[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-detail-656617-en":59,"doc-seo-656617-105":80},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":5,"data":60},{"doc_id":61,"user_id":62,"nickname":63,"user_avatar":64,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":66,"doc_content":67,"file_id":68,"file_url":69,"file_type":70,"file_size":71,"view_count":24,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":29,"language":72,"language_code":73,"site_id":74,"html_lang":73,"table_of_contents":75,"faqs":76,"seo_title":77,"seo_description":66,"update_tm":78,"read_time":79},656617,962094248482,"naya.afterrain","https://ap-avatar.wpscdn.com/davatar_9964176cb1d06d4a9deccf72a44ae3dc","Piping Diagram - AHU with Tankless Water Heater Hybrid Space Heating Application","Piping diagram set for air handling unit (AHU) heating and domestic hot water (DHW) layouts, focusing on hybrid and space-heating configurations. Illustrations show component integration such as tankless water heaters and boilers, outdoor sensors, circulators with check valves, air purge or air eliminators, expansion tanks, anti-scald valves, and flow switches. Diagrams also cover tank water heater variants and combi boiler setups, plus iFLOW AHU pairings with NPE-A2 series water heaters using internal or external recirculation to manage hot water supply and cold-water return routing.","| Piping Diagram | AHU with Tankless Water Heater Hybrid Space Heating Application | |\n| --- | --- | --- |\n\nTankless Water Heater  \nOutdoor Sensor  \nHeat Pump  \n|  |\n| --- |\n|  |\n\nCirculator with  \nCheck Valve  \nAir Purge Valve  \nExpansion Tank  \nMK2  \nM1 M4  \nC1  \nT2  \nK4 K3 K5  \nR45 R235 R5R2 7 58 R238 R62 R239  \nDHW  \nAnti Scald Valve  \nCheck Valve  \nFlow Switch  \nCold Water  \n\n| Piping Diagram | AHU with Tank Water Heater Hybrid Space Heating Application | |\n| --- | --- | --- |\n\nDHW  \n2  \nM1 M4  \nC1  \nT2  \nK4 K3 K5  \nR45 R235 R5R2 7 58 R238 R62 R239  \nOutdoor Sensor  \nAir Elliminator  \nExpansion Tank  \nCirculator with  \nCheck Valve  \nAir Purge Valve  \nFlow Switch  \nCold Water  \nHeat Pump  \nAnti Scald Valve  \n|  |\n| --- |\n| |\n\n| Piping Diagram | AHU with Tankless Water Heater Space Heating Application | |\n| --- | --- | --- |\n\nTankless Water Heater  \nAir Elliminator  \nCirculator with Check Valve  \nDHW  \nAnti Scald Valve  \nCheck Valve  \nAir Purge Valve  \nFlow Switch  \nCold Water  \nExpansion Tank  \n\n| Piping Diagram | AHU with Tank Water Heater Space Heating Application | |\n| --- | --- | --- |\n\nDHW  \nAir Elliminator  \nCirculator with  \nCheck Valve  \nAnti Scald Valve  \nCheck Valve  \nAir Purge Valve  \nCold  \nWater  \nExpansion Tank  \nTank Water Heater  \n2  \nM1 M4  \nC1  \nT2  \nK4 K3 K5  \nR45 R235 R5R2 7 58 R238 R62 R239  \n| Piping Diagram | AHU with Tankless Boiler Space Heating Application | |\n| --- | --- | --- |\n\nBoiler  \nAir Elliminator  \nM  \nM  \nK4 K3 K5  \nR R235 R R237 R58 R R R239  \nM  \nM  \nM  \nCirculator  \nMake up Water Feeder  \nExpansion Tank  \n\n| Piping Diagram | AHU with Combi Boiler Space Heating Application | |\n| --- | --- | --- |\n\nTankless Combi Boiler  \nExpansion Tank  \nMake up Water Feeder  \nCold Water  \nDHW  \n| Piping Diagram | iFLOW AHU & NPE-A2 with Internal Recirculation | |\n| --- | --- | --- |\n\nNPE-A2 Series Water Heater  \nCommunication Cable  \nDHW Supply  \nCold Water Supply  \n| Piping Diagram | iFLOW AHU & NPE-A2 with External Recirculation | |\n| --- | --- | --- |\n\nNPE-A2 Series Water Heater  \nCommunication Cable  \nDHW Cold Water External Supply Supply Recirculation  \n[iFLOW HVAC INC. 5 ](iFLOW HVAC INC. 5  www.iflowhvac.com)[ www.iflowhvac.com](iFLOW HVAC INC. 5  www.iflowhvac.com)  \n| Piping Diagram | iFLOW AHU & NPE-A2 | |\n| --- | --- | --- |\n\nNPE-A2 Series Water Heater  \n| Piping Diagram | iFLOW AHU & NPE-S2 | |\n| --- | --- | --- |\n\nThermostat NPE-S2 Series  \n[iFLOW HVAC INC. 6 ](iFLOW HVAC INC. 6  www.iflowhvac.com)[ www.iflowhvac.com](iFLOW HVAC INC. 6  www.iflowhvac.com)","cbCaimManBgN67Zt","https://ap.wps.com/l/cbCaimManBgN67Zt","pdf",2061087,"English","en",105,"# Piping Diagrams Overview\n## AHU with Tankless Water Heater Hybrid Space Heating Application\n## AHU with Tank Water Heater Hybrid Space Heating Application\n## AHU with Tankless Water Heater Space Heating Application\n## AHU with Tank Water Heater Space Heating Application\n## AHU with Tankless Boiler Space Heating Application\n## AHU with Combi Boiler Space Heating Application\n## iFLOW AHU & NPE-A2 with Internal Recirculation\n## iFLOW AHU & NPE-A2 with External Recirculation\n## iFLOW AHU & NPE-S2","[{\"question\":\"What main components are shown across the AHU piping diagrams?\",\"answer\":\"The diagrams commonly include DHW and cold water lines plus equipment such as circulators with check valves, air purge/air eliminators, expansion tanks, anti-scald valves, and flow switches, along with outdoor sensors or related controls depending on the layout.\"},{\"question\":\"How do the tankless and tank water heater space-heating applications differ?\",\"answer\":\"Tankless configurations pair the AHU piping with a tankless water heater, while tank configurations incorporate a tank water heater and adjust the connected DHW and return routing accordingly, while retaining key safety and air-management components.\"},{\"question\":\"What is the difference between internal and external recirculation in iFLOW AHU \\u0026 NPE-A2 diagrams?\",\"answer\":\"The internal recirculation diagram routes the DHW and cold-water recirculation through the integrated system path, while the external recirculation diagram shows an external recirculation supply/return arrangement for the same NPE-A2 series water heater.\"}]","Piping Diagram - AHU with Tankless Water Heater Hybrid Space Heating Application | PDF",1792969658,15,{"code":4,"msg":81,"data":82},"ok",{"site_id":74,"language":73,"slug":83,"title":65,"keywords":84,"description":66,"schema_data":85,"social_meta":139,"head_meta":141,"extra_data":143,"updated_unix":78},"piping-diagram-ahu-with-tankless-water-heater-hybrid-space-heating-application","",{"@graph":86,"@context":138},[87,101,121],{"@type":88,"itemListElement":89},"BreadcrumbList",[90,94,96,99],{"item":91,"name":92,"@type":93,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":95,"name":9,"@type":93,"position":14},"https://docshare.wps.com/document/",{"item":97,"name":30,"@type":93,"position":98},"https://docshare.wps.com/document/technology/",3,{"item":100,"name":65,"@type":93,"position":19},"https://docshare.wps.com/document/piping-diagram-ahu-with-tankless-water-heater-hybrid-space-heating-application/656617/",{"url":100,"name":65,"@type":102,"image":103,"author":108,"headline":65,"publisher":110,"fileFormat":113,"inLanguage":73,"description":66,"dateModified":114,"datePublished":115,"encodingFormat":113,"isAccessibleForFree":116,"interactionStatistic":117},"DigitalDocument",{"url":104,"@type":105,"width":106,"height":107},"https://docshare.wps.com/thumbnails/piping-diagram-ahu-with-tankless-water-heater-hybrid-space-heating-application/656617.png","ImageObject",300,407,{"name":63,"@type":109},"Person",{"url":91,"name":111,"@type":112},"DocShare","Organization","application/pdf","2026-11-03","2026-10-25",true,{"@type":118,"interactionType":119,"userInteractionCount":24},"InteractionCounter",{"@type":120},"ViewAction",{"@type":122,"mainEntity":123},"FAQPage",[124,130,134],{"name":125,"@type":126,"acceptedAnswer":127},"What main components are shown across the AHU piping diagrams?","Question",{"text":128,"@type":129},"The diagrams commonly include DHW and cold water lines plus equipment such as circulators with check valves, air purge/air eliminators, expansion tanks, anti-scald valves, and flow switches, along with outdoor sensors or related controls depending on the layout.","Answer",{"name":131,"@type":126,"acceptedAnswer":132},"How do the tankless and tank water heater space-heating applications differ?",{"text":133,"@type":129},"Tankless configurations pair the AHU piping with a tankless water heater, while tank configurations incorporate a tank water heater and adjust the connected DHW and return routing accordingly, while retaining key safety and air-management components.",{"name":135,"@type":126,"acceptedAnswer":136},"What is the difference between internal and external recirculation in iFLOW AHU & NPE-A2 diagrams?",{"text":137,"@type":129},"The internal recirculation diagram routes the DHW and cold-water recirculation through the integrated system path, while the external recirculation diagram shows an external recirculation supply/return arrangement for the same NPE-A2 series water heater.","https://schema.org",{"og:url":100,"og:type":140,"og:title":65,"og:site_name":111,"og:description":66},"article",{"robots":142,"canonical":100},"index,follow",{"doc_id":61,"site_id":74}]