ASHRAE Journal - December 2009 - 58

ASHRAEOffices 1 2 3 4 5 6 7 8 Building cost ($) Operating Equipment, Utilities and Supplies ($) Cost of Year-Round Air-Conditioning System ($) Air-Recovery System Owning Cost ($) Air-Recovery System Operating Cost ($) Air-Recovery System Owning & Operating Costs ($) Cleaning & Decorating Costs ($) Percent Reduction in Cleaning & Decorating Costs Required to Pay for an Air-Recovery System ($) Salaries & Wages (including Fringe Costs) ($) Percent of Absenteeism Salaries & Wages or Work Time Lost Because of Absenteeism ($) Percent Reduction in Absenteeism Required to Pay for an Air-Recovery System Percent Reduction in Absenteeism & Cleaning & Decorating Costs to Pay for Air-Recovery System 2.91 2.00 0.518 0.0161 0.00874 0.025 0.545 4.6 Hospitals 5.56 19.80 0.707 0.0161 0.01991 0.036 1.09 3.3 59–2009 YE A R S JOURNAL Hotels 3.47 1.90 0.797 0.0161 0.01991 0.036 0.919 3.9 Stores 2.25 4.00 0.368 0.0161 0.00908 0.025 0.545 4.6 Schools 2.21 0.32 0.221 0.0161 0.00391 0.022 0.426 5.2 Colleges 2.41 0.23 0.258 0.0161 0.00814 0.024 0.449 5.4 Factories 1.92 7.05 0.418 0.0161 0.00871 0.025 0.299 8.3 9 10 11 12 66.00 2.72 1.80 1.4 26.94 2.8 0.754 4.8 36.10 3.4 1.23 2.0 3.42 2.72 0.093 38.7 10.00 2.72 0.272 9.2 6.52 3.14 0.204 10.8 7.15 2 0.143 16.8 1.1 1.9 1.6 3.5 3.1 3.5 4.1 Table 2 Typical annual owning and operating costs per square foot. parisons. While these costs may be roughly equal to a conventional system, an air-recovery system will also add other benefits. While many of these advantages have a measurable economic value, others, though desirable, cannot be assigned a definite dollar cost. For these the engineer and his client must consider the benefits on a subjective basis. The economic advantages of clean air may take many forms: fewer rejects in a food-processing plant; lowered possibility of infection in a hospital; lessened cleaning expense in a commercial building. • A midwest bank pays out $175,000 annually for interior cleaning including $12,500 for washing windows on the inside, $10,000 for cleaning walls so they can be repainted. Clean air would obviate much of this expense. 58 ASHRAE Journal • Department stores write off up to $500,000 annually for soiled merchandise, even when dustcovers cover counters every night. • An exhaustive study by the Building Owners and Managers Association shows over 54 cents a sq ft yearly is spent just to keep office areas clean enough for occupancy. (This 54 cents is 23 percent of the entire operating cost for office buildings.) Unclean air costs money in many ways not so directly traceable. A portion of absentee losses, lowered or inferior production as well as decreased lighting efficiencies; periodic air-duct cleaning, objectionable tobacco smoke and other subordinate costs, must be charged to air-borne dirt, which could be eliminated. Air-conditioning engineers have developed a worksheet (Table 2) to a s h r a e. o rg compute the potential savings using an air-recovery system for seven major classes of buildings—offices, hospitals, factories, hotels and motels, department stores, schools and colleges. In this worksheet only savings from reduced cleaning and decorating expenses and reduced absenteeism are figured. For specific buildings there probably will be additional savings that will be even greater than these. Such savings depend on the individual building use (a food-processing plant needs to be cleaner than a foundry) and therefore the total potential savings. Line 1 is cost of a typical building on an annual square foot basis, amortized over 40 yr at 5 percent interest, with 1 percent set aside for insurance and an additional 1 percent for taxes. Cost figures are based on U.S. averages. December 2009

ASHRAE Journal - December 2009

Table of Contents for the Digital Edition of ASHRAE Journal - December 2009

ASHRAE Journal - December 2009
Contents
Commentary
Industry News
Letters
Meetings and Shows
ASHRAE Building EQ Program
Feature Articles
A Closer Look at Chiller Ratings
Cooling With Less Air: Using Underfloor Air Distribution and Chilled Beams
Cooling Concrete: Containerized Water Chilling Plant
Geothermal for Community Center
Anniversary Feature: Air-Recovery System Versus Conventional Air Conditioning
Technical Topics
New Product Preview
Products
Emerging Technologies
Washington Report
People
Special Products
2009 Feature Articles Indices
Classified Advertising
Advertisers Index
ASHRAE Journal - December 2009 - ASHRAE Journal - December 2009
ASHRAE Journal - December 2009 - Cover2
ASHRAE Journal - December 2009 - 1
ASHRAE Journal - December 2009 - 2
ASHRAE Journal - December 2009 - Contents
ASHRAE Journal - December 2009 - 4
ASHRAE Journal - December 2009 - Commentary
ASHRAE Journal - December 2009 - Industry News
ASHRAE Journal - December 2009 - 7
ASHRAE Journal - December 2009 - 8
ASHRAE Journal - December 2009 - 9
ASHRAE Journal - December 2009 - 10
ASHRAE Journal - December 2009 - Letters
ASHRAE Journal - December 2009 - 12
ASHRAE Journal - December 2009 - 13
ASHRAE Journal - December 2009 - 14
ASHRAE Journal - December 2009 - 15
ASHRAE Journal - December 2009 - Meetings and Shows
ASHRAE Journal - December 2009 - 17
ASHRAE Journal - December 2009 - Feature Articles
ASHRAE Journal - December 2009 - 19
ASHRAE Journal - December 2009 - 20
ASHRAE Journal - December 2009 - 21
ASHRAE Journal - December 2009 - A Closer Look at Chiller Ratings
ASHRAE Journal - December 2009 - 23
ASHRAE Journal - December 2009 - 24
ASHRAE Journal - December 2009 - 25
ASHRAE Journal - December 2009 - 26
ASHRAE Journal - December 2009 - 27
ASHRAE Journal - December 2009 - 28
ASHRAE Journal - December 2009 - 29
ASHRAE Journal - December 2009 - 30
ASHRAE Journal - December 2009 - 31
ASHRAE Journal - December 2009 - 32
ASHRAE Journal - December 2009 - 33
ASHRAE Journal - December 2009 - Cooling With Less Air: Using Underfloor Air Distribution and Chilled Beams
ASHRAE Journal - December 2009 - 35
ASHRAE Journal - December 2009 - 36
ASHRAE Journal - December 2009 - 37
ASHRAE Journal - December 2009 - 38
ASHRAE Journal - December 2009 - 39
ASHRAE Journal - December 2009 - 40
ASHRAE Journal - December 2009 - 41
ASHRAE Journal - December 2009 - Cooling Concrete: Containerized Water Chilling Plant
ASHRAE Journal - December 2009 - 43
ASHRAE Journal - December 2009 - 44
ASHRAE Journal - December 2009 - 45
ASHRAE Journal - December 2009 - 46
ASHRAE Journal - December 2009 - 47
ASHRAE Journal - December 2009 - Geothermal for Community Center
ASHRAE Journal - December 2009 - 49
ASHRAE Journal - December 2009 - 50
ASHRAE Journal - December 2009 - 51
ASHRAE Journal - December 2009 - Anniversary Feature: Air-Recovery System Versus Conventional Air Conditioning
ASHRAE Journal - December 2009 - 53
ASHRAE Journal - December 2009 - 54
ASHRAE Journal - December 2009 - 55
ASHRAE Journal - December 2009 - 56
ASHRAE Journal - December 2009 - 57
ASHRAE Journal - December 2009 - 58
ASHRAE Journal - December 2009 - 59
ASHRAE Journal - December 2009 - 60
ASHRAE Journal - December 2009 - 61
ASHRAE Journal - December 2009 - Technical Topics
ASHRAE Journal - December 2009 - 63
ASHRAE Journal - December 2009 - 64
ASHRAE Journal - December 2009 - New Product Preview
ASHRAE Journal - December 2009 - 66
ASHRAE Journal - December 2009 - 67
ASHRAE Journal - December 2009 - 68
ASHRAE Journal - December 2009 - 69
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ASHRAE Journal - December 2009 - 112
ASHRAE Journal - December 2009 - 113
ASHRAE Journal - December 2009 - Products
ASHRAE Journal - December 2009 - 115
ASHRAE Journal - December 2009 - 116
ASHRAE Journal - December 2009 - Emerging Technologies
ASHRAE Journal - December 2009 - Washington Report
ASHRAE Journal - December 2009 - 119
ASHRAE Journal - December 2009 - People
ASHRAE Journal - December 2009 - Special Products
ASHRAE Journal - December 2009 - 2009 Feature Articles Indices
ASHRAE Journal - December 2009 - 123
ASHRAE Journal - December 2009 - 124
ASHRAE Journal - December 2009 - 125
ASHRAE Journal - December 2009 - Classified Advertising
ASHRAE Journal - December 2009 - 127
ASHRAE Journal - December 2009 - Advertisers Index
ASHRAE Journal - December 2009 - Cover3
ASHRAE Journal - December 2009 - Cover4
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