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"We have the solutions for your Air Conditioning and Heating Needs."

How Much is Your Furnace Costing You?

How Much is Your Furnace Costing You?

How Much Does the Beast in the Basement Cost You?


In 1992, the federal minimum-efficiency standards for furnaces and chances are that its efficiency was only 55% to 65% when new. It's no longer new. Today, its efficiency is less than when it was new, due to performance degradation over time. If you have not been diligent about annual service, the performance degradation could be more.The Beast is a hungry beast. Find out how much it's eating out of your household budget and compare the savings from a furnace or boiler. All you need is a calculator, old utility bills, and this worksheet. If you do not have the utility bills, make your best estimate.

1. Determine Your Annual Fuel Costs

The first step is to identify how much you spend on gas or fuel oil annually.

Add up 12 months of gas/oil bills - OR - Estimate your average monthly gas/oil cost and multiply by 12

2. Determine Your Base Load Fuel Usage

Your furnace or boiler does not use all of your fuel. Some is used for hot water, cooking, and other tasks. This is the "base load" and can be determined from your lowest bill, which is typically a Summer bill when your heating system was not operating.

Find or estimate your lowest monthly fuel bill and multiply by 12:

3. Calculate Your Heating Costs

By subtracting the base load from the total fuel costs, you can identify how much you spend on heating each year.

Subtract the base load from the total fuel costs:

4. Estimate the Impact of Rising Fuel Prices (Optional)

Fuel prices are not static. Gas prices are expected to rise this year, possibly dramatically. You must take rising prices into account.

Estimate the percentage increase in gas or fuel oil:

Multiply the heating costs by (1 + % fuel increase):

5. Estimate the Efficiency of Your Furnace or Boiler

Remember, your heating system is not the same efficiency it was when it was new. You should account for the performance degradation.

Use the table below to estimate efficiency if unknown…

Efficiency Table
Date of Manufacture Efficiency
Before 1992 55% - 65%
On or After 1992 78% - 80%

Enter the efficiency of the furnace or boiler when new:

Use the table below to select the degradation factor (optional)…

Estimated Degradation Table (Optional)
 
Condition
Furnace Age
Good
Poor
6 to 10 Years
0.93
0.92
11 to 15 Years
0.91
0.88
16 to 20 Years
0.88
0.83
21 to 25 Years
0.86
0.79
26 to 30 Years
0.84
0.76

Multiply the efficiency when new by the degradation factor:

6. Compare the Cost of Ownership with a New Heating System

To determine the fuel cost for a new furnace multiply the fuel cost by the current heating system's efficiency and divide this by the new system's efficiency (e.g., New Fuel Cost = Current Fuel Cost X Current Efficiency / New Efficiency)

New
  Current System   Mid-Efficiency (78% to 80%) Cost Savings     5 Year Savings
Efficiency   -     = X 5 =  
Heating Fuel Cost   -     = X 5 =  
+ Today's Repair   - $0.00   = X 5 =  
= Ownership Cost   -     = X 5 =  
New
  Current System   Mid-Efficiency (90% to 97%) Cost Savings     5 Year Savings
Efficiency   -     = X 5 =  
Heating Fuel Cost   -     = X 5 =  
+ Today's Repair   - $0.00   = X 5 =  
= Ownership Cost   -     = X 5 =  

Note: With today's financing, it is possible that your monthly savings will exceed your payments.

© 2003 Service Roundtable

24 Hour Emergency Service (817) 421-4190 Fill Out Our Online Form
24 Hour Emergency Service
(817) 421-4190
Fill Out Our Online Form
Contact Information
 
Address:   950 E State Hwy 114 #160
Southlake, TX 76092
Phone: (817) 421-4190
Hours: Monday - Friday
8:00am - 5:00pm
Texas License: TACLB023486E
 
Payment Options
 
AC & Heat Solutions works with Lennox products in Grapevine TX We can fix and service your Carrier products in Grapevine TX. AC & Heat Solutions is an amana product expert. We specialize in Goodman product installation in Southlake TX. Ask us about our Westinghouse products and services! Get your Ruud Heater units service done in Southlake TX by AC & Heat Solutions Save money on York Heating service in Southlake TX. AC & Heat Solutions works with Bryant Heating and Cooling Systems Heater products in Grapevine TX. Trane Heater service in Keller TX is our speciality. Rheem Heater service in Southlake TX is our speciality. AC & Heat Solutions works with American Standard Heater products in Grapevine TX.
AC & Heat Solutions, ready to service your Furnace in Grapevine TX