Sentinel X300 Universal Cleaner 1 Litre - New System Flux & Debris Removal Drayton Voice control via Alexa or

Voice control via Alexa or Google Home (with Salus gateway)

In silent mode the indoor unit drops to as low as 21–28 dB(A) — quieter than a whispered conversation — making this ideal for bedrooms

6 kW of heating — making it the right choice for larger living rooms

How noisy is it in real-world use

Sentinel X300 Universal Cleaner 1 Litre - New System Flux & Debris Removal Drayton Voice control via Alexa orThe Sentinel X300 Universal Cleaner (MPN X300) is a powerful, heavy duty cleaner specifically designed for new central heating systems up to six months old, where installation debris such as flux residue, swarf, and manufacturing grease can hinder even heat distribution. Circulated at first fill, X300 passivates metal surfaces and prevents harmful copper deposition, preparing the system properly for long term protection with Sentinel X100 Inhibitor. 1