NEEDED 2010 ENERGY CODE FIXES: RULE 61G20.1.001

TEXT

RATIONALE

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B-2.6 HVAC systems

B-2.6.1 Standard reference design.

[1 – 7, 10 No change, changes for 8 previously dealt with under 13]

9. The equipment capacities for the standard reference design shall be sized proportionally to the capacities in the proposed design based on sizing runs; i.e., the ratio between the capacities used in the annual simulations and the capacities determined by the sizing runs shall be the same for both the proposed design and standard reference design. Unmet load hours for the proposed design shall not differ from unmet load hours for the standard reference design by more than 50 hours

Unintended results from the integration of previously adopted Florida-specific amendments with the model code. These Florida-specific clauses which were adopted from Chapter 11 of ASHRAE 90.1 were not previously in the code or in the program. By including them designers, in some cases, are facing an unanticipated increase in overall stringency of the code and, in other cases, there is potential of decreased stringency.

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TABLE B-2.2

SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS

Schedules

Same as proposed

Operating schedules shall include hourly profiles for daily operation and shall account for variations between weekdays, weekends, holidays and any seasonal operation. Schedules shall model the time-dependent variations in occupancy, illumination, receptacle loads, thermostat settings, mechanical ventilation, HVAC equipment availability, service hot water usage and any process loads. The schedules shall be typical of the proposed building type as determined by the designer and approved by the jurisdiction. Required schedules shall be identical for the proposed design and standard reference design.

Unintended results from the integration of previously adopted Florida-specific amendments with the model code. These Florida-specific clauses which were adopted from Chapter 11 of ASHRAE 90.1 were not previously in the code or in the program. By including them, there is the potential of unintentionally decreasing in stringency in some cases.

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TABLE 504.2

MINIMUM PERFORMANCE OF WATER-HEATING EQUIPMENT

Electric table top water heaters

≤ 12 kW

Resistance = ≥ 20 gal

0.93 - 0.00132V EF

DOE 10 CFR Part 430

Equivalency of standards.

When updating Table 504.2 to ASHRAE 90.1-2010, a typographical error was made which should be corrected.