Building Services Engineering 5th Edition Handbook

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Surface-water drainage 227 30 m 18 m Tarmacadam surface laid to fall towards drainage slots Slotted concrete drainpipes Cleanable silt trap 2m × 2 m soakaway pit Car park surface Precast concrete slotted drainage pipe 8.1 Surface-water drainage for the car park in Example 8.4. Volume to be stored = 15 mm h = 81 m 3 1m × 2h× 10 3 × 100 m × 30 m × 0.9 mm Pits 2.25 m deep will have diameters of 2 m. Therefore: Pit volume = π × 22 4 and hence, number of pits = 81 7.07 = 12 × 2.25 m 3 = 7.07 m 3 Figure 8.1 shows a suitable arrangement of precast concrete slot drainage channels and soakaway pits. Questions 1. Explain how the rainwater flow load is calculated for roof and groundwater drainage system design. 2. A housing estate has footpaths and roads covering an area of 4000 m 2 . Calculate the rainwater flow load and the number of drain gullies required. 3. Find the flow load for a flat roof of dimensions 20 m × 12 m. 4. Find the flow load for a roof of dimensions 10 m × 4 m with a pitch of 52 ◦ . 5. Calculate the flow capacity of a level half-round gutter 125 mm wide. Ignore friction. 6. Calculate the flow capacity of a level box gutter 200 mm wide and 150 mm deep when running full. Ignore friction.
228 Surface-water drainage 7. A PVC half-round gutter 150 mm wide slopes at 1 in 600 and has an end outlet to a rainwater pipe. The water depth at the outlet is half the gutter depth. Assume that A o is half the gutter cross-sectional area. Take W as the gutter width. Calculate the gutter flow capacity. 8. A house has two sloping roofs, each side of a ridge, of dimensions 15 m × 8 m. Calculate the flow load and determine the gutter and rainwater pipe design from Table 8.2. 9. The flat roof of a school is to be of dimensions 30 m × 20 m with a rectangular gutter on each long side and sloping at 1 in 600 to an outlet at each end. Calculate suitable dimensions for the gutter. 10. A pitched roof of dimensions 20 m × 5 m drains into a level box gutter 120 mm wide and 80 mm deep on one long side. The gutter has one end outlet. Calculate whether this is a satisfactory arrangement. 11. Describe the actions taken during the design and construction of a surface-water disposal system, stating what options are investigated. 12. Storage soakaway pits 2 m deep are to be used to dispose of rainwater from a roof of dimensions 10 m × 8 m. Determine a suitable size and number of pits. 13. List the techniques used for subsoil drainage systems. 14. Describe the features and maintenance requirements of surface-water drainage systems for car parking, garage forecourts and large paved areas in shopping centres.
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Building Services Engineering
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Building Services Engineering Fifth
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Contents Preface to fifth edition A
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Contents vii Sick building syndrome
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Contents ix Circuit design 294 Cabl
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Preface to fifth edition Building S
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Acknowledgements I am particularly
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Units and constants xv Table 2 Mult
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Symbols xvii Symbol Description Uni
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Symbols xix Symbol Description Unit
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2 Built environment Introduction Th
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4 Built environment Ventilation The
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6 Built environment (a) At full occ
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8 Built environment Table 1.2 Compa
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10 Built environment Because of the
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12 Built environment Visual display
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14 Built environment v = 7 m/s t a
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16 Built environment 1.4 Sling psyc
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18 Built environment 1.7 Thermistor
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20 Built environment t res = t g (1
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22 Built environment great care wit
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24 Built environment 16. An hotel l
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26 Built environment 37. Are any of
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28 Built environment building has a
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30 Built environment 73. What was t
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32 Energy economics Introduction Bu
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34 Energy economics 16. air-to-air
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36 Energy economics 1 kWh = 1 kWh
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38 Energy economics 2. Heat transfe
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40 Energy economics For solid fuel
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42 Energy economics gas cost = 1.80
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44 Energy economics Table 2.5 Carbo
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46 Energy economics EXAMPLE 2.8 A h
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48 Energy economics annual cost = u
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50 Energy economics EXAMPLE 2.12 Ex
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52 Energy economics l = 0.035 ( 1 0
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54 Energy economics Table 2.11 Valu
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56 Energy economics From Table 2.4
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58 Energy economics 3. Minimum outs
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3 Heat loss calculations Learning o
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62 Heat loss calculations Table 3.1
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64 Heat loss calculations Table 3.6
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66 Heat loss calculations Where onl
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68 Heat loss calculations The venti
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70 Heat loss calculations The surro
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72 Heat loss calculations The speci
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74 Heat loss calculations where R m
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76 Heat loss calculations The addit
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78 Heat loss calculations operation
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80 Heat loss calculations 2. The fo
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82 Heat loss calculations internal
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84 Heat loss calculations 27. Which
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86 Heating Key terms and concepts a
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88 Heating 4.2 Electrically heated
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90 Heating Sheet steel case Removab
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92 Heating Floor finish Screed with
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94 Heating Flue Return air plenum F
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96 Heating Table 4.1 Classification
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98 Heating Table 4.2 Heat output fr
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100 Heating Table 4.3 Flow of water
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102 Heating and, maximum available
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104 Heating This means that one vol
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106 Heating Performance testing A r
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108 Heating Electrical power genera
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110 Heating Combined heat and power
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112 Heating 3. A building energy ma
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114 Heating Connections are made to
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116 Heating remotely the MWh consum
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118 Heating 13. The two-pipe heatin
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120 Heating 27. Which is not correc
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122 Heating 39. Which of these is t
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124 Heating 4. Heat supplied is cha
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126 Ventilation and air conditionin
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Page 197 and 198: 176 Ventilation and air conditionin
Page 199 and 200: 6 Hot- and cold-water supplies Lear
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Page 203 and 204: 182 Hot- and cold-water supplies po
Page 205 and 206: 184 Hot- and cold-water supplies Ce
Page 207 and 208: 186 Hot- and cold-water supplies st
Page 209 and 210: 188 Hot- and cold-water supplies 0.
Page 211 and 212: 190 Hot- and cold-water supplies 53
Page 213 and 214: 192 Hot- and cold-water supplies an
Page 215 and 216: 194 Hot- and cold-water supplies Ta
Page 217 and 218: 196 Hot- and cold-water supplies Ta
Page 219 and 220: 198 Hot- and cold-water supplies (a
Page 225 and 226: 204 Hot- and cold-water supplies 49
Page 227 and 228: 206 Soil and waste systems Introduc
Page 229 and 230: 208 Soil and waste systems Open to
Page 231 and 232: 210 Soil and waste systems 7. Bends
Page 233 and 234: 212 Soil and waste systems The inte
Page 235 and 236: 214 Soil and waste systems 40 mm wa
Page 237 and 238: 216 Soil and waste systems Table 7.
Page 239 and 240: 218 Soil and waste systems 50 mm ve
Page 241 and 242: 220 Soil and waste systems 3. Long
Page 243 and 244: 222 Surface-water drainage Table 8.
Page 245 and 246: 224 Surface-water drainage Rectangu
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Page 251 and 252: 230 Below-ground drainage Design ca
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Page 255 and 256: 234 Below-ground drainage From Fig.
Page 257 and 258: 236 Below-ground drainage storage v
Page 259 and 260: 238 Below-ground drainage 14. The f
Page 261 and 262: 240 Condensation in buildings mould
Page 263 and 264: 242 Condensation in buildings The w
Page 265 and 266: 244 Condensation in buildings EXAMP
Page 267 and 268: 246 Condensation in buildings This
Page 269 and 270: 248 Condensation in buildings Tempe
Page 271 and 272: 250 Condensation in buildings and,
Page 273 and 274: 252 Condensation in buildings EXAMP
Page 275 and 276: 254 Condensation in buildings Tempe
Page 277 and 278: 256 Condensation in buildings For t
Page 279 and 280: 258 Condensation in buildings 4. Ev
Page 281 and 282: 11 Lighting Learning objectives Stu
Page 283 and 284: 262 Lighting Table 11.1 Typical val
Page 285 and 286: 264 Lighting Light sources 9 9 9 Wi
Page 287 and 288: 266 Lighting Utilization factor The
Page 289 and 290: 268 Lighting From Table 11.3, for a
Page 291 and 292: 270 Lighting Table 11.4 Lamp data.
Page 293 and 294: 272 Lighting number of lamps = 12.8
Page 295 and 296: 274 Lighting 3. Sketch and describe
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278 Lighting 3. 800 lm/m 2 . 4. 260
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12 Gas Learning objectives Study of
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282 Gas Open to atmosphere Rubber p
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284 Gas EL = (1.25 × 34) m = 42.5
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286 Gas become exhausted. SNG will
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288 Gas are ignited and an air flow
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290 Gas 3. The pipe from a gas mete
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292 Electrical installations Key te
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294 Electrical installations curren
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296 Electrical installations 1 Volt
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298 Electrical installations power
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300 Electrical installations For1mm
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302 Electrical installations Table
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304 Electrical installations Incomi
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306 Electrical installations energi
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308 Electrical installations Starte
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310 Electrical installations Ethyle
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312 Electrical installations Test o
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314 Electrical installations Joint
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316 Electrical installations 4. 100
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318 Electrical installations 39. Wh
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320 Electrical installations 51. Wh
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322 Room acoustics 20. understand t
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324 Room acoustics pump blades and
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326 Room acoustics ceiling, Q is 4.
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328 Room acoustics Table 14.2 Solut
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330 Room acoustics Table 14.3 Fan s
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332 Room acoustics Table 14.4 Illus
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334 Room acoustics (Sound Research
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336 Room acoustics The target room
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338 Room acoustics Table 14.6 Noise
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340 Room acoustics 100 90 80 70 Sou
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342 Room acoustics 24. A forced-dra
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344 Room acoustics The room directi
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346 Room acoustics 3. Multiple sour
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348 Room acoustics 55. Which is not
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350 Fire protection computer monito
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352 Fire protection halogen gas, wh
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354 Fire protection the reach of tu
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356 Fire protection Range pipe Spri
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358 Fire protection Fire compartmen
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360 Fire protection 16. Which are c
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362 Plant and service areas Key ter
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364 Plant and service areas 2.0 1.5
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366 Plant and service areas Fuel st
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368 Plant and service areas a minim
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370 Plant and service areas An unde
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372 Plant and service areas Air cha
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374 Plant and service areas 100 mm
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376 Plant and service areas Fire co
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378 Plant and service areas Table 1
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380 Plant and service areas 11. Wha
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17 Mechanical transportation Learni
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384 Mechanical transportation Table
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386 Mechanical transportation Crowd
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388 Mechanical transportation Hydra
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390 Mechanical transportation 4. Co
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18 Question bank Learning objective
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394 Question bank 8. Which correctl
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396 Question bank 5. This building
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398 Understanding units Questions 1
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400 Understanding units 15. Which i
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402 Understanding units 29. Which o
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404 Understanding units 43. Which i
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Appendix: answers to questions Chap
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408 Appendix Chapter 3 Heat loss ca
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410 Appendix 4. 0.007469 kg H 2 O/k
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412 Appendix 32. 5 33. 5 34. 3 35.
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414 Appendix 23. Lighting 1200 h/ye
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416 Appendix 27. 37 dB. 28. 39 dB.
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418 Appendix 15. 5 16. 2 17. 5 18.
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References Action Energy, Departmen
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Index Absorption 154, 324 Absorptio
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424 Index Gas burner controls 289 G
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426 Index Sensible heat gains 137 S
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