Merit® Series Gas Furnaces Provide Reliable Heat When You Need it Most

You’ll find a large collection of affordable and energy efficient gas furnaces at Custom Air Systems Inc in Port Saint Lucie. Our Merit Series products have earned high annual fuel utilization efficiency (AFUE) ratings, which measure how efficiently the equipment converts fuel to energy. These products are also made for reliability and a long product life, giving you the comfort you need throughout the coldest months of the year. Learn more about each system below, and call us at 772-335-3232 or set up an appointment online to learn about a gas furnace replacement for your home.

ML195 Gas Furnace

You shouldn’t have to break the bank buying highly energy efficient products that can help reduce your utility expenses. Our ML195 gas furnace is affordable for most all budgets and has earned an energy efficiency rating of 95% AFUE,* one of the highest available. This furnace is a nice option for impressive comfort, efficiency and reliability.

  • Sealed blower compartment improves comfort and helps minimize operating sounds
  • Stainless steel secondary heat exchanger – enables the furnace to achieve higher efficiency levels by capturing extra heat
  • SureLight® ignitor allows reliable operation and a longer product life
  • Duralok Plus® heat exchanger – made of patented aluminized steel to ensure reliability and efficiency
  • 20-Year Limited Warranty on heat exchanger
  • 5-Year Limited Warranty on covered components (this product may be eligible for valuable 10-year Limited Extended Warranty coverage)
ML195 Gas Furnace
Efficiency Rating (SEER): 95
Price Guide: $

ML193 Gas Furnace

If reliability is a top priority in a gas furnace for your Port Saint Lucie area home, you should note that the ML193 is packed with features that increase reliable performance. Its Duralok Plus® heat exchanger, SureLight® ignitor and durable steel cabinet all constructed with materials that help contribute to more reliability and longer product life. Finally, with an AFUE rating* of 93%, this energy efficient gas furnace can help you save on your monthly utility bills.

  • Sealed blower compartment for a quiet operation and less than 1% leakage at 1.0” ESP
  • SureLight® ignitor offers reliable operation
  • Duralok Plus® heat exchanger – to help increase reliability and efficiency
  • Dual-fuel capability – similar to a hybrid car, this system, when combined with an electric heat pump, will alternate between electric and gas heat for maximum efficiency
  • 20-Year Limited Warranty on heat exchanger
  • 5-Year Limited Warranty on covered components (this product may be eligible for valuable 10-year Limited Extended Warranty coverage)
ML193 Gas Furnace
Efficiency Rating (SEER): 93
Price Guide: $

ML180 Gas Furnace

Economical is the perfect word to describe the ML180 gas furnace. Its 80% AFUE efficiency rating* which means the unit efficiently converts energy into heat, and the sealed blower compartment traps this heat to reduce losses and boost efficiency. If that wasn’t good enough, this furnace is also affordably priced to fit nearly any budget.

  • Insulated blower compartment helps minimize operation noises and make your home more peaceful
  • Dual-fuel capability enables you to connect the furnace with an electric heat pump and alternate between gas and electric heat for optimal energy use and lower heating costs
  • Duralok Plus® heat exchanger increases reliability and efficiency
  • Hot surface igniter – controls operation to maintain a reliable and efficient performance
  • 20-Year Limited Warranty on heat exchanger
  • 5-Year Limited Warranty on covered components (this product may be eligible for valuable 10-year Limited Extended Warranty coverage)
ML180 Gas Furnace
Efficiency Rating (SEER): 80
Price Guide: $

Custom Air Systems Inc can take care of all your gas furnace replacement needs. If you’re needing gas furnace repairs or maintenance in Port Saint Lucie, our staff has you covered. Give us a call at 772-335-3232 or use our online scheduler to set up an appointment.


* Annual Fuel Utilization Efficiency (AFUE) measures how efficient the appliance is in converting its fuel’s energy into heat over the course of a year.