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Glow-worm - Boiler Efficiency Ratings

Boiler Efficiency Rating

You can find out the energy efficiency of your boiler by checking its energy rating; you can do this now by selecting the make and model below.

A boiler’s energy rating is an indicator of its efficiency when used within an average domestic household. It's a great benchmark for comparing new boilers and can help you work out how much money you could save on energy bills if you replaced your current boiler with a more efficient model.

For new boiler installations call British Gas Boilers on 0333 230 5216 for a no-obligation quote. Alternatively visit Boiler Guide to request quotes from independent local and regional heating engineers.

Glow-worm Boilers

ModelTypeFuelEfficiencyMore Info
Glow-worm 105-120 105-120 Non-Condensing Gas 65% More Info
Glow-worm 105-120B 105-120B Non-Condensing Gas 65% More Info
Glow-worm 12hxi Condensing Gas 90.5% More Info
Glow-worm 15hxi Condensing Gas 90.5% More Info
Glow-worm 18hxi Condensing Gas 90.4% More Info
Glow-worm 18sxi Condensing Gas 90.4% More Info
Glow-worm 23c Non-Condensing Gas 79.9% More Info
Glow-worm 240 Non-Condensing Gas 65% More Info
Glow-worm 246 Non-Condensing Gas 65% More Info
Glow-worm 24ci Non-Condensing Gas 78.3% More Info
Glow-worm 24ci Plus Non-Condensing Gas 78.3% More Info
Glow-worm 24cxi Condensing Gas 90.3% More Info
Glow-worm 24hxi Condensing Gas 90.5% More Info
Glow-worm 30 ci Non-Condensing Gas 79.6% More Info
Glow-worm 30 si Non-Condensing Gas 79.7% More Info
Glow-worm 30ci Plus Non-Condensing Gas 79.6% More Info
Glow-worm 30cxi Condensing Gas 90.3% More Info
Glow-worm 30cxi Condensing LPG 92.2% More Info
Glow-worm 30hxi Condensing Gas 90.6% More Info
Glow-worm 30hxi Condensing LPG 92.2% More Info
Glow-worm 30sxi Condensing Gas 90.6% More Info
Glow-worm 30sxi Condensing LPG 92.2% More Info
Glow-worm 35ci Non-Condensing Gas 78.6% More Info
Glow-worm 38cxi Condensing Gas 90.4% More Info
Glow-worm 38hxi Condensing Gas 90.8% More Info
Glow-worm 45 Non-Condensing Gas 65% More Info
Glow-worm 45-60 45-60 Non-Condensing Gas 65% More Info
Glow-worm 45-60B 45-60B Non-Condensing Gas 65% More Info
Glow-worm 45/2 BBU Non-Condensing Gas 68.4% More Info
Glow-worm 45/4 BBU Non-Condensing Gas 78.4% More Info
Glow-worm 45F Non-Condensing Gas 65% More Info
Glow-worm 45FR Non-Condensing Gas 65% More Info
Glow-worm 54/4 BBU Non-Condensing Gas 78.9% More Info
Glow-worm 56 Non-Condensing Gas 65% More Info
Glow-worm 56/2 BBU Non-Condensing Gas 68.1% More Info
Glow-worm 56/3e BBU Non-Condensing Gas 78.5% More Info
Glow-worm 56/3pp BBU Non-Condensing Gas 74.5% More Info
Glow-worm 56F Non-Condensing Gas 65% More Info
Glow-worm 56FR Non-Condensing Gas 65% More Info
Glow-worm 65-80 65-80 Non-Condensing Gas 65% More Info
Glow-worm 65-80B 65-80B Non-Condensing Gas 65% More Info
Glow-worm 85-100 85-100 Non-Condensing Gas 65% More Info
Glow-worm 85-100B 85-100B Non-Condensing Gas 65% More Info
Glow-worm BBU 45/4 Chatsworth 4 Non-Condensing Gas 79.5% More Info
Glow-worm BBU 45/4 Dovedale 4 Non-Condensing Gas 79.5% More Info
Glow-worm BBU 45/4 Firelite 4 Non-Condensing Gas 78.4% More Info
Glow-worm BBU 45/4 Contour 4 Non-Condensing Gas 78.4% More Info
Glow-worm BBU 45/4 Heartbeat 4 Non-Condensing Gas 78.4% More Info
Glow-worm BBU 45/4 Miami 4 Non-Condensing Gas 78.4% More Info
Glow-worm BBU 45/4 Black Beauty 4 Non-Condensing Gas 78.4% More Info
Glow-worm BBU 54/4 Chatsworth 4 Non-Condensing Gas 79.4% More Info
Glow-worm BBU 54/4 Dovedale 4 Non-Condensing Gas 79.4% More Info
Glow-worm BBU 54/4 Heartbeat 4 Non-Condensing Gas 78.8% More Info
Glow-worm BBU 54/4 Black Beauty 4 Non-Condensing Gas 78.8% More Info
Glow-worm BBU 54/4 Contour 4 Non-Condensing Gas 78.8% More Info
Glow-worm BBU 54/4 Firelite 4 Non-Condensing Gas 78.8% More Info
Glow-worm BBU 54/4 Miami 4 Non-Condensing Gas 78.8% More Info
Glow-worm Betacom 24 Condensing Gas 86.7% More Info
Glow-worm Betacom 24a Condensing Gas 90.0% More Info
Glow-worm Betacom 24a Condensing LPG 91.7% More Info
Glow-worm Betacom 24c Condensing Gas 86.0% More Info
Glow-worm Betacom 24c Condensing LPG 87.0% More Info
Glow-worm Betacom 28a Condensing Gas 90.1% More Info
Glow-worm Betacom 28a Condensing LPG 92.1% More Info
Glow-worm Betacom 30 Condensing Gas 87.1% More Info
Glow-worm Betacom 30c Condensing Gas 86.4% More Info
Glow-worm Betacom 30c Condensing LPG 87.3% More Info
Glow-worm Betacom2 24 Condensing Gas 90% More Info
Glow-worm Betacom2 24 Condensing LPG 91.7% More Info
Glow-worm Betacom2 28 Condensing Gas 89.8% More Info
Glow-worm Betacom2 28 Condensing LPG 91.0% More Info
Glow-worm Camelot 240/6 Non-Condensing Gas 65% More Info
Glow-worm Capricorn 246 Non-Condensing Gas 65% More Info
Glow-worm Capricorn 240/6 Non-Condensing Gas 65% More Info
Glow-worm Compact 100 System A Non-Condensing Gas 79.3% More Info
Glow-worm Compact 100e Non-Condensing Gas 78.2% More Info
Glow-worm Compact 100e A Non-Condensing Gas 79.2% More Info
Glow-worm Compact 100p Non-Condensing Gas 71.6% More Info
Glow-worm Compact 60 System A Non-Condensing Gas 79.5% More Info
Glow-worm Compact 75e Non-Condensing Gas 77.5% More Info
Glow-worm Compact 75p Non-Condensing Gas 72.1% More Info
Glow-worm Compact 80e Non-Condensing Gas 77.8% More Info
Glow-worm Compact 80e A Non-Condensing Gas 79.5% More Info
Glow-worm Compact 80p Non-Condensing Gas 72.2% More Info
Glow-worm Easicom 24 Condensing Gas 90.0% More Info
Glow-worm Easicom 24 Condensing LPG 91.7% More Info
Glow-worm Easicom 28 Condensing Gas 89.8% More Info
Glow-worm Easicom 28 Condensing LPG 91.0% More Info
Glow-worm Economy Plus 75B Non-Condensing Gas 65% More Info
Glow-worm Economy Plus 100f Non-Condensing Gas 72% More Info
Glow-worm Economy Plus 24B Non-Condensing Gas 75.1% More Info
Glow-worm Economy Plus 24F Non-Condensing Gas 77.2% More Info
Glow-worm Economy Plus 30B Non-Condensing Gas 71.3% More Info
Glow-worm Economy Plus 30C Non-Condensing Gas 72.4% More Info
Glow-worm Economy Plus 30F Non-Condensing Gas 75.7% More Info
Glow-worm Economy Plus 40B Non-Condensing Gas 71.9% More Info
Glow-worm Economy Plus 40C Non-Condensing Gas 71.9% More Info
Glow-worm Economy Plus 40F Non-Condensing Gas 77.0% More Info
Glow-worm Economy Plus 50B Non-Condensing Gas 73.1% More Info
Glow-worm Economy Plus 50C Non-Condensing Gas 72.4% More Info
Glow-worm Economy Plus 50F Non-Condensing Gas 76.3% More Info
Glow-worm Economy Plus 60B Non-Condensing Gas 75.4% More Info
Glow-worm Economy Plus 60C Non-Condensing Gas 73.8% More Info
Glow-worm Economy Plus 60F Non-Condensing Gas 75.8% More Info
Glow-worm Economy Plus 80F Non-Condensing Gas 77.6% More Info
Glow-worm Energysaver 30 Condensing Gas 86.6% More Info
Glow-worm Energysaver 30e Condensing Gas 86.6% More Info
Glow-worm Energysaver 40 Condensing Gas 86.7% More Info
Glow-worm Energysaver 40e Condensing Gas 86.7% More Info
Glow-worm Energysaver 40P Condensing LPG 86.7% More Info
Glow-worm Energysaver 50 Condensing Gas 86.8% More Info
Glow-worm Energysaver 50e Condensing Gas 86.8% More Info
Glow-worm Energysaver 50P Condensing LPG 86.8% More Info
Glow-worm Energysaver 60 Condensing Gas 86.9% More Info
Glow-worm Energysaver 60e Condensing Gas 86.9% More Info
Glow-worm Energysaver 60P Condensing LPG 86.8% More Info
Glow-worm Energysaver 70 Condensing Gas 87.9% More Info
Glow-worm Energysaver 80 Condensing Gas 87.9% More Info
Glow-worm Energysaver 80P Condensing LPG 88.0% More Info
Glow-worm Energysaver Combi 100 Condensing Gas 90.4% More Info
Glow-worm Energysaver Combi 80 Condensing Gas 90.6% More Info
Glow-worm Flexicom 12hx Condensing Gas 90.7% More Info
Glow-worm Flexicom 15hx Condensing Gas 90.5% More Info
Glow-worm Flexicom 18hx Condensing Gas 90.4% More Info
Glow-worm Flexicom 18sx Condensing Gas 90.3% More Info
Glow-worm Flexicom 24cx Condensing Gas 90.3% More Info
Glow-worm Flexicom 24hx Condensing Gas 90.3% More Info
Glow-worm Flexicom 30cx Condensing Gas 90.0% More Info
Glow-worm Flexicom 30hx Condensing Gas 90.0% More Info
Glow-worm Flexicom 30sx Condensing Gas 90.1% More Info
Glow-worm Flexicom 35cx Condensing Gas 90.2% More Info
Glow-worm Flexicom 35hx Condensing Gas 90.3% More Info
Glow-worm Fuelsaver 30-40B Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 40-50b Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 25-30 Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 30-40 Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 25-30B Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 60-70b Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 55-60b Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 40-50 Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 40mk2 Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 40bmk2 Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 30mk2 Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 30bmk2 Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 60bmk2 Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 50bmk2 Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 60mk2 Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 75bmk2 Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 50mk2 Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 75mk2 Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 45f Non-Condensing Gas 68% More Info
Glow-worm Fuelsaver 80f Non-Condensing Gas 68% More Info
Glow-worm Fuelsaver 35f Non-Condensing Gas 68% More Info
Glow-worm Fuelsaver 65f Non-Condensing Gas 68% More Info
Glow-worm Fuelsaver 55f Non-Condensing Gas 68% More Info
Glow-worm Fuelsaver 50brmk2 Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 60brmk2 Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 75brmk2 Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 40brmk2 Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 30brmk2 Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver 100F Non-Condensing Gas 72% More Info
Glow-worm Fuelsaver Complheat 30 Non-Condensing Gas 76.5% More Info
Glow-worm Fuelsaver Complheat 40 Non-Condensing Gas 76.7% More Info
Glow-worm Fuelsaver Complheat 55 Non-Condensing Gas 76.4% More Info
Glow-worm Fuelsaver Complheat 65 Non-Condensing Gas 79.1% More Info
Glow-worm Fuelsaver Complheat 80 Non-Condensing Gas 79.0% More Info
Glow-worm Fuelsaver Economy Plus 24F Non-Condensing Gas 68% More Info
Glow-worm Fuelsaver Economy Plus 40F Non-Condensing Gas 68% More Info
Glow-worm Fuelsaver Economy Plus 80F Non-Condensing Gas 68% More Info
Glow-worm Fuelsaver Economy Plus 50F Non-Condensing Gas 68% More Info
Glow-worm Fuelsaver Economy Plus 60F Non-Condensing Gas 68% More Info
Glow-worm Fuelsaver Economy Plus 30F Non-Condensing Gas 68% More Info
Glow-worm Fuelsaver Economy Plus 60C Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver Economy Plus 30B Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver Economy Plus 40C Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver Economy Plus 24B Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver Economy Plus 50C Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver Economy Plus 40B Non-Condensing Gas 65% More Info
Glow-worm Fuelsaver Economy Plus 60B Non-Condensing Gas 65% More Info
Glow-worm Galaxie 246 Non-Condensing Gas 65% More Info
Glow-worm Galaxie 240/6 Non-Condensing Gas 65% More Info
Glow-worm Hideaway 60BL Non-Condensing Gas 65% More Info
Glow-worm Hideaway 80L Non-Condensing Gas 65% More Info
Glow-worm Hideaway 80BL Non-Condensing Gas 65% More Info
Glow-worm Hideaway 60L Non-Condensing Gas 65% More Info
Glow-worm Hideaway 90of Non-Condensing Gas 65% More Info
Glow-worm Hideaway 70of Non-Condensing Gas 65% More Info
Glow-worm Hideaway 100 Non-Condensing Gas 72.1% More Info
Glow-worm Hideaway 100B Non-Condensing Gas 73.0% More Info
Glow-worm Hideaway 100BFF Non-Condensing Gas 79.9% More Info
Glow-worm Hideaway 100CFF Non-Condensing Gas 79.9% More Info
Glow-worm Hideaway 115BFF Non-Condensing Gas 78.7% More Info
Glow-worm Hideaway 115CFF Non-Condensing Gas 78.7% More Info
Glow-worm Hideaway 120 Non-Condensing Gas 73.0% More Info
Glow-worm Hideaway 120B Non-Condensing Gas 72.0% More Info
Glow-worm Hideaway 40 Non-Condensing Gas 70.8% More Info
Glow-worm Hideaway 40B Non-Condensing Gas 71.5% More Info
Glow-worm Hideaway 40BFF Non-Condensing Gas 78.3% More Info
Glow-worm Hideaway 40CFF Non-Condensing Gas 78.3% More Info
Glow-worm Hideaway 50 Non-Condensing Gas 71.0% More Info
Glow-worm Hideaway 50B Non-Condensing Gas 71.4% More Info
Glow-worm Hideaway 50BFF Non-Condensing Gas 78.2% More Info
Glow-worm Hideaway 50CFF Non-Condensing Gas 78.2% More Info
Glow-worm Hideaway 60 Non-Condensing Gas 71.3% More Info
Glow-worm Hideaway 60B Non-Condensing Gas 71.7% More Info
Glow-worm Hideaway 60BFF Non-Condensing Gas 78.5% More Info
Glow-worm Hideaway 60CFF Non-Condensing Gas 78.5% More Info
Glow-worm Hideaway 70 Non-Condensing Gas 71.8% More Info
Glow-worm Hideaway 70B Non-Condensing Gas 72.5% More Info
Glow-worm Hideaway 80 Non-Condensing Gas 71.7% More Info
Glow-worm Hideaway 80B Non-Condensing Gas 72.6% More Info
Glow-worm Hideaway 80BFF Non-Condensing Gas 78.4% More Info
Glow-worm Hideaway 80CFF Non-Condensing Gas 78.4% More Info
Glow-worm Hideaway 90 Non-Condensing Gas 71.7% More Info
Glow-worm Hideaway 90B Non-Condensing Gas 72.8% More Info
Glow-worm Inset BBU 40 Non-Condensing Gas 75.5% More Info
Glow-worm Inset BBU 50 Non-Condensing Gas 77.6% More Info
Glow-worm Majorca 346 Non-Condensing Gas 65% More Info
Glow-worm Majorca 246 Non-Condensing Gas 65% More Info
Glow-worm Majorca 240/6 Non-Condensing Gas 65% More Info
Glow-worm Majorca 340/6auto Non-Condensing Gas 65% More Info
Glow-worm Majorca 340/6 Non-Condensing Gas 65% More Info
Glow-worm Micron 100FF Non-Condensing Gas 79.5% More Info
Glow-worm Micron 120FF Non-Condensing Gas 78.1% More Info
Glow-worm Micron 30 FF Non-Condensing Gas 78.3% More Info
Glow-worm Micron 30FF Non-Condensing Gas 76.6% More Info
Glow-worm Micron 40 FF Non-Condensing Gas 78.7% More Info
Glow-worm Micron 40FF Non-Condensing Gas 77.3% More Info
Glow-worm Micron 50FF Non-Condensing Gas 78.9% More Info
Glow-worm Micron 60 FF Non-Condensing Gas 78.8% More Info
Glow-worm Micron 60FF Non-Condensing Gas 77.2% More Info
Glow-worm Micron 70 FF Non-Condensing Gas 78.3% More Info
Glow-worm Micron 70FF Non-Condensing Gas 77.4% More Info
Glow-worm Micron 80 FF Non-Condensing Gas 78.3% More Info
Glow-worm Micron 80FF Non-Condensing Gas 77.2% More Info
Glow-worm Micron100FF Non-Condensing Gas 77.5% More Info
Glow-worm Royale 246 Non-Condensing Gas 65% More Info
Glow-worm Royale 240/6 Non-Condensing Gas 65% More Info
Glow-worm Saunier Duval SB30e A Non-Condensing Gas 79.3% More Info
Glow-worm Saunier Duval SD30e A Non-Condensing Gas 79.2% More Info
Glow-worm Spacesaver 50bf Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 38bf Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 22-30b Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 52 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 75bf Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 38 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 45-60 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 45-60b Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 22-30f Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 60f Non-Condensing Gas 68% More Info
Glow-worm Spacesaver 40f Non-Condensing Gas 68% More Info
Glow-worm Spacesaver 30bmk2 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 30mk2 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 30brmk2 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 40bmk2 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 80bmk2 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 60mk2 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 60bmk2 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 50mk2 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 50bmk2 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 40mk2 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 50f Non-Condensing Gas 68% More Info
Glow-worm Spacesaver 30-40f Non-Condensing Gas 68% More Info
Glow-worm Spacesaver 40-50rf Non-Condensing Gas 68% More Info
Glow-worm Spacesaver 20-30f Non-Condensing Gas 68% More Info
Glow-worm Spacesaver 20-30rfs Non-Condensing Gas 68% More Info
Glow-worm Spacesaver 20-30rf Non-Condensing Gas 68% More Info
Glow-worm Spacesaver 30-40rf Non-Condensing Gas 68% More Info
Glow-worm Spacesaver 50-60rfs Non-Condensing Gas 68% More Info
Glow-worm Spacesaver 40-50rfs Non-Condensing Gas 68% More Info
Glow-worm Spacesaver 30-40rfs Non-Condensing Gas 68% More Info
Glow-worm Spacesaver 50-60rf Non-Condensing Gas 68% More Info
Glow-worm Spacesaver 60brmk2 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 80brmk2 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 75 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 50rmk2 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 40rmk2 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 60rmk2 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 30rmk2 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 40brmk2 Non-Condensing Gas 65% More Info
Glow-worm Spacesaver 65-75f Non-Condensing Gas 68% More Info
Glow-worm Spacesaver Complheat 60 Non-Condensing Gas 72% More Info
Glow-worm Spacesaver Complheat 70 Non-Condensing Gas 72% More Info
Glow-worm Spacesaver Kfb 60 Non-Condensing Gas 68% More Info
Glow-worm Spacesaver Kfb 70 Non-Condensing Gas 68% More Info
Glow-worm Spacesaver Kfb 20 Non-Condensing Gas 68% More Info
Glow-worm Suburban Suburban Non-Condensing Gas 65% More Info
Glow-worm Super 40b Non-Condensing Gas 65% More Info
Glow-worm Super 40 Non-Condensing Gas 65% More Info
Glow-worm Super 30b Non-Condensing Gas 65% More Info
Glow-worm Super 30 Non-Condensing Gas 65% More Info
Glow-worm Super 52b Non-Condensing Gas 65% More Info
Glow-worm Super 52 Non-Condensing Gas 65% More Info
Glow-worm Swiftflow 100 Non-Condensing Gas 70% More Info
Glow-worm Swiftflow 75 Non-Condensing Gas 70% More Info
Glow-worm Swiftflow 80 Non-Condensing Gas 70% More Info
Glow-worm Swiftflow 100 Honeywell valve Non-Condensing Gas 70.7% More Info
Glow-worm Swiftflow 100 SIT valve Non-Condensing Gas 70.7% More Info
Glow-worm Swiftflow 100e Non-Condensing Gas 76.6% More Info
Glow-worm Swiftflow 120 Non-Condensing Gas 73.1% More Info
Glow-worm Swiftflow 125e Non-Condensing Gas 79.4% More Info
Glow-worm Swiftflow 75 Honeywell valve Non-Condensing Gas 71.4% More Info
Glow-worm Swiftflow 75 SIT valve Non-Condensing Gas 71.4% More Info
Glow-worm Swiftflow 75e Non-Condensing Gas 76.5% More Info
Glow-worm Swiftflow 80 SIT valve Non-Condensing Gas 73.1% More Info
Glow-worm Swiftflow 80 Honeywell valve Non-Condensing Gas 73.1% More Info
Glow-worm Swiftflow 80e Non-Condensing Gas 76.6% More Info
Glow-worm Ultimate 80bf Non-Condensing Gas 65% More Info
Glow-worm Ultimate 24h Condensing Gas 90.3% More Info
Glow-worm Ultimate 35c Condensing Gas 89.9% More Info
Glow-worm Ultimate 35c Condensing LPG 91.5% More Info
Glow-worm Ultimate 100 FF Non-Condensing Gas 79.5% More Info
Glow-worm Ultimate 100FF Non-Condensing Gas 77.5% More Info
Glow-worm Ultimate 120FF Non-Condensing Gas 78.1% More Info
Glow-worm Ultimate 30BF Non-Condensing Gas 73.0% More Info
Glow-worm Ultimate 30c Condensing Gas 89.8% More Info
Glow-worm Ultimate 30c Condensing LPG 91.5% More Info
Glow-worm Ultimate 30FF Non-Condensing Gas 79.7% More Info
Glow-worm Ultimate 30FF/LP Non-Condensing LPG 78.0% More Info
Glow-worm Ultimate 40 FF Non-Condensing Gas 78.7% More Info
Glow-worm Ultimate 40BF Non-Condensing Gas 72.1% More Info
Glow-worm Ultimate 40FF Non-Condensing Gas 75.4% More Info
Glow-worm Ultimate 40FF/LP Non-Condensing LPG 78.0% More Info
Glow-worm Ultimate 50 FF Non-Condensing Gas 78.8% More Info
Glow-worm Ultimate 50BF Non-Condensing Gas 73.1% More Info
Glow-worm Ultimate 50BF/LP Non-Condensing LPG 74.8% More Info
Glow-worm Ultimate 50FF Non-Condensing Gas 76.0% More Info
Glow-worm Ultimate 50FF/LP Non-Condensing LPG 80.1% More Info
Glow-worm Ultimate 60 FF Non-Condensing Gas 79.4% More Info
Glow-worm Ultimate 60BF Non-Condensing Gas 75.6% More Info
Glow-worm Ultimate 60FF Non-Condensing Gas 76.6% More Info
Glow-worm Ultimate 60FF/LP Non-Condensing LPG 77.5% More Info
Glow-worm Ultimate 70 FF Non-Condensing Gas 79.3% More Info
Glow-worm Ultimate 70FF Non-Condensing Gas 77.1% More Info
Glow-worm Ultimate 80 FF Non-Condensing Gas 79.4% More Info
Glow-worm Ultimate 80FF Non-Condensing Gas 76.3% More Info
Glow-worm Ultimate 80FF/LP Non-Condensing LPG 79.8% More Info
Glow-worm Ultracom 12hxi Condensing Gas 90.5% More Info
Glow-worm Ultracom 12hxi Condensing LPG 91.6% More Info
Glow-worm Ultracom 15hxi Condensing Gas 90.5% More Info
Glow-worm Ultracom 15hxi Condensing LPG 91.6% More Info
Glow-worm Ultracom 18hxi Condensing Gas 90.4% More Info
Glow-worm Ultracom 18hxi Condensing LPG 91.5% More Info
Glow-worm Ultracom 18sxi Condensing Gas 90.4% More Info
Glow-worm Ultracom 18sxi Condensing LPG 91.5% More Info
Glow-worm Ultracom 2 12sxi Condensing Gas 90.4% More Info
Glow-worm Ultracom 2 18sxi Condensing Gas 90.4% More Info
Glow-worm Ultracom 2 18sxi Condensing LPG 92.1% More Info
Glow-worm Ultracom 2 24cxi Condensing Gas 90.3% More Info
Glow-worm Ultracom 2 24cxi Condensing LPG 92.0% More Info
Glow-worm Ultracom 2 30cxi Condensing Gas 90.3% More Info
Glow-worm Ultracom 2 30cxi Condensing LPG 92.4% More Info
Glow-worm Ultracom 2 30sxi Condensing Gas 90.5% More Info
Glow-worm Ultracom 2 30sxi Condensing LPG 92.5% More Info
Glow-worm Ultracom 2 35 Store Condensing Gas 90.6% More Info
Glow-worm Ultracom 2 35 Store Condensing LPG 92.4% More Info
Glow-worm Ultracom 2 35cxi Condensing Gas 90.4% More Info
Glow-worm Ultracom 2 35cxi Condensing LPG 92.4% More Info
Glow-worm Ultracom 24cx Condensing Gas 90.3% More Info
Glow-worm Ultracom 24cx Condensing LPG 91.4% More Info
Glow-worm Ultracom 24cxi Condensing Gas 90.3% More Info
Glow-worm Ultracom 24cxi Condensing LPG 91.4% More Info
Glow-worm Ultracom 24hxi Condensing Gas 90.5% More Info
Glow-worm Ultracom 24hxi Condensing LPG 91.9% More Info
Glow-worm Ultracom 30cx Condensing Gas 90.3% More Info
Glow-worm Ultracom 30cx Condensing LPG 92.2% More Info
Glow-worm Ultracom 30cxi Condensing Gas 90.3% More Info
Glow-worm Ultracom 30cxi Condensing LPG 92.2% More Info
Glow-worm Ultracom 30hxi Condensing Gas 90.6% More Info
Glow-worm Ultracom 30hxi Condensing LPG 92.2% More Info
Glow-worm Ultracom 30sxi Condensing Gas 90.6% More Info
Glow-worm Ultracom 30sxi Condensing LPG 92.2% More Info
Glow-worm Ultracom 38cxi Condensing Gas 90.4% More Info
Glow-worm Ultracom 38cxi Condensing LPG 91.5% More Info
Glow-worm Ultracom 38hxi Condensing Gas 90.8% More Info
Glow-worm Ultracom 38hxi Condensing LPG 92.4% More Info
Glow-worm Ultrapower 100 SXI Condensing Gas 91.5% More Info
Glow-worm Ultrapower 100 SXI Condensing LPG 92.7% More Info
Glow-worm Ultrapower 170 SXI Condensing Gas 91.5% More Info
Glow-worm Ultrapower 170 SXI Condensing LPG 92.7% More Info
Glow-worm Xtrafast 120 Non-Condensing Gas 78.6% More Info
Glow-worm Xtrafast 96 Non-Condensing Gas 79.4% More Info
Glow-worm Xtramax A Non-Condensing Gas 78.9% More Info
Glow-worm Xtramax HE Condensing Gas 90.6% More Info
Glow-worm Xtramax HE Condensing LPG 92.0% More Info