MRCOOL Mrcool Signature Series Air Conditioner Condenser MCAESAS4T3621AA — front hero view
MRCOOL Mrcool Signature Series Air Conditioner Condenser MCAESAS4T3621AA — side detail view
MRCOOL Mrcool Signature Series Air Conditioner Condenser MCAESAS4T3621AA — install/detail view
Roll over image to zoom in Click on image to zoom
Download Brochure
MRCOOL Mrcool Signature Series Air Conditioner Condenser MCAESAS4T3621AA — front hero viewMRCOOL Mrcool Signature Series Air Conditioner Condenser MCAESAS4T3621AA — side detail viewMRCOOL Mrcool Signature Series Air Conditioner Condenser MCAESAS4T3621AA — install/detail view

Mrcool Signature Series Air Conditioner Condenser MCAESAS4T3621AA

★★★★★
Iron Line Verified
Authorized Dealer: MRCOOL
Official Partner
IN STOCK & READY TO SHIP
SKU: MCAESAS4T3621AA
Price:
$1,862.82
Estimated delivery: 2–13 business days Order before 2:00 PM ET. Handling takes 1–3 business days and transit 1–10 business days. Tracking is emailed when it ships.
Pay over time with Shop Pay Choose Shop Pay at checkout. Subject to approval.
  • Authorized MRCOOL dealer
  • A+ customer service
  • Multiple financing options
  • We pay sales tax (IL excluded)

Talk to a MrCool expert: (888) 308-5580 Mon–Sun, 7:00 AM–7:00 PM Central

×

We pay your sales tax! (IL excluded) 📦 

  • SEER2: Up to 14.3
  • Tonnage: 3
  • Cooling Capacity: 33000 BTU
  • Warranty: 10 Year Parts, Limited Lifetime Compressor Warranty

Estimated Delivery Timeline

Order Placed

Ships Out

Delivered

*Please Note: This timeline is an estimate. Certain products may require an additional 1 week for manufacturing. Please speak with your sales rep, Matthew, for official details and confirmation before placing your order.

CALL US FOR THE MOST ACCURATE AND COMPETITIVE LTL SHIPPING RATE, (888) 308-5580

Get Questions Answered Fast

Experience: 20+ Years B2B • Origin: US-Based Support
EXPRESS SHIPPING

EXPRESS SHIPPING

Most orders process in 1-3 days. Yes, even if it weights 400lb

Hassle-Free Returns

Hassle-Free Returns

No restocking fees. Ever.

Manufacturer Warranty

Manufacturer Warranty

Fully backed by the brands you trust.

Dedicated Rep Mathew

Dedicated Rep Mathew

Speak to a US-Based Equipment Specialist: (888) 308-5580

Flexible Financing

Flexible Financing

Get Upto 60 Months Financing

Key Information

  • Order Cutoff Time: 2:00 PM EST
  • Order Handling Time: 1–3 business days (Monday–Friday)
  • Transit Time: 1–7 business days (Monday–Friday)
  • Total Estimated Delivery Time: 3–11 business days (Monday–Friday)
  • Shipping Availability: Free Shipping On some Items In The Contiguous United States only

    For more information Click Here
×

Engineering Toolsuite

Industrial calculations for facility planning and financial justification.

1. Facility & Utility Sizing

Airflow, thermal load, and suction requirements.

→

2. Safety & OSHA Compliance

Noise limits, combustible dust, and shop layout safety.

→

3. CAPEX & Strategic Analysis

Section 179, Labor ROI, and downtime revenue loss.

→

Facility & Utility Sizing

Airflow Sizer (CFM)

Calculate ventilation for cooling and air quality.

Dehumidification (PPD)

Determine moisture removal for curing or climate control.

Dust Collection (CFM)

Required suction for material extraction.

Machine Thermal Load

Size cooling based on machine BTU output.

Safety & OSHA Compliance

OSHA Noise Exposure

Calculate daily noise dose and legal limits.

Combustible Velocity

Required FPM to move materials safely through ducting.

Heat Stress Index

Workplace danger zones based on heat and humidity.

Safe Machine Spacing

Physical footprint including material handling clearance.

CAPEX & Strategic Analysis

Section 179 Savings

Immediate tax deduction for equipment purchase.

Cost of Inaction

Revenue bleed from legacy equipment downtime.

Labor ROI (Payback)

Months until machine labor savings covers the cost.

Material Waste Savings

Monthly profit increase from scrap reduction.

Airflow Sizer

Recommended Airflow:

0 CFM

Dehumidification

Moisture Removal:

0 PPD

Dust Collection

Min. Suction Needed:

0 CFM

Machine Thermal Load

Heat Output:

0 BTU/hr

Cooling: 0 Tons

OSHA Noise Dose

Daily OSHA Dose:

0%

Duct Velocity

Required Volume:

0 CFM

Heat Stress Index

Feels Like:

0 °F

Safe Footprint

Safe Shop Area:

0 Sq Ft

Section 179 Savings

Tax Savings:

$0

Net Cost: $0

Cost of Inaction

Monthly Loss:

$0

Labor ROI

Payback Period:

0 Months

Waste Reduction

Monthly Savings:

$0

Request Expert Consultation

Our tool specialists are ready to help you find the perfect solution for your specific application.

Your information is secure and will only be used to respond to your inquiry.

Why buy from Iron Line Tools

☎
Talk to a real expert right awayCall (888) 308-5580 now. A real person answers 7 AM–7 PM CT, 7 days a week.
%
We pay your sales taxSales tax is on us (IL excluded).
$
Pay over timePay over time with Shop Pay Installments at checkout, subject to approval. Questions? Call (888) 308-5580, Mon–Sun 7:00 AM–7:00 PM Central.

MRCOOL DIY questions, answered

Can I really install an MRCOOL DIY mini-split myself?
Yes. MRCOOL designed its DIY series for homeowner installation, with no special tools or training needed. The line sets come pre-charged with refrigerant and use Quick Connect® fittings, so there's no vacuum pump or refrigerant handling. Electrical hookup should follow your local code, and many areas require a licensed electrician for that part.
What size mini-split do I need?
MRCOOL's general guide for wall-mounted units with 8 ft ceilings: 6K BTU up to about 200 sq ft, 9K up to 400, 12K up to 550, 18K up to 800, 24K up to 1,050 and 36K up to 1,550. Insulation, windows, ceiling height and climate all change the answer, and MRCOOL recommends a professional load calculation for best results.
Do I need 115V or 230V?
In the 5th Gen DIY single-zone line, the 9K and 12K run on 115V. The 18K, 24K and 36K need 208/230V. Check the spec sheet on each product page for the circuit size.
Single zone or multi-zone?
A single-zone system has one indoor unit for one room. A multi-zone system runs two to five indoor units from one outdoor unit, so each room can be set to its own temperature. See our multi-zone systems, or call us and we'll help size each room.
What warranty comes with it?
The warranty comes from MRCOOL. For the 5th Gen DIY condensers, MRCOOL lists a base warranty of 5 years on parts and 7 years on the compressor. See MRCOOL's warranty terms for registration and installation requirements.
How long does shipping take?
Orders placed before 2:00 PM ET are handled in 1–3 business days, and transit takes 1–10 business days, so most orders arrive within 2–13 business days. Shipping cost is shown at checkout. You'll get tracking by email as soon as it ships. See our shipping policy.
Can I return it?
Yes, and we don't charge restocking fees. Contact us first at info@ironlinetools.com or (888) 308-5580, and see our refund policy for the details.
Do you offer financing?
Pay over time with Shop Pay Installments at checkout, subject to approval. Questions? Call (888) 308-5580, Mon–Sun 7:00 AM–7:00 PM Central.
CAPITAL ACCESS

EQUIPMENT FINANCING

AVAILABLE

Preserve cash flow with up to 60 month financing.

Job Site Proven

Trusted by Facilities and manufacturing centers

California Air Tools 8010 Ultra Quiet 1.0 Hp, Oil-Free, Lightweight 8-Gallon Air Compressor
Natalie Ochoa | Lingua Franca Field Verified

The Air Compressor at Lingua Franca

"Hi! We currently have the compressor in-house in our machine embroidery production studio. It's been working great for us! Thank you for reaching out. I've attached an image of the compressor in our studio. Best, Natalie"

California Air Tools 8010 Ultra Quiet
JLT #180A-M2 Pneumatic Panel Flattener Customer review image
Travis Farwell | Farwell's Fine Woodworking Field Verified

I hope this helps

"I have attached the pictures of how I use my panel flattener. I hope this helps."

JLT #180A-M2 Pneumatic Panel Flattener
Mike Yaross Field Verified

Just what I needed

"Saw works great. Just what I needed. You may want to update the specs though. It says 110v but it’s 220v. I don’t think it will an 10” saw blade either. Haven’t tried but I don’t think it’s set up for one like it says. Ordering process was nice and easy. Thank you."

Castaly 12" Radial Arm Saw RS-612
FRANCISCO, Shop Manager Field Verified

Built for 24/7 Production

"Got the JLT #717C for our shop and it’s an absolute beast for narrow stile doors. The 2-second squaring cycle is legit—we’re easily pushing 100+ perfect doors a day now without stressing over glue joint alignment. Setup is super fast with the pin system, and the heavy-duty build takes daily abuse without losing accuracy."

JLT #717C Cabinet Door Clamp
JLT Pressurized A8 Glue Tank for PVA Glue PIZ.9001 in shop
Lincoln Lakes Ind | Lincoln Lakes Industries LLC Field Verified

Thanks for the service!

"Here are 2 pictures of the glue tank in our shop. I hesitated to send anything as it is not in its final place but perhaps it's good enough for you. We are using it for our drawer box station and assembly station. Thanks for the service!"

JLT Pressurized A8 Glue Tank for PVA Glue PIZ.9001
Gedalya Glauber Field Verified

Purchased Machine for Partner

"I purchased this machine for our partner in China to use. We had some issues but we were able to get them fixed thanks to iron line tools."

Virutex CE53S Edge Lipping Planer for Perfect Flush Edges 5300199
Virutex TWOO AB200 Corded Dowel Jointer (120V) 7900799 vertical dowel joint cutting on panel surface ensuring precise alignment and repeatable results
David & Joyce West Field Verified

I know this will meet my requirements

"haven't had a chance to use it but it looks like a well built product have a few projects down the road and I know this will meet my requirements. so hats off to your team! David"

Virutex TWOO AB200 Corded Dowel Jointer (120V) 7900799
Virutex AU93 Double Edge Trimmer And Scraper + RC21E Manual End Trimmer SET 2800086 complete edge finishing tool set shown with dual edge trimmer and manual end trimmer.
Stuart Casterlin | Stuart Casterlin Custom Cabinets and Fine Woodworking, Inc. Field Verified

Both Tools Work Great

"Both tools work great and are real time savers . The two tools that I received from your company were replacements for the exact same tools that I've used for the past years, I think its safe to say 20+ years. Extremely pleased with product and service."

Virutex AU93 Double Edge Trimmer And Scraper + RC21E Manual End Trimmer SET 2800086
Bradley Cole, CB Anderson Shutter Co Field Verified

They are just what we needed

"We use these clamps daily, and they're very helpful for our work. We are always happy to support a small business."

JLT #812B Clamp Design
California Air Tools 10020DCAD-22060 2.0 Hp Ultra Quiet Oil-Free 10 Gallon Air Compressor angled view with dual piston pump
Mike T., Shop Manager Field Verified

Quiet, Fast, and Totally Worth It

"Bought this California Air Tools compressor for the shop and it’s an absolute game changer. It’s incredibly quiet—you can actually have a normal conversation right next to it without yelling. It fills up fast, keeps up with all our nailers and blowguns with zero issues, and the oil-free pump means no maintenance. If you're tired of loud, annoying compressors ruining the vibe on your floor, grab this bad boy. Worth every penny."

Jet 16" x 40" Engine Lathe: Geared Head, 230 V 3 Phase, 3-1/8" Spindle Bore Dia, 25 to 1,800 RPM JT9-321381
Mark D. | Machine Shop Foreman Field Verified

Heavy Duty & Precise

"Brought this Jet 16" x 40" Engine Lathe into the shop recently and it’s an absolute beast. The 3-1/8" spindle bore is exactly what we needed for turning larger bar stock, and the geared head runs incredibly smooth from 25 all the way up to 1,800 RPM. It handles our heavy daily metalwork without breaking a sweat, and you can see how solid the build is right in the photo. If you need a reliable 3-phase lathe that holds tight tolerances all day, grab this bad boy. Worth every penny."

Jet Tools Lathe
Euroboor ECO.100S+/TD Magnetic Drilling Machine angled side view with control panel and magnetic base
Martin Aguilar | KSU Corp Field Verified

ECO.100S+/T mag drill at KSU Corp

"Its been doing great thank you."

ECO.100S+/T Magnetic Drill
Euroboor TCT 1" Depth Annular Cutter tungsten carbide tipped annular cutter designed for high-performance drilling in hard steel and abrasive materials.
LEKS KAMIHIRA Field Verified

Yep we got the cutter

"Yep we got the cutter. We haven’t used it, the project we purchased it for has ended. Shipping was fast and I had no issues getting my order"

Euroboor TCT 1" Depth Annular Cutter
Virutex Hand-Held Hot Air Edgebander Set AG52F AG98F AU93 RC21E 5200199 showing complete kit with edgebander, tape roll holder, and accessories
Jesse Pegorsch Field Verified

The edge bender is working great! 

"The edge bender is working great! I’ll keep you in mind next time I need something for my shop"

Virutex Hand-Held Hot Air Edgebander Set AG52F: AG98F + AU93 + RC21E 5200199
Virutex Hand-Held Hot Air Edgebander Set AG52F AG98F AU93 RC21E 5200199 showing complete kit with edgebander, tape roll holder, and accessories
Troy Zimmerman | Martinsburg Field Verified

AG52F edgebander in Martinsburg

"It's doing all right thanks"

AG52F edgebander
California Air Tools 91335 Gasket for 255C pressure pot replacement sealing ring close-up view
Francisco Clemente | Wood Artist Field Verified

Everything Arrived Safe

"Yes, everything arrived safe in Texas, the home of a family who gladly sent the CAT 91335 Gasket to me"

Industrial Grade IronLine X1
Virutex Wheel Cutter Set of 2 Wheel Cutters for Laminate and Veneer 1527075 in retail packaging showing replacement cutting wheels
Bryce Bamsey Field Verified

Thanks for checking in.

"I believe they are working well judging by none of the guys have said anything about them other than a thank you for swapping them out for them hahah. So thanks for checking in."

Virutex Wheel Cutter Set Of 2 Wheel Cutters For Laminate And Veneer 1527075
Virutex hard metal metric lock mortising bits for FC116U lock mortiser
Lindolfo Araujo | Quality trim work LLC Field Verified

The Virutex mortising bits in Avondale

"They are doing great."

Virutex mortising bits
Jesse Browning Field Verified

Figured it out

"I had issues initially with the order but iron line tools helped me figure it out and sent me another Handheld Gluer. Very good service."

Virutex EM125T Handheld Gluer With Upper Roller 2500300
View Full Case Studies
Frequently Asked Questions for MRCOOL
The MRCOOL Signature MCAESAS4T3621AA has an efficiency rating of up to 14.3 SEER2.
This is a 3-ton condenser with a cooling capacity of 33,000 BTU.
This unit includes a 10-year parts warranty and a limited lifetime compressor warranty.
Yes, as a split air conditioner condenser it requires a separate compatible indoor coil and air handler to operate.
This condenser uses R-454B refrigerant.

Recently viewed

What a privilege to help great companies #getworkdone:

OUTFITTING FACILITIES FROM COAST TO COAST

Iron Line Tools provides the critical equipment that industrial and manufacturing operations rely on to execute at the highest level.

Field Reports

Mrcool Signature Series Air Conditioner Condenser MCAESAS4T3621AA Reviews