Heil Dc90 Ultra High Efficiency Furnace Manual

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Buying a new gas furnace is worrisome enough without having to deal with the pressure of knowing you might be without heat for a few days in the winter months. In the sections below, we’ve provided a list of the best high efficiency gas furnaces for your home during the 2019 and 2020 heating season. They were selected for many reasons including cost, efficiency, comfort and features, as well as furnace brand, warranty and historical reliability.

Almost all of the best high efficiency gas furnaces below have the added benefit of being listed on the EnergyStar Highest Efficiency Gas Furnaces of 2020 selection. Going into the new year, many of these same furnaces were the best furnace in 2019 as well, so plan ahead and get the right furnace with a long life ahead. They all operate at above a 95% AFUE and when properly installed, and promise the most value for you home heating budget.

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Brand and ModelFeatures
American Standard Platinum 95 Gas Furnace
  • Price: $$$$$
  • Up to 97.3% AFUE
  • 60,000 – 110,000 BTU
  • Modulating Gas Valve
  • Variable Speed Blower
  • Acculink Communicating System Controls
  • Lifetime Warranty on Heat Exchanger
  • 10 Parts Warranty on Everything Else
  • Proven Brand Ratings
Bryant 987M Evolution
  • Price: $$$$$
  • Up to 98.3% AFUE
  • 60,000 – 120,000 BTU
  • 2-Stage Gas Valve
  • Variable Speed Blower
  • Evolution Control
  • Average of 20-22% Operating Savings over Standard Efficiency
  • Reliable Brand Ratings
Carrier 59MN7 Infinity 98 Series
  • Price: $$$$$
  • Up to 98.3% AFUE
  • 60,000 – 120,000 BTU
  • Very Quiet
  • Precise Modulating Gas Valve
  • Variable Speed Blower
  • Evolution Control
  • System
  • 10 Yr Parts / Lifetime Heat Exchanger Warranty
  • Reliable Brand Ratings
Lennox SL297NV Ultra Series with iComfort
  • Price: $$$$$
  • Up to 97.5% AFUE
  • Ultra Low NOx Emission
  • Ultra Quiet Operation
  • 2-Stage Gas Valve
  • Variable Speed Blower
  • iComfort Smart Thermostat
  • 5 Yr Parts / Lifetime Heat Exchanger Warranty
  • Reliable Brand Ratings
Lennox SLP98V Series with iComfort
  • Price: $$$$$
  • Up to 98.7% AFUE
  • Ultra Quiet Operation
  • Modulating Gas Valve
  • Variable Speed Blower
  • 10 Yr Parts / Lifetime Heat Exchanger Warranty
  • Reliable Brand Ratings
Rheem Prestige R98V Series with EcoNet Control
  • Price: $$$$$
  • Up to 98.7% AFUE
  • Ultra Quiet Operation
  • Modulating Gas Valve
  • ECM Variable Speed Blower
  • Built-In Safeguards to Shut Down Furnace as Needed
  • 10 Year Warranty
  • Reliable Brand Ratings
Trane XC95m Gas Furnace
  • Price: $$$$$
  • Up to 97.3% AFUE
  • Most Efficient Trane Gas Furnace
  • 60,000 – 120,000 BTU
  • Modulating Gas Valve
  • Variable Speed Blower
  • ComfortLink Controls
  • Very Reliable Brand Ratings

High Efficiency Furnace Buying Guide

If you’re an energy and budget conscious consumer, buying one of the best high efficiency furnaces available should appeal to you. The new furnace cost is going to be higher than standard efficiency, but the annual operating costs are going to be significant lower than lower efficiency models. If you live in an area where you heat more than you cool your home, you’re going to save considerably every time the furnace runs!

Dc90 Ultra High Efficiency Furnace

This high efficiency furnace buying guide is her to help you understand features and performance. Hopefully, you too will realize the benefit of installing a high efficiency furnace.

Dual Chamber Heat Exchangers

Standard efficiency furnaces use a single tubular or ribbon style heat exchanger. High efficiency models use a multi-chamber heat exchanger, assuring that the fuel gets burned more efficiently and you get more value for your heating money.

Benefit: Dual, or Multi-chamber Heat Changers burn the fuel more efficiently.

Variable Speed Blowers / ECM Blowers

Standard furnaces use a single speed, or at most a multi-speed blower that allows you to manually set the amount of airflow in your duct system. High efficiency furnace use variable or modulated speed blowers, that automatically adjusts to the heating needs of your home and sends the right amount of airflow to keep the temperature perfect, or within 1 degree at all times.

Benefit: Variable or ECM blowers use less energy and keep the indoor air temperature at a much more comfortable setting. This helps avoid short/long cycling, and saves money on electricity.

Furnace Ignitors / Startup Systems

Older furnaces used to use pilot lights to fire off the furnace. Eventually that changed to hot surface ignitors, which are similar to a glow plug of sorts, providing the needed flame to ignite the gas coming out of the valve. Today’s high efficiency furnaces use an electronic ignition system that only sparks when the furnace is being lit.

Benefit: Electronic ignitors only fire as needed. They don’t glow and waste electricity, or burn non-stop wasting natural gas like a pilot system.

Multi-Stage and Modulating Gas Valves and Burners

Standard furnaces generally use single stage gas valves. This means they are on or off, flowing the same amount of natural gas all the time they are lit or burning.

Multi-stage or modulating gas valves can automatically sense how much heat you need based on the thermostat, and run at a lower or higher setting, based on the need in your home. If your thermostat only calls for a 2-degree rise in temperature, the valve will run on low, along with the lower speed fan, delivering the right amount of heated air to your home more efficiently.

Heil Dc90 Ultra High Efficiency Furnace Manual Transfer Switch

Benefit: Instead of all-on like a single stag valve, 2 or more stage gas valves use much less gas making them much higher in efficiency.

Smart Communication Systems and Monitoring

Standard furnaces can use smart thermostats as well, but what they don’t do is communicate with them. High efficiency furnaces talk back and forth with their matching thermostat systems, reporting problems like an old air filter or airflow issues, high chamber temperatures, carbon monoxide dangers, and much more.

Benefit: Communicating furnaces are much more intelligent than standard. They operate at higher degrees of accuracy and provide feedback to homeowners, catching and reporting small problems before they turn into big problems.

High Efficiency Furnace Cost and ROI

Lets face it, high efficiency furnaces cost more at the point of initial purchase, as well as installation. In most cases, you’ll spend almost twice the money for a high efficiency furnace over standard.

However, when it comes to operating costs of a high efficiency furnace, you’re going to save anywhere from 15-35% in monthly fuel expense. So, if you normally spend $100/month in the heating system on natural gas, you can expect to save $20-$35/month on your heating expenses with a high efficiency furnace.

Heil Dc90 Manual

Adding to the benefit, is that high efficiency heating systems are known to last longer as well. So if you get 20 years out of a high efficiency furnace, you can expect to save additional money versus having to replace it sooner.

The exact savings are something you should review with your HVAC specialist before making a purchase. They’ll know exactly how much each therm of gas costs, be able to review your past heating bills, and tell you a fairly specific estimate of how much a high efficiency furnace will save you each year.

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** Costs below include installation as well as a matching smart thermostat. They do not include central ac, accessories, etc.

Size (BTU’s)Standard EfficiencyHigh Efficiency Cost
40,000 – 60,000$2,190 Installed$3,850 Installed
60,000 – 80,000$2,720 Installed$4,390 Installed
80,000 – 100,000$3,280 Installed$5,150 Installed
100,000 – 120,000$3,690 Installed$5,900 Installed

Tempstar Dc90 Ultra High Efficiency

Where You Live Makes a Big Difference

High Efficiency Furnace Venting

Regardless of where you live in the USA, you’ll benefit from installing a high efficiency gas furnace. That said, it makes much more sense if you live in an area that uses heat more often.

Minimal Benefit / Lowest ROI – Places like Florida, Louisiana, and other states where heat is rarely used. Yes, you’ll still benefit from the high efficiency, but the initial expense will be hard to reclaim, due to lower usage.

Maximum Benefit / Highest ROI – Areas that use heat more than 4 months out of the year, will get the highest ROI from a high efficiency gas furnace. The simple reason for this is that you heat more often and thus save more money on fuel expense, reclaiming the higher cost a little bit each month the furnace is in use.

  • Choice Series: W801T (Upflow/Horizontal)

      (Not Available In Canada)
      • Constant Torque ECM Motor
      • 3 way multi poise design UF/HZ
      • Direct spark ignition —for reliability and longevity
      • 7-Segment LED on all units
      • Upflow/Horizontal Input Rates: 50-125 kBTU
      • Diagnostics

  • Choice Series: Up to 92% AFUE Constant Torque ECM Motor Multi Position (W92T)

    • 92% residential gas furnace CSA certified
    • 4 way multi-poise design
    • Constant Torque ECM Motor
    • Ignition System
    • Water Management System
    • Diagnostics

  • Ruud Achiever Plus Series Ultra Low NOx 80% AFUE R801T Upflow/Horizontal Gas Furnace

    • FIRST CERTIFIED, lowest emission furnace in the industry*
    • Industry - First, Ultra Low NOx Technology
    • Environmentally friendly and responsible
    • Eligible for the $500 SCAQMD CLEANair furnace rebate**
    • Single Stage, Same 34' Cabinet Height, Simple Technology
    • PlusOne™ Diagnostics: 7-Segment LED for faster and more accurate diagnostics
    • Plus One™ Ignition System: DSI for unmatched durability & years of worry free-operation
    • 360 Serviceability™ with a removable heat exchanger



    *The R801TA Ultra Low NOx Furnace was the first to be certified, in June 2016, by meeting the SCAQMD Rule 1111, as published in the SCAQMD Advisor, Volume 24 March/April 2017 issue.

    ** Refer to http://www.cleanairfurnacerebate.com for complete program and rebate details.


  • Achiever Series: 80% AFUE Downflow (R801C)

    • Single-stage
    • Constant Torque ECM Motor
    • Ruud-Exclusive PlusOne™ Ignition System
    • Industry-First PlusOne™ Diagnostics

  • Achiever Plus Series: 80% AFUE 2-Stage Upflow/Horizontal (R802T)

    • Three way multi poise design
    • Constant Torque Motor
    • Input Rates 50-150 kBTU
    • Ruud-Exclusive PlusOne™ Ignition System
    • Industry-First PlusOne™ Diagnostics

  • Choice Series: 80% AFUE Downflow (W801C)

    • Constant Torque electrically commutated motor
    • Ignition System
    • Diagnostics

  • EcoNet™ Ultra® Series Modulation Upflow Gas Furnace (U98V)

    • EcoNet™ Enabled
    • ECM Motor
    • Modulating operation
    • Ruud-Exclusive PlusOne™ Ignition System
    • Ruud-Exclusive PlusOne™ Water Management System
    • Industry-First PlusOne™ Diagnostics

  • Choice Series: 80% AFUE 2-Stage Upflow/Horizontal (W802T)

    • Three way multi poise design
    • Constant Torque Electrically Commutated Motor
    • Input rates 50-150 kBTU

  • Choice Series: Up to 96% AFUE Constant Torque ECM Motor Multi Position (W96T)

    • 96% AFUE Ratings
    • 4 way multi-poise design
    • Input rates from 40 to 115 kBTU
    • Two-stage Constant Torque ECM Motor
    • Ignition System
    • Water Management System
    • Diagnostics

  • Choice Series: Single Stage Multi Position (W95T)

    • Constant Torque ECM Motor
    • 95% AFUE Ratings
    • 4 way multi-poise design
    • 7-Segment LED on all units
    • Diagnostics
    • Direct Spark Ignition System
    • Water Management System

  • Achiever Series: 80% AFUE Upflow/Horizontal (R801C)

    • Three way multi poise design
    • Constant Torque ECM Motor
    • Ruud-Exclusive PlusOne™ Ignition System
    • Industry-First PlusOne™ Diagnostics

  • W801T Ultra Low NOx Upflow/Horizontal

    • Environmentally friendly and responsible product reducing NOx emissions by 65%**
    • Single Stage, Same 34' Cabinet Height, Simple Technology
    • Diagnostics: 7-Segment LED for faster and more accurate diagnostics
    • Ignition System: DSI for unmatched durability & years of worry-free operation

  • Ultra Series EcoNet Enabled Modulating Downflow/Horizontal Gas Furnace (U97V)

      97% AFUE residential gas furnace

      Modulating operation to save energy and maintain optimal comfort level

      Plus One Diagnostics

      Plus One Ignition System - Direct Spark Ignition for reliability and longevity

      Plus One Water Management System with patented Blocked Drain Sensor

  • Choice Series: 80% AFUE Upflow/Horizontal (W801C)

    • Three way multi-poise deign
    • Constant Torque Motor
    • Ignition System - DSI for reliability and longevity
    • Diagnostics - 7 Segment LED all units

  • Choice Series: W801T (Downflow)

      (Not Available In Canada)
      • Constant Torque ECM Motor
      • 80% residential Gas Furnace CSA certified
      • Direct spark ignition —for reliability and longevity
      • 7-Segment LED on all units
      • Downflow Input Rates: 75-125 kBTU
      • Diagnostics

  • EcoNet™ Enabled Ultra® Series Variable Speed Multi Position (U96V)

    • 96% residential gas furnace CSA certified
    • 4 way multi-poise design
    • ECM Motor
    • Two-stage operation
    • Ruud-Exclusive PlusOne™ Ignition System
    • Ruud-Exclusive PlusOne™ Water Management System
    • Industry-First PlusOne™ Diagnostics

  • Ultra Series: Up to 80% AFUE Variable Speed Downflow (U802V)

    • Two-stage operation
    • EcoNet™ enabled
    • Ruud-Exclusive PlusOne™ Ignition System
    • Industry-First PlusOne™ Diagnostics


  • EcoNet™ Enabled Ultra® Series Variable Speed Upflow/Horizontal (U802V)

    • Two-stage operation
    • EcoNet™ enabled
    • Ruud-Exclusive PlusOne™ Ignition System
    • Industry-First PlusOne™ Diagnostics

  • Achiever Plus Series: Up to 96% AFUE Constant Torque ECM Motor Multi Position (R96T)

    • Up to 96% residential gas furnace CSA certified
    • 4 way multi-poise design
    • Constant Torque ECM Motor
    • Ruud-Exclusive PlusOne™ Ignition System
    • Ruud-Exclusive PlusOne™ Water Management System
    • Industry-First-PlusOne™ Diagnostics

  • Achiever Plus Series: Up to 96% AFUE PSC Motor Multi Position (R96P)

    • Up to 96% residential gas furnace CSA certified
    • 4 way multi-poise design
    • PSC Motor
    • Ruud-Exclusive PlusOne™ Ignition System
    • Ruud-Exclusive PlusOne™ Water Management System
    • Industry-First-PlusOne™ Diagnostics

  • Achiever Series: Up to 95% AFUE ECM Motor Multi Position (R95T)

    • 95% residential gas furnace CSA certified
    • 4 way multi-poise design
    • ECM Motor
    • Models R95TA060 and R95TA115 gas furnaces have earned the ENERGY STAR in the U.S. and Canada
    • Ruud-Exclusive PlusOne™ Ignition System
    • Ruud-Exclusive PlusOne™ Water Management System
    • Industry-First PlusOne™ Diagnostics

  • Achiever Plus Series: Up to 92% AFUE Constant Torque ECM Motor Multi Position (R92T)

    • 92% residential gas furnace CSA certified
    • 4 way multi-poise design
    • Constant Torque ECM Motor
    • Ruud-Exclusive PlusOne™ Ignition System
    • Ruud-Exclusive PlusOne™ Water Management System
    • Industry-First PlusOne™ Diagnostics

  • Achiever Plus Series: 80% AFUE 2-Stage Downflow (R802P)

    • PSC Motor
    • Two stages of operation to save energy and maintain optimal comfort level
    • Ruud-Exclusive PlusOne™ Ignition System
    • Industry-First PlusOne™ Diagnostics

  • Achiever Plus Series: 80% AFUE 2-Stage Upflow/Horizontal (R802P)

    • Three way multi poise design
    • PSC Motor
    • Input rates 50-150 kBTU
    • Ruud-Exclusive PlusOne™ Ignition System
    • Industry-First PlusOne™ Diagnostics

  • Achiever Series: 80% AFUE Downflow (R801T)

    • Single-stage
    • Constant Torque ECM Motor
    • Ruud-Exclusive PlusOne™ Ignition System
    • Industry-First PlusOne™ Diagnostics

  • Achiever Series: 80% AFUE Upflow/Horizontal (R801T)

    • Three way multi poise design
    • Constant Torque ECM Motor
    • Ruud-Exclusive PlusOne™ Ignition System
    • Industry-First PlusOne™ Diagnostics

  • Achiever Series: Up to 95% AFUE PSC Motor Multi Position (R95P)

    • 95% residential gas furnace CSA certified
    • 4 way multi-poise design
    • PSC Motor
    • Ruud-Exclusive PlusOne™ Ignition System
    • Ruud-Exclusive PlusOne™ Water Management System
    • Industry-First PlusOne™ Diagnostics

  • Achiever Series: Up to 92% AFUE PSC Motor Multi Position (R92P)

    • 92% residential gas furnace CSA certified
    • 4 way multi-poise design
    • PSC Motor
    • Ruud-Exclusive PlusOne™ Ignition System
    • Ruud-Exclusive PlusOne™ Water Management System
    • Industry-First PlusOne™ Diagnostics

  • Achiever Series: 80% AFUE Downflow (R801P)

    • Single-stage
    • PSC Motor
    • Ruud-Exclusive PlusOne™ Ignition System
    • Industry-First PlusOne™ Diagnostics

  • Achiever Series: 80% AFUE Upflow/Horizontal (R801P)

    • Single-stage
    • Three way multi poise design
    • PSC motor
    • Ruud-Exclusive PlusOne™ Ignition System
    • Industry-First PlusOne™ Diagnostics

  • Achiever Series: 80% AFUE Downflow (R801S)

    • Single-stage
    • PSC Motor
    • Ruud-Exclusive PlusOne™ Ignition System
    • Industry-First PlusOne™ Diagnostics

  • Achiever Series: 80% AFUE Upflow/Horizontal (R801S)

    • Single-stage
    • Three way multi poise design
    • PSC Motor
    • Rheem-Exclusive PlusOne™ Ignition System
    • Industry-First PlusOne™ Diagnostics