you should NOT use a Glow-worm flue on a Main boiler (or mix manufacturers’ flues). Here’s why 👇 ✅ 1) Manufacturer approval & certification Boilers and flues are tested and certified as a complete system. A Glow-worm flue is only approved for Glow-worm boilers, not Main boilers. If you mix them: • It voids the boiler warranty ❌ • It breaks the boiler’s CE/UKCA certification ❌ • It can be classed as non-compliant with Gas Safe regulations ❌ ✅ 2) Safety & performance Even if it “fits”, the flue:

🔧 A quick look inside the Glow-worm Energy boiler 🔧 These boilers have been designed really well — everything inside is easy to access and clearly laid out, making them a dream to work on 👌🏻 They’re compact, quiet, and super-efficient, perfect for modern homes where space and performance matter. ✅ 10-year parts & labour warranty ✅ Fantastic backup & technical support ✅ Easy servicing and maintenance It’s no wonder we fit so many of them — they’ve proven themselves time and time again 💪🏻 #J