For a house with multiple heating appliances, what size L copper gas tube is required leaving the meter for a configuration involving two 65,000 BTU furnaces and three 55,000 BTU fireplaces?

Prepare for the Maine Gas Exam with our comprehensive quiz. Use flashcards and multiple choice questions, each featuring hints and explanations, to ace your test!

To determine the appropriate size of the L copper gas tube required when leaving the meter for a house with multiple heating appliances, it is important to calculate the total BTU load. In this scenario, the total load from the two furnaces and the three fireplaces can be calculated as follows:

  • Two furnaces, each rated at 65,000 BTU:

2 x 65,000 BTU = 130,000 BTU

  • Three fireplaces, each rated at 55,000 BTU:

3 x 55,000 BTU = 165,000 BTU

The overall total BTU load is:

130,000 BTU (from furnaces) + 165,000 BTU (from fireplaces) = 295,000 BTU.

With the total BTU demand known, reference tables for gas pipe sizing can be used to determine the correct diameter of the gas tube needed to properly supply this load without causing pressure issues. The chart is based on the total BTU load, the length of the run from the meter to the appliances, and the gas pressure.

The 1-1/4 inch diameter pipe is commonly suitable for carrying around 300,000 BTUs for specific

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy