A portion of every Stream33, Breeze33, Craft33, and Bright33, purchase will be donated to your local Feeding America foodbank. Famous Supply will also make product donations to Habitat for Humanity. All to help make our dream of better local communities become a reality.Learn More
Stream33 offers high quality plumbing products priced right. From bathroom and kitchen products to pre-assembled installation kits and behind-the-wall products, you can count on Stream33 for convenience, quality and value.Learn More
Breeze33 offers high quality HVAC and air distribution products that are priced right. From mini split systems to room air conditioners and dehumidifiers and registers, you can count on Breeze33 for convenience, quality and value.Learn More
Craft33 offers high quality all-wood cabinetry that is priced right. Styles from transitional to modern and traditional, you can count on Craft33 cabinets to compliment your clients’ lifestyle and budget.Learn More
Bright33 offers high quality LED lighting products priced right. Discover indoor and outdoor LED lighting options from undercabinet to ceiling and vanity, you can trust Bright33 for convenience, quality and value.Learn More
Famous Supply has over 45,000 products in stock with experts to serve the residential, commercial, institutional & industrial markets.Learn More
Find solutions tailored to meet your professional plumbing, HVAC, and building company needs. We offer a wide range of programs and services to help customers streamline daily operations. See what Famous Supply can do for you.Learn More
With 31 Famous Supply locations in Ohio, western Pennsylvania, and West Virginia, your local Famous counter has everything you need to help you get your project done. Famous’ greatest asset is our quality Associates dedicated to serving you, our valued customer!
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With over 45,000 SKUs in stock, Famous Supply specialized in HVAC, plumbing, industrial, building products, and training. We sell into the residential, commercial and industrial market segments for new construction, replacement, repair, remodel, parts and service.Learn More
Famous Supply can help you with specifications, product options at various price points, design, layout, scheduling and coordination of your project from A to Z. We are your one-stop shop for HVAC, plumbing, cabinets, countertops, appliances, lighting, windows and doors.Learn More
July 16, 2019 Bradford White
Do you know the difference between tank capacity and usable storage?
When a water heater's approximate set point temperature is satisfied and is in "standby" mode, there is approximately 70% of the total tank capacity available. For example, if a 100 gallon water heater's set point temperature is satisfied, there will be approximately 70 gallons of the stored temperature available for immediate use.
Knowing this helps with accurately sizing applications, especially when a specific "dump capacity" is needed.
You can use the formula shown below in commercial applications that require a larger dump capacity (car washes, large showers, etc.).
Example of a 100 gallon water heater with Incoming Water Temperature of 40°, Water Set Point Temperature of 160°F, and Delivered Water Temperature of 120°F:
1) (120 - 40) / (160 - 40) = 80 / 120 = 0.6666
2) (100 x 0.70) / 0.6666 = 105 gallons of usable storage
* Usable storage = 70%