Infern-O-Therm Stack Economizer Savings Calculator, Mid-Atlantic Concrete Equipment
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Infern-O-Therm Stack Economizer Savings Calculator

This calculator computes fuel savings and potential return on investment for an Infern-O-therm Stack Economizer retrofit kit for your direct contact water heating system. This unit, which uses flu exhaust gases to pre-heat incoming water, will fit most makes of direct-fired water heating tanks.
Assumptions: 1. Tank size = 15,000 gallons
2. Incoming water temperature = 50-55 degrees F.
3. Water flow rate = 47 GPM.
4. Stack temperature before retrofit = 465 degrees F.
5. Water temperature raised 32 degrees
6. Heating water for 10 hours a day, 5 days a week.
Webmaster's note: An improved version of this calculator, with many more variables, is in the works as of 5/20/08.
To be notified when the new calculator is posted here, click this link to email us: info@maconcrete.com.

For how many weeks during the year will you heat water? weeks
What is the cost of #2 Fuel Oil in your area?     $/gal.
What is your approximate purchase cost for an IOT Stack Economizer?  
What is your installation cost? (Figure 2 men for 2 days.)  
Your Savings
Return On Investment

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