FAQs

Q: How often should I service my HVAC system?
A: To keep your HVAC system running as efficiently as possible, we recommend a maintenance appointment twice a year (once for summer to check out your cooling ability, and once for winter to check out your heating system). This way, a Duncan’s technician can check your filters, coils, wiring, housing, motor, and more to make sure you’re getting the most out of your system.

Q: What happens when I need a repair on a holiday or weekend?
A: Whether your problem happens at three in the morning or on the 4th of July, our HVAC service experts are available 24 hours a day, 7 days a week to keep your system running. After hours charges will apply.

Q: What’s the warranty like on a new HVAC system?
A: At Duncan’s, most of our HVAC systems come with a Limited 10-year warranty for residential installs so you can enjoy your system for years to come. Commercial applications may differ. We also have great maintenance plans to help you lower your utility bills and extend the life of your equipment. We as a company also offer a more comprehensive warranty for our customers that sign up for and keep up with a maintenance agreement at the time of installation completion.

Q: Which HVAC System is right for my Home?
A: To answer that, you’ll need a site survey with one of our HVAC service experts to determine which option is best for your individual situation. We’ll come to your home and evaluate its size, heating and cooling needs, environment, and the work we’ll need to do. Then, we can recommend the best system for you and install it quickly.

Q: What can I do to lower my energy bills?
A: There are plenty of things, such as:

  • Install a programmable thermostat so you don’t waste air conditioning or heat while you’re not at home.

  • Don't turn your ac completely off to let the temperature rise unchecked. Simply raise or lower the temperature 5 or 10 degrees from where you normally keep it. This will prevent exceptionally long run times with high power draw levels of your ac system to catch up. (Leaving town for more then 2 days is the exception to this)

  • Switch your incandescent light bulbs to more energy efficient light bulbs like compact fluorescents (CFLs) or LEDs.

  • Instead of using air conditioning, install and use ceiling fans where and when you can to cool you down.

  • Unplug any appliance that you’re not using. While it may not be turned on, it will still draw power from your electrical outlet in most cases.

  • Make sure your windows and doors are sealed properly so that they don’t let air in or out and make your HVAC system work harder.

Q: How do I know if I need a new heater or air conditioner?
A: If your HVAC system requires constant repairs, is 15 years or older, or can’t heat or cool your home properly, we recommend you replace it. When an HVAC system ages, it doesn’t operate as efficiently and could actually end up costing you more money than it should. It may even be to a point where you could have already paid for that shiny new system. Modern ac systems are built and operate with significantly higher efficiency ratings then even just 10 years ago.

Q: How do I choose a good HVAC service company?
A: When looking for the perfect company, ask your friends and family members for recommendations. Who they used and how were they treated is an important part. Did they feel the technician was honest and treated them fairly? Make sure the company has the proper license and insurance. After that, get a written estimate for the work they’re going to do.

Q: How much will it cost me to have you come out and fix my air conditioning system?
A: A number of variables go into that question, which makes it impossible to answer.

  • What is wrong with it is first and foremost. Without actually seeing the system and finding the problem, there's no way to tell. It could be a simple fix of a burned wire that needs a new connector put on it. It could also be a burned out compressor that contaminates the entire system with high acid levels. Without diagnosing the problem properly, the price could simply be that of a service call fee or that of a complete system change out.

  • What brand of equipment do you have? Prices for repair parts vary widely and the location of the part supplier can lead to wait times and shipping charges if it isn't available locally.

  • What is the size of the equipment? Bigger equipment uses bigger parts and generally is a little more expensive to fix. Unfortunately, about 80% of homeowners are unaware of the actual size of their equipment. By size, we mean capacity, not the actual physical size. Physical size is actually not as representative of cooling or heating capacity as most people think.

Q: What is a SEER?
A: SEER stands for Seasonal Energy Efficiency Ratio. It is used to measure the efficiency of a central air conditioning system. The higher the SEER rating, the more efficient the unit and the less electricity it uses.

Q: What does HSPF stand for?
A: HSPF stands for Heat Seasonal Performance Factor, which measures a heat pump’s heating efficiency. The higher the HSPF, the more efficient the heat pump. More technically speaking, the HSPF represents the total heating output of a heat pump during the normal heating season, as compared to the total electricity consumed during that same period.

Q: What does AFUE stand for?
A: Gas furnaces are rated according to their Annual Fuel Utilization Efficiency, or AFUE. The AFUE rating measures how efficiently a gas furnace converts fuel to energy. The higher the AFUE rating, the more efficient the unit. A gas furnace with an AFUE of 95% is one of the highest efficiency gas furnaces you can buy on the market today. A furnace with an 80% AFUE is the baseline standard efficiency rating.

Q: What does EER stand for?
A: The Energy Efficiency Ratio is known as the EER. It measures how efficiently a cooling system will operate when the outdoor temperature is at a specific level (95 degrees Fahrenheit). Like the SEER, HSPF, and AFUE, the higher the EER rating, the more efficient the unit.

Q: How often should I replace the filter?
A: There's no one single answer. The frequency of filter changes is affected by how often your heating and air conditioning system operates and the local air quality. In most cases, you will have to change your filter more often if you live in the country than if you live in the city. This is due to there being more dirt in the air. Start by checking the system's filters at least once a month. Hold the used filter up to the light and compare it to a clean "spare." When light is obscured by captured dust and dirt particles, the old filter should be changed. Keep a record for one year and then replace the filter on that basis. At a minimum, it is always a good idea to change filters at the start of the heating and cooling seasons and then in between as needed.