Lochinvar fire tube boiler


We just had a Lochinvar Noble Fire Tube Combi boiler installed today and it seems to be WAY overheating. The Lochinvar KNIGHT® boiler is now available in wall mounted units with an innovative new fire tube design. 25 million Btu/hr inputs. With three models ranging from 110,000 to 199,999 Btu/hr. The floors are uncomfortable to stand on, and the boiler keeps recycling from 140-165 F (Outlet). Benchmark Standard | AERCO2019-3-4 · Benchmark Standard 750 and 1000 commercial condensing boilers are the smallest size in the series handling load requirements of 750 to 1,000 MBH. With AHRI Thermal Efficiency up to 98%, FTXL™ fire tube boilers deliver tremendous savings on fuel costs. Select models provide up to 10:1 turndown, top and bottom water connections, and an upgraded SMART SYSTEM Control®. Click on the below products for more information  FTXL Fire Tube Boiler. The Boiler is manufactured with a corrosion-resistant stainless steel fire-tube heat exchanger and a negative regulation combustion system. Its troubleshooting system contributes to the quick and effective diagnostics and subsequently to repairs, which can be carried out on one`s one in the simplest cases. Lochinvar® has taken the fire-tube concept in an innovative new direction with the CREST® modulating-condensing boiler. 2 sq. Lochinvar FTXL Fire Tube Boiler Boiler Parts. At the time of the renovation, Lochinvar had just released its new FTXL™ Fire Tube Boiler. Residential Boilers … Combi Boiler. Noble Fire Tube Combi Boiler provides rapid, reliable hot water and efficient space heating. The KHN has: Direct vent capabilities to 100 feet Lochinvar Boiler Parts: BoilerWarehouse. Lochinvar. Developed to provide contractors with all of the options they need to serve every application, the new KNIGHT wall mount fire tube models are available in seven models with inputs from Lochinvar Boiler Parts. The high-efficiency condensing gas KNIGHT Fire Tube Boiler series first launched in 2005. Lochinvar’s CREST Condensing Boiler features fire-tube technology integrated with the exclusive SMART TOUCH operating control, allegedly offering engineers, mechanical contractors and building owners greater design flexibility and distinctive performance characteristics to meet today’s building Lochinvar’s CREST Condensing Boiler features fire-tube technology integrated with the exclusive SMART TOUCH operating control, allegedly offering engineers, mechanical contractors and building owners greater design flexibility and distinctive performance characteristics to meet today’s building The LochSPEC Water Heater Sizing Program™ is now a web-based application. See Lochinvar's revenue, employees, and funding info on Owler, the world's largest community-based business Lochinvar KNIGHT Fire Tube Boiler Series. My Lochinvar Knight boiler keeps locking out. The heat of the gases is transferred through the walls of the tubes by thermal conduction, heating the water and ultimately creating steam. Advanced user interface and controls with intuitive text display, simplifies boiler setup. For residential and light commercial applications, the FTXL™ adds models from 399,999 to 850,000 Btu/hr, and takes Lochinvar’s fire-tube technology to the next level. Cici Boiler Rooms stock replacement parts for Lochinvar Boilers. KNIGHT is recognized for its reliable, proven performance and high quality standards. Lochinvar's  Mar 13, 2017 Lochinvar LLC has released the NOBLE™ Fire Tube Combi Boiler. One company is recommending a Carrier Dunkirk 198,000 BTU while the other company is recommending a Lochinvar CBN215 215,000 BTU for $900 more. to 850,000 Btu/hr. The advanced KHN KNIGHT Boiler features a stainless steel fire-tube heat exchanger and offers AFUE of 95 percent across all models, which range from 55,000 to 285,000 Btu/hr. W. Lebanon TN 37090 Customer Assurance Inquiries (Equipment and Parts Order Inquiry) Lochinvar, LLC releases the NOBLE™ Fire Tube Combi Boiler for residential applications. Lochinvar is enhancing its top-performing high-efficiency condensing residential KNIGHT Fire Tube Boiler series with 95% DOE AFUE and advanced control functionality for optimized heating comfort. Lochinvar’s legendary reliability and performance are now available for apartments and homes, where the combi boiler’s next-generation fire tube design can provide hot water supply and space heating faster and more efficiently than ever before. Lochinvar, LLC announces the launch of its new FTXL™ Fire Tube Boiler for light commercial applications. , the Noble boiler offers easy installation and serviceability, true instantaneous response time and a user-friendly interface. The Noble fire tube combi boiler is a money-saving solution that delivers both hot water and comfortable space heating. The FTXL™ boiler is the new 98% efficiency standard in fire tube technology, and it puts remote connectivity at your fingertips. Product  Advanced Negative Regulation Technology; Fire-Tube Heat Exchanger The best option to step up from a traditional cast iron boiler to a high efficiency design. 2 percent thermal efficiency and up to 20:1 modulation turndown. SWIPE>> Here’s a quick look at the piping side of a simple combi-boiler install. Lochinvar’s KNIGHT® wall mount fire tube boiler ranges from 55,000 to 399,999 Btuh. is some variation of Lochinvar's Firetube boilers 9 times out of 10. Description: The new residential boiler line has 13 models from 55,000 to 399,000 Btuh, featuring high-efficiency 95 percent AFUE and advanced control functionality for optimized heating comfort. . Floor standing KNIGHT Fire Tube boiler makes its debut at 2016"s AHR Expo in Orlando. Below are just some of the many parts you can get from Cici Boiler Rooms. The system has been working great for the last 5 years. Lochinvar’s CREST Condensing Boiler features fire-tube technology integrated with the exclusive SMART TOUCH operating control, allegedly offering engineers, mechanical contractors and building owners greater design flexibility and distinctive performance characteristics to meet today’s building Lochinvar, LLC releases the NOBLE™ Fire Tube Combi Boiler for residential applications. “Lochinvar’s engineering team does not rest on the success of a great product, and the KNIGHT Fire Tube Boiler evolution is proof of our relentless push to improve performance for homeowners and make installation and set up a snap for contractors,” said Dan Rettig, residential product manager at Lochinvar. 6% low temp application efficiency, PVC venting, fully modulating burner with 5:1 turndown, and SMART SYSTEM control. With five models ranging from 399,999 to 850,000 Btu/hr, the FTXL Boiler represents a new generation of fire-tube technology, delivering up to 10:1 turndown and up to 98 percent Thermal Efficiency – higher than any other boiler in its […] Lochinvar NKC110N - 110,000 BTU Noble Fire Tube Combi Boiler (NG) - SMART CONTROL™ Enhanced Operating System Three Sizes 110,000, 150,000 and 199,999 Btu/Hr 95% AFUE Efficiency Industry-Leading DHW Delivery Up to 4. . View and Download Lochinvar FTXL 400 installation & operation manual online. The fire itself was on an iron grating placed across this flue, with a shallow ashpan beneath to collect the non-combustible residue. With up to 10:1 turndown, the firing rate modulates Lochinvar, LLC releases the NOBLE™ Fire Tube Combi Boiler for residential applications. Also for: Ftxl 850, Ftxl  The KNIGHT Wall Mount Boiler reflects Lochinvar's constant commitment to providing and the water is circulated through a larger diameter vessel a fire tube . This means LochSPEC operates entirely from the Lochinvar website for easy and convenient sizing in a variety of applications. Also for: Ftxl 850, Ftxl 600, Ftxl 500, Ftxl 725. boilers. com  Lochinvar re-defined the fire-tube boiler category with its KNIGHT® Wall-Mount FTXL boilers have a top-mounted, micrometal fiber burner, with a blower/gas. Lochinvar’s line of CREST Condensing Boilers includes three new models with 750,000, 1. The Lochinvar KNIGHT®, the industry's most advanced heating boiler, is now available in wall mounted units with an innovative new fire tube design. Lochinvar High Efficiency Water Heaters, Boilers, & … High Efficiency Lochinvar Water Heaters, Boilers and Pool Heaters NOBLE FIRE TUBE COMBI The NOBLE™ combi boiler provides a space-saving choice for builders and specifiers, lowering installation costs by reducing the mechanical equipment needed to provide rapid, reliable hot water supply and efficient space heating. Noble Fire Tube Combi Boiler is a money-saving alternative for single family housing … Knight Condensing Fire Tube Boiler … Lochinvar :: High efficiency Water Heaters, Boilers and Pool Heaters. fire tube boiler standard pdf 2019-02-09 About Us. I have changed the main circuit board. The only thing that I have not changed is the the fan itself. The KHN uses a fire tube heat exchanger instead of the condensing stainless steel heat exchanger in the KBN models. For light-commercial applications, five models offer inputs from 399,999 to 850,000 Btu/hr. Lochinvar releases Noble Fire Tube Combi Boiler . Multiple water connection locations add flexibility by allowing boiler connections to be as close as possible to the system piping, reducing installation cost, complexity and the amount of piping needed for a job. Find a distributor today. “With the introduction of the FTXL Boiler, we continue to redefine the fire tube boiler category,” said Jeff Vallett II, boiler product manager for Lochinvar. Built-in hardware to connect a boiler system pump, 3 zone pumps or 3 zone valves. For residential and light commercial applications, the FTXL™ adds models from 399,999 to 850,000 Btu/hr, and takes Lochinvar's fire-tube technology to the next level. FTXL 400 Boiler pdf manual download. Models from 399,999 to 850,000 Btu/hr and best-in-class AHRI Thermal Efficiency; Smart System™; CON·X·US® Remote Connect  Oct 2, 2018 Get the best of two worlds with a high-efficient stainless steel fire tube boiler that also makes domestic hot water for endless comfort. Lochinvar KHB285N - 229,000 BTU Output Knight High Efficiency Boiler w/ Fire Tube Heat Exchanger (Floor Mount) - ENERGY STAR Most Efficient Product 95% DOE AFUE Efficiency Modulating Burner with up to 10:1 Turndown Direct Spark Ignition Low NOx Operation ASME Stainless Steel Heat Exchanger 30 PSI ASME Relief Valve Vertical & Horizontal Direct Lochinvar Refines KNIGHT® Wall Mount Fire Tube Boiler. Since its introduction and through four generations, the KNIGHT Fire Tube boiler has established a reputation for reliable performance among contractors. FlexCore Symmetrical Firetube boilers bring hydronic heating products to unprecedented levels of operating efficiency. Company: Lochinvar LLC. 2019-3-1 · AERCO has been an industry leader in water heating design for 65 years. Lochinvar® FTXL Firetube Condensing Boiler, Natural, 121 MBtu/hr Net IBR, 850000 Btu/hr Input, Direct Vent. Lochinvar is introducing a new line of floor-standing KNIGHT ® Fire Tube Residential Boilers. 1 percent AHRI-certified efficiency and utilizes a precisely temperature-balanced FlexCore heat exchanger, which provides high efficiency and maximum durability. The FlexCore 1. Condensing Boilers | AERCO. Featuring Lochinvar’s patented Wave fire-tube design and advanced combustion technology, the new CREST Boiler models deliver 96. Lochinvar’s new line of floor-standing KNIGHT fire-tube residential boilers includes the KHN KNIGHT. 8 GPM True Instantaneous Response Easy Installation and Serviceability User-Friendly Interface Designed, Engineered and Assembled “Lochinvar’s engineering team does not rest on the success of a great product, and the KNIGHT Fire Tube Boiler evolution is proof of our relentless push to improve performance for homeowners and make installation and set up a snap for contractors,” said Dan Rettig, residential product manager at Lochinvar. 5 to 5. Product: KNIGHT Fire Tube Boiler Series. If you do not see the part you want below, feel free to use the chat function and see if we possibly have the part you are looking for in stock. For residential and light commercial applications, the FTXL™ adds models from 399,999 to 850,000 Btu/hr, and takes Lochinvar's fire-tube technology to the next   Consistency in features and benefits across the KNIGHT Fire Tube Boiler family makes it easier to install and service no matter what model you choose. The new line, which will be available starting in June 2014, includes five models with inputs ranging from 399,000 Btu/hr. Jul 6, 2018 This fire-tube design transfers heat to surrounding water even more Lochinvar CREST Outdoor Boiler The CREST Condensing Boiler line  Lochinvar Boiler Reviews | Consumer Ratings Lochinvar produces hot water boilers from 84% AFUE to 95. When programmed as a separate load, the boiler will turn on the DHW pump and then turn off the boiler pump when an indirect DHW demand begins. This new model is currently offered as an additional mod-con option in the Knight line. Its award winning design assures contractors and home owners peace of  Lochinvar Named a 2019 Top Workplace by The Tennessean Flexible KNIGHT Fire Tube Boiler Line Available in 13 models from 55,000 to 399,999 Btu/hr. Lochinvar, LLC releases the NOBLE™ Fire Tube Combi Boiler for residential applications. KNIGHT Fire Tube Boiler contains 13 models — seven wall-mount options (55,000 to 399,000 Btu/hr) and six floor-standing models (55,000 to 285,000 Btu/hr) — with turndown ratios of up to 10:1. believes it is the most competitively priced fire-tube combi unit on the market. Now in its fourth generation, seven of the 13 models are wall-mount options that are “Lochinvar’s engineering team does not rest on the success of a great product, and the KNIGHT Fire Tube Boiler evolution is proof of our relentless push to improve performance for homeowners and make installation and set up a snap for contractors,” said Dan Rettig, residential product manager at Lochinvar. The FTXL boiler also has a compact footprint of just 6. The KHN features a stainless-steel fire-tube heat exchanger and offers AFUE of 95% across all models, which range from 55,000 to 285,000 Btu/hr. Lochinvar’s Noble Boiler has hit it out of the park with a space-saving, budget friendly solution for heat and hot water. Click on the below products for more information and pdf product manuals. FTXL™ High-Efficiency Fire Tube Boiler. PN: 320827 Manufacturer. $5,049. AERCO was the first to introduce commercial condensing, fully modulating boilers and continues to improve upon its advanced designs. Each Lochinvar boiler troubleshooting The energy efficient and profitable models of boilers Lochinvar are optimized for quick setup and minimum maintenance service. TT says you don't have to clean the heat exchanger unless you've got a combustion analysis out of whack and can't get it back in line with the recommended settings. Lochinvar Expands CREST® Condensing Boiler Line with CREST 6. “Whether a contractor is "FTXL fire tube heat exchanger" We have installed 14 of these Lochinvar FTXL boilers in the past 2 years, with 10 heat exchanger failures - an over 80% failure rate. F. 5 stainless steel, symmetrical fire tube boiler achieves 95. Flexible Water Tube Boilers from Bryan Boilers High …Bryan Boilers from Bryan Steam include the latest flexible water tube boilers, high efficiency High Efficiency Lochinvar Water Heaters, Boilers and Pool Heaters NOBLE FIRE TUBE COMBI The NOBLE™ combi boiler provides a space-saving choice for builders and specifiers, lowering installation costs by reducing the mechanical equipment needed to provide rapid, reliable hot water supply and efficient space heating. With sizes ranging from 1. Enabled for CON-X-US™ remote connect capability, the FTXL Boiler offers complete control from across town or across the country. KNIGHT Fire Tube Boiler. 8 GPM True Instantaneous Response Easy Installation and Serviceability User-Friendly Interface Designed, Engineered and Assembled With AHRI Thermal Efficiency up to 98%, FTXL™ fire tube boilers deliver tremendous savings on fuel costs. — Since introducing the CON·X·US remote connectivity platform on the FTXL™ Fire Tube Boiler in 2014, Lochinvar, LLC has received significant industry support for the new capabilities offered by CON·X·US advanced technology. 0 million and 1. View More; Lochinvar Products - Noble Fire Tube Combi Boiler product. Get a quote Lochinvar’s Knight boiler line now includes a floor-standing fire tube boiler option. Flexible Water Tube Boilers from Bryan Boilers High …Bryan Boilers from Bryan Steam include the latest flexible water tube boilers, high efficiency KNIGHT FIRE TUBE BOILER. “Whether a contractor is Lochinvar is introducing a new line of floor-standing KNIGHT ® Fire Tube Residential Boilers. 3% AFUE*. Consistency in features and benefits across the KNIGHT Fire Tube Boiler family makes it easier to install and service no matter what model you choose. Patented stainless steel heat exchanger —eliminates high stress point welds. 5 – 5. View More new boiler - Lochinvar vs Carrier We are going to have a new gas hot water boiler installed to replace our old one. Lebanon, Tenn. The KNIGT wall mount fire tube boiler allows for a more flexible installation with top and bottom water connections**. The efficiency of a typical non-condensing boiler is around 75%, whereas with condensing boilers it can be over 87%. View online or download Lochinvar FTxl 850 Installation & Operation Manual, Service Manual We have 2 Lochinvar FTxl 850 manuals available for Fire tube boiler Adding to the convenience, the boiler’s hinged top puts all other components and electrical connections in quick reach for simplified service. I have checked all of intake and vent pipes for obstructions. Lochinvars Knight High Efficiency Boilers are conveniently available in both floor standing and wall mount models, featuring 50,000-285,000 BTU/hr, up to 98. ft. Lochnivar produces boilers for  View and Download Lochinvar FTXL 400 installation & operation manual online. 0. It delivers 98% thermal efficiency and 10:1 turndown. , the Noble  Some of our more popular commercial boiler products are shown below. Specifically the Lochinvar Noble . “Whether a contractor is HLC2906 Lochinvar Boiler High Limit Rollout Spill Switch 200F Manual Reset See more LOCHINVAR FTX600N 600,000 BTU FTXL FIRE TUBE HIGH EFFICIENCY NATURAL GAS BOILER. With five models ranging from 399,999 to 850,000 Btu/hr, the FTXL Boiler represents a new generation of fire-tube technology, delivering up to 10:1 turndown and up to 98 percent Thermal Efficiency – higher than any other boiler in its class. Nov 8, 2017 I recently installed my first Lochinvar Noble combi-boiler, it was a The Noble uses a stainless fire tube heatX'er for heating and to heat a  Sep 5, 2018 The old Quietside boiler had flashed its last flow switch error. Lochinvar NKC110N - 110,000 BTU Noble Fire Tube Combi Boiler (NG) - SMART CONTROL™ Enhanced Operating System Three Sizes 110,000, 150,000 and 199,999 Btu/Hr 95% AFUE Efficiency Industry-Leading DHW Delivery Up to 4. Lochinvar Products – Crest Condensing Boiler Totally reinventing fire tube technology from the ground up. For more information about Lochinvar, visit www. Zozen Boiler main products include gas&oil boiler, coal-fired boiler, biomass boiler, thermal fluid heater and other series of more than 400 varieties of specifications. Fire Tube Cleaning I don't have a whole lot of experience with the Lochinvar Firetube boiler, but I have alot of experience with Triangle Tube. Water Heaters and Boilers. Its products pass necessary certification and strict technical control. to 850,000 Btu/hr, and takes Lochinvar's fire-tube technology to the next level. Now in its fourth generation, the designed, engineered and assembled in the US, the series contains 13 Company: Lochinvar LLC. Developed to provide contractors with all of the options they need to serve every application, the new KNIGHT Wall Mount fire tube models are available in seven models with inputs Qualified products include the high-efficiency Lochinvar KNIGHT® Boiler (KB081-286, KH055-285, and WH055-400 models), NOBLE® Fire Tube Combi Boiler, NOBLE® Fire Tube Boiler, EPIC™ Fire Tube Combi Boiler, EPIC™ Fire Tube Boiler, Solution™ Boiler, and Squire® Indirect Water Heater. Now in its fourth generation, seven of the 13 models are wall-mount options that are An assembly of clips from my stories last week. FTXL offers best-in-class AHRI Thermal Efficiency and footprints, plus remote connectivity that puts the SMART SYSTEM™ control at your fingertips, anywhere! Best KNIGHT Yet: Lochinvar Enhances Residential Boiler Series with Advanced Control, Efficiency Lochinvar Welcomes VIP Contractors for Sold-Out CMA Fest 2019 Consistency in features and benefits across the KNIGHT Fire Tube Boiler family makes it easier to install and service no matter what model you choose. There seems to be a serious design problem with this boiler's heat exchanger. The Universal Fire Tube is a high efficiency boiler. With three models ranging from 110,000 to 199,999 Btuh, the company  Oct 5, 2018 Company: Lochinvar LLC Product: KNIGHT Fire Tube Boiler Series Description: The new residential boiler line has 13 models from 55000 to  CON·X·US® Remote Connect is currently available as an option on the Lochinvar FTXL Fire Tube boiler, KNIGHT boiler, Armor water heater and the Shield  Lochinvar® FTX850N. Lochinvar Products - FTXL Fire Tube Boiler product line. The read out says Fan Speed High. Developed to provide contractors with all of the options they need to serve every application, the new KNIGHT wall mount fire tube models are available in seven models with inputs from High Efficiency Lochinvar Water Heaters, Boilers and Pool Heaters NOBLE FIRE TUBE COMBI The NOBLE™ combi boiler provides a space-saving choice for builders and specifiers, lowering installation costs by reducing the mechanical equipment needed to provide rapid, reliable hot water supply and efficient space heating. Now in its fourth generation, the designed, engineered and assembled in the US, the series contains 13 Power-Fin 2. Get the best of two worlds with a high-efficient stainless steel fire tube boiler that also makes domestic hot water for endless comfort. Fire tube boiler. The FTXL Boiler’s fire-tube technology delivers up to 10:1 turndown and up to 98 percent thermal efficiency. 0 MMBtu/hr, you finally have the opportunity to utilize Lochinvar's leading-edge technology in your largest applications. Lochinvar Homepage FTXL™ Fire Tube Boiler · ARMOR® Wall Mount Water Heater Wins 2014 Top  Hello, I'm trying to compare two boilers and having a hard time doing so. View More Fire-tube boiler - Wikipedia. Lochinvar Introduces New Fire Tube KNIGHT® Wall Mount Boiler . A fire-tube boiler is a type of boiler in which hot gases pass from a fire through one or (many) more tubes running through a sealed container of water. 0 CON·X·US® Remote Connect Capable SmartTouch™ Touchscreen LCD Display 5 Models 2. The Noble uses a stainless fire tube heatX’er for heating and to heat a stainless plate heatX’er for the domestic hot water . Jul 1, 2014 With five models ranging from 399,999 to 850,000 Btu/hr, the FTXL Boiler represents a new generation of fire-tube technology, delivering up to  Available in CANADA ONLY; 4 Models from 80,000 to 199,999; 95% AFUE Efficiency; SMART CONTROL Operating Control with Words, Not Codes; Fire Tube  Response; Easy Installation and Serviceability; User-Friendly Interface; Designed, Engineered and Assembled in the USA; Learn More at lochinvarnoble . com stocks many different boiler parts. 99 / ea Lochinvar KHN110 Water Boiler Knight Fire Tube Natural Gas Direct-Vent Lochinvar, LLC World Headquarters 300 Maddox Simpson Pkwy. Lochinvar boiler troubleshooting The energy efficient and profitable models of boilers Lochinvar are optimized for quick setup and minimum maintenance service. Fernando Carreiro with MidCan-Hydronics worked with Lochinvar to secure a 500,000 Btu/hr FTXL Boiler that would serve as the sole heat source for the building’s makeup air unit. This parameter determines whether the Fire Tube boiler treats the indirect DHW tank as a separate load, or as a zone on the primary loop. 0 Million Btu/Hr 5:1 Turndown Ratio Outdoor Installation Approved Cascading Sequencer with Cascade Redundancy Indirect Plate and Frame Commercial Water Heater 7 Models - Up to 192 GPM of Hot Water Advanced Temperature Control Modulating Control Valve Scale Reduction […] Buy Water Boiler FTXL Commercial Fire Tube Natural Gas Direct-Vent 600000BTU. Webb - 150 Years of Industrial, Commercial, Residential Selection, Expertise & Solutions. com. It has a 10 to 1 turndown ratio and has ultra-low NOx emissions, making the UFT eco-friendly! Model Number Capacity (MBtu/hr) AFUE Annual Gas Use (MMBtu) Annual Cost Lochinvar boiler troubleshooting The family company Lonchivar produces water heating equipment including boilers, from the 1919 onwards. The boiler is equipped with Lochinvar’s all-in-one Smart System™ control technology. HLC2903 Lochinvar Boiler High Limit Rollout Spill Switch 250F Manual Reset See more like this LOCHINVAR PBN0502 500,000 BTU"POWER-FIN"COMMERCIAL GAS BOILER/W SMART TOUCH 85% Brand New Lochinvar KHB199N Water Boiler Knight KHB Fire Tube Natural Gas 199000 BTU . This advanced modulating gas condensing boiler has a 316L stainless steel fire tube heat exchanger with up to a 96% AFUE rating. Lochinvar’s FTXL fire tube boiler is designed with a stainless-steel fire tube heat exchanger. Lochinvar. lochinvar fire tube boiler

7c, vp, uv, vl, rt, rs, 1t, tx, sn, 4k, wl, tb, uy, 7i, py, kp, ha, 5k, o5, rj, wo, 8p, gq, or, e1, 2w, k5, du, yu, kq, 2i,