MRCOOL® Pre-Charged Cased Coil with R-454B
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MRCOOL® Pre-Charged Cased A-Coil (MCMP*OTB Series) — R-454B, Pre-Installed TXV, Multi-Position, CoolGuard®
Upgrade smarter. Install easier. Live better. The MRCOOL® Pre-Charged Cased A-Coil is a next-generation, pre-charged evaporator coil designed for modern, high-efficiency HVAC systems. Featuring R-454B refrigerant, pre-installed TXV, CoolGuard® corrosion-resistant coil, and multi-position flexibility (upflow, downflow, horizontal), this coil streamlines installation—especially when paired with MRCOOL® No-Vac® pre-charged line sets. It’s a simple, safe, and sustainable way to upgrade home comfort.
Why Choose the MRCOOL® Pre-Charged Coil?
- Pre-Charged with R-454B (Low-GWP): Eco-forward refrigerant choice.
- Plug-and-Play Friendly: Engineered for MRCOOL® No-Vac® pre-charged line sets for a simpler, cleaner install.
- Pre-Installed TXV: Optimizes refrigerant flow for reliable, high-efficiency performance.
- CoolGuard® Corrosion-Resistant Coil: Durable construction that protects your investment.
- Multi-Position Application: Flexible installation options—upflow, downflow, horizontal left, or horizontal right.
- Built-In A2L Leak Detection Sensor: Added safety for peace of mind.
- Compact Design: Ideal for tight mechanical spaces and retrofit installations.
- 10-Year Limited Parts Warranty.
Dual Fuel Ready: Heat Pump + Furnace + Pre-Charged Coil
Build a powerful dual fuel system by pairing this pre-charged A-coil with a compatible heat pump and your existing gas furnace. The system can choose the most efficient heat source—electric heat pump in milder weather, gas furnace during extreme cold—while delivering energy-efficient cooling all summer.
High-Efficiency, Safety-Focused, Installer-Friendly
The MRCOOL® Pre-Charged Cased A-Coil (MCMP*OTB Series) is engineered for high-efficiency HVAC requirements. With R-454B refrigerant, a pre-installed TXV, and a CoolGuard® corrosion-resistant coil, you get dependable performance and long-term durability. Pair it with MRCOOL® No-Vac® pre-charged line sets to streamline installation and minimize handling—ideal for upgrades and retrofits seeking speed, consistency, and quality results.
Available Models (Indoor – MCMP*OTB)
- MCMP1824AOTB (1.5–2 Ton / 18K–24K BTU A-Coil)
- MCMP1824BOTB (1.5–2 Ton / 18K–24K BTU A-Coil)
- MCMP3036BOTB (2.5–3 Ton / 30K–36K BTU A-Coil)
- MCMP4860COTB (4–5 Ton / 48K–60K BTU A-Coil)
- MCMP4860DOTB (4–5 Ton / 48K–60K BTU A-Coil)
| Model | Power Supply | Net Dimensions (W×D×H) | Packaging Dimensions (W×D×H) | Weight (Net/Gross) | Refrigerant | Liquid / Gas Line |
|---|---|---|---|---|---|---|
| MCMP1824AOTB | 24V, 60Hz, 1Ph | 14.5″ × 21″ × 18″ | 16.92″ × 25.39″ × 19.88″ | 42 / 50 lbs | R-454B | 3/8″ / 3/4″ |
| MCMP1824BOTB | 24V, 60Hz, 1Ph | 17.5″ × 21″ × 18″ | 20.47″ × 26.18″ × 20.47″ | 42 / 50 lbs | R-454B | 3/8″ / 3/4″ |
| MCMP3036BOTB | 24V, 60Hz, 1Ph | 17.5″ × 21″ × 23.5″ | 20.47″ × 26.18″ × 25.39″ | 59.5 / 68 lbs | R-454B | 3/8″ / 3/4″ |
| MCMP4860COTB | 24V, 60Hz, 1Ph | 21.625″ × 21.5″ × 27.75″ | 31.69″ × 25.59″ × 26.57″ | 97 / 115 lbs | R-454B | 3/8″ / 3/4″ |
| MCMP4860DOTB | 24V, 60Hz, 1Ph | 24.5″ × 21″ × 28″ | 27.75″ × 26.18″ × 30.31″ | 81 / 92 lbs | R-454B | 3/8″ / 3/4″ |
Installation Flexibility
This cased A-coil supports upflow, downflow, horizontal right, and horizontal left orientations, making it adaptable to a wide range of residential layouts and retrofit conditions. Compact cabinet sizing helps reduce install time and fit challenges.
Best Pairings & Use Cases
- Ideal for dual fuel systems (heat pump + gas furnace) seeking efficient year-round comfort.
- Great for retrofits and upgrades where installation speed and reliability matter.
- Compatible with MRCOOL® No-Vac® pre-charged line sets for simplified, cleaner installs.
Warranty
10-Year Limited Parts Warranty when properly registered. See manufacturer terms and conditions for details.
Frequently Asked Questions
What makes a “pre-charged” A-coil different?
It ships with R-454B refrigerant and is designed to pair with No-Vac® pre-charged line sets for a faster, cleaner installation.
Does this coil work in multiple positions?
Yes—upflow, downflow, horizontal right, and horizontal left orientations are supported.
Is there built-in leak detection?
Yes, it includes an A2L leak detection sensor for enhanced safety.
Can I use this in a dual fuel system?
Absolutely. Pair with a compatible heat pump and gas furnace so the system can choose the most efficient heat source.
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Upgrade Faster with MRCOOL Pre-Charged A-Coils
MRCOOL pre-charged A-coils are designed to simplify HVAC upgrades without sacrificing performance. Built for use with MRCOOL No-Vac® line sets, these coils eliminate the need for vacuuming and manual refrigerant charging, making installation faster, easier, and more accessible for both homeowners and professionals. Whether you're replacing an existing coil or building a high-efficiency system, MRCOOL delivers reliable comfort with less hassle.
No Vacuum Required Installation
Factory Pre-Charged with R-454B Refrigerant
High-Efficiency Heating & Cooling Performance
Compatible with Existing Furnaces & Systems
Installation Notice: MRCOOL pre-charged A-coils are designed for simplified installation using No-Vac® line sets. System compatibility, electrical, and local code requirements should always be verified before installation. For gas furnace integration, professional installation may be required depending on your setup.
Rated 4.7 / 5 Stars
4700+ Verified Reviews
Comfort That Speaks for Itself
See why homeowners and pros alike trust MRCOOL DIY systems to deliver comfort, savings, and easy installation.
I never thought I’d install my own HVAC system, but MRCOOL made it possible. The instructions were easy, and the pre-charged lines saved me from hiring a tech. Cools my garage workshop perfectly!
Our MRCOOL mini-split runs really quiet — you can barely tell it’s on. Our electric bill dropped about 35% this summer. Very impressed with the efficiency
Installed this in my detached office. Took me a Saturday morning and a friend to lift the outdoor unit. Works flawlessly — heats in winter and cools in summer.
I swapped my old central unit for two MRCOOL DIY mini-splits. Same comfort, way lower bills. The inverter technology really makes a difference.
Had a small question during installation and Vanessa picked up right away. They walked me through it step by step — best customer service I’ve had in years.
Keeps our sunroom comfortable in 100°F summers and comfy in the winter. The heat pump feature is amazing — one system for both heating and cooling!
I’ve remodeled a few homes, and MRCOOL DIY systems are a game-changer. No need for HVAC pros or special tools — everything is plug-and-play.
I never thought I’d install my own HVAC system, but MRCOOL made it possible. The instructions were easy, and the pre-charged lines saved me from hiring a tech. Cools my garage workshop perfectly!
Our MRCOOL mini-split runs really quiet — you can barely tell it’s on. Our electric bill dropped about 35% this summer. Very impressed with the efficiency
Installed this in my detached office. Took me a Saturday morning and a friend to lift the outdoor unit. Works flawlessly — heats in winter and cools in summer.
I swapped my old central unit for two MRCOOL DIY mini-splits. Same comfort, way lower bills. The inverter technology really makes a difference.
Had a small question during installation and Vanessa picked up right away. They walked me through it step by step — best customer service I’ve had in years.
Keeps our sunroom comfortable in 100°F summers and comfy in the winter. The heat pump feature is amazing — one system for both heating and cooling!
I’ve remodeled a few homes, and MRCOOL DIY systems are a game-changer. No need for HVAC pros or special tools — everything is plug-and-play.
I never thought I’d install my own HVAC system, but MRCOOL made it possible. The instructions were easy, and the pre-charged lines saved me from hiring a tech. Cools my garage workshop perfectly!
Our MRCOOL mini-split runs really quiet — you can barely tell it’s on. Our electric bill dropped about 35% this summer. Very impressed with the efficiency
Installed this in my detached office. Took me a Saturday morning and a friend to lift the outdoor unit. Works flawlessly — heats in winter and cools in summer.
I swapped my old central unit for two MRCOOL DIY mini-splits. Same comfort, way lower bills. The inverter technology really makes a difference.
Had a small question during installation and Vanessa picked up right away. They walked me through it step by step — best customer service I’ve had in years.
Keeps our sunroom comfortable in 100°F summers and comfy in the winter. The heat pump feature is amazing — one system for both heating and cooling!
I’ve remodeled a few homes, and MRCOOL DIY systems are a game-changer. No need for HVAC pros or special tools — everything is plug-and-play.
I never thought I’d install my own HVAC system, but MRCOOL made it possible. The instructions were easy, and the pre-charged lines saved me from hiring a tech. Cools my garage workshop perfectly!
Our MRCOOL mini-split runs really quiet — you can barely tell it’s on. Our electric bill dropped about 35% this summer. Very impressed with the efficiency
Installed this in my detached office. Took me a Saturday morning and a friend to lift the outdoor unit. Works flawlessly — heats in winter and cools in summer.
I swapped my old central unit for two MRCOOL DIY mini-splits. Same comfort, way lower bills. The inverter technology really makes a difference.
Had a small question during installation and Vanessa picked up right away. They walked me through it step by step — best customer service I’ve had in years.
Keeps our sunroom comfortable in 100°F summers and comfy in the winter. The heat pump feature is amazing — one system for both heating and cooling!
I’ve remodeled a few homes, and MRCOOL DIY systems are a game-changer. No need for HVAC pros or special tools — everything is plug-and-play.
I never thought I’d install my own HVAC system, but MRCOOL made it possible. The instructions were easy, and the pre-charged lines saved me from hiring a tech. Cools my garage workshop perfectly!
Our MRCOOL mini-split runs really quiet — you can barely tell it’s on. Our electric bill dropped about 35% this summer. Very impressed with the efficiency
Installed this in my detached office. Took me a Saturday morning and a friend to lift the outdoor unit. Works flawlessly — heats in winter and cools in summer.
I swapped my old central unit for two MRCOOL DIY mini-splits. Same comfort, way lower bills. The inverter technology really makes a difference.
Had a small question during installation and Vanessa picked up right away. They walked me through it step by step — best customer service I’ve had in years.
Keeps our sunroom comfortable in 100°F summers and comfy in the winter. The heat pump feature is amazing — one system for both heating and cooling!
I’ve remodeled a few homes, and MRCOOL DIY systems are a game-changer. No need for HVAC pros or special tools — everything is plug-and-play.
I never thought I’d install my own HVAC system, but MRCOOL made it possible. The instructions were easy, and the pre-charged lines saved me from hiring a tech. Cools my garage workshop perfectly!
Our MRCOOL mini-split runs really quiet — you can barely tell it’s on. Our electric bill dropped about 35% this summer. Very impressed with the efficiency
Installed this in my detached office. Took me a Saturday morning and a friend to lift the outdoor unit. Works flawlessly — heats in winter and cools in summer.
I swapped my old central unit for two MRCOOL DIY mini-splits. Same comfort, way lower bills. The inverter technology really makes a difference.
Had a small question during installation and Vanessa picked up right away. They walked me through it step by step — best customer service I’ve had in years.
Keeps our sunroom comfortable in 100°F summers and comfy in the winter. The heat pump feature is amazing — one system for both heating and cooling!
I’ve remodeled a few homes, and MRCOOL DIY systems are a game-changer. No need for HVAC pros or special tools — everything is plug-and-play.
I never thought I’d install my own HVAC system, but MRCOOL made it possible. The instructions were easy, and the pre-charged lines saved me from hiring a tech. Cools my garage workshop perfectly!
Our MRCOOL mini-split runs really quiet — you can barely tell it’s on. Our electric bill dropped about 35% this summer. Very impressed with the efficiency
Installed this in my detached office. Took me a Saturday morning and a friend to lift the outdoor unit. Works flawlessly — heats in winter and cools in summer.
I swapped my old central unit for two MRCOOL DIY mini-splits. Same comfort, way lower bills. The inverter technology really makes a difference.
Had a small question during installation and Vanessa picked up right away. They walked me through it step by step — best customer service I’ve had in years.
Keeps our sunroom comfortable in 100°F summers and comfy in the winter. The heat pump feature is amazing — one system for both heating and cooling!
I’ve remodeled a few homes, and MRCOOL DIY systems are a game-changer. No need for HVAC pros or special tools — everything is plug-and-play.
I never thought I’d install my own HVAC system, but MRCOOL made it possible. The instructions were easy, and the pre-charged lines saved me from hiring a tech. Cools my garage workshop perfectly!
Our MRCOOL mini-split runs really quiet — you can barely tell it’s on. Our electric bill dropped about 35% this summer. Very impressed with the efficiency
Installed this in my detached office. Took me a Saturday morning and a friend to lift the outdoor unit. Works flawlessly — heats in winter and cools in summer.
I swapped my old central unit for two MRCOOL DIY mini-splits. Same comfort, way lower bills. The inverter technology really makes a difference.
Had a small question during installation and Vanessa picked up right away. They walked me through it step by step — best customer service I’ve had in years.
Keeps our sunroom comfortable in 100°F summers and comfy in the winter. The heat pump feature is amazing — one system for both heating and cooling!
I’ve remodeled a few homes, and MRCOOL DIY systems are a game-changer. No need for HVAC pros or special tools — everything is plug-and-play.
I never thought I’d install my own HVAC system, but MRCOOL made it possible. The instructions were easy, and the pre-charged lines saved me from hiring a tech. Cools my garage workshop perfectly!
Our MRCOOL mini-split runs really quiet — you can barely tell it’s on. Our electric bill dropped about 35% this summer. Very impressed with the efficiency
Installed this in my detached office. Took me a Saturday morning and a friend to lift the outdoor unit. Works flawlessly — heats in winter and cools in summer.
I swapped my old central unit for two MRCOOL DIY mini-splits. Same comfort, way lower bills. The inverter technology really makes a difference.
Had a small question during installation and Vanessa picked up right away. They walked me through it step by step — best customer service I’ve had in years.
Keeps our sunroom comfortable in 100°F summers and comfy in the winter. The heat pump feature is amazing — one system for both heating and cooling!
I’ve remodeled a few homes, and MRCOOL DIY systems are a game-changer. No need for HVAC pros or special tools — everything is plug-and-play.
I never thought I’d install my own HVAC system, but MRCOOL made it possible. The instructions were easy, and the pre-charged lines saved me from hiring a tech. Cools my garage workshop perfectly!
Our MRCOOL mini-split runs really quiet — you can barely tell it’s on. Our electric bill dropped about 35% this summer. Very impressed with the efficiency
Installed this in my detached office. Took me a Saturday morning and a friend to lift the outdoor unit. Works flawlessly — heats in winter and cools in summer.
I swapped my old central unit for two MRCOOL DIY mini-splits. Same comfort, way lower bills. The inverter technology really makes a difference.
Had a small question during installation and Vanessa picked up right away. They walked me through it step by step — best customer service I’ve had in years.
Keeps our sunroom comfortable in 100°F summers and comfy in the winter. The heat pump feature is amazing — one system for both heating and cooling!
I’ve remodeled a few homes, and MRCOOL DIY systems are a game-changer. No need for HVAC pros or special tools — everything is plug-and-play.
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