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Condensing boiler - Wikipedia

Condensing boiler manufacturers claim that up to 98% thermal efficiency can be achieved, compared to 70%-80% with conventional designs (based on the higher heating value of fuels). Typical models offer efficiencies around 90%, which brings most brands of condensing gas boiler in to the highest available categories for energy efficiency.

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Commodity Codes Search – Purchasing

280-30 Control Cables and Wires, Solid and Stranded, Single and Multiconductor (Up to 600V, for use in Boiler Controls, Fire Alarms, Motors, etc.) 280-40 Guy Wires and Cables: Guy Strand, SM, HS, EHS, etc.

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Combustion Evaluation: Sources and Control Devices

Some typical excess air levels in various types of equipment (at zero or minimum smoke) Type /&_ Home Heat Apartment House Boiler Ship's Boiler 60 MW Power Station Heat Input to Furnace -,168 Btu/hr 0.18 2.2 80 600 Excess Air % 40 27 15 3 C0,% 11 13 14 15.7 L.- Table 3.

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