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Rheem

Rheem documents high-efficiency gas furnaces including the R98V and the Endeavor Line R98MV, both modulating, variable-speed units near 98 percent AFUE.

Rheem publishes product information for its most efficient gas furnaces. This entry records what Rheem's own pages state about the R98V and the Endeavor Line R98MV, including efficiency, gas valve behavior, and blower motor type.

R98V efficiency, gas valve, and blower

Rheem's furnace page states the R98V carries a 98 percent Annual Fuel Utilization Efficiency (AFUE) rating. Rheem presents the R98V as its most efficient gas furnace.

Rheem's page states the R98V uses a modulating gas valve together with variable-speed blower motor technology, which it says adjusts automatically to deliver a more consistent indoor environment and maximum heating efficiency. Both the gas valve behavior and the blower type are recorded as written on Rheem's page.

Endeavor Line R98MV specifications

Rheem's building information (BIM) product listing for the R98MV Endeavor Line furnace states a 98.1 percent AFUE in its specifications table and notes 98 percent AFUE across all model sizes.

Rheem's R98MV listing describes a modulating heating stage with gradual auto-adjustment from low to 100 percent of capacity. The same listing describes a Constant CFM Motor that it characterizes as truly variable speed technology.