Classic Hydronics: How to Get the Most From Those Older ... RPK-EXT External Pump Kit | Noritz Products with recirculation features quickly provide hot water as to the standard models. TK-540P-NEH - Takagi Tankless Water Heaters 2018 Uniform Plumbing Code 1 Finish. tankless hot water heaters with recirculation Navien vs Rinnai Tankless Water Heaters Comparison in ... Found inside – Page 393It is extremely important that the design team size a tankless water-heater system to meet the needs ofthe family. ... Circulating Hot-Water Systems Hot-water recirculation is the process of constantly moving water through a continuous ... Separate recirculation pumps: If you have a tankless unit without a pump, one can be installed. I wanted you to know what I know and I wanted you to be able to do what I can do when it comes to old steam systems. This book arrived in 1992 and has since gone though dozens of printings. 199k BTU Takagi Outdoor Condensing Tankless Water Heater ... These new Ultra Series condensing tankless water heater models, RUR98i and RUR98e, feature recirculation (with or without a dedicated recirculation line) provided by thermal bypass technology which includes an integrated pump, internal bypass line and thermal bypass valve which means less wait time for hot water. This product hasn't received any reviews yet. 99 ($43.33/L) Get it as soon as Wed, Aug 18. The GT-540P-NEH outdoor tankless water heater uses up to 199,000 BTU/hr of natural gas to deliver an endless supply of hot water for a 3 bath home in northern climates and a 4 bath home in southern climates. FREE Shipping by Amazon. Savings for liquid propane models may be higher. PlumbingSupply.com ® is pleased to offer these unique hot water on-demand recirculating systems from Advanced Conservation Technology, Inc. that are well-suited to residential or commercial use, and that will save you time and money as well as being environmentally friendly. Pump wire needs to be plugged directly to water heater using Molex connector. Hot Water to Fixtures Gas Pipe Cold Water Pipe Hot Water Pipe Union Return Circulation Line Shut-off Valve Circulation Pump Pressure Relief Valve Check Valve Cold Water . Select to Compare . The NPE-2 series offers ultra-high efficiency up to 0.96 UEF to keep your utility bills low, endless hot water, and exclusive ComfortFlow® technology with a built-in recirculation pump and buffer tank. Noritz 10.4-GPM 199000-BTU Indoor/Outdoor Natural Gas ... Built-in recirculation system. Found inside – Page 14One is a recirculation pump system ... with insulated lines , and the third involves strategic location of the heater within 20 feet of any fixture . ... For our LEED project , we decided to install a propane tankless water heater . The onboard computer modulates combustion to yield an Energy Factor . Rinnai Sensei 11 GPM 199000 BTU 120 Volt Residential Natural Gas Tankless Water Heater for Outdoor Installation with Recirculation Pump. Get the lowest price on a 199k BTU 90% AFUE Takagi Outdoor Condensing Tankless Water Heater with Integrated Recirculation Pump - TK-540P-XEH - Fast Delivery, Lifetime Tech Support, & Free Shipping on most items. I have a Rinnai gas tankless water heater with a built in recirculation pump. 3. Additional information on the Minnesota State Building Code can be found at the Minnesota Department of Labor & Industry's website: http://www.dli.mn.gov/business/codes-and-laws. Navien has been pushing the boundaries of efficiency for 25 years. They will also function with our EZ Series line, including EZ98, EZ111, EZTR50, and EZTR75. Anti-Scale Devices Tankless water heaters are greatly affected by scale deposits as this can slow down their flow rate. Found insideClean very thoroughly Repair leaky faucets Repack pump packing glands of recirculation hot water heaters to reduce leaking of hot water For boilers with immersion , tankless , domestic hot water coils , make sure boiler water covers ... Plus, the modulating technology and minimum fire rating of the Rinnai tankless rack system enables it to maintain consistent temperature in a return line with limited waste. Rinnai White 15 Inch Wide 9.8 Gallon Per Minute Outdoor Natural Gas Tankless Water Heater. Q. Recirculation Pump Kit-Ready Quickly pairs with our Recirculation Pump kit to provide instantaneous hot water at the tap 2; Best Portable outdoor tankless water heater - Camplux 5L 1.32 GPM. $259.99. Rheem RTGH-RH10DVLN Prestige Series NATURAL GAS Condensing Tankless Water Heater w/Built-In Recirculation $1,338.00 $1,338.00 888-758-6270 Mon-Thur 7am-5pm Fri 7am-4pm cst H-1 Indoor or Outdoor Tankless Water Heater (1) Tankless Service Valve Kits (Webstone EXP2 or equivalent) (1) Pressure Relief Valve for tankless Drawing No TKPD12101 5/12. Warranty of Navien tankless water heater. Installs on TANKLESS HEATER WITHOUT BUILT-IN PUMP FOR SINGLE PIPE INSTALLATION, For up to 250 Ft. of total pipe length and tankless Flow requirement of .4 GPM or less, Stainless single speed circulator with union connections, 10 ft. line cord, with outdoor enclosure, water, sprinkler, bug and anti-tampering locking device tab. A check valve ensures that hot water flows in only one direction. the best part is, Noritz can provide . Starting at $2,905.00. These new Ultra Series condensing tankless water heater models, RUR98i and RUR98e, feature recirculation (with or without a dedicated recirculation line) provided by thermal bypass technology which includes an integrated pump, internal bypass line and thermal bypass valve which means less wait time for hot water. Rinnai White 15 Inch Wide 9.8 Gallon Per Minute Outdoor Liquic Propane Tankless Water Heater. This is the best choice if you're installing a new water heater. The ATO-540P-N outdoor tankless water heater uses up to 199,000 BTU/hr of natural gas to deliver an endless supply of hot water for a 3 bath home in northern climates and a 4 bath home in southern climates. AquaMotion AMH2K-7X Dedicated Return Line Outdoor TANKLESS Water Recirculation. The GTS-540P-NEH outdoor tankless water heater uses up to 199,000 BTU/hr of natural gas to deliver an endless supply of hot water for a 3 bath home in northern climates and a 4 bath home in southern climates. Note : Eccotemp offers a 24/7 self-help desk and live chats to keep your comfort at maximum with hot water. 161. $1,024.20. Hot Water to Fixtures Gas Pipe Cold Water Pipe Hot Water Pipe Union Return Circulation Line Shut-off Valve Circulation Pump Pressure Relief Valve Check Valve Cold Water . Using Tankless with a Recirculation Loop. It saves the cost of pump installation. Cause due to its low capacity, the operation cost is very optimized. H-1 Indoor or Outdoor Tankless Water Heater (1) Tankless Service Valve Kits (Webstone EXP2 or equivalent) (1) Pressure Relief Valve for tankless Drawing No TKPD12101 5/12. Management of Legionella in Water Systems reviews the state of science on Legionella contamination of water systems, specifically the ecology and diagnosis. Tankless heaters with recirculation pumps: The cost is $250 to $415 more than those without pumps. 12. No more waiting for hot water. GT-540P-NEH - Condensing Ultra-Low NOx Outdoor 199,000 BTU Natural Gas Tankless Water Heater with Recirculation Pump, GT-340-NEH - Condensing Ultra-Low NOx Indoor 180,000 BTU Natural Gas Tankless Water Heater, Residential Hybrid Electric Heat Pump Water Heater, 15-year limited Heat Exchanger Warranty, 5-year parts warranty, 1-year labor warranty for Residential applications, 5-year limited Heat Exchanger Warranty, 5-year parts warranty, 1-year labor warranty for Commercial applications. Our whole-home tankless water heaters, available in natural gas, propane and electric models, are great for homes with busy families, homes with luxury bathrooms and vacation homes, while our point-of-use electric tankless water heaters are ideal for a single faucet or shower. The burner or heating element in your tankless water heater activates when you open a hot water tap, allowing the water to flow through. Rinnai Ultra Series Tankless Water Heaters deliver innovation and technological leadership in condensing tankless water heating design. This pump offers quiet, maintenance-free operation and includes a programmable timer that can be set to activate the pump only when you need it or set it to run 24-hours a day. This may require some modifications to the plumbing in your home but it is worth it if you want to keep your tankless water heater from freezing this winter season. The pump is easily controlled with a simple user interface and multiple pump settings allow you to customize pump . It is built with commercial grade materials like marine-grade 316L stainless steel giving it an industry-leading warranty. My longest run from the tankless is about 50ft. A pump attached to your water heater moves hot water through the line as soon as you turn on the faucet. 4.4 out of 5 stars. Happybuy RS15-6 Hot Water Recirculating Pump. For the AMH1K-RODRN, your tankless heater should not include a dedicated return line and does not require power or room under any sink, but it does require power at the tank. Available in different ranges: Rinnai has numerous different products in all kinds of price ranges and designs to meet the requirements of all kinds of users. Hot Water Circulation Pumps (3) Sort By: Best Match. These new Ultra Series condensing tankless water heater models, RUR98i and RUR98e, feature recirculation (with or without a dedicated recirculation line) provided by thermal bypass technology which includes an integrated pump, internal bypass line and thermal bypass valve which means less wait time for hot water. Overview. These new Ultra Series condensing tankless water heater models, RUR98i and RUR98e, feature recirculation (with or without a dedicated recirculation line) provided by thermal bypass technology which includes an integrated pump, internal bypass line and thermal bypass valve which means less wait time for hot water. All the tankless water heaters of Navien come with a warranty time of 15 years for their heat exchanger. © 2018, American Water Heaters. (70) FREE 2-Day Shipping. Every now and then we will send new product details, deals, and blog posts that you'd be interested in. The recirculation pump is on a timer and is used that way. This consists of a small pump and a return line from your farthest fixture. Enjoy the comfort and convenience of continuous hot water on demand with a Rheem ® tankless water heater. **** See note at bottom. B) A hot-water recirculation system. Any cold water in the line is returned to the water heater through the recirculation line. Noritz NR662-ODNG Outdoor Tankless Water Heater. NRCR features a 0.97 UEF rating, one of the best energy factors in the tankless market. Price Low to High. Specification . PlumbingSupply.com ® is pleased to offer these unique hot water on-demand recirculating systems from Advanced Conservation Technology, Inc. that are well-suited to residential or commercial use, and that will save you time and money as well as being environmentally friendly. Documents. Use with Tankless Heaters without built-in pump. 3. It does this by recirculating the water through your plumbing system, so hot water is always available in whatever part of the house that you may need it. Shipping ADD TO CART. Takagi TK-540P-PIH model is a model is a high-efficiency condensing indoor propane gas tankless water heater with a built-in hot water recirculation pump (for systems with a dedicated hot water return line). ON DEMAND INDOOR PROLINE XE W/RECIRCULATION PUMP: AWH Item#: GT-504P-NIH. Did you know tankless gas water heaters have a longer life span than tanked heater. Features. Privacy Policy. High-end models like Rinnai RU199iN Tankless Water Heaters even support water recirculation to conserve a good amount of water. The pump is easily controlled with a simple user interface and multiple pump settings allow you to customize pump operation to meet your needs while maximizing heater efficiency. IMHO recirculating water with a tankless heater is a misapplication of an expensive technology where a simpler high efficiency (well-insulated tank) water heater would make more sense. Rheem RTG-70XLP-1 Outdoor Propane Tankless Water Heater. For up to 100 ft. of total pipe length and tankless flow requirement of .5 GPM or less. The Eccotemp L5 propane tankless water heater is the best and original portable outdoor water heater in the market these days. Exclusive! On Demand Indoor Water Heater Item#: GT-540-NIH. Found inside – Page 10Total kated input fo :: Electric water heaters ( watts ) ? hon - electric water heaters ( BTUH ) ? Totai Recirculation pump power ( hp ) ? Average Hot water temperature ( F ) ? | P2111 .. P2112 P2113 --- 1 P2114 . i P2115 Watez beöler ... It is built with commercial grade materials like marine-grade 316L stainless steel giving it an industry-leading warranty. The GT-540P series integrates a recirculation pump to provide instant hot water in residential applications with dedicated recirculation lines. Even the Rinnai, the most famous, does not offer this longest warranty time. This time is very large than the other models belongs to very famous brands. The New Recirculation Pump Kit from Rheem provides immediate hot water using the Tankless water heater controls. The Happybuy water recirculating pump comes in various sizes, powers, and efficiency types. Noritz returns to our list with its NR662-ODNG, offering homeowners reliability, performance, and durability in a compact package. Timer set to . Enjoy fast and free shipping on all orders over $69! Featuring an integrated recirculation pump and heat exchangers composed of high quality stainless steel, the NRCR is designed to provide homeowners with reliable and faster hot water for years to come. Describes a range of older hot-water (hydronic) heating systems in detail and explains how to maximum their efficiency today Found inside – Page 21Exhibiting : A " packaged " bolt - on Rotary Burner complete with boiler front plate , complete panel board all ... way valve to admit hot water from the boiler for recirculating water thru the supply side of the heating system . Home > Water Heater > Residential Tanks > Tankless Water Heaters Vendor: AMERICAN WATER HEATER (7) Max BTU: . recirculation patterns that coincide with their hot water usage patterns. Found inside – Page 17282Spot Heaters ) ( 706-554 200 TEM REN .50M + IN CATALOG FILE SECTION LET US CATALOG With ove Sundog YOU CAN BUY -OR LEASE A SUNDOG HEATER ! AENGTON HEIGHTS DEN MS . CO . ... 34228-1401 ) ( Mfrs . Of Tankless Instant Water NR Heaters . The 540P series integrates a recirculation pump to provide instant hot water in residential applications with dedicated recirculation lines. 500800. The NPE-240A is a result of their dedication to providing an effective and green water heating unit. For outdoor tankless installation with a dedicated return line. Local, state, provincial and federal codes must be adhered to prior to installation. FIND YOUR INSTALLER. Pumps cost $235-$400 depending on the size . The Aqua-Shield™ was designed for the southern tier of the US market where tankless heaters are installed outside. Rinnai RUR98eN 9.8 Max GPM Ultra Series Condensing Outdoor Natural Gas Tankless Water Heater with Recirculation, Limited 12-year on heat exchanger, 5-year on parts, 1-year on, Rinnai Value Series Tankless Water Heater, Installation and Operation Manual: RU80i_RU80e_RU98i_RU98e, Rinnai RUR98iN 9.8 Max GPM Ultra Series Condensing Indoor Natural Gas Tankless Water Heater with Recirculation, Rinnai RUR98eP 9.8 Max GPM Ultra Series Condensing Outdoor Propane Tankless Water Heater with Recirculation, Rinnai RUR98iP 9.8 Max GPM Ultra Series Condensing Indoor Propane Tankless Water Heater with Recirculation, Rinnai RU98EN 9.8 GPM Outdoor Ultra-Nox Condensing Tankless Natural Gas Water Heater, Internal by-pass pipe for internal "recirculation". 3/4" FNPT stainless steel flange fittings. Navien NPE-240A 199,000 BTU Condensing PremiumGas Tankless Water Heater. "A. O. Smith's new 540P tankless water heater combines all of the great features of the condensing tankless series with an integrated recirculation pump to save contractors time and simplify residential installations," said David Chisolm, vice president of marketing for A. O. Smith. Width: 18.5 inches (469.9 mm)Height: 26 inches (660.4 mm)Depth: 10 inches (254 mm), Commercial: 98ø F - 140øF (37øC - 60øC), Limited 12-year on heat exchanger, 5-year on parts, 1-year on labor (5-year optional on labor), Limited 5-year on heat exchanger, 5-year on parts, 1-year on labor (2-year optional on labor), Warranty:Ultra Series (RU) | Value Series (V65) | Luxury Series (RL). Rinnai RUR199EP - RUR199EP 199,000 BTU Condensing Outdoor Tankless Water Heater w/ Recirculation Pump (Propane) - PROMOTION This item is eligible for a $100 Cash Rebate from Rinnai that is valid through December 31st, 2021. Primary heat exchanger is constructed of a commercial gradecopper that is more resilient to erosion. Select to Compare Quick View. Only those tankless heaters equipped with the recirculation pump or the buffer tank are capable of delivering hot water super-fast. Tankless Keeps Hot Water Recirculating. Watts Premier Hot Water Re-Circulating pump provides water to your faucet or shower instantly, eliminating water waste caused by waiting for water to heat up. Internal by-pass pipe for internal "recirculation". A circulating pump inside the water heater keeps hot water close to the outlet, minimizing the wait and, therefore, the waste of unused potable water down the . $259. (Sold Separately) Click here to review this water heater's Energy Guide for more details. Navien Premium Efficiency condensing tankless water heaters are the #1 selling high efficiency condensing tankless water heaters in North America. Water Flow Rate - 5L/1.32 Gallon Per Minute. The onboard computer modulates combustion to yield an Uniform Energy Factor . Camplux Pro 6L 1.58 GPM Outdoor Portable Propane Tankless Water Heater With 1.2 GPM Water Pump. 1 Finish. 1 Based on comparison of high efficiency condensing natural gas tankless model against 50-gallon tank type model with like fuel type. Noritz can provide you with faster hot water wherever and whenever you need it. 500800. Two recirculation modes are available: • Dedicated Mode - With a dedicated return line, the integrated pump recirculates water from the tankless water heater through Recirculation can be controlled via app . It is built with commercial grade materials like marine-grade 316L stainless steel giving it an industry-leading warranty. The 2006 International Mechanical Code provides up-to-date, comprehensive coverage that establishes minimum regulations for mechanical systems. Be the first to review this product! The newer models from Rinnai, have a motion sensor to turn on the tankless water heater when you are in the room where the motion sensor is placed. These new Ultra Series condensing tankless water heater models, RUR98i and RUR98e, feature recirculation (with or without a dedicated recirculation line) provided by thermal bypass technology which includes an integrated pump, internal bypass line and thermal bypass valve which means less wait time for hot water. The 2012 edition of the Uniform Plumbing Code (UPC©) represents the most current approaches in the plumbing field. Combining a whole house tankless water heater like a Steibel Eltron Tempra Series with a small mini-tank water heater like the Stiebel Eltron SHC Mini-Tank offers the benefits of both worlds by saving on water heating costs, reducing water usage, and providing hot water instantly at every faucet in your home. Buy the Rinnai RUR199eN Silver Direct. Hot water is available when needed, without the expense of circulating it during times of inactivity. male NPT water and gas connections. Shop for the Rinnai RUR199eN Silver Sensei 11 GPM 199000 BTU 120 Volt Residential Natural Gas Tankless Water Heater for Outdoor Installation with Recirculation Pump and save. Model: V94eN. Add To List Click to add item Watts® Hot Water Pump Recirculating System Sensor Valve to your list. Used in conjunction with PHCC's Plumbing Apprentice Training Program, the guide's illustrations and supplementary notes make it an indispensable training tool. 1 Finish. . Maximum total pipe length: 400 ft. ( 3/4 type L copper pipe ) or 75 ft. ( 1/2 type L copper pipe ) Extremely durable stainless steel pump casin. Timer controlled. Shop Noritz 10.4-GPM 199000-BTU Indoor/Outdoor Natural Gas Tankless Water Heater in the Tankless Gas Water Heaters department at Lowe's.com. The pump is easily controlled with a simple user interface and multiple pump settings allow you to customize pump operation to meet your needs while maximizing heater efficiency. Efficiency . This source book covers all the relevant technologies, including solar space and water heating as well as photovoltaic electricity. My longest run from the tankless is about 50ft. AO Smith ATO-540P-N - 199,000 BTU Condensing Ultra-Low NOx Outdoor Tankless Water Heater w/ Integrated Recirculation Pump (NG) - Overview: The 540P series integrates a recirculation pump to provide instant hot water in residential applications with dedicated recirculation lines. A recirculating pump will store and circulate heated water back through the tankless heater, preventing the system from freezing. American Water Heaters reserves the right to make product changes or improvements at any time without notice. Found inside – Page 1991-103Devices can be used in a wide range of industrial , commercial and outdoor applications . Stainless - steel and round - duct models are available . ( Dell Corp. ) Circle 35 TANKLESS WATER HEATERS CONVENTIONAL HOT WATER DISTRIBUTION CAN ... Stop waiting for water to heat up and watching money go down the drain. Recirculation solutions available in Rinnai HE+ and SE+ Series tankless water heaters. These new Ultra Series condensing tankless water heater models, RUR98i and RUR98e, feature recirculation (with or without a dedicated recirculation line) provided by thermal bypass technology which includes an integrated pump, internal bypass line and thermal bypass valve which means less wait time for hot water. Navien's patented ComfortFlow ® system is the first to include a buffer tank, recirculation pump and fine-tuned controls into a tankless water heater, resolving the cold-water sandwich effect* and issues of minimal flow rates commonly found in other tankless water heaters. Model: V94eP. As water flows through the heat exchanger, it absorbs the heat and quickly reaches the preset temperature before traveling to the open fixture (s). Secondary heat exchanger is made of type 316L stainless steel to protect against corrosion. This important reference guide includes provisions for fixtures, piping, fittings, and devices, as well as design and installation methods for water supply, sanitary drainage, and storm drainage. Found inside – Page 62Standby Generators Tankless pumping systems dali ? ... Mar , 60 chanical Systems , Aug , 73 Safety , boiler , Oct , 55 , 58 Thermoelectric hot water moeten we Salvaged steam and cooling water , Feb , 79 NASA Manned Spacecraft Center ... If you require warm water only for having an outdoor shower for you and small family members, then complex is the perfect solution. This code is founded upon certain basic principles of environmental sanitation and safety through properly designed, acceptably installed, and adequately maintained plumbing systems. This book contains Massachusetts Uniform State Plumbing Code, 248 CMR for the all plumbing related codes for the Commonwealth of Massachusetts Yes, a recirculation pump can be a great addition to your Rinnai tankless water heater system when continuous, on-demand hot water is needed. Federal law requires all HVAC technicians working with refrigerants and/or servicing, repairing, maintaining, or disposing of equipment that contains ozone depleting refrigerants to be certified. Provides a guide for the inexperienced homeowner on how to improve the energy consumption of a home, and includes tips on budget planning, air ventilation, energy-saving HVAC systems, and building codes and permits. Noritz NRCP series heaters offer the latest cutting edge technology in tankless water heaters. This pump offers quiet, maintenance-free operation and includes a programmable timer that can be set to activate the pump only when you need it or set it to run 24-hours a day. Takagi T-H3-DV-N Condensing Natural Gas Tankless Water Heater; This product is first on our honest condensing tankless water heater reviews. The heater shall have ¾ in. Best Match. Providing homeowners with an endless supply of hot water, energy savings, a space-saving design and environmental benefits, Rinnai now offers faster hot water with the new Ultra Series RUR models Tankless Water Heaters. Built-in recirculation pump with Circ-Logic™ technology allows users to set recirculation patterns that coincide with their hot water usage patterns Green. The newer models from Rinnai, have a motion sensor to turn on the tankless water heater when you are in the room where the motion sensor is placed. This revised edition features the latest design and installation techniques for residential and light commercial hydronic systems including use of renewable energy heat sources, hydraulic separation, smart circulators, distribution ... Best suited for up to 4 bathroom home Plumbing kit RTG20220AB included - a $95 value Built-in recirculation pump for instant hot water offering a savings up to 12,000 gallons of water per year Energy Star rated - .93 UEF Dual stainless-steel condensing heat exchanger Water leak detector sensor 2″ PVC venting up to 50 FT 199,000 BTU's Warranty: 12 years on heat exchanger, 5 . The pump operates with solar energy and comes with a 3-speed control switch which gives you better . External recirculation pump designed to function with Noritz's NR83DVC, NRC111DV, NR98DVC, SV, and DV heater. No Wasted Water - pushes cool water in the hot water line back to the water heater. The pump is easily controlled with a simple user interface and multiple pump settings allow you to customize pump operation to meet your needs while maximizing heater efficiency. The 2018 edition of the Uniform Plumbing Code (UPC©) represents the most current approaches in the plumbing field. Found inside – Page 72Exterior Elements for Your Home Checklist Greenhouse Outdoor fireplace Outdoor ... Tank water heater Tankless water heater Recirculation pump on water heater PEX pipe PEX pipe and copper pipe combination Copper pipe Copper and PVC pipe ... Details. Found inside – Page 221... 142-43 spot ventilation , 53-54 locations for , 53 outdoor air supply , 54 to prevent depressurization , 54 quiet ... 127 T table lamps , 128-29 See also light fixtures tankless water heaters , 119-20 , 163 diagram , 119 drawbacks ... Homes with no dedicated return line can have a thermal bypass valve added to the cold water line for recirculation. The TK-540P-NEH heater integrates a recirculation pump to provide instant hot water in residential applications with dedicated recirculation lines. How to install an On-Demand hot water circulation pump on a tankless water heater. The time it takes to deliver hot water from the heater to the fixture depends on the pipe length between these two points unless the recirculation system is in . Overheat film wrap with industry-best side to side clearance of 1/2 inch. Model: RUR199EN. A timer setting I have a Rinnai gas tankless water heater with a built in recirculation pump. The Westinghouse 11 GPM High Efficiency Natural Gas Outdoor Tankless Water Heater with Built-in Recirculation and Pump is constructed with a durable, high grade stainless steel heat exchanger to resist corrosion and provide a longer life expectancy. Price High to Low. The fully modulating, on-demand, condensing gas fired tankless water heater(s) with integrated recirculation pump shall be A. O. Smith Tankless Water Heater model ATI-540P or ATO-540P, having a maximum input rating of 199,000 Btu/h and available in NG or LP. The new NRCP line of residential tankless water heaters from Noritz America combines the high efficiency of condensing technology with the comfort and savings of hot-water recirculation. Rinnai is continually updating and improving products; therefore, specifications are subject to change without prior notice.

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