Henley Sherwood 21kW Boiler Eco Stove | ST473
Henley Sherwood 21kW Boiler Eco Stove | ST473 is backordered and will ship as soon as it is back in stock.
Description
Description
Henley Sherwood 21kW Boiler Eco Stove | ST473
The Henley Sherwood 21kW is a high-output multifuel boiler stove designed to heat both your room and your central heating system simultaneously. With a nominal output of 12.8kW (up to 21kW maximum), it delivers 8.1kW to the room and 4.7kW to water at nominal output, rising to 8.1kW room and 13kW water at maximum output. A+ energy rated, 80.1% efficient, and DEFRA exempt, it is one of the most powerful boiler stoves available for Irish homes. Backed by a 3-year warranty when registered online.
Key Features
- 21kW maximum total heat output (12.8kW nominal)
- 8.1kW to room and 4.7kW to water at nominal output
- Up to 8.1kW to room and 13kW to water at maximum output
- 80.1% efficiency, A+ energy rating
- DEFRA exempt, suitable for smoke control areas
- Multifuel, burns wood and solid fuel
- External air connection for airtight and new-build homes
- Clean burn tertiary air system for lower emissions
- Advanced airwash system to keep the glass clear
- Primary and secondary air controls
- Cast iron door, matt black finish
- 153mm flue outlet
- 3-year warranty when registered online within 3 months of purchase
Room and Water Output Explained
The Sherwood 21kW splits its heat output between the room and your central heating system. At nominal burn, 8.1kW heats the room directly and 4.7kW goes to the water circuit. At maximum output, up to 13kW is delivered to the water, making it capable of replacing or significantly supplementing an oil or gas boiler in many Irish homes. This makes it an excellent choice for reducing reliance on fossil fuel central heating.
External Air
The Sherwood includes an external air connection, allowing combustion air to be drawn directly from outside the building rather than from the room. This is required for heat recovery ventilation systems in new-build and airtight homes, and improves overall efficiency.
Clean Burn System
A tertiary air system pushes hot air into the firebox above the normal flame height, allowing excess gases to combust fully for a cleaner, more efficient burn with lower particulate emissions.
Airwash
A specially placed vent draws air across the inside of the glass, keeping it clear and giving you an unobstructed view of the flame throughout the burn.
Warranty
Includes 1 year standard manufacturer's warranty. Register your stove online within 3 months of purchase to receive an additional 2 years, giving 3 years total cover.
Technical Specifications
| Feature | Specification |
|---|---|
| Brand | Henley |
| SKU | ST473 |
| Type | Multifuel boiler eco stove |
| Fuel | Multifuel (wood and solid fuel) |
| Total Output (nominal) | 12.8kW |
| Total Output (maximum) | 21kW |
| Room Output (nominal) | 8.1kW |
| Room Output (maximum) | 8.1kW |
| Water Output (nominal) | 4.7kW |
| Water Output (maximum) | 13kW |
| Efficiency | 80.1% |
| Energy Rating | A+ |
| DEFRA Exempt | Yes |
| External Air | Yes |
| Flue Size | 153mm |
| Finish | Matt black |
| Warranty | 3 years (when registered online) |
Shipping & Delivery
Shipping & Delivery
Ganly's offers both home delivery and Click-and-Collect options.
Home Delivery
| Delivery Type | Cost | Notes |
|---|---|---|
| Local Delivery | €15 | Within 20km of Athlone, Mountbellew & Longford |
| Small Items | €9.95 | 1–4 working days, nationwide |
| Medium / Large Items | €29.95 | 3–10 working days, nationwide |
| Bulky / Oversized | €49.95 | 3–10 working days, nationwide |
We have partnered with DPD to provide fast and secure delivery anywhere in Ireland and Northern Ireland. To track your DPD parcel, click HERE.
DPD delivery covers all of Ireland and Northern Ireland for €9.95 up to 31kg. Excluding bulky and oversized items, we do not charge extra for multiple items shipping to the same address.
Please allow 1–4 working days for standard delivery. Large items, pallets, and bulky or oversized items can take up to 10 working days. Items that are special order from the manufacturer may take longer. You will be notified if there is an extended delivery time on any item you purchase.
We will notify you by email once your order has been dispatched and provide a tracking number so you can track your order. Our delivery drivers will call you approximately one hour before delivery. A signature is required on all deliveries.
Click-and-Collect
Any item ordered online can be collected from any Ganly's store. Simply choose the "Collect In-Store" option at checkout and select your preferred store, date, and time. We will have the item ready for you as quickly as possible.
Click-and-Collect orders do not incur a delivery charge. You will receive an email confirming when your item is ready for collection. Please bring a printed or digital copy of your order confirmation when collecting.
Order Processing & Shipping
We process orders 6 days a week, all year round, excluding bank holidays and public holidays. Our courier partners collect orders at 3pm Monday to Friday. Orders placed on Friday after 3pm will be collected the following Monday.
Please check the contents of your package on arrival. If any items are damaged during shipment, notify us immediately upon opening the package and retain all packaging materials.
Damages & Returns
When you purchase online, you have a statutory right to return a product (other than perishable goods) within 14 days of delivery (cooling-off period). We can amend or cancel an order up until it is dispatched. If the order has already been dispatched, you may return the product for a refund, excluding return delivery costs. If a product is damaged or faulty, please contact us and we will arrange a replacement or refund.
Please Note: We will not be liable for any failure to perform, or delay in performance of, any of our obligations under a contract caused by events outside our reasonable control (Force Majeure). This includes, without limitation: strikes, civil commotion, riot, invasion, terrorist attack, war, fire, explosion, storm, flood, earthquake, epidemic, or the impossibility of using public or private transport or telecommunications networks.
Contact Us
Phone: 090 643 5300
Email: info@ganlys.ie
Ganly's Returns — 3 Easy Ways
Step 1 — Return In-Store
Bring a copy of your emailed receipt along with the item to any Ganly's store for an exchange or refund.
Step 2 — Post or Courier
Send the item back via post or courier, including your order number and a contact phone number. Once we receive the item in its original condition, we will contact you to arrange your refund or exchange. If the item is not returned in full merchantable quality with original packaging, a discounted refund may apply.
Step 3 — We Collect It
Call us on (090) 643 5300 and we will arrange a courier collection from your address. This service costs €9.00, which will be deducted from your refund or exchange amount. Available for addresses within the island of Ireland only.
Return Address:
Ganly's Athlone
Roscommon Road,
Athlone,
Co. Westmeath
N37 K303
Phone: (090) 643 5300
Email: info@ganlys.ie
Please Note: Refunds exclude delivery charges. All items must be returned in their original condition, including manufacturer's packaging, tags, documentation, and any accessories. Items must be returned within 14 days of receiving your order.
Returns Policy
Returns Policy
When you make an online purchase you have a statutory right to return goods up to 14 days after receiving your order: this is the cooling off period. For our full Returns Policy
Henley Sherwood 21kW Boiler Eco Stove | ST473 is backordered and will ship as soon as it is back in stock.
Payment & Security
Payment methods
We ensure secure processing of your payment information and do not retain or have any access to your credit card details.

