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ACiQ 88,000 BTU Gas Furnace — Multi-Positional Single Stage Heating

Reliable 88,000 BTU Heating for Off-Grid and Grid-Independent Homes

88,000 BTU input — Delivers 70,400 BTU of usable heat
Multi-positional install — Upflow, downflow, or horizontal configuration
Quiet ECM blower — 18-speed constant torque motor operation
Propane convertible — Field-convert from natural gas with LP kit
  • FREE System Design Consultation -- Our engineers size your system for your actual consumption
  • FREE Shipping -- LTL freight with threshold delivery, no surprise charges

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

Reliable 88,000 BTU Heating for Off-Grid and Grid-Independent Homes

The ACiQ 88,000 BTU gas furnace delivers 70,400 BTU of usable heat through an 80% AFUE single-stage design. This field-tested unit runs on natural gas out of the box and can be converted to propane with an optional LP kit. Built-to-survive with thicker sheet metal construction, additional cabinet insulation, and a whisper-quiet 18-speed ECM blower motor, it operates at near-silent levels. Multi-positional configuration supports upflow, downflow, or horizontal installation. Metal venting is required. Not Low NOx or Ultra Low NOx compliant.

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88,000 BTU Input
18-Speed ECM Blower
Multi-Positional Install
NG or Propane Ready
88,000
BTU Heating Input
80%
AFUE Efficiency
70,400
BTU Usable Heat Output
Heat That Doesn't Quit When the Grid Does

Heat That Doesn't Quit When the Grid Does

When the grid drops and electric heating goes dark, you need a gas-fired system that keeps your home warm without utility power. The ACiQ 88,000 BTU furnace runs on natural gas or propane, giving you heating independence that electric systems cannot match. At Off Grid Vault, we only carry equipment we would install on our own properties, and this furnace earns its place. It delivers 70,400 BTU of usable heat through a single-stage burner paired with an 18-speed ECM blower for consistent, quiet operation. Multi-positional installation means it fits upflow, downflow, or horizontal configurations, making it a practical choice for cabins, workshops, and off-grid homes where flexibility matters.

Built-to-Survive Construction for Long-Term Reliability

Built-to-Survive Construction for Long-Term Reliability

This furnace is built-to-survive with thicker sheet metal construction and additional cabinet insulation that keeps operation near-silent. The direct-drive ECM blower motor rated at 0.5 HP and 1,050 RPM runs on 115V single-phase power with a 15-amp max breaker, keeping electrical demands modest enough for generator or inverter backup systems. A metal exhaust flue handles the 80% AFUE venting requirement, and the 1/2-inch NPT gas connection with 13.6-inch WC maximum inlet pressure keeps fuel delivery straightforward. Every specification on this unit has been verified by our team before it earned a listing on Off Grid Vault.

Flexible Fuel Setup for Self-Reliant Homes

Flexible Fuel Setup for Self-Reliant Homes

The ACiQ 88,000 BTU furnace ships configured for natural gas operation and can be field-converted to propane using an optional LP conversion kit, giving you fuel flexibility based on what is available at your location. For homesteads and rural properties running on propane tanks, this adaptability removes a common compatibility barrier. The single-stage burner keeps operation simple with fewer failure points than modulating designs. At 137 pounds with a cabinet width of 17.5 or 21 inches, this unit fits into tighter mechanical rooms without sacrificing heating output. Note: this furnace is not compliant with Low NOx or Ultra Low NOx standards and may require a mitigation fee in California.

Compatibility Check

Verify your setup before ordering to ensure a clean installation.

  • Home heating load requires 70,400 BTU or less of usable output
  • Metal exhaust flue is available — PVC/plastic venting is not supported at 80% AFUE
  • 115v single-phase 60 Hz electrical supply with a 15-amp breaker

Where This Furnace Fits

Designed for straightforward heating in homes and outbuildings where simplicity and dependability matter.

Remote Cabin Heating
Homestead Winter Backup
Off-Grid Solar Hybrid Setup
Workshop or Outbuilding Heat

Full specifications

At a glance

Dimensions
17.5", 21"
Power
.5 HP
Compliance
Not compliant
Full specifications17 data points across 4 categories

Dimensions

Cabinet Width17.5", 21"
Weight137.00 lbs

Power & Performance

Heating BTU88,000
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

ConstructionSee product page
Cabinet InsulationSee product page

Compliance & Warranty

Exhaust Flue RequirementMetal
Low NOx ComplianceNot compliant
Ultra Low NOx ComplianceNot compliant

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 to your door — LTL freight included on large items, no surprise charges.
30-Day Performance GuaranteeIf it doesn't perform as specified, we make it right. Uninstalled returns accepted within 30 days in original packaging.
Free System Design ConsultationOur engineers size your system for your actual consumption — no guesswork, no incompatible components.

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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