What's in this package
Everything shown here ships as part of this package. Select a piece to see its description, specs and manuals.
Description
The CENTRALHK20 is a 20 kW auxiliary heat kit for the MRCOOL Central Ducted Air Handler. It measures 10.16 in D x 8.03 in H x 21.06 in W and runs on 208/230 V power.
Highlights
- 20 kW auxiliary heating element delivers the largest electric backup output in this MRCOOL heat kit range.
- 208/230 V operation matches the supply already serving this equipment.
- Published minimum circuit ampacity of 46/53 and max fuse breaker of 50/60 let an electrician size the circuit before install.
- Compact 10.16 in D x 8.03 in H x 21.06 in W body fits inside the air handler cabinet.
- 10.1 lb net weight keeps the kit manageable during installation.
Details
Avermont Direct is an authorized MRCOOL dealer, and this heat kit ships as genuine MRCOOL equipment backed by the manufacturer's warranty — see product documentation for full terms. A 20 kW kit suits larger ducted homes that need substantial supplemental electric heat on cold days, when a heat pump alone needs help holding the setpoint. Sizing and installation should be handled by a qualified HVAC technician working from the documentation supplied with the unit.
Need Help?
If you are unsure which heat kit size suits your system, we are glad to walk through it with you.
If you have questions about this product before you order, our team is happy to help.
Email: support@avermontdirect.com
Phone: +1 (844) 455-3695
Hours: Monday–Friday, 9AM–5PM
Live Chat: Available 24/7
| Dimensions | 10.16 in D x 8.03 in H x 21.06 in W |
|---|---|
| Unit Type | Accessories |
| Equipment Type | Heat Kit |
| Voltage | 208/230 V |
| Max Fuse Breaker | 50/60 |
| Min Circuit Ampacity | 46/53 |
| Auxiliary Heater Sizes | 20kw |
| Net Weight | 10.1 lbs |
| Gross Depth | 14.37 in |
| Gross Height | 10.24 in |
| Gross Width | 24.02 in |
| Gross Weight | 15.7 lbs |
| Returns | Final sale — MRCOOL accessories are non-returnable |
- Accessory heat kit that installs into the air handler rather than operating as a standalone unit.
- Dual electrical values reflect the 208 V and 230 V supply options.
- Confirm your air handler model and available electrical capacity before ordering.
Shipping
- Orders of $200 or more ship free within the contiguous United States. Orders under $200 ship for a flat $9.99.
- In-stock items (shown as “In Stock” on the product page) ordered before 1:00 PM Pacific Time on a business day typically ship within 1–3 business days. Delivery usually takes 3–7 business days after shipping.
- Backorder, Partial Backorder and Custom Order items are not covered by the 1–3 business day processing time. Their estimated restock or ship time is shown in the stock status on the product page before you order.
- Large items ship by freight and are typically delivered curbside. Smaller items ship by ground carrier such as FedEx or UPS.
- We ship to the 48 contiguous states. We do not ship to Alaska, Hawaii or P.O. boxes.
- Please inspect your delivery on arrival and report any concealed damage or missing parts within 24 hours.
Returns
- Returns can be requested within 30 days of delivery. Items must be unused, uninstalled, in new resalable condition and in their original packaging, including the pallet if delivered on one.
- Approved returns are subject to a 15% restocking fee, and return shipping costs are the customer’s responsibility unless the return is the result of our error.
- Installed or used products, custom and made-to-order items, clearance or final-sale items, and replacement parts and accessories are not eligible for return.
Full Shipping Policy Full Return Policy Questions? +1 (844) 455-3695

