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A simple, single-stage furnace with 80% AFUE. It is reliable but less efficient, meaning higher monthly fuel bills than condensing models. : Milder climates or budget-conscious upgrades. Estimated Installed Cost : $3,200 – $5,200. Critical Buying Considerations

: Avoid "rule of thumb" sizing. Ensure your contractor performs a Manual J Load Calculation to determine the exact BTU capacity your home needs based on insulation, window types, and local climate. buy rheem furnace

Buying a Rheem furnace involves selecting a model that balances upfront costs with long-term energy savings. For a standard 2026 installation, most homeowners spend between for the unit and labor. Top Rheem Furnace Models (2026) A simple, single-stage furnace with 80% AFUE

Rheem R801T1255A24DZSNAS Classic 80% Gas Furnace, Single Stage, 125K BTU, 24.5 | Natural Gas | Central Furnace | Downflow Go to product viewer dialog for this item. Estimated Installed Cost : $3,200 – $5,200

: Since labor accounts for roughly 35% to 50% of the total cost, hiring a certified Rheem Pro Partner ensures the unit is installed to manufacturer specifications, protecting your warranty. Estimated Costs by Home Size (2026) Home Size (Approx.) Typical Furnace Size Estimated Installed Cost 1,200 sq ft 40k – 60k BTU $3,200 – $5,500 2,000 sq ft 60k – 80k BTU $4,000 – $7,200 3,000 sq ft 80k – 100k+ BTU $5,000 – $9,000 Source: Modernize HVAC Reviews A Quick Guide to Buying a New HVAC System - Rheem

A popular "just-right" pick, this two-stage furnace achieves 96% AFUE. It runs at a lower speed most of the time for efficiency but can kick into high gear on the coldest days.

This modulating furnace offers up to 98% AFUE efficiency. It provides the most consistent temperatures and operates quietly by adjusting its heat output in tiny increments. : Forever homes in very cold climates. Estimated Installed Cost : $5,500 – $9,000. Rheem Classic Plus R96V (Mid-Tier)