Goodman - 80,000 BTU 80% Variable Speed Gas Furnace - 21" Width - Downflow / Horizontal - Two Stage - 115V - R32 - GDVT800805CX

Goodman - 80,000 BTU 80% Variable Speed Gas Furnace - 21" Width - Downflow / Horizontal - Two Stage - 115V - R32 - GDVT800805CX

The GDVT800805CX gas furnace is from one of the top-of-the-line series by Goodman. Considered one of the best of the best, this furnace has a two stage burner and a variable speed blower motor. With the best durability and reliability that Goodman 80% efficient furnaces have to offer, and a lower emissions output to match the low NOx compliance regulations in California, we are proud to offer you the Goodman GDVT800805CX gas furnace.

Features

• This furnace is ideal to heat a medium-size house (in average climate conditions)
• 80,000 BTU 80% AFUE two stage variable speed natural gas furnace
• Low NOx Compliant
• Requires metal flue venting
• Can be used in the downflow or horizontal orientation
• Can be converted to propane with an LP conversion kit (sold separately)
• Innovative design for electrical efficiency, safety, and lower sound output
  

Specifications

Manual

• Installation Manual
• Specifications Sheet
  

What our Experts Think

• Balanced Comfort with Variable‑Speed & Two‑Stage Heat
  The Goodman GDVT800805CX is an 80,000 BTU, 80 % AFUE gas furnace that combines a two‑stage gas valve with a variable‑speed ECM blower to deliver smoother, quieter heat and more consistent indoor temperatures than traditional single‑stage units.

• Integrated Smart Controls & Diagnostics
  With ComfortBridge™ communicating technology and CoolCloud™ Bluetooth commissioning/diagnostics, this model makes system setup and service easier for installers and HVAC pros while helping optimize performance.

• Quiet, Efficient Airflow Operation
  The variable‑speed blower gently ramps airflow up or down based on heating demand, yielding quieter operation, improved humidity management, and balanced comfort distribution across living spaces.

• Low NOx & R32‑Compliant Design
  Built to meet Low NOx emissions standards and compatible with R‑32 refrigerant systems, this furnace suits modern HVAC requirements and helps minimize environmental impact.

• Durable Construction & Smart Diagnostics
  A heavy‑duty aluminized steel tubular heat exchanger, SureStart® silicon nitride igniter, and self‑diagnostic control board support long‑lasting performance and easier service troubleshooting.

• Flexible Installation Options
  Its multi‑position design works in downflow or horizontal orientations, fitting a variety of home layouts and installation configurations with convenient left/right connections for gas and electrical service.

Q&A

Q1: What size and efficiency does this furnace deliver?
A: The Goodman GDVT800805CX delivers 80 000 BTU input heating with an 80% AFUE rating, meaning it converts most of the fuel into heat for efficient performance in medium‑sized homes.

Q2: What heating stages and motor technologies does it include?
A: It features a two‑stage gas valve combined with a variable‑speed ECM blower motor, resulting in quieter, more consistent heat and smoother airflow compared with single‑stage or single‑speed models.

Q3: What installation orientations are supported?
A: This furnace supports downflow or horizontal installation, making it versatile for attics, crawl spaces, and closets where space or duct layout demands change.

Q4: What is the fuel type and emissions rating?
A: It runs on natural gas (convertible to propane with an optional kit) and is Low NOx compliant, producing lower nitrogen‑oxide emissions in many regions.

Q5: What are the key construction features?
A: The unit includes a heavy‑gauge steel cabinet, durable heat exchanger, silicon nitride igniter, and self‑diagnostic control board with ComfortBridge™ compatibility for system communication and diagnostics.

Q6: What electrical requirements does it have?
A: It runs on 115 V single‑phase power with electrical protection typically sized based on local installation requirements.

Q7: What are the blower and airflow capabilities?
A: The variable‑speed blower can deliver up to ~2 000 CFM, adjusting airflow to match heating and cooling demands for improved comfort and quieter operation.

Maintenance Tips

• Replace Air Filters Every 1–3 Months – Clean filters ensure proper airflow, protect the blower and heat exchanger, and support quiet, efficient variable‑speed heating. Dirty filters can reduce system efficiency and lead to higher operating costs.

• Annual Professional Inspection – A qualified HVAC technician should check burners, heat exchanger, ignition system, gas pressure, and venting each fall to maintain safe, efficient two‑stage operation and long equipment life.

• Check Area & Vent Clearance – Keep at least 2–3 ft of clear space around the furnace and ensure intake/exhaust vent paths remain free of obstructions like dust, debris, or blockages.

• Inspect Electrical & Control Components – During service, have the technician tighten electrical connections, check the variable‑speed ECM motor, ComfortBridge™ controls, and diagnostic system for reliable operation.

• Test Thermostat & Safety Devices – Verify thermostat accuracy and test safety devices (limit switches, CO detectors) to ensure proper staging and safe combustion.

• Document Maintenance – Log filter changes and professional services to support warranty and track long‑term performance.