get in.

Level 5 — Under a thick duvet, the sleep surface will reach approximately 10°C / 18°F above room temperature. Noticeably warm when you climb in, but not hot. After about 30 minutes in bed you'll likely want the Sleep phase to be cooler.

Level 10 — Approximately 15°C / 27°F above room temperature. Very warm — ideal for cold nights or cold sleepers. After 30 minutes you'll likely want to reduce the Sleep phase level.

A Note on High Levels

Preheating at levels 7–10 is not recommended unless you and the room are very cold. If the bed becomes too hot, it takes 15–30 minutes of high airflow to cool back down, which can disrupt your sleep. Starting lower and adjusting over a few nights is the better approach.

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