Maria’s Restaurant Appendix A Section 16 HVAC Building Loads

Maria’s Restaurant Maria’s

Maria’s Restaurant Design (Staff: Maria & 7 Employees each shift. Glass Store Front and front door) C1 R1 F1 Woman’s Restroom 1 handicap 1 standard Men’s Restroom 1 handicap 1 urinal S3 Shelv.. R3 DW Bar 12 X 10 Seating 12 Counter C6 Bar S2 B2 Ice R4 Shelving/Storage 25 ft. Shelv. B1 C7 C2 Fry S1 Restaurant 33 X 15 11 X 4 & 11 X 6 Seating 58 CT/O C3 SP SK H1 R2 F2 WH S1 66 ft. B = Beverage Area R = Refrigerator (blue walk in C = Counter S = Sink; S1 Hand; S2 3 Pot; S3 Bar CT = 4 burner plus flat top over ovens SK= Steam Kettle DW = Dishwasher SP = Salad/cold Prep table F = Freezer (blue walk in) H1 = Hot Prep Table with Heat Lamp Shelf

Window Values Table 2A in Manual N (Fenestration) 1c-cuf-c Double pane, fixed sash, Metal no Break Front Glass Window 20 ft. wide and 8 ft. high Plus Front Glass Door 3 ft. wide.

Window Square footage? Using the 20ft by 8ft window measurements, what is the square footage of the window? 20 ft. × 8 ft. = 160 ft2

Roof/Ceiling Table 4 A 17-A-15m Metal deck plus R-15 board, no ceiling

Roof/Ceiling Table 4 A 17-A-15m Metal deck plus R-15 board, no ceiling

Roof/Ceiling Table 4 A 17-A-15m Metal deck plus R-15 board, no ceiling R-15 Board Plus Roofing Cover/Membrane

Roof/Ceiling Based on the building being 25 ft. wide by 66 ft. long, what is the square footage of the roof’s surface? 25 × 66 = 1,650

Above Grade Walls From Manual N Table 4A: 13 CB – Framing with R-13 in 2 × 4 Stud Cavity, No Board Insulation, Any Exterior Finish, Open Core Plus Interior Finish Block Walls Any Exterior Finish

Above Grade Walls From Manual N Table 4A: 13 CB – Framing with R-13 in 2 × 4 Stud Cavity, No Board Insulation, Any Exterior Finish, Open Core Plus Interior Finish 2 X 4 Stud Cavity

Above Grade Walls From Manual N Table 4A: 13 CB – Framing with R-13 in 2 × 4 Stud Cavity, No Board Insulation, Any Exterior Finish, Open Core Plus Interior Finish R-13 Insulation

Above Grade Walls From Manual N Table 4A: 13 CB – Framing with R-13 in 2 × 4 Stud Cavity, No Board Insulation, Any Exterior Finish, Open Core Plus Interior Finish Drywall

Above Grade Walls From Manual N Table 4A: 13 CB – Framing with R-13 in 2 × 4 Stud Cavity, No Board Insulation, Any Exterior Finish, Open Core Plus Interior Finish 13 CB-0fc Block, Framing w/R-13 cavity, drywall

Back Door Core Table 4A in Manual N 11 J Metal, Fiberglass Core Generally Some Wood for Strength/Attaching

Back Door Cover 11 J Metal, Fiberglass Core Metal Cover Front

Floor Table 4 A Manual N 22-B-10pm Slab on grade, 2” Edge Insulation Heavy Dry or Light Wet Soil Concrete Slab Block Wall Footer R 10 Insulation Board (3 ft. down)

Back Door Frame 11 J Metal, Fiberglass Core Door and Frame One Piece (Outside View)

Window Values Table 2A in Manual N 1c-cuf-c Double pane, fixed sash, Metal no Break

Window Values Question 1 What are the table values for the solar heat gain coefficient and U-Value for a Single Pain ¼” fixed sash window. SHGC = 0.74 & U-Value 1.13

Window Values Question 2 What are the table values for the solar heat gain coefficient and U-Value for a Double Pain fixed sash Wood or wood clad window. SHGC = 0.61 & U-Value 0.56

Window Values Question 2 Which of the previous two windows will allow less heat to transfer through it? The one with the lower U-Value and SHGC the Double Pain fixed sash Wood or wood clad window

Window Values Table 2A in Manual N 1c-cuf-c Double pane, fixed sash, Metal no Break

Window Values Question 3 First, find the square ft. of filter area: 9 inches divided by 12 inches equals the percentage of a foot (0.75) Calculate the front door’s square footage using the information on this page. First, find the square ft. of filter area: 9 inches divided by 12 inches equals the percentage of a foot (0.75) Second, find the square feet by multiplying the width times the height: 3ft. × 6.75 ft. = 20.25 ft2.

Field Notes In the summer the southwest side of building always ran hot in the afternoon, and the southeast side ran warm in the mornings. Over a ten year period, many technician’s had been called, and in turn had visited the building to no avail. The report always came back the same, the HVAC is working properly and you already have the maximum airflow available to those areas. Finally one technician asked to see the building’s plans. The technician discovered that to cut corners the builder had substituted a double pane aluminum window with no break, for the specified triple pane fiberglass frame windows. Thus, the HVAC system was not sized and installed for the as built building conditions, and could not meet the added load requirements. The final result was a reflective film was added to the windows on the south side of the building and the system began keeping the occupants comfortable in the summer for the first time in a decade.