4.3: Boilers and Hot Water Systems

(10 maximum points possible)

4.3.1 Boilers and Water Heaters (3 points)

GREEN GLOBES #4.3.1.1 - ANSI #9.3.1.1 Do boilers AND/OR water heaters have the following features:

GREEN GLOBES #4.3.1.1.1 - ANSI #9.3.1.1.1 Boiler systems with over 50 BHP have condensate return systems?

• Yes (2 points)
• No (0 points)
• N/A

Assessment Guidance

Not applicable where there will be no steam boilers or where steam boilers are less than 200 BHP.

GREEN GLOBES #4.3.1.1.2 - ANSI #9.3.1.1.2, 9.3.1.1.3 Non steam boilers have conductivity controllers AND/OR steam boilers have conductivity meters?

• Non-steam boilers have conductivity controllers (1 points) 
• Steam boilers have conductivity meters (1 points) 
• Both non-steam and steam boilers have conductivity controllers (1 points) 
• No (0 points) 
• N/A

Assessment Guidance

Not applicable where there are no boilers.

4.3.2 Domestic Hot Water Systems (7 points)

GREEN GLOBES #4.3.2.1 - ANSI #9.3.2.1 Is energy and water conserved by designing efficient hot water delivery piping systems by one of the following options?

• A maximum of 48 oz. from a water heater AND/OR a maximum of 24oz from a recirculation or similar hot water line (4 points) 
• A maximum of 64 oz. from a water heater AND/OR a maximum of 24oz from a recirculation or similar hot water line (3 points) 
• A maximum of 96 oz. from a water heater AND/OR a maximum of 36oz from a recirculation or similar hot water line (2 points) 
• None of the above (0 points)

Assessment Guidance

Reduce hot water piping volume to all lavatory sinks, kitchen sinks, and showers.

GREEN GLOBES #4.3.2.2 - ANSI #9.3.2.2 What is the percentage of a reduction of hot water waste to lavatory sinks, kitchen sinks, and showers by use of hot water recirculating systems that use occupant sensors, occupant controls, and thermocouples to reduce waiting times and water purged down the drain?

• >90% (3 points) 
• ≥75 and ≤90% (2 points) 
• <75% (0 points)

Assessment Guidance

Continuously operating recirculation systems and recirculation systems on timers are not eligible for this credit.

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