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- USA
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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 4 - Jul 9
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Description
A.O. Smith Signature 100 40-Gallon Short 6-year Warranty 38000-BTU Direct Vent Natural Gas Water HeaterA. O. Smith's Signature 100 Series 40 Gallon Tall Low NOx Direct Vent Natural Gas Water Heater is designed to provide efficient and reliable hot water for households with 3 to 4 people when sized appropriately. With an environmentally friendly 38,000 BTU Low NOx gas burner, this natural gas water heater delivers 64 gallons of hot water in the first hour. It has an electronic gas valve that provides precise temperature control for optimum hot water
A. O. Smith's Signature 100 Series 40-Gallon Tall Low NOx Direct Vent Natural Gas Water Heater is designed to provide efficient and reliable hot water for households with 3 to 4 people when sized appropriately. With an environmentally friendly 38,000 BTU Low NOx gas burner, this natural gas water heater delivers 64 gallons of hot water in the first hour. It has an electronic gas valve that provides precise temperature control for optimum hot water delivery without the need for an external power source. For your convenience, the gas valve also includes an LED status indicator for diagnostics reporting and a push button ignition to simplify the startup process. A. O. Smith's 40-gallon natural gas water heater is designed with your safety in mind. With a built-in safety system, this model reduces the risk of accidental flammable vapor ignitions. A factory-installed temperature and pressure relief valve and tamper-proof drain valve also ensures safe operation. This model is built to last. It features Tank Guard® which is designed to provide ultimate tank protection and increase lifespan of the water heater. This added protection comes with a 6-year limited warranty to give you additional peace of mind. Call 1-877-GOLowes to get this water heater installed.
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Delivers the ideal amount of hot water for households with 3 to 4 people when sized appropriately
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Features an environmentally-friendly 38,000 BTU low NOx burner that delivers 84 gallons in the first hour
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Electronic gas valve provides precise temperature control for optimum hot water delivery
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Self-diagnostic electronic gas control incorporates an LED status indicator that monitors and reports on the system's operational status
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Built-in safety system reduces the risk of accidental flammable vapor ignitions
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Short 49.75-in H x 22-in diameter design is ideal for condensed spaces like under staircases and closet installations
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Direct vent installs through side wall
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High-altitude certified from 0 ft to 7,700 ft
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Provides peace of mind with a 6-year limited tank and parts guarantee and a 1-year limited labor warranty
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 970 reviews
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Product Reviews
★★★★★ 5
Outstanding filter!
Color: White
This has been brilliant at getting dust removed from the air my breathing at night is so much better because it gets pollen out of the air and keeps everything fresh! I haven't used the auto control or sleep mode on purpose but it looks great runs quiet and does a wacking great job!
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Reviewed in the United States on May 2, 2026
★★★★★ 5
Great working air purifier for bedroom
Color: White
Works really well. The pre filter captures so much dust you can really tell it's working as it should. The screen shows how dirty the air is and you can watch it go down as it cleans, didn't think we would need that but it's been surprisingly satisfying to see the quality visually. Very quiet on the lowest setting, easy to sleep with.. gives a nice white noise. The highest still isn't bad, the volume is similar to like a normal tower fan. Design is nice, it's a good looking machine. The only negative would be how bright the small display screen is at night but we just cover it if needed. Haven't tried the oil extract diffuser and probably won't. Works very well for cigarette smell! I'm sure if we had two it would completely remove the smoke smell. Overall would definitely buy again.
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Reviewed in the United States on May 28, 2026
★★★★★ 4
Sound not an issue
Color: White
I've had this for about a month, so far works great. I smoke Cigars in my apartment and it is working good. Clears the smoke great even with the filter it came within is a bit loud on the 2nd and third setting, but it is not distracting. I leave it on the first setting over night and its quiet. Next morning there is no cigar smell. Of course I empty ash try. When I come home from work my place smells great and I hardly see see any dust on my glass TV stand and tables. I've read some bad reviews on the sound, but its something you don't hear when tv or radio is on. It really sounds like having a fan on. I would recommend this for the price. I've had other air purifiers no difference on sound.
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Reviewed in the United States on May 9, 2026
★★★★★ 5
MOOKA Air Purifier Rocks!
Color: White
I put my Mooka Air Purifier through a very hard test running it 24 hours a day 7 days a week 30 days in a 275 sq ft area so I could provide an accurate review. My husband and I have a dog, woodburning stove, our 115-year-old is close to the road and there is a limestone quarry across the street; our house is extraordinarily dusty. We noticed an improvement the very first day using our Mooka! The nighttime setting is silent so I was able to use it all night. When we’re in the room, we use settings 1 or 2 and can watch TV. When we are out of the room, we use setting 3. Setting 3 can be loud but that is okay, I need that extra power and it does a fantastic job. My Mooka is lightweight, easy to use and a compact workhorse. Another fantastic feature is the highly effective, affordable replacement Hepa filters that have a washable foam pre-filter. I paid under $80 for our Mooka and it is worth every penny. We are ordering a second one. The proof is in our air quality at home. Tried to upload photos of the filter, but could not, sorry!
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Reviewed in the United States on March 15, 2026
★★★★★ 5
This Thing WORKS!!!
Color: White
I have to rave about the quality and the "intelligence" of this product. When I first got it, I installed it in my kitchen along an exterior wall, about 25' away from cooking appliances. I noticed within the first week that the air in our house smelled much cleaner and overall fresher. It was a noticeable difference. We live right next to a gravel road, so there is constantly dust floating around. We notice far less dust in the air as well. The purifier was very easy to set up. I removed it from the box, inserted the filter, and plugged it in.
Where I really noticed that it does a fantastic job was when a plastic packet got left on our stove element and began melting. The smoke and smell were obvious right away, and this purifier kicked in immediately, going into overdrive and running at full speed to get the smell and a little bit of smoke out of the room. I was extremely impressed.
10/10 would recommend this product.
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Reviewed in the United States on March 27, 2026
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