Question

what is the annual operating cost for a 125,000 sf building that uses 15000 btu/sf/year and the gas cost is $0.25/mmbtu?

Answer 1

Answer: $ 468.75

Solution:

Step 1. Find the amount of gas used per year.

Given that

• Area of Building = 125,000 sf
• Gas Used = 15000 btu/sf/year

So, for the given building amount of gas used per year = Area of Building (in sf) x Gas Used per sf

=> = 125,000 sf x 15000 btu/sf/year

=> = 1875000000 btu per year

Step 2. Convert btu per year to mmbtu per year.

1 btu = 0.000001 mmbtu

So, 1875000000 btu per year = 1875000000 x 0.000001 mmbtu per year

=> = 1875 mmbtu per year

Step 3. Find Annual Operating Cost.

Cost of 1 mmbtu gas = $ 0.25

So,

Annual Operating Cost = amount of gas used per year (in mmbtu) x Cost of 1 mmbtu gas

=> = 1875 mmbtu per year x $ 0.25 per mmbtu

=> = $ 468.75 per year