Tired of Expensive Furnace Repairs Each Year?

Up to 63% of Furnace Repairs can be Prevented with Proper Annual Maintenance and the Average Life is Extended by 7 Years!” When it comes to furnace maintenance many companies only have 1 option. I have found that our clients want options based upon their needs. That’s why we have 4 levels of service for your maintenance needs. Every service we provide is completed by our highly skilled, trained technicians that have been background checked and drug tested. My ambassadors of service are standing by to provide you with above & beyond service! And remember, there is no risk to you, if you do not see the value in our maintenance; I will gladly refund 100% of your investment with no hard feelings! Your service comes with 5 Iron Clad Guarantees!

Our Client Care Representatives are available 24 hours a day, 7 days a week at 515-657-6634 to answer any questions and/or schedule your Furnace Maintenance/Tune Up. You may also select your service level from the options below and schedule online. Be sure to ask about our Club Membership Program for additional Savings!

Please indicate filter size when scheduling.

Brian Leech

Schedule Your Tune-Up Online

Tune Up Type
Date *
Filter Size / Comments

  1. Infrared Inspection of Heat Exchanger
  2. Pre-Check Temperature Differential
  3. Inspect Combustion Venting
  4. Clean & Test Blower Motor
  5. Chemically Clean Blower Wheel
  6. Measure Microfarads of Capacitor
  7. Inspect Wiring & Connections
  8. Measure Airflow and Static Pressure
  9. Evaluate Evaporator Coil Condition
  10. Clean Condensate Drain System
  11. Measure Filtration Performance
  12. Test Visible Gas Line for Leaks
  13. Inspection of Ductwork Cleanliness
  14. Clean Blower Cabinet of Furnace
  15. Replace Thermostat Batteries
  16. Measure Relative Humidity of Home
  17. Inspect Intake & Exhaust System
  18. Test for Proper Combustion Air
  19. Clean and Inspect Burners
  20. Clean & Inspect Flame Sensor
  21. Verify System Efficiency & Performance
  22. Clean & Test Ignition System
  23. Replace Thermocouple
  24. Clean & Inspect Pressure Switch Hoses & Ports
  25. Clean Condensation Collector Box & Exhaust Drain
  26. Test Inducer Motor Operation & Amp Draw
  27. Calibrate & Check Gas Pressures
  28. Test All Safety & Limit Switches
  29. Visual Inspection of Water Heater
  30. Post-Check Proper System Operation

  1. Infrared Inspection of Heat Exchanger
  2. Pre-Check Temperature Differential
  3. Inspect Combustion Venting
  4. Clean & Test Blower Motor
  5. Measure Microfarads of Capacitor
  6. Inspect Wiring & Connections
  7. Measure Airflow and Static Pressure
  8. Evaluate Evaporator Coil Condition
  9. Clean Condensate Drain System
  10. Measure Filtration Performance
  11. Test Visible Gas Line for Leaks
  12. Inspection of Ductwork Cleanliness
  13. Clean Blower Cabinet of Furnace
  14. Measure Relative Humidity of Home
  15. Clean and Inspect Burners
  16. Clean & Inspect Flame Sensor
  17. Verify System Efficiency & Performance
  18. Clean & Test Ignition System
  19. Clean & Inspect Pressure Switch Hoses & Ports
  20. Clean Condensation Collector Box & Exhaust Drain
  21. Test Inducer Motor Operation & Amp Draw
  22. Calibrate & Check Gas Pressures
  23. Test All Safety & Limit Switches
  24. Post-Check Proper System Operation

  1. Infrared Inspection of Heat Exchanger
  2. Pre-Check Temperature Differential
  3. Inspect Combustion Venting
  4. Test Blower Motor
  5. Measure Microfarads of Capacitor
  6. Inspect Wiring & Connections
  7. Evaluate Evaporator Coil Condition
  8. Inspect Condensate Drain System
  9. Measure Filtration Performance
  10. Test Visible Gas Line for Leaks
  11. Inspect Burners
  12. Inspect Flame Sensor
  13. Test Ignition System
  14. Inspect Pressure Switch Hoses & Ports
  15. Test Inducer Motor Operation & Amp Draw
  16. Check Gas Pressures
  17. Test All Safety & Limit Switches
  18. Post-Check Proper System Operation


*Please indicate filter size when scheduling.


The SAVE-Certified technician that we send to your home will begin with a series of tests that determine the furnace or air conditioner’s current performance levels. This must be done before any work begins on the Tune Up. The reason for this pre-test is that our technician and you know how much improvement the tune up makes on the delivered performance of the system.

For the Geeks Out There That Really Want to Know: Measuring Your HVAC Systems Performance

dirty fan wheel

The pre-test of your furnace or air conditioner consists of taking measurements of air speed and air temperatures at the unit to determine how much hot air a furnace is creating or how much heat an air conditioner is removing in a home. Think of going to the Dr. for a checkup. The first thing they do is take your vitals, temperature, weight and blood pressure. The technician will measure the systems temperature the same way a doctor does. This reading will show how effectively a furnace heats air entering the filter to the air leaving the furnace after its been heated. This is called the temperature rise. When the air conditioner is being test in cooling mode your technician will measure how much heat is being removed by the indoor part of the central air conditioner which is called an evaporator coil. An evaporators primary function is to absorb heat and humidity from the air in the home and then to transfer that heat through the refrigeration process to the outside. This is of course called temperature drop. There are several measurements that are taken from the furnace and air conditioner to determine how much heat is being removed or put in to your home. The next measurement your heating and air technician will take is called a static pressure test. This measures how hard the fan is working to move the air throughout the home. Think of this as a Dr. testing your blood pressure. This test will tell your technician how restrictive the ductwork is or if the fan is working harder than it should to heat or cool the home. It will also show if the filters are too dirty or restrictive in the system. This measurement is taken for heating and cooling modes as the fan works at two different speeds most times depending on what mode the system is in. Proper static pressures are absolutely critical in the performance of an HVAC system. Imagine running a marathon while breathing through a straw, how effective could you really be? That’s what happens with a heating and air conditioning system that does not have the proper air flow moving through it. Restricted airflow can be caused by dirty or undersized filters, improperly sized ductwork and dirty equipment. The final calculation determines the amount of heat delivered in the home in comparison with the rated capacity of the furnace relative to the temperatures within the home during testing. For the air conditioner we would be calculating the amount of heat from your home relative to the outdoor ambient temperatures.

How are the Efficiency Adjustments Calculated?

A Home Comfort Hero will calculate measurement of current efficiency by a series of measurements. Each system has a “rated” efficiency of what it is supposed to operate at. For example if we were to test a 100,000 BTU furnace we also must calculate what the rated output is. If the furnace is designed to be 80% efficient it means we should see 80,000 BTU of heat produced by the furnace. If after our measurements we see that we are only producing 65,000 BTU of heat delivered from the furnace we can calculate 15,000 BTU is being wasted or not going to where it is supposed to. At this point it is obvious that the calculations indicate a significant improvement could be made to the system in performance. After completion of the furnace Tune Up we again measure the performance of the system to determine the improved output. For example the new measured BTU delivery is 75,000 after performing the furnace calibration and adjustments so we have improved the efficiency 12.5%.

♦ BTU Gained / Rated BTU in this case 10,000/80,000 = 12.5%

efficiency of furnace

Performing the calculations for the air conditioners improved efficiency are slightly different. The capacity to remove heat with an air conditioner changes based of the temperature outside. The cooler the air outside the less heat a central air conditioner can remove from inside the home. When a manufacture builds an air conditioner the rated size that they classify it at is based off of a certain outdoor temperature that calculated during the engineering of the air conditioner. If we test at any temperature other than that number we will get a different rated efficiency. Because of that reason manufactures have rated capacity charts for equipment based off the outdoor conditions. We simply record the conditions outside and use that to determine the rated capacity at the time of testing. For example if a 36,000 BTU cooling unit is rated at 36,000 on an 85 degree day, its capacity may be 30,000 on an 80 degree day. This means if we test the system when it is 80 degrees the most we can get for capacity would be 30,000 BTU. We use the same measurements of temperature change and fan performance to determine the delivered amount of cooling for the air conditioner as we did for the furnace. After we verify the operation we then are able to determine if we will be able to have the adjustments qualify for rebates. For example if our rated BTU is 30,000 based off current outdoor weather conditions and we only measure 23,000 btu delivered we know we have 7000 btu that is not being delivered to the home. When we perform the System Rejuvenation on the central air conditioner we make changes to the system efficiency and it improves the BTU of heat removed from the home to 28,000 BTU and we have now increased our efficiency by 23%.

♦ BTU Gained / Rated BTU 7000/30,000 = 23.33%

What Adjustments can be made to Increase the Efficiency?

To gain efficiency is not an easy task. Being able to test the system is much easier than being able to improve the systems performance. The steps we use are similar to how a Dr. would improve your health based of the measurement that the Dr. takes when he first sees you. To explain better… The first measurement we take is the systems Temperature. Similar to at the doctor’s office. We know that a healthy person’s temperature should be about 98.6 degrees. A furnace has a recommended temperature output based off the model and type of furnace it is so we want to get the delivering supply temperature as close to that number as possible. We do this by making sure the furnace is bringing cleanly and completely. This can involve cleaning gas burners or calibrating the amount of gas entering the furnace. Once we know this is correct we move to the next step. The next step we take is the Static Pressure Measurements, like the blood pressure measurements the Dr. takes. If you have high blood pressure it is unhealthy the same way high static pressure is unhealthy for your furnace or central air conditioner. To correct high static pressures means sometimes cleaning the fan motor and fan blade that actually moves the air to reduce the amount of work it has to do. Often times cleaning the evaporator coil of the air conditioner will allow the proper amount of CFM (cubic feet per minute) of airflow. If the static pressure is high this may also doing duct modifications to the supply air plenum or the return air drop of the furnace. Think of a blocked artery in a heart. It causes high blood pressure. Sometimes it is minor and can be fixed with diet changes and exercise. Sometimes we can improve a systems performance performing high quality maintenance and cleaning procedures. A blocked artery may require a very in-depth surgery to correct as well which could be compared to changing or modifying the ductwork to allow better flow. With the air conditioner we do not calibrate the gas pressures, we calibrate the refrigerant levels. This means getting the proper airflow inside first and then adjusting the refrigerant to properly remove the heat as the manufacture designed it. This is done by measuring the amount of heat absorbed inside, which is called super heat. And measuring the amount of heat removed by the outside unit. This is called sub cooling. Each manufacture has specific design standards and each system is calibrated using different numbers. No one system is the same so the technicians doing the work must be well trained to make these adjustments. This is often a great challenge in our industry as technicians that are not trained properly will often over charge or undercharge the system. Even just a couple ounces of refrigerant either direction will significantly reduce the performance and efficiency of the air conditioner .


There is a lot that goes into making sure a homeowner will receive energy savings from tune up. Choosing the right company can be risky at best. At Service Legends each of our technicians are highly trained both in mechanical and communication skills to ensure that we exceed your expectations. In fact we have the highest Nate Certifications in the State of Iowa. We remove all of the risk for you by backing our work with Iron Clad Guarantees.