Burnham AL70SL
Burnham AL70SL
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Burnham AL70SL - 70 Gal. - Indirect Water Heater



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Ships Friday, Sep 22nd
Shipping to60601
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$375 / Month
Suggested monthly payments with 6 month financing.
Burnham AL70SL - 70 Gal. - Indirect Water Heater
Burnham AL70SL - 70 Gal. - Indirect Water Heater
Model: AL70SL
Product Q&A
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Recommended Accessories

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Expert Recommended Accessories Selected by Bob, our Expert
Required Accessories 9
These accessories are required to properly setup/install this product.
Optional Accessories 10


    Burnham is devoted to pushing the limits of heating technology and efficiency. Their ingenuity is responsible for some of the most efficient products on the market today. The Alliance SL is Burnham's foray into indirect-fired water heating. Using your boiler as a heat source means that the recovery rate of Alliance SL models is superior to that of standard direct-fired or electric water heaters. In addition to efficiency, the Alliance SL is also designed for simplicity. All connections are easily accessible at the top of the tank, where the heat exchanger is mounted. By mounting the heat exchanger here, it may be serviced without draining the tank. Easy to install, easy to service, and energy efficient, the AL70SL is the perfect water heating solution for any application.
  • HydraStone Lining
  • A 1/2" thick HydraStone lining protects the steel tank of all Alliance SL models. This lining deoxygenates the water along the edges of the tank, making it non-corrosive.
  • Burnham Control Compatible
  • Alliance SL indirect-fired water heaters are designed to work with Burnham's proprietary controls systems, IQ and Sage2.1. These systems can prioritize the Alliance SL over space heating and modify the water temperature for ideal recovery rates.
  • Cold Water Diffuser
  • A cold water diffuser in the tank prevents cold water from being introduced to hot water. This improves the output of the water heater.
  • Product Includes
  • (1) Burnham AL70SL Indirect-Fired Water Heater
  • (1) Burnham 101379-01 TPI Control
California residents see
Warning: This product can expose you to chemicals including Chromium (hexavalent compounds) which is known to the State of California to cause Developmental Harm.
For more information go to: www.p65Warnings.ca.gov


specs product image PID-37738
Product Category
Water Heater - Indirect-Fired
General Information
Indirect Water Heater
Product Line
Alliance SL
Product Category
Water Heater - Indirect-Fired
Medium Learn More
Medium refers to the substance that carries heat through the heating system. Systems are either designed to use either Hot Water or Steam as a medium, and components are usually specific to one or the other.
Hot Water
Fuel Type Learn More
Fuel Type
To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
Indirect Fired
Storage Type
Coils Quantity
Connection Type
First Hour Delivery Learn More
First Hour Delivery
Sometimes called First Hour Rating, this is the number of gallons of hot water the heater can supply per hour when starting with a fully heated tank. The recovery of the water heater depends on your boiler's BTU and boiler output temperature.
294 Gallons
Continuous Recovery Rate
217 Gallons
Storage Volume
70 Gallons
Cold Water Inlet
3/4 Inch
Hot Water Outlet
3/4 Inch
Supply Connection
3/4 Inch
Return Connection
3/4 Inch
Product Diameter
28 Inches
Product Height
45 3/4 Inches
Shipping Weight
300 Pounds
Country of Origin
United States
Warranty Information
Parts Warranty Learn More
Parts Warranty
A warranty is a safeguard from defects in manufacturing and can vary in length and terms. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
1 Year
Vessel Warranty
10 Years


Burnham AL70SL Reviews & Ratings

Product Q&A

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Product Questions Answered by Bob, the Heating Product Expert
How do you check the temperature of the water in this unit?
from Pennsylvania 
December 20, 2020
How do I flush out the tank?
Hector R. 
from New York 
May 08, 2016
Please explain "indirect fired." Does it need to be connected to a existing boiler?
from District of Columbia 
September 13, 2015

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Burnham AL70SL - 70 Gal. - Indirect Water Heater
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