I know that the furnace is providing 70,000 btu output for a two bedroom apartment with about 20 ft of exterior wall surface. I am assuming a heat load of 30 btu/hr/sf and let's say there is 800 sf in the unit.
2007-03-21 10:07:24 · 5 answers · asked by mrmatz 1 in Home & Garden ➔ Maintenance & Repairs
Number of 65F degree days in Chicago: 5882 hrs per ASHRAE GRP 158 with a design temp of 70F
2007-03-21 10:35:30 · update #1
Well if you go through a rigorous analysis of heat loss for your apartment you can come up with a estimate of gas usage. Not enough info to do that.
What I would suggest is to read your gas meter at the start of the week and then find out the degree days in the week. The gas usage could be defined as ft3/degree day. Then find out the average degree days for the area that you are in. Multiply to give ft3 and then multiply to find out what the expected cost for the heating season is.
2007-03-21 10:32:46 · answer #1 · answered by RobertB 5 · 0⤊ 0⤋
Assuming that you are not talking about a newly constructed house the best way is to contact your gas provider and ask for a monthly breakdown of the fuel usage in cubic feet. They have those records.
That should be your answer.
a 70,000 btu furnace at 80% AFUE provides 56,00- btu of heat and your heat load is only 30,000. You most likely could have used a smaller furnace.
2007-03-22 00:13:23 · answer #2 · answered by Anonymous · 0⤊ 0⤋
That's hard to answer because it can only be a estimate i to stay in the chicagoland area southburbs very windy and cold the best u can do is avg off your therm usuage by going online to the gas company and see .U want to estimate because Gas bills are killing u u state 70000 btu output means close to 100000 input u have oversized furnace.My house 1800 sf 100000 input but need 60000.In old days everyone oversized.If u own add insulation if not talk to landlord about Energy Audit
2007-03-22 10:23:19 · answer #3 · answered by SEAN P 2 · 0⤊ 0⤋
If this is not new construction that you just moved into..call the gas company and ask them what the budget payment plan would be for that apartment..they have the last records of usage. The amount of gas is not going to be too helpful because Chicago just got a huge price increase..so they should able to help you budget that bill..
2007-03-21 17:47:16 · answer #4 · answered by gvh 3 · 0⤊ 0⤋
You can't do it. Usage is based on temperature. You can get an estimate from the people that installed it, but it will only be an estimate.
2007-03-21 17:11:36 · answer #5 · answered by saaanen 7 · 0⤊ 0⤋