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Default Method- taken from Table 5A Component Leakage Area Method- calculating infiltration based on individual leakage points taken from Table 5C of Manual J8 or Blower Door Method, where the actual leakage is based on a blower door test on the home. Sealed, direct vent type fireplaces should Open firebox fireplaces that draw air from inside the home must be included, even if there is a 4” ‘combustion air’ flex bring air into the fireplace. Version 8 goes into very specific detail for a more accurate number. Version 8AE uses Tight, Semi-Tight, Average, Semi-Loose and Loose to evaluate. Version 7 of Manual ] uses Best, Average or Poor to evaluate Infiltration. Infiltration calculations are based on the Construction Quality. TD: the temperature difference between inside and outside design temperatures. Use this wb temperature when selecting cooling condenser from manufacturer’s comprehensive data. A higher wb temperature will result from duct leakage, un-insulated duct or ventilation air- any condition that raises the returnĪir temperature. This will typically beĦ3 °f (75 °f dry bulb) relative humidity). The entering wet-bulb represents the default value wet-bulb temperature across the evaporator coil. Or outside design conditions listed are not the same values listed in Manual J, explain why the different values were used. Provide both heating (htg) and cooling (clg) design temperatures.
If values are adjusted- please justify the adjustment. For example there may be areas in the Salt Lake Valley where the low temperature is historically lower than the airport temperature. It is understood that there may be situations where a slight adjustment to this values is necessary. Temperature data should be from Table 1 or Table 1A of ACCA Manual J.
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Software used may not have the specific location in the database. The city or town must be reasonably close to actual location.
Identify project name, lot number- information that matches the plan submitted. The load information asked for on the summary must be taken from the actual load calculation completed on the project. If “cooling capacity” is greater than 1.15 times the “total heating load”, please justify If “adjusted output” is greater than 1.4 times the “total heating load”, please justifyĪctual SEER rating w/ selection coil, furnace, & meteringĪttach manufacturer’s data showing actual cooling capacity and actual SEER using these components If design conditions used are not those listed in Table 1 / 1A Manual 3, please justify. This sheet has been developed for homs built in Utah’s dry dimares- do not use for other climate conditions.Īssume no higher than 63 °f unless there is ventilation air or significant duct leakage or heat gain Room loads are a mandatory requirement for making Manual D duct sizing calculations. NOTE: The load calculation must be calculated on a room basis. Landlord (Tenant) Recommendation Letter.
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