Description

The A-18-HP-WMAH-230D-O — MRCOOL 18,000 BTU Wall Mount Air Handler – A-18-HP-WMAH-230D-O — is stocked and shipped by Buy Comfort Direct from Winder, Georgia. Specifications, fitment notes and ordering details are below; call (877) 843-4822 if you need it matched to your equipment first.

About the A-18-HP-WMAH-230D-O

* {
box-sizing: border-box;
margin: 0;
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#product-container {
font-family: ‘Segoe UI’, Tahoma, Geneva, Verdana, sans-serif;
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margin: 25px 0 12px 0;
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#product-container p {
line-height: 1.8;
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.intro-section {
background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
padding: 25px;
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margin: 25px 0;
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margin: 25px 0;
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background: #fff4f2;
border-radius: 6px;
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margin-bottom: 10px;
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.notice-card ul {
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.notice-card p {
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width: 100%;
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margin: 20px 0;
box-shadow: 0 2px 8px rgba(0,0,0,0.1);
border-radius: 8px;
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}

.specs-table thead {
background: linear-gradient(135deg, #D53938 0%, #b32d2c 100%);
color: white;
}

.specs-table th {
padding: 15px;
text-align: left;
font-weight: 600;
font-size: 1.1em;
}

.specs-table td {
padding: 12px 15px;
border-bottom: 1px solid #e0e0e0;
}

.specs-table tbody tr {
background: #fff;
transition: all 0.3s ease;
}

.specs-table tbody tr:nth-child(even) {
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background: linear-gradient(90deg, #D53938 0%, #b32d2c 100%) !important;
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.warranty-section {
background: linear-gradient(135deg, #F8F9FA 0%, #e9ecef 100%);
padding: 50px 30px;
border-radius: 15px;
margin: 50px 0;
}

.warranty-section h2 {
color: #D53938;
text-align: center;
margin-bottom: 40px;
font-size: 28px;
}

.warranty-grid {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
gap: 30px;
max-width: 800px;
margin: 0 auto;
}

.warranty-card {
background: white;
padding: 30px;
border-radius: 12px;
text-align: center;
border: 2px solid rgba(213,57,56,0.3);
transition: all 0.3s ease;
}

.warranty-card:hover {
background: rgba(213,57,56,0.05);
border-color: #D53938;
transform: translateY(-5px);
}

.warranty-years {
font-size: 48px;
font-weight: 700;
color: #D53938;
}

.warranty-label {
color: #333;
font-size: 14px;
font-weight: 600;
}

.cta-section {
background: linear-gradient(135deg, #F8F9FA 0%, #e9ecef 100%);
padding: 60px 30px;
border-radius: 15px;
margin-top: 50px;
box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

.cta-content {
text-align: center;
margin-bottom: 40px;
}

.cta-section h2 {
color: #D53938;
margin: 0 0 15px 0;
font-size: 28px;
font-weight: 700;
}

.cta-section p {
color: #333;
margin: 0;
font-size: 16px;
max-width: 700px;
margin-left: auto;
margin-right: auto;
line-height: 1.6;
}

/* Small print under a warranty grid and under the CTA. Both were written as
inline style attributes until 2026-08-06 — core/layout.py emits bare
classes now, so the whole document’s styling lives in this block.
See LAYOUT_CONTRACT.md (“Brand theme”). */
.warranty-note {
margin-top: 15px;
text-align: center;
color: #666;
font-size: 0.9em;
}

.cta-note {
margin-top: 20px;
text-align: center;
color: #666;
font-size: 0.9em;
}

.compliance-badge {
background: rgba(213,57,56,0.05);
border: 2px solid #D53938;
border-radius: 12px;
padding: 25px 30px;
display: flex;
align-items: center;
gap: 20px;
max-width: 700px;
margin: 0 auto;
transition: all 0.3s ease;
}

.compliance-badge:hover {
background: rgba(87,169,249,0.05);
transform: translateY(-2px);
box-shadow: 0 8px 20px rgba(213,57,56,0.2);
}

.badge-icon {
font-size: 32px;
color: #D53938;
font-weight: 700;
background: rgba(213,57,56,0.2);
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height: 50px;
border-radius: 50%;
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color: #555;
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/* CSS-only tabs – no JavaScript required */
.tab-container {
margin: 30px 0;
}

.tab-radio {
display: none;
}

.tab-label {
display: inline-block;
padding: 12px 24px;
background: #f8f9fa;
border: 2px solid #ddd;
border-radius: 8px 8px 0 0;
cursor: pointer;
font-size: 1em;
font-weight: 600;
color: #333;
transition: all 0.3s ease;
margin-right: 5px;
margin-bottom: -2px;
position: relative;
}

.tab-label:hover {
background: #e9ecef;
border-color: #57A9F9;
}

.tab-radio:checked + .tab-label {
background: linear-gradient(135deg, #D53938 0%, #b32d2c 100%);
color: white;
border-color: #D53938;
border-bottom-color: #D53938;
z-index: 2;
}

.tab-panels {
border: 2px solid #ddd;
border-radius: 0 8px 8px 8px;
padding: 20px;
background: #fff;
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.tab-panel {
display: none;
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/* Show panel based on which radio is checked – supports up to 5 tabs */
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.tab-radio:nth-of-type(3):checked ~ .tab-panels .tab-panel:nth-of-type(3),
.tab-radio:nth-of-type(4):checked ~ .tab-panels .tab-panel:nth-of-type(4),
.tab-radio:nth-of-type(5):checked ~ .tab-panels .tab-panel:nth-of-type(5) {
display: block;
}

@media (max-width: 768px) {
#product-container {
padding: 15px;
}

#product-container h1 {
font-size: 1.8em;
}

#product-container h2 {
font-size: 1.4em;
}

.specs-table {
font-size: 0.9em;
}

.specs-table th,
.specs-table td {
padding: 10px;
}

.compliance-badge {
flex-direction: column;
text-align: center;
padding: 20px;
}

.badge-content {
text-align: center;
}

.cta-section {
padding: 40px 20px;
}

.tab-label {
display: block;
width: 100%;
margin-right: 0;
margin-bottom: 5px;
border-radius: 8px;
}

.tab-panels {
border-radius: 8px;
}
}

Where the A-18-HP-WMAH-230D-O fits

This is the indoor unit by itself — a wall-mount head. It pairs with a matching MRCOOL outdoor condenser. It is rated at 18,000 BTU. This line is meant for professional installation, with evacuation and charging done by a licensed technician.

See the rest of the range in MRCOOL mini splits, or run the numbers with our HVAC sizing tool. Not sure what pairs with what? Call (877) 843-4822 and we will check it before you buy.

A-18-HP-WMAH-230D-O: fitment and resources

Equipment ratings are only valid as an AHRI-matched pairing; confirm the match before ordering. Our free HVAC system sizing tool gives a starting point for tonnage, and Background reading: the AHRI Directory of Certified Product Performance. Browse the rest of our Advantage or the MRCOOL catalog, and see what customers say on our reviews page.

Ordering and delivery

In-stock items ship from our Winder, Georgia warehouse; orders over $99 ship free. Large equipment travels by freight carrier and parts by ground, with tracking by email. Financing is available at checkout through Affirm, and contractors can set up a contractor account for trade pricing. Questions before you pay? Use the contact page or call (877) 843-4822.

A-18-HP-WMAH-230D-O FAQ

Does the A-18-HP-WMAH-230D-O ship free?

Yes on orders over $99 — most orders that include it qualify.

How do I know it fits my system?

Send us your equipment model number through the contact page or call (877) 843-4822 and we will confirm the match before it ships.