Remarks

Boiler lock-out above 60 degrees F, in lieu of continuous operation.

Use weather data to determine hours above 60 degrees F when the boiler will now be off, and estimate savings from boiler standby losses for these times.

Thermal losses from distribution piping will add to cooling load if boiler runs in summer.

Rule of Thumb: Boilers left idling all summer instead of being turned off in warm weather have been found to increase gas use by 30% Values were taken from an Hourly Analysis Program for one building Climate Zone 2. Calculated savings were conservatively reduced by 30%.

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