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Ultra 399 - 317,000 BTU Output High Efficiency Boiler - Series 4 (Nat Gas or LP)
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$9,913.71 each
In Stock
Get 1 Fri, Jun 19 - Tue, Jun 23
MANUALS (7)
This item replaces: 383-500-726
Schematic Feature!
Replacement Parts
Lift Gate
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This product weighs 300 lbs. and may require the use of a lift gate. If you do require a lift gate at your delivery, you'll have the option to add this FREE of charge when you checkout.
Free Shipping This item ships free
Easy Returns No restocking fee for 90 days
Product Highlights
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Propane, Natural Gas
Direct Vent, AL29-4C, PVC
15 Year Limited (Heat Exchanger), 1 Year (Parts) Warranty
Hydronic (Water)
22-13/16" Width
Slate Gray
Description
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Heating equipment must be installed, commissioned, and serviced by a licensed and qualified professional in accordance with manufacturer instructions, applicable codes, and industry standards. Manufacturers do not accept warranty or technical support requests from homeowners or unlicensed individuals. All warranty and technical inquiries must be initiated by the licensed professional responsible for the installation.
Note: the Ultra boiler is no longer shipped with the Sentinel X100 Inhibitor & Sentinel Inhibitor Test Kit as stated in the User Guide.
Series 4 Ultra CT Boilers
Note: Product Title reflects this boiler's IBR Net Output Rating
Propane Conversion Orifice included for LP Gas Applications
Key Features
The Ultra Easy-Up Manifold Kit can speed up installation of the primary/secondary piping required on Ultra boilers. Weil-McLain's Easy-Up manifold kit is designed by the boiler manufacturer and provides the added feature of optional indirect water heater connections.
Easy-up Manifold Installation Options:
Note: the Ultra boiler is no longer shipped with the Sentinel X100 Inhibitor & Sentinel Inhibitor Test Kit as stated in the User Guide.
Series 4 Ultra CT Boilers
Note: Product Title reflects this boiler's IBR Net Output Rating
Propane Conversion Orifice included for LP Gas Applications
Key Features
- Gas fired water boiler with cast aluminum heat exchanger
- Venturi mixing body mixes air and gas providing higher efficiency
- Designed to operate in low temperature condensing applications
- Outdoor reset and domestic hot water priority standard
- Negative regulated gas valve precisely delivers gas to the boiler
- Electronic control module automatically adjusts blower speed and gas flow rate in response to environment
- Modulates with 5 to 1 turndown ratio
- Variable speed motor matches combustion output to heating needs
- High grade stainless steel burner features quiet operation, high efficiency, and cleaner combustion for low NOx applications.
The Ultra Easy-Up Manifold Kit can speed up installation of the primary/secondary piping required on Ultra boilers. Weil-McLain's Easy-Up manifold kit is designed by the boiler manufacturer and provides the added feature of optional indirect water heater connections.
Easy-up Manifold Installation Options:
Specs
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| Width (Inches): | 22-13/16" |
|---|---|
| Fuel Type: | Propane Natural Gas |
| Vent Type: | Direct Vent AL29-4C PVC |
| Efficiency: | 91.7% |
| Boiler Type: | High Efficiency |
| Color: | Slate Gray |
| System Type: | Hydronic (Water) |
| Features: | EI/Spark Ignition Direct Vent Condensing |
| Vent Size: | 4" |
| Water Connection: | 1-1/4" |
| Gas Connection: | 3/4" |
| BTU Input: | 399000 |
| DOE Rating: | 365000 |
| IBR Rating: | 317000 |
| Warranty: | 15 Year Limited (Heat Exchanger), 1 Year (Parts) |
| Depth (Inches): | 22-1/8" |
| Height (Inches): | 47.75" |
Questions?
Speak with a real person who will go out of the way to help!
Call or text 888-757-4774
Monday – Thursday
8am–7:45pm
Friday
9am–7:45pm
Saturday – Sunday
9am–5:45pm
Need help calculating?
Use Our CalculatorYou May Also Need
Ultra 399 NG (S4)
Replacement Parts
SKU: 383-500-738
Brand: Weil-McLain
Search Parts:
SEARCH PARTS
Boiler door (Slate gray)
383-500-136
Sorry, we don't currently sell this item. Request This Item
Screw flat head slotted 17 Series for jacket front door
562-650-126
Sorry, we don't currently sell this item. Request This Item
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Free Shipping
On orders over $99
We offer flexible shipping and scheduling options, up-to-date delivery estimates, and free ground shipping on any order over $99 to make sure your order gets to you on-time, for less.
Shipping PolicyEasy Returns
Returning items is as simple as 1-2-3
Ordered the wrong product? Item damaged in transit? Our 3-step process makes returning products easy – even up to a year after purchase – with no restocking fees on returns made within 90 days.
Return Policy