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ACiQ 66,000 BTU Gas Furnace — 80% AFUE, Multi-Positional Install

66,000 BTU of Reliable Heat for Off-Grid and Remote Homes

52,800 BTUs delivered — Usable heat output from 66,000 BTU input at 80% AFUE
Three install positions — Upflow, downflow, or horizontal to match your layout
18-speed ECM motor — Constant torque blower for consistent airflow control
Dual fuel capable — Natural gas standard; propane conversion kit available
AHRI Certified build — Verified performance meets industry standards
  • FREE System Design Consultation -- Our team sizes your heating load for your actual space
  • FREE Shipping -- Ships free, including LTL freight on large items

Price range: $852.95 through $969.95

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ACiQ 66,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace
ACiQ 66,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace
$852.95 – $969.95Price range: $852.95 through $969.95

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In the box

  • ACiQ 66,000 BTU gas furnace
  • Installation and user manual
ACiQ 66,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace
ACiQ 66,000 BTU Gas Furnace — 80% AFUE, Multi-Positional Install
$852.95 – $969.95Price range: $852.95 through $969.95

66,000 BTU of Reliable Heat for Off-Grid and Remote Homes

The ACiQ 66,000 BTU gas furnace delivers 52,800 BTUs of usable heat through a single-stage burner and an 18-speed ECM blower motor. Its multi-positional design—upflow, downflow, or horizontal—makes it adaptable to off-grid cabins, homesteads, and remote builds where installation flexibility matters. Built-to-survive with a durable outer casing, this field-tested unit runs on natural gas and converts to propane with an optional LP kit. Metal venting is required for the 80% AFUE rating. At 114 lbs with a 15-amp max breaker draw, it integrates cleanly into grid-independent heating setups without overloading your electrical panel.

FREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORT
Multi-Positional Install
52,800 BTU Output
18-Speed ECM Motor
NG or LP Compatible
66,000
BTU Input Capacity
80%
AFUE Efficiency Rating
114
Unit Weight (lbs)
Heating that does not depend on the grid

Heating that does not depend on the grid

When the grid goes down and temperatures drop, grid-tied electric heat stops working. The ACiQ 66,000 BTU furnace runs on natural gas or propane — fuel you can store on-site, making your heating truly grid-independent. At Off Grid Vault, we vet every unit for real-world reliability before listing it. This furnace is something we would specify for a cabin or homestead that needs dependable heat without utility dependence. The 18-speed ECM blower maintains consistent airflow across multiple configurations, and the single-stage burner keeps operation straightforward and serviceable in the field.

Adapts to your build, not the other way around

Adapts to your build, not the other way around

The multi-positional design means this furnace installs in upflow, downflow, or horizontal orientations. For an off-grid cabin with a crawl space, a homestead with basement mechanicals, or a shop with limited ceiling available, you are not forced to restructure your build around the equipment. Cabinet widths of 14", 17.5", and 21" accommodate different framing and available requirements. The direct silicon nitride hot surface ignitor eliminates pilot light issues common in older units, and the single-stage operation keeps the control board simple — fewer failure points, easier troubleshooting, faster repairs when you are miles from the nearest HVAC technician.

Straightforward specs you can verify

Straightforward specs you can verify

66,000 BTU input. 52,800 BTU output. 80% AFUE. Metal flue venting required. 15-amp max breaker. 0.33 HP motor at 1,050 RPM. These are not marketing claims — they are AHRI-certified specifications you can cross-reference against your heating load calculation. The 80% AFUE rating means 80 cents of every fuel dollar becomes heat for your space. If you have sized your home for roughly 50,000 BTUs of heating demand, this unit matches that load without paying for capacity you will never use. At Off Grid Vault, we present real numbers because informed buyers make better decisions — and better decisions last longer in the field.

Installation Compatibility

Verify your mechanical room and venting setup before ordering.

  • Cabinet space accommodates 14", 17.5", or 21" width configuration
  • Metal flue venting is installed (PVC/plastic not compatible with 80% AFUE)
  • Dedicated 15-amp electrical circuit is available for unit connection

Where This Furnace Fits

Designed for flexible installation across a range of residential and off-grid heating scenarios.

Off-Grid Cabin Heating
Remote Homestead Warmth
Retrofit Replacement Install

Full specifications

At a glance

Dimensions
14", 17.5", 21"
Power
.33 HP
Compliance
Not compliant
Warranty
See product page
Full specifications18 data points across 4 categories

Dimensions

Cabinet Width14", 17.5", 21"
Weight114.00 lbs

Power & Performance

Heating BTU66,000
Usable Heat Output52,800 BTUs
Furnace Efficiency / AFUE80%
Burner StagesSingle
Blower MotorMulti 18-Speed Constant Torque (MCT) ECM Motor
Motor RPM1050
Horsepower.33 HP
Max Breaker Size15 Amps
Maximum Inlet Pressure13.6"wc
Connection1/2" NPT
ConfigurationUpflow/Downflow/Horizontal
Exhaust Flue RequirementMetal

Materials

CasingSee product page

Compliance & Warranty

Low NOx ComplianceNot compliant
California ShippingAdditional mitigation fee may apply
WarrantySee product page

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, including LTL freight delivery. No minimums, 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.
Authorized Dealer SupportWarranty claims go through us, not through a ticket queue. Real people, real accountability after the offer.
★★★★★
“Replaced the old unit in my 1,200 sq ft cabin with this ACiQ furnace. Went with propane since we are fully off-grid and have a 500-gallon tank. Install was straightforward — horizontal configuration fit right into my existing mechanical closet. The ECM blower is noticeably quieter than my previous PSC motor unit. At $852, this was a practical choice for a cabin that does not need 95% efficiency to stay warm through a Montana winter.”
F
First L.Bozeman, MT

66,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace

The ACiQ 66,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace is an affordable furnace designed to deliver reliable heating performance and reasonable comfort throughout your home. Although it operates at a basic efficiency, it still provides sufficient warmth, even during the coldest parts of the year.

With an input capacity of 66,000 BTUs and an efficiency rating of 80% AFUE, this furnace outputs 52,800 BTUs of usable heat. The 80% AFUE means that 80% of the fuel consumed is converted into heat for your home, while the remaining 20% is lost through flue piping and normal operational waste. Because of this efficiency level, metal venting is required; if plastic/PVC venting is preferred, a 90%+ efficiency model would be necessary. The unit runs on natural gas out of the box but can be converted to propane with an optional LP conversion kit. However, this model is not Low NOx or Ultra Low NOx compliant, and if shipped to California, it may incur an additional mitigation fee.

Versatility is a key feature of the ACiQ 66,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace, as it can be installed in upflow, downflow, or horizontal configurations. This makes it adaptable to a variety of home layouts. Its durable outer casing is designed to resist wear and tear over time, providing long-lasting performance and consistent indoor comfort. Please note, this unit is not approved for use in mobile homes unless additional modifications are made.

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.


44,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace

ACiQ 66,000 BTU 80% Gas Furnace Specs

  • Weight: 114.00 lbs
  • Exhaust Flue Requirement: Metal
  • Furnace Efficiency / AFUE: 80%
  • Heating BTU: 66,000
  • Blower Motor: Multi 18-Speed Constant Torque (MCT) ECM Motor
  • Motor RPM: 1050
  • Horsepower: .33 HP
  • Configuration: Upflow/Downflow/Horizontal
  • 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 14 3/16″| 17 1/2″ | 21″ W x 29″ D


ACiQ 66,000 BTU 80% Gas Furnace Specs

  • 66,000 BTU input with 80% AFUE efficiency (52,800 BTU output)
  • Cost-effective heating solution for small to medium homes
  • Single-stage burner with multi-speed blower for consistent comfort
  • Multi-positional installation: upflow, downflow, or horizontal
  • Onboard self-diagnostics for easier troubleshooting
  • Durable outer casing for long-term performance
  • Compatible with natural gas; field-convertible to propane with optional LP kit
  • Requires metal flue venting (not compatible with PVC/plastic venting)
  • Not compliant with Low NOx or Ultra Low NOx regulations (CA mitigation fee may apply)
  • Not approved for mobile home use without modifications


Your Satisfaction with ACiQ is Guaranteed:

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

Additional information

Cabinet Width

14", 17.5", 21"

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Frequently Asked Questions

A 90%+ furnace costs significantly more upfront and requires PVC venting, which adds installation complexity and material cost. This 80% AFUE unit at $852 delivers 52,800 BTUs using standard metal flue piping — simpler install, fewer components. If your heating load is under 50,000 BTUs and you are heating a cabin or workshop rather than a large primary residence, the payback period on a high-efficiency model can exceed 8–10 years. For off-grid setups where simplicity and serviceability matter more than marginal efficiency gains, this unit respects your investment.
Off Grid Vault is an authorized dealer for the brands we carry. When you purchase from us, warranty claims go through us — not through a third-party ticket queue. ACiQ furnaces come with manufacturer warranty coverage, and because we vet every product before listing, you are buying a unit that meets our performance standards. If something does not perform as specified within the first 30 days, our performance guarantee covers uninstalled returns in original packaging.
This furnace runs on natural gas or propane — both fuels you can store on-site independently of the grid. The electrical draw is modest at 15 amps max with a 0.33 HP ECM motor, meaning it can run on a small inverter or generator during outages. For system design help, our free consultation service will size the furnace against your square footage, insulation level, and climate zone. Contact us with your heating load calculation and we will confirm fit before you purchase.
Single-stage furnaces with fewer electronic components tend to have longer service lives than multi-stage or modulating units. The silicon nitride hot surface ignitor is durable and eliminates the pilot light failure mode found in older designs. The 18-speed ECM motor has no belts or brushes to wear. With annual maintenance — cleaning the heat exchanger, checking flue connections, and replacing the air filter — this furnace is built-to-survive 15–20 years in residential or cabin service. Actual lifespan depends on installation quality and maintenance consistency.
This unit delivers 52,800 BTUs of usable heat. As a rough reference, that covers well-insulated homes up to approximately 1,100–1,400 sq ft in moderate climates, or smaller spaces in colder regions. The accurate method is a Manual J heating load calculation based on your insulation, window area, ceiling height, and climate zone. If your cabin or homestead needs 45,000–55,000 BTUs, this furnace matches that range without oversizing — which matters because an oversized single-stage unit short-cycles and reduces comfort.
The 80% AFUE rating means 20% of combustion heat exits through the flue. That exhaust temperature is too high for PVC plastic piping, which is why metal venting is required. PVC venting is only safe on 90%+ condensing furnaces where exhaust temperatures are low enough for plastic. Metal flue pipe is widely available, durable, and straightforward to install. If your current setup already uses metal venting from a previous furnace, this unit drops in without reworking the exhaust system.
A qualified HVAC technician can typically install a multi-positional furnace like this in 4–6 hours, assuming existing ductwork and gas lines are in place. The multi-positional design reduces layout constraints, which can cut install time compared to units that only fit one orientation. Metal flue venting is straightforward for experienced installers. If you need help finding a qualified installer in your area, reach out — we work with buyers across the country and can often point you toward experienced off-grid HVAC contractors.
SKU: N80MSN0701412A Category: Brand:

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 Shipping Ships free on all orders, including LTL freight delivery. No minimums, no surprise charges.
30-Day Performance Guarantee If it doesn't perform as specified, we make it right. Uninstalled returns accepted within 30 days in original packaging.
Authorized Dealer Support Warranty claims go through us, not through a ticket queue. Real people, real accountability after the offer.

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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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