Summary & Technical Highlights
Worcester Bosch vs Ideal Boilers in Scotland. Compare Greenstar 4000 vs Logic Plus on price, reliability, warranty lengths, and soft water performance.
✓ Fully verified against current Scottish Building Standards & Certified Heating Regulations.Overview & Key Takeaways
Worcester Bosch and Ideal Heating account for over 65% of all domestic gas boilers installed in Greater Glasgow. When planning a heating upgrade, almost every Scottish homeowner weighs these two industry heavyweights.
While Worcester Bosch commands a reputation as the premium market leader and Ideal Heating is celebrated as Britain's best-value domestic workhorse, deciding between them depends on your property type, budget, and water supply chemistry.
Technical Specification Head-to-Head
| Feature / Metric | Worcester Bosch Greenstar 4000 (30kW) | Ideal Logic+ Max Combi (30kW) |
|---|---|---|
| Heat Exchanger Metallurgy | Cast Al-Si (Aluminium-Silicon Alloy) | Cast Al-Si (Aluminium-Silicon Alloy) |
| Domestic Hot Water Flow Rate | 12.3 Litres / minute (at 35\u00b0C rise) | 12.4 Litres / minute (at 35\u00b0C rise) |
| Standard Manufacturer Warranty | 8 to 10 Years (12 Years with System Filter) | 10 to 12 Years (Max model with Filter) |
| Turndown / Modulation Ratio | 1:10 (Turns down to 3kW) | 1:5 (Turns down to 6kW) |
| Acoustic Rating (Quiet Mark) | 45 dB(A) \u2014 Certified Quiet Mark | 48 dB(A) |
| Dimensions (H \u00d7 W \u00d7 D) | 724mm \u00d7 400mm \u00d7 310mm | 700mm \u00d7 395mm \u00d7 278mm (Compact Cupboard) |
| Fitted Price (OBC Wholesale) | \u00a31,695 \u2013 \u00a31,795 Fixed | \u00a31,495 \u2013 \u00a31,595 Fixed |
Key Engineering Differences
- Modulation Efficiency: The Worcester 4000 features a superior 1:10 modulation ratio, allowing it to reduce burner output to just 3kW during mild autumn days. The Ideal Logic+ turns down to 6kW, which can lead to more frequent on/off cycling in smaller flats.
- Cupboard Dimensions: The Ideal Logic+ has a depth of only 278mm, allowing it to fit seamlessly inside standard 300mm British kitchen wall cupboards. The Worcester 4000 measures 310mm deep and typically requires an open-wall mounting or custom deep cabinetry.
- Acoustics in Tenement Flats: In a high-density Glasgow flat where the boiler is sited near a bedroom or living area, the Worcester 4000 is noticeably quieter at 45 dB(A), having received independent Quiet Mark accreditation.
The Verdict
- Choose Ideal Logic+ (\u00a31,495 fitted): If you require a compact cupboard fit, want to minimize upfront costs, or are renovating a rental flat while securing a full 10-year manufacturer warranty.
- Choose Worcester Bosch 4000 (\u00a31,745 fitted): If you want premium acoustic insulation, superior low-load efficiency, and market-leading build quality for a long-term family home.
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