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80% AFUE 4 Ton 90,000 BTU Downflow Multi-Speed Gas Furnace
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80% AFUE 4 Ton 90,000 BTU Downflow Multi-Speed Gas Furnace

SKU MGD80SE090B4A

88 BTUup to 450 sq ft120
$1,504.00
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Request a quote and we'll check when it's back, or match you to the closest in-stock unit.

We'll reply by email with availability or an in-stock alternative, and you can message us about it any time.

Registered 10 Year Parts Warranty warranty · Covers up to 450 sq ft
Ships nationwide · exact freight at checkout
30-day returns on unopened products · See policy
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Sizing Help

Not sure if 0K BTU is right for your space?

Proper sizing prevents short-cycling, high bills, and premature failure. Our sizing tool takes 60 seconds.

Match My SpaceOr call (657) 582-0899

Resources

Brochures & Manuals

BrochurePerformance SpecsInstall ManualOwner ManualWarrantyEnergy GuideAHRI Certificates

Description

80% AFUE 4 Ton 90,000 BTU Downflow Multi-Speed Gas Furnace

What's in the Box

Here's what you'll receive with your order

80% AFUE 4 Ton 90,000 BTU Downflow Multi-Speed Gas Furnace

As described

2 Years compressor warranty
Compressor: 2 Years warrantyParts: 1 Year warranty

Key Specifications

120V

Voltage

88,000BTU

Heating Capacity

80% AFUE 4 Ton 90,000 BTU Downflow Multi-Speed Gas Furnace — Model Details

What this specific model is sized for, how it installs, how it performs, and what it costs to run.

Room & Space Coverage — 88 BTU

The 80% AFUE 4 Ton 90,000 BTU Downflow Multi-Speed Gas Furnace delivers 88 BTU of cooling and heating capacity (4-ton class), sized for spaces up to 450 sq ft in standard 8-ft ceiling rooms with average insulation. At this capacity the unit targets small rooms, nurseries, tiny homes, enclosed porches, and dedicated zones that need precise temperature control without oversizing — oversized units short-cycle, which hurts humidity control and shortens compressor life.

Efficiency & Operating Cost

On the gas side the unit achieves 80% AFUE, meaning 80¢ of every fuel dollar becomes usable heat — the rest exits through the flue.

Power & Electrical Requirements

Power requirement: 120V 1-phase 60Hz (standard US 120V household outlet). Minimum circuit ampacity is 8.4A with a maximum overcurrent protection of 15A. Wire the outdoor unit with 14 AWG copper on a dedicated 15A double-pole breaker (or single-pole at 120V), with a disconnect within sight of the condenser per NEC 440.14.

Install Difficulty — Professional Install

This is a professionally-installed condenser that requires a licensed HVAC technician with EPA 608 certification. The tech will pull a vacuum on the line set to 500 microns, pressure-test with nitrogen, release the factory charge, and commission per MrCool's startup procedure. Budget 1 full day for install on a single-zone system.

What's in the Box & Compatibility

Ships as a Gas Furnace.

Product Details

When harsh winter weather strikes, nothing compares to the warmth and safety a powerful reliable gas furnace can provide. While furnace heating technology has been around for decades, not all systems are created equally. Some are definitely better than others. One of the best on the market is the MRCOOL single stage, 80% AFUE gas furnace. This system can be installed down flow, and is designed to operate for decades, provide powerful heating capability, and, best of all, keep your heating bill affordable at the same time. It does the latter via its 80% AFUE energy efficiency rating. That mark of quality ensures 80% of every dollar you spend on heating fuel gets turned into real, effective heat for your home.

Specifications

Heating Capacity88 BTU
Voltage120 V
Tonnage4 Ton
Airflow1570 CFM
Phase1
Country of OriginMexico

Features

  • Easily removable slide out blower design
  • Registered 10-year parts warranty
  • Rotatable draft inducer for venting flexibility
  • Downflow furnace
  • Heating efficiency of 80% AFUE
  • AHRI Certified
  • LP kit not included
  • Aluminized steel tapered crimped non-welded clam shell heat exchanger design
  • Compact 33" height
  • Left or right utility connections

Frequently Asked Questions

Everything you need to know about this product

What size room will the 80% AFUE 4 Ton 90,000 BTU Downflow Multi-Speed Gas Furnace cool?

At 88 BTU this unit is sized for rooms up to 450 sq ft under standard 8-ft ceilings with average insulation. Add 10–20% for sun-exposed rooms, poorly insulated spaces, or ceilings above 9 ft.

Do I need a licensed HVAC installer?

Yes — this unit is professionally-installed. The installer needs EPA 608 certification to handle the refrigerant, plus standard HVAC tools (vacuum pump, manifold gauges, nitrogen kit). Expect a one-day install on a single-zone system, more on multi-zone.

What electrical circuit do I need for installation?

120V dedicated circuit with the disconnect within sight of the outdoor unit per NEC 440.14. An electrician will size the breaker based on the minimum circuit ampacity shown on the nameplate. Budget $400–$900 for a new dedicated 240V circuit if one isn't already present.

How fast does HVACZAR ship this unit?

Shipping is calculated at checkout from the order weight, and you see the exact charge before paying. In-stock SKUs leave the warehouse within 1–3 business days. Transit time is 3–7 business days via truck freight (with liftgate delivery) for outdoor units and UPS Ground for accessories. Tracking is emailed at pickup.

What if it arrives damaged or I change my mind?

Inspect the unit before signing for freight delivery. If there is visible damage, note it on the delivery receipt and refuse the shipment — we ship a replacement at no cost. Unopened and unused units can be returned within 30 days for a refund less outbound shipping.

What is the warranty on the 80% AFUE 4 Ton 90,000 BTU Downflow Multi-Speed Gas Furnace?

The 80% AFUE 4 Ton 90,000 BTU Downflow Multi-Speed Gas Furnace comes with a Registered 10 Year Parts Warranty manufacturer warranty when purchased from HVACZAR, an authorized MrCool dealer. Register your unit after purchase to activate full warranty coverage.

How long does shipping take?

Shipping is calculated at checkout from the order weight. Most MrCool systems ship within 1-3 business days and arrive in 3-7 business days via FedEx, UPS, or truck freight with liftgate delivery.

What size room does 88 BTU cover?

A 88 BTU unit is sized for rooms up to 450 sq ft. Proper sizing depends on ceiling height, insulation, climate zone, and window exposure. Use our system finder for a precise recommendation.

Do you offer returns?

Yes. HVACZAR offers a 30-day return policy on unopened, unused products in original packaging. Contact us to initiate a return and receive a return authorization number.

How can I pay?

We accept all major credit cards (Visa, Mastercard, American Express, Discover) via Stripe secure checkout. All transactions are encrypted and protected.

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Ships Nationwide — Shop by State

We deliver the 80% AFUE 4 Ton 90,000 BTU Downflow Multi-Speed Gas Furnace to all 50 states via FedEx, UPS, and truck freight. Each state page lists local rebate programs and utility incentives.

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