好耐冇寫過野, 襯呢個假期有少少空擋就想將最近做緊既野分享下比大家, 亦都祝大家有個好既2023年.

今日想講既就係點去Plan發電機煙通既Routing, 利申唔一定100%啱, 因爲好多都係跟Project Reference同本人對EPD (Environmental Protection Department, 環保處) Guideline既演繹去計劃, EPD自己一向講法都係Case-by-case, 姐係就算有Project Reference, 都可以有機會唔Applicable係你單Project. 所以帶定頭盔先, 唔一定跟足呢篇文寫既野就100%會過到EPD. 但呢篇文所寫既野理應係跟足EPD Guidelines, 所以跟左係大大提升EPD Approval既機會.

首先, 我地要搞清楚油缸自己本身條煙通同發電機自己條煙通先, 呢2條係唔同Party睇, 個Requirement都唔同. Fuel Tank條Flue Pipe係HKFSD睇, Exhaust Outlet 1.5m範圍内唔可以有窗/Louvre. (最新DG Guideline好似係話1.5m範圍下面都唔可以有電氣野, 如果有要轉防爆. 但呢家仲係Grace Period, 所以我冇去深究) 至於Generator Flue Pipe (Chimney), 就係EPD睇, Chimney Outlet 5m範圍裏面唔可以有窗/Louvre.

EPD對發電機同煙通主要有以下既Requirement:

  1. https://www.epd.gov.hk/epd/sites/default/files/epd/english/environmentinhk/air/guide_ref/files/guidelines_for_e_generator.pd

咁我就簡單列左堆重點出黎同大家講:

  1. 首先係2.1, 如果你係打算裝一部發電機, 而部發電機係會用多過25L油的話, 你要至少係安裝前28日入曬所有相關資料(Guideline裏面既 3(a)-(e), (h)-(k))比EPD去攞Approval. 25L呢個數字係咩概念? 正常300 kVA Genset都已經用緊 87L/hr, 而300 kVA Genset亦都已經好細, 所以相信所有New Build既Genset都要入比EPD.
  2. 其次就係3(e), 呢句就係要係所有Chimney既Outlet畫一個5m既圓圈, 呢個圓圈入面唔可以有任何窗/開到既門, 同Intake Louvre. 有人問過Exhaust Louvre計唔計, 我自己就冇試過亦都唔覺得要冒險, 但如果真係就唔到我覺得可以入比EPD睇下批唔批. 呢段後半段都好重要, 就係煙通Outlet要係Unobstructed, 姐係上面唔可以有野擋住(例如Canopy/Building Undercover).
  3. 最後就係3(g), 亦都係好多人有問題既位. 因爲咁我覺得有必要Cap句野出黎警世.

(g) if the chimney is located on an unoccupied podium/roof, it should be at a
minimum distance of 3m above the parapet wall of the podium or the highest
point of any structure on the podium/roof. For an occupied podium, the 3m
should be measured from the top of the occupied structure or the highest point of
any structure on the podium/roof. In case the ventilation is good and the
emission is unlikely to cause any air pollution, the exhaust outlet may be allowed
at lower level but a minimum distance of 5m above ground should be complied
with;

呢句其實就係講, 如果條煙同射到上天台的話, 而個天台唔係平常人去到的話, 咁條煙通個Outlet位就一係要高過天台既Parapet Wall 3m 或者 高過最高點. 但係如果個天台係平常人都去到的話, 咁條煙通個Outlet位要高過最高點3m. 但係如果條煙通唔係係天台而係係Building某一個位射出黎的話, 咁就要確保唔會製造到空氣污染同個Chimney Outlet至少要離地5m.

以下係我以前其中一單Project既Chimney Outlet Location:

藍色線係Roof, 而紅色線就係Building最高點, 由圖可見, Chimney Outlet係高過最高點少少. Routing方面, 本身部發電機就係地下, 我地就同積師夾個Duct位, 貫穿曬全棟樓直接上到天台, 而條煙通就係經過呢個Duct位入上天台. 呢個Arrangement入過比EPD, 亦都approved左.

但係你可能仲會有以下幾個問題 –

疑問1: EPD唔係話要高過最高點3m咩?點解你高過最高點就OK.

答: 如果係Unoccupied Roof, 高過最高點就得. 相反, 如果係Occupied Roof, 就有機會比EPD叫你高過最高點3m. 我估計係EPD驚如果Roof積聚太多煙而又有人會行上黎的話, 會對人做成健康影響, 所以先分左Occupied Roof 同 Unoccupied Roof.

疑問2: 咁係咪一定要噴上Roof?唔可以低位出?

答: 唔一定, 我呢家做緊一單就係離地5m噴, 但未入EPD, 所以唔答得實. 但係官方答案就係: EPD會Case-by-case咁睇, 你要有心裏準備EPD隨時可以叫你射翻上Roof. 至於咩係”Ventilation is good and the emission is unlikely to cause air pollution”, 我都唔係好知EPD Officer用咩標準睇. 所以如非必要, 最好都係噴翻上Roof.

疑問3: 點分Occupied/Unoccupied Roof?

答: 要問積師/業主

所以正常Plan Routing既過程就會係咁:

  1. 定好發電機位置, 同積師研究煙通究竟射唔射到上Roof, 可以的話夾埋個煙通Duct位, 然後跳到第3步.
  2. 係離地5m既條件裏面揾一個合適既位置噴 (冇Canopy/Undercover既地方).
  3. 定Outlet既Level. 如果係Step 2就通常離地6m, 因爲要預1m裝個煙通帽. 如果係天台就要睇個個Roof係Occupied/Unoccupied. 如果Occupied就高過最高點3m, 如果係Unoccupied就高過最高點就得.

今次就講到呢度, 如果有問題可以再係Comment問, 新一年希望大家身體健康, 事事如意. 希望我呢一年既我冇咁忙, 可以投放多少少時間係呢個Blog到~

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