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

You’ll find a wide variety of affordable and energy efficient gas furnaces at Nisair Air Conditioning in Stuart. Our Merit Series products have earned high annual fuel utilization efficiency (AFUE) ratings, which measure how efficiently the equipment converts fuel to energy. Each model is also made for reliability and a long product life, offering a cozy and comfortable home when it’s cold outside. See details about each system below, and call us at 772-318-4252 or set up an appointment online to talk to one of our team members a gas furnace replacement for your home.

ML195 Gas Furnace

You don’t always have to spend a fortune on highly energy efficient products that can save you hundreds on your utility bills. Our ML195 gas furnace is affordable for nearly 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 for improved comfort and softer operating sounds
  • Stainless steel secondary heat exchanger – enables the furnace to realize higher efficiency levels by capturing extra heat
  • SureLight® ignitor allows reliable operation and helps extend the product’s 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 you’re looking for reliability in a gas furnace for your Stuart area home, the ML193, which is full of features to improve reliability, is for you. Its Duralok Plus® heat exchanger, SureLight® ignitor and durable steel cabinet all constructed with materials that help ensure high reliability and longer product life. And, with an AFUE rating* of 93%, this energy efficient gas furnace can help reduce those monthly energy 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 – helps improve energy efficiency and reliability
  • 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*, meaning the unit efficiently converts energy into heat, and the sealed blower compartment traps this heat to decrease losses and maximize efficiency. To add to its great features, this product is also affordably priced to fit nearly any budget.

  • Insulated blower compartment for a quiet operation and a more peaceful home
  • Dual-fuel capability allows you to connect the furnace with an electric heat pump and alternate between gas and electric heat for the most efficient energy use possible
  • 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: $

Nisair Air Conditioning can help with all your gas furnace replacement needs. If you’re in need of gas furnace repairs or maintenance in Stuart, our staff has you covered. Give us a call at 772-318-4252 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.