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ACiQ 88,000 BTU Single Stage Gas Furnace

Reliable Gas Heating for Your Homestead or Cabin

88,000 BTU input — Delivers 70,400 BTUs of usable heat
18-speed ECM blower — Near-silent operation with constant torque
Multi-positional install — Upflow, downflow, or horizontal
Propane field-convertible — Runs on LP with optional kit
Metal vent ready — Uses existing metal flue systems
  • FREE System Design Consultation -- Engineers size your system for actual consumption
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Price range: $921.95 through $975.95

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ACiQ 88,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace
ACiQ 88,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace
$921.95 $975.95Price range: $921.95 through $975.95

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In the box

  • ACiQ 88,000 BTU 80% AFUE Gas Furnace
ACiQ 88,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace
ACiQ 88,000 BTU Single Stage Gas Furnace
$921.95 $975.95Price range: $921.95 through $975.95

Reliable Gas Heating for Your Homestead or Cabin

The ACiQ 88,000 BTU gas furnace delivers 70,400 BTUs of usable heat through a field-tested single-stage design built for reliable, grid-independent heating. Its 18-speed ECM blower motor operates near-silently with direct drive efficiency, while thicker cabinet insulation keeps noise contained. Configurable for upflow, downflow, or horizontal installation, this furnace is built-to-survive demanding conditions. Runs on natural gas out of the box with optional LP conversion. Requires metal venting per 80% AFUE rating.

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Multi-Positional Install
18-Speed ECM Blower
Thick Metal Cabinet
Natural Gas Ready
88,000
Input BTU Rating
80%
AFUE Efficiency
70,400
Usable Heat Output (BTUs)
Heating That Breaks the Utility Rate Cycle

Heating That Breaks the Utility Rate Cycle

Utility rate hikes hit hardest in winter, when electric resistance heating can push your bill past $400 a month. The ACiQ 88,000 BTU furnace breaks that cycle by converting natural gas directly into 70,400 BTUs of usable heat at 80% AFUE — no grid-dependent resistance coils. Off Grid Vault vets every heating unit for real-world output, not datasheet optimism. This single-stage furnace pairs with your existing ductwork in upflow, downflow, or horizontal configurations, using an 18-speed ECM blower that draws less power than standard PSC motors. That means smaller inverter requirements if you are building a grid-independent system. Metal venting required.

Whisper-Quiet Blower for Sustained Cabin Comfort

Whisper-Quiet Blower for Sustained Cabin Comfort

The multi 18-speed constant torque ECM motor runs at 1050 RPM with a 0.5 HP direct drive, delivering airflow tailored to your duct system without the ramp-up noise of standard blowers. ACiQ added thicker sheet metal construction and extra cabinet insulation to keep operation near-silent — a detail that matters in an open-layout cabin or homestead where mechanical noise carries. The ECM design also means tighter temperature control across all 18 speeds compared to single-speed PSC alternatives. At 115v single-phase and a 15-amp max breaker, this furnace integrates cleanly into most residential electrical panels.

Flexible Installation for Remote and Retrofit Builds

Flexible Installation for Remote and Retrofit Builds

Multi-positional design — upflow, downflow, or horizontal — means this furnace adapts to your build, not the other way around. Cabinet widths of 17.5 inches or 21 inches accommodate different mechanical closet and utility room layouts common in rural properties and older homes. The unit ships configured for natural gas with a 1/2 inch NPT connection and 13.6 inch WC maximum inlet pressure. Propane conversion is possible with an optional field kit for properties off the natural gas line. At 137 pounds, the unit is manageable for a two-person installation. Note: this model is not Low NOx or Ultra Low NOx compliant and may require a mitigation fee in California.

Installation Compatibility

Confirm these conditions before ordering to ensure a straightforward install.

  • Home heating load does not exceed 70,400 BTUs of usable output
  • Metal exhaust flue system available (PVC venting not compatible with 80% AFUE)
  • 115V single-phase 15A dedicated circuit accessible at install location

Where This Furnace Fits

Designed for installations where dependable gas heat matters more than peak efficiency ratings.

Remote Cabins
Homesteads & Rural Homes
Workshops & Outbuildings

Full specifications

At a glance

Dimensions
17.5", 21"
Power
.5 HP
Compliance
Not compliant with Low NOx or Ultra Low NOx standards
Full specifications19 data points across 4 categories

Dimensions

Cabinet Width17.5", 21"
Cabinet HeightSee product page
Cabinet DepthSee product page
Weight137.00 lbs

Power & Performance

Heating BTU88,000
Usable Heat Output70,400 BTUs
Furnace Efficiency / AFUE80%
Blower MotorMulti 18-Speed Constant Torque (MCT) ECM Motor
Drive TypeDirect
Motor RPM1050
Horsepower.5 HP
ConfigurationUpflow/Downflow/Horizontal
Electrical115v 1 Phase 60 Hz
PhaseSingle Phase
Max Breaker Size15 Amps

Materials

Exhaust Flue RequirementMetal
Cabinet ConstructionThicker sheet metal with additional insulation

Compliance & Warranty

NOx ComplianceNot compliant with Low NOx or Ultra Low NOx standards
California NoteSubject to mitigation fee in California

The Off Grid Vault Promise

Every product we carry is vetted for real-world performance. If it doesn't meet our standards, it doesn't make the cut.

Free ShippingShips free on all orders — no minimums, no surprise freight charges.
30-Day Performance GuaranteeIf it doesn't perform as specified, return it uninstalled in original packaging within 30 days for a full refund.
Authorized Dealer SupportWarranty claims handled directly through us — not through a faceless ticket queue.

88,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace

The ACiQ 88,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace is a budget-friendly furnace designed to offer dependable heating performance and year-round comfort. Although it operates at a basic efficiency level, it delivers adequate warmth even in the coldest weather conditions when matched properly to your home’s heating needs. With an input capacity of 88,000 BTUs and an 80% AFUE (Annual Fuel Utilization Efficiency), the furnace provides 70,400 BTUs of usable heat. This means 80% of the fuel consumed is converted into heat for your home, while the remaining 20% is lost through flue gases and normal furnace operations. Due to its efficiency rating, this furnace requires metal venting. For homes needing PVC/plastic venting, a furnace with 90% or higher efficiency would be required. The unit comes ready for natural gas operation but can be field-converted to propane with an optional LP conversion kit. Note that this model is not compliant with Low NOx or Ultra Low NOx standards and may be subject to a mitigation fee in California.

Every ACiQ furnace is built with comfort, reliability, and quiet performance in mind. The 88,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace features a whisper-quiet ECM blower fan, thicker sheet metal construction, and additional cabinet insulation for near-silent operation. ACiQ prioritizes long-term value, providing cost savings not only upfront but also through lower energy bills over time. All models include multi-speed or variable-speed ECM blowers, and optional upgrades such as high-efficiency secondary heat exchangers, two-stage heating, modulating burners, and variable-speed blowers can further enhance comfort and efficiency.

With a multi-positional design, the ACiQ 88,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace can be installed in upflow, downflow, or horizontal configurations, making it highly versatile for various installation needs. Its durable outer casing and aluminized steel heat exchanger ensure reliable operation and longevity. Backed by ACiQ’s extended warranty programs—ranging from 10-year to lifetime heat exchanger coverage with online registration—this furnace provides peace of mind for years to come. However, it is not approved for use in mobile homes without additional modifications.

This gas appliance must be installed by a trained and qualified technician. Incorrect installation of gas lines, flue connections, or venting can lead to serious injury or even death. By purchasing this unit, you confirm that a trained professional will be responsible for the installation. We are not liable for any personal injury or property damage resulting from improper installation or service. The individual performing the installation or maintenance assumes full responsibility for any associated risks. Please note that many local jurisdictions require a licensed professional to install this type of equipment.



88,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace

ACiQ 88,000 BTU 80% Gas Furnace Specs

  • Weight: 137.00 lbs
  • Exhaust Flue Requirement: Metal
  • Furnace Efficiency / AFUE: 80%
  • Heating BTU: 88,000
  • Blower Motor: Multi 18-Speed Constant Torque (MCT) ECM Motor
  • Drive Type: Direct
  • Motor RPM: 1050
  • Horsepower: .5 HP
  • Configuration: Upflow/Downflow/Horizontal
  • Electrical: 115v 1 Phase 60 Hz
  • Phase: Single Phase
  • Max Breaker Size: 15 Amps
  • Connection: 1/2″ NPT
  • Maximum Inlet Pressure: 13.6″wc
  • Burner Stages: Single
  • Ignition Type: Direct Ignition with Silicon Nitride Hot Surface Ignitor
  • Fuel Type: Propane, Natural Gas
  • Certification: AHRI Certified
  • Dimensions: 33 1/3″ H x | 17 1/2″W | 21″ H x 29″ D



ACiQ 88,000 BTU 80% Gas Furnace Specs

  • 88,000 BTU input with 80% AFUE efficiency (70,400 BTU output)
  • Affordable and reliable heating solution for small to medium homes
  • Single-stage burner with quiet ECM multi-speed blower
  • Multi-positional design: upflow, downflow, or horizontal installation
  • Requires metal venting (PVC/plastic venting not supported)
  • Field-convertible to propane with optional LP conversion kit
  • Not Low NOx or Ultra Low NOx compliant (CA mitigation fee may apply)
  • Whisper-quiet operation with enhanced cabinet insulation and thicker sheet metal
  • Energy-saving ECM blower; optional upgrades include two-stage heating, modulating burners, and secondary heat exchangers
  • Aluminized steel heat exchanger for enhanced durability



Your Satisfaction with ACiQ is Guaranteed:

  • 20 Year Heat Exchanger and 10 Year Parts with Online Registration
  • Lowest Price Guarantee

Additional information

Cabinet Width

17.5", 21"

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About aciq Furnaces

aciq is a trusted manufacturer of premium furnaces. OffGridVault is an authorized dealer offering the full aciq lineup with free delivery, price match guarantee, and expert support.

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