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MANUALS (3)
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Product Highlights
Description
How does NEXT Hybrid work?
The NEXT Hybrid water heater features a patented heat transfer process that utilizes a secondary heat exchanger to capture the heated flue gas from the tankless unit and route it back through a buffer tank to extract additional heat. The combined effort of the two technologies creates a superior, more energy-efficient performance.
Conventional water heaters perform well with simultaneous demands because of their stored hot water. However, at times they run out of hot water during long draws because of the lower BTU input. Tankless technology performs well with long draws at steady flow rates. However, due to the lack of storage, they struggle with simultaneous demand from multiple fixtures. Combining the advantages of both technologies, NEXT Hybrid is the best of both worlds!
Combining the best features of tankless and conventional technologies, NEXT Hybrid features:
- ENERGY EFFICIENCY: Patented circulation system delivers 90% thermal efficiency, ensuring maximum heat transfer, saving money on operating costs compared to a standard 78% efficient conventional or 84% tankless gas water heaters. Condensing design includes condensate drain trap
- HYBRID TECHNOLOGY:
- Innovative technology that surpasses existing conventional and tankless designs.
- Patented water flow circulation system provides the performance of a tankless unit with extremely quick recovery.
- First hour delivery of 189 gallons of hot water.
- Smaller than a conventional 50-gallon gas water heater, but with twice the hot water delivery.
- Whole-home solution regardless of geography
- IMPROVED HOT WATER DELIVERY:
- Continuous hot water shower after shower when properly sized for your home
- No minimum flow rate for ignition
- No cold water sandwich
- Delivers hot water faster than tankless
- Internal storage easily handles peak demand
- SOPHISTICATED ELECTRONICS:
- User-friendly integrated temperature controller with LED numeric display allows for precise temperature settings
- Multiple Lifestyle Modes - Energy Saver, Vacation and Boost modes allow for simple one-touch customization based on specific hot water needs
- Safety lock feature deters unwanted access
- Error code display for easy troubleshooting
- LOWER INSTALLATION COSTS:
- Utilizes 1/2" gas line standard in most homes today
- Extremely low exhaust temperature enables PVC venting for easier, more economical installations
- Less expensive venting material versus stainless steel venting used with most tankless models
- Hot and cold water connections similar to conventional tank-style models
- POWER VENT DESIGN
- Uses inexpensive PVC, CPVC or ABS pipe for exhaust. Canadian installations require ULCS636 listed PVC or CPVC pipe for venting.
- Can be vented vertically thru-the-roof or horizontally thru-the-wall
- 2" pipe vents up to 50 equivalent feet
- 3" pipe vents up to 100 equivalent feet
- SIX YEAR LIMITED WARRANTY ON HEAT EX CHANGER , TANK AND PARTS
Specs
| Intended Household: | 5+ Person |
|---|---|
| Application: | Plumbing |
| Fuel Type: | Natural Gas |
| BTU Input: | 100000 |
| 1st Hour Delivery (Gallons): | 189 |
| Efficiency: | 90% |
| Voltage: | 120v |
| Amperage: | 2.5 |
| Hertz: | 60 |
| Vent Type: | Power Vent ABS PVC CPVC |
| Gas Connection: | 1/2" |
| Height (Inches): | 47.375" |
| Diameter (Inches): | 23-3/4" |
| Weight (lbs): | 198 lbs |
| Water Connection: | 3/4" |
| Recovery 90°F Rise: | 121 GPH |
| Warranty: | 6 Year Limited Tank/ 6 Year Limited on Component Parts |
Contact
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Product Q&A
16 QuestionsQ: Does the unit have dedicated make up (combustion) air piping? I do not see in schematic.
Asked by H 14 years ago
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It not set up to directly hook up supply air but there is a knockout and relatively easy method to allow for this function.
No. It only has a power vent and uses room air for combustion. I installed mine in a closet and was required to add two air vents. One high an one low, typically the vents are installed on closet doors.
If I understand your question correctly, no. Just exhaust vent. The unit draws combustion air from the surrounding air, so if you have a confined space, that space should be ducted -- there's no pipe fitting on the machine, as far as I know, for dedicated combustion air intake.
No, it does not. Only exhaust.
No it does not. It would require standard free air space around the unit for proper ventilation.
It doesn't come with supply air piping. My installation didn't require this. I did however have to install exhaust pvc piping. Desmond Harmon-Smith
Q: Can this be used where the temperature of the incoming water is 40 degrees
Asked by tom 14 years ago
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Verified Reply- PexSupply StaffAccording to the manufacturer, yes, the Hybrid Gas Water Heater can be used with 40 degree ground water.
You can expect a recovery 90 degree F rise at 121 gallons per hour. That means you would get water at 130 degrees. This does seem to be pushing the outer limits but still adequate. For a final confirmation I would call AO Smith with your question. Sent from my Verizon Wireless Phone
Yes. I live at 6500’ at Lake Tahoe and our incoming water in the winter is about that. I keep the temp set to 140° in the winter and have no problems.
I don't see why not. I just set the temp to 110 and it supplies endless hot water that does not scald. I love my hot water heater. Jon
Yes - but consider desired outlet temperature to determine how long heater can sustain it (tank is very small). Unit does have a 100K BTU burner (make sure your gas supply can support rate of flow).
It will actually work better than other demand heaters as it will keeps a tank heated for high flow rates that others would not manage. Then it will continue to heat the tank until it is at the set temperature.
Q: APPARENTLY THIS UNIT WILL PRODUCE 121 GALLONS/HOUR AT 90 DEGREES RISE. HOW MUCH OUTPUT PER HOUR IF WE SET IT TO 120 OR 130 DEGREES [ TEMP. OUTPUT ]? THAT IS 30-40 DEGREES HIGHER THAN YOUR SPEC. AVERAGE TEMP. IN ROOM WILL BE 72 DEGREES IF THAT MATTERS. PLEASE ADVISE.
Asked by BRIAN 14 years ago
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Hello - had this unit for a year and can report the following: My cold water temp ~55 degrees f, hot water set point = 140 degrees f so effectively an 85 degree rise. Was able to get 2 gpm (unlimited hot water) at that rate. Having said that, you better have an adequately sized gas line particularly if you have other gas appliances kicking on during water heat operation - burner = 100K BTU. Unit produces per spec. I can not recommend this heater - after 11 months of use unit fell unreliable, had AO Smith replace with a Vertex which I love (so far)..
I can't give you an exact answer. However, I can give you an idea of what I have seen so far. We have had this water heater for about 4 months now. I have the water heater itself set to 140 F and a mixing valve that knocks the output down to 125F. Our water heater is located in the attic, in February in Mississippi, it was probably around 60 or 70 degrees in the attic this year. However the unit is well enough insulated that i'm not sure the external temp matters much. It seems that we can run 2 showers for at least 30 minutes with no drop in temperature. We could probably run them much longer. If I run a shower while a large size jetted bathtub is filling, I did notice a drop in temperature just a couple minutes before the tub was full, probably down to 90 degrees or so. When the tub was turned off, the water was back to full temperature in under a minute. Hope this helps some.
It is a 100,000 Btu heat engine and that is the limit. However, you have 20 gal that is 9 degrees below the set temp. The storage will get through most uses and unless there is a continued high draw it will not run out. It is restoring the storage while you draw off it so it has a head start. Your question would be difficult to calculate but depends on how you use it.
Hello, Quick answer: You're computing temp rise from zero, not from ground temperature. That is incorrect. Underground water supply pipes across the country vary from about 40º-75º this means a theoretical rise to 130º- 165º based on the 90º specification. 120º-130º settings should be well within the 90º rise specification as long as your incoming water is not under 35º- 40º, and then you have other problems and are risking frozen pipes. This water heater produces 189 gallons of hot water during the first hour and 121 gallons per hour of constant use after that at 90º rise. It has three heating modes: Vacation: 90º, Energy Saver: 100º-135º, and Boost Mode: 140º-158º. I have mine set at 118º and it works really well. If you want to optimize the output of this heater I would definitely use 3/4" gas pipe to supply this heater. 1/2" gas is an option, but why starve the heater. This heater also works really well with hot water recirculation systems because it has a 25 gallon holding tank to feed from. The only time I've seen the heater not keep up with use was when a very large 85 gallon whirlpool tub plumbed with 3/4' pipe was opened up all of the way (85 gallons in 8 minutes will tax any heater). For all normal appliances plumbed with 1/2" I have never lost hot water, even after an hour of constant shower use. FYI, the first time I turned on the heater it only took about 8 minutes to heat the entire 25 gallon holding tank to 120º.
Q: The manual well describes how to change the anode. Does this water heater use a special anode or have an odd length? Part number, please.
Asked by primemover 15 years ago
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Verified Reply- PexSupply StaffThere are two anodes in this unit. 9004333005 and 9006291005. We would recommend using the AO Smith replacement parts.
Q: Does this unit come with any venting supplies? What is the power consumption in stand-by mode and operation mode?
Asked by 15 years ago
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Verified Reply- PexSupply StaffThis unit does not come with venting. It consumes 8 watts in standby and 250 watts at high fire.
Q: We have relatively hard water where we live, but the house that we just purchased has a water softener. Tankless water heaters seem to need more maintenance in hard water areas. Is that true of this unit, too, and will the water softener solve this problem for us?
Asked by 15 years ago
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Verified Reply- PexSupply StaffThis unit will require the same maintenance as a traditional tankless unit. A water softener will help the unit run and last longer.
Hard water will cause any hot water heater to clog up faster. (mineral deposits). Have your water tested first to determine if you need a watersoftener. Water softeners can cause problems also, such as increasing the conductivity of the water- increasing anode wear. Also water-softeners can leetch salt byproducts, such as sand from flushing cycles downstream to faucets. The water softener resevoir should be cleaned out yearly. The plus side to having soft water is you wont have as much scale build-up inside your plubing.
Q: Can this unit be used as backup water heater for a solar water heating system? That is, can it work with input water that's already heated, and will it switch on only when the input water temperature goes below a certain threshold, in case there's not enough sun?
Asked by 15 years ago
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Verified Reply- PexSupply StaffIt can, according to the manufacturer. You will have to set the temperature on the hybrid to a set point you want your water to maintain.
Verified Reply- PexSupply StaffPrimarily you would be using the solar as a recirculation loop, which would provide a warmer inlet temperature than the HYB-90N. The HYB-90N will fire when the tank temperature drops approximately 14 degrees below the set point on the HYB-90N.
Q: Will this work with a home plumbing system that has a recirculating pump to keep hot water circulating in a large house to have instant hot water everywhere?
Asked by 15 years ago
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Verified Reply- PexSupply StaffYes, it will. You would plumb it in just like a tank-type water heater.
Q: I am interested in purchasing the Smith NEXT Hybrid gas water heater and wanted to know if there is a built-in inlet for connecting a hot water circulating return rather then using the cold water inlet or tank drain outlet? I can find no photos of the actual interior of the unit and nothing is mentioned in the installation manual.
Asked by TechChuck 15 years ago
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Verified Reply- PexSupply StaffAccording to the manufacturer, there is no separate connection for a circulator pump. Your best options would be using the drain valve or teeing it into the cold water inlet.
Q: how many gallons per minute if this is a tankless water heater?
Asked by Mic 16 years ago
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Verified Reply- PexSupply StaffThis unit is measured in gallons per hour and it will provide 121 gallons of water per hour.
(121 gallon)/(1 hour) X (1 hour)/(60 minute) = (121 gallon)/(60 minute) = 2.02 gallon per min