Whole-home HVAC / Signature · Indoor air handler

Signature · Indoor air handler

MCAEAMPEF36C21AA$1,293.89
Signature · Indoor air handlerR-454B
  • MRCOOL Signature multi-position indoor air handler cabinet
  • MRCOOL vertical ducted indoor air handler
  • MRCOOL vertical ducted indoor air handler
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MRCOOL DIY DIRECT SIGNATURE

Signature · Indoor air handler

Choose the exact component. Commission a professionally matched system.

MCAEAMPEF36C21AA

Nominal class: 3 tonsR-454BComponent only
$1,293.89
$1,293.89 $1,798.00
You Save: $504.11

Selected equipment configuration · MCAEAMPEF36C21AA

Air handler only · Equipment only. Installation accessories are not added.

Equipment configurationDefault Title
Quantity total$1,293.89

Checking this configuration…

Existing financing options ↗ · Delivery details ↗

CONFIDENT PROJECT PLANNING

Understand the equipment.
Know what your project needs.

THE EQUIPMENT

The exact equipment component

This listing is the indoor air handler only. It is not an indoor/outdoor equipment bundle. Nominal capacity: 3 tons.

PLAN SEPARATELY

A complete installation is more than equipment.

Duct sizing and static pressure, transitions, mounting, drainage, controls, electrical circuits, clearances, permits and qualified installation need project-specific planning. No curb, heat kit, thermostat or accessory is added silently.

Professional/traditional installation only. No pre-charged DIY pathway, unverified companion equipment, heat kit or conversion kit is selected. A system match requires exact manufacturer/AHRI evidence; no pairing is inferred from tonnage.

Calculate heating and cooling needs ↗

PLAN YOUR WHOLE-HOME COMFORT

Which MRCOOL whole-home system is right for you?

01 / CENTRAL DUCTED SPLIT

Separate indoor + outdoor equipment

A matched air handler and outdoor heat pump connect with refrigerant piping. Plan indoor space, duct airflow and the exact connection method.

Buying difference: verify the actual equipment package and line-set configuration. HyperHeat, VersaPro, Universal and Signature have distinct purchasing rules; Signature stays professional/traditional.

Explore central ducted systems ↗
02 / PACKAGED HEAT PUMP

All-electric comfort in one cabinet

Heating and cooling equipment is assembled outdoors and connected to your ducts. Verify discharge direction, design-temperature heating output and electrical service.

Buying difference: no split-system line set. Optional auxiliary heat needs an exact compatible kit and circuit plan; it is not assumed included.

Explore packaged equipment ↗
03 / GAS + ELECTRIC PACKAGED

Gas heating. Electric cooling.

One outdoor cabinet combines a gas furnace and air conditioning. Your qualified installer must verify fuel supply, combustion, exhaust and duct configuration.

Buying difference: gas input is not delivered heat output. Do not assume conversion-kit availability or homeowner installation.

Explore gas/electric equipment ↗

REPLACEMENT SEASON, PLANNED WELL

Comfort starts with the installation plan.

For cold-weather replacement, compare exact heating output at your local design conditions—not nominal tonnage alone. Existing ducts, available fuel, electrical capacity and professional installation all matter. Have a qualified installer verify the exact model’s heating performance, available service and site requirements.

MODEL-SPECIFIC PLANNING

Know the equipment before you order.

Equipment capacity
Nominal capacity: 3 tons
Efficiency
No independent SEER2/HSPF2 rating for this standalone air handler. Rating requires an exact verified indoor/outdoor combination.
Electrical supply
Supply: 208/230 V · Phase: 1 · Frequency: 60 Hz · MCA: 4.5 A · Maximum fuse/breaker: 6 A.
Cabinet dimensions
Width: 19.625 in · Height: 45.75 in · Depth: 22 in
Installation configuration
Indoor: upflow, downflow or horizontal left/right, subject to the exact coil, sensor and drain configuration. Professional/traditional installation only. No pre-charged DIY pathway, unverified companion equipment, heat kit or conversion kit is selected. A system match requires exact manufacturer/AHRI evidence; no pairing is inferred from tonnage.
Included vs. project requirements
This listing is the indoor air handler only. It is not an indoor/outdoor equipment bundle.
Accessories & compatibility
No accessory compatibility inferred. Reference information only. No compatible purchase is inferred or automatically added.

Rated capacity is measured at specified test conditions. Design-temperature output, duct static pressure and installed clearances require an exact installation review. Equipment MCA/MOP is not a replacement for heat-kit circuit tables.

EXACT-MODEL INFORMATION

The details, when you need them.

5 resources

Manufacturer specifications ↗

Specifications for MCAEAMPEF36C21AA, rated capacities and applicable revision.

Installation & controls ↗

Qualified installation, ductwork, circuits and exact model requirements.

Warranty document ↗

Read applicable conditions and exclusions. No additional labor promise.

Existing Knowledge Center ↗

Find model-specific manuals, specifications and warranty documents.

Plan with our team ↗

Verify equipment, controls, accessories and delivery requirements before ordering.

GOOD QUESTIONS. CLEAR ANSWERS.

Before you decide.

What is included with MCAEAMPEF36C21AA?

This listing is the indoor air handler only. It is not an indoor/outdoor equipment bundle.. This listing is for the identified equipment component; a compatible complete system may require separately purchased equipment and installation materials.

What installation connections does this equipment need?

Professional/traditional installation only. No pre-charged DIY pathway, unverified companion equipment, heat kit or conversion kit is selected. A system match requires exact manufacturer/AHRI evidence; no pairing is inferred from tonnage.

Follow the exact model instructions, permits and local codes. Installation method, refrigerant connection type and included equipment are separate decisions.

Is this the right size for my house?

Floor area alone does not establish design load. Use our existing Manual J planning tool and have the exact equipment selection checked against your home, ducts, climate and installation requirements.

What does the warranty cover?

Use the exact model-family limited warranty linked above. Purchase date, application, installation and other conditions matter. This page makes no automatic labor-coverage promise and does not replace the manufacturer’s terms.

Will the page add accessories to my cart?

No. Add to Cart adds only MCAEAMPEF36C21AA and your selected quantity. Line sets, controls and other installation materials are separate purchases. Check the exact matched equipment and connection requirements before choosing accessories.