Water Energy Distributors

100 Maple Ave. Atkinson, N H 03611 Phone 603-362-4666 Fa»: 603-362-4B90

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CONSTRUCTION DESCRIPTIONS

Fr.R-13,3/4" Bead Brd,R2.7 Sheath

ST"0«?- Frame.Dbl Pane, Clear Glass 8B SGDoor.TIM Fr,Single Pane.Clear Glass

PSP^^/Vood Hollow Core Door

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Method Co construction quality Fireplaces

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2002-Mar-07 09:36:14 Page 1

Previous and most available ASHRAE and ACCA employed weather tables for New York City show winter design temperatures for two standard deviations (2_= 10F), it is recommended the new ASHRAE and ACCA table for 3 standard deviations, 0°F be employed in estimating all design requirements.

An unambiguous and agreed to construction report is a requirement for any residential installation.

7.3 Commercial Requirements

Several options are available to the designer for commercial heating and cooling load analysis. These are:

ASHRAE Handbook of Fundamentals & other publications

ACCA Manual-N One-to-one computerization of ASHRAE Handbook of Fundamentals and ARI data

DOE 2

Department of Energy Heat loss and gain analysis, with Cost estimating data

BLAST

DepartmentofEnergyHourbyHouranalysistool

Carrier & Trane Manufacturer'ssoftwareforsizingandoperational costs.

Carrier has easier to use and interpret tables. Both are proven to be accurate sizing and evaluation tools. Carrier appears to be easier to critique inputs for

I errors.

Other Manufacturer Software - not evaluated - however, it is assumed frj manufacturer sponsored software is traceable to the

ASHRAE sources and other responsible sources. With the large amount of input data required for an accurate commercial load insure software employed will be easily critiqued.

Examples of Manual-N output is at figure 7-3. Note the cooling and heating load factors, per ASHRAE are included in the computation. As in the ACCA manual-J analysis, note the use of a construction report. The construction report must be evaluated and agreed to by the general contractor and architect.

Figure 7.3 - Typical Manual-N Reports

Figure 7.3 - Typical Manual-N Reports

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