Otto's Furnaces
Acclimate™ 9.C Gas Furnace
At last, home heating performance that hits your comfort
level--day in day out, season after season. And when a Otto's
furnace is properly matched with a Otto's
air conditioner or
air handler, you will enjoy extended system life and maximum
efficiency all year around!
Here's how it works:
Furnace design has advanced in recent years to be far safer and more efficient than older designs. This is the result of improvements in the burner, the ignition, and the blower motor. Furnace heating efficiency is measured by an Annual Fuel Utilization Efficiency (AFUE) percentage. A higher AFUE percentage indicates a more efficient furnace.
The Acclimate™ 9.C is the highest rated gas furnace in the industry (up to 98% AFUE). The EnergyGuide label outlines the energy use and efficiency of major home appliances. With its industry leading efficiency, the Acclimate™ 9.C EnergyGuide rating exceeds government standards - ensuring exceptional quality and low energy use.
The basic components of a furnace system are:
Furnace design has advanced in recent years to be far safer and more efficient than older designs. This is the result of improvements in the burner, the ignition, and the blower motor. Furnace heating efficiency is measured by an Annual Fuel Utilization Efficiency (AFUE) percentage. A higher AFUE percentage indicates a more efficient furnace.
The Acclimate™ 9.C is the highest rated gas furnace in the industry (up to 98% AFUE). The EnergyGuide label outlines the energy use and efficiency of major home appliances. With its industry leading efficiency, the Acclimate™ 9.C EnergyGuide rating exceeds government standards - ensuring exceptional quality and low energy use.
The basic components of a furnace system are:
- A burner, where gas (natural or propane) or oil is delivered and burned
- An ignition source, which is typically an electronic hot surface igniter that supersedes the old-style pilot light
- A heat exchanger, where the heat from the burning gas is transferred to the air distribution system
- Blower motor, such as the highly efficient electronically commutated motor (ECM) to propel air through the ductwork
- Filtration and ductwork to circulate clean, warm air throughout the home
- A flue or vent pipe to exhaust by-products of combustion (such as water vapor and carbon dioxide) outside. High-efficiency furnaces use special, corrosion-resistant vent-pipe materials.
Acclimate 9.C and 8.C Series Gas Furnaces

Finally, get heating performance that hits your comfort level
with Acclimate™ 9.C and 8.C gas furnaces. They provide the
ultimate in home comfort, because they can match your degree of
comfort by firing at increments of 1% to provide the optimum
level of heating.
The Acclimate™ 9.C is the highest AFUE rated gas furnace in the industry, which means more efficiency and lower energy costs.
The Acclimate™ 9.C is the highest AFUE rated gas furnace in the industry, which means more efficiency and lower energy costs.
Match Your Comfort Level By Degrees
- Modulating design uses a firing rate at 1% increments to match comfort levels more exactly
- Both models use a variable-speed blower, which reduces electrical consumption
- Fewer starts and stops saves more fuel and operates more quietly
- Makes longer runtimes more affordable for more air infiltration to improve indoor air quality
- Adjustable for dry, temperate, or humid climates with GeoTrak™ technology
Warranties
Otto's HVAC backs every system with one of the best
limited warranties you’ll find: Every Acclimate 9.C & 8.C
gas furnace is backed with a lifetime limited warranty on
the heat exchanger. Both come with a 10-year limited
warranty on all other parts.
And, if you purchase any Otto's Acclimate series gas furnace with a matching Acclimate series two-stage air conditioner or heat pump, you'll receive our Performance Promise™ Plan: a 10-year limited parts warranty and a lifetime limited compressor warranty.
And, if you purchase any Otto's Acclimate series gas furnace with a matching Acclimate series two-stage air conditioner or heat pump, you'll receive our Performance Promise™ Plan: a 10-year limited parts warranty and a lifetime limited compressor warranty.
EnergyGuide
The Acclimate 9.C is up to 98% AFUE rated.
The Acclimate 8.C is 80% AFUE rated.
The EnergyGuide label gives you important information when you shop for a new appliance, including estimated energy consumption.
The Acclimate 8.C is 80% AFUE rated.
The EnergyGuide label gives you important information when you shop for a new appliance, including estimated energy consumption.
ENERGY STAR
Earning the ENERGY STAR means products meet strict energy
efficiency guidelines set by the U.S. Environmental
Protection Agency and the Department of Energy. When
compared to standard models, ENERGY STAR products are
between 15 and 25% more efficient. This model meets ENERGY
STAR requirements for energy efficiency.

