Long Island Oil Company
Serving Long Island Since 1956 
 

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Hot water is one of the most affordable luxuries

Water Heater Sizing Guide

To select the right water heater for your home, you need to consider the size of your family and other factors that contribute to your First Hour hot water needs.
To Choose the Right Water Heater for You...
1. Determine whether your family is Low Demand or High Demand.

You should consider your family to be High Demand if...

  • There are more than two full baths in the home.
  • If you have an oversized whirlpool bath or other large tub. As a rule of thumb, the water heater tank capacity should be 100% of your bathtub capacity (example: 75-gallon tub / 75-gallon water heater).
  • There are (or will be) teenagers living in the home. It's a fact: teenagers use more hot water for showering and washing clothes.

2. Find your Family Size and Demand Profile in the chart below, and read across to find the First Hour Rating Requirement for your family. If you decide your family is High Demand, consider moving up to the next First Hour Rating level.

3.  There are many types of hot water heaters.  Direct Fired - which have their own oil burner, Indirect - which have their own hot water coil circulating hot water from the boiler which heats up the hot water tank and storage tanks - large thermoses of stored hot water.

Water Heaters

 


Please review the chart below, and call Robert, our installation manager.  He can provide options that best meet your hot water needs as well as your budget.

FAMILY SIZE

FIRST HOUR RATING REQUIREMENT

2 People

45 - 55 Gallons

3 People

55 - 65 Gallons

4 People

65 - 75 Gallons

5 People

75 - 85 Gallons

6 People

85 - 100 Gallons

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