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Weil-McLain
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Weil-McLain Ultra Series Boilers
Weil-McLain Ultra Series Boilers
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Net I=B=R Capacity (BTU)
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Net I=B=R Capacity (BTU)
I=B=R, also referred to as Net Output or AHRI Capacity, is the rated heat output of a boiler after accounting for combustion efficiency, piping loss, and an extra pickup factor. We recommend sizing steam boilers based on the I=B=R rating.
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60000 - 79999 (2)
80000 - 99999 (1)
120000 - 139999 (1)
180000 - 199999 (1)
220000 - 239999 (2)
300000 - 319999 (1)
DOE Heating Capacity (BTU)
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DOE Heating Capacity (BTU)
Also referred to as Gross Output, this is the output of a boiler after accounting for combustion efficiency. We recommend sizing hot water boilers based on the DOE Heating Capacity.
To
70000 - 89999 (2)
90000 - 109999 (1)
130000 - 149999 (1)
190000 - 209999 (1)
270000 - 289999 (2)
350000 - 369999 (1)
Maximum Input Capacity (BTU)
×
Maximum Input Capacity (BTU)
The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.
80000 - 99999 (2)
100000 - 119999 (1)
140000 - 159999 (1)
220000 - 239999 (1)
280000 - 299999 (2)
380000 - 399999 (1)
AFUE (%)
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AFUE (%)
AFUE (Annual Fuel Utilization Efficiency) measures the efficiency of combustion equipment over the entire heating season, and is calculated by dividing the amount of energy that is actually heating your home by the total energy contained in the fuel used by the boiler/furnace.
Learn More
91 (1)
92 (2)
93 (2)
94 (3)
Fuel Type
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Fuel Type
To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
Liquid Propane (1)
Natural Gas (7)
Product Height (Inches)
43 (5)
47 (3)
Product Depth (Inches)
19 (5)
22 (3)
Minimum Input Capacity (BTU)
10000 - 19999 (2)
20000 - 29999 (1)
30000 - 39999 (1)
40000 - 49999 (1)
60000 - 69999 (2)
80000 - 89999 (1)
Flue Connection Size (Inches)
2 (3)
3 (2)
4 (3)
Compare
Weil-McLain Ultra 155 - 139K BTU - 94% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383500735
Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 155K BTU Gross Input, 139K BTU DOE Capacity, 123K BTU Net IBR Capacity. Includes Circulator.
31% Buy This
(2)
$3,299.00
Only 5 In-Stock
Free Shipping & Lift Gate
×
Free Shipping & Lift Gate
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Weil-McLain Ultra 399 - 364 BTU - 91.7% Thermal Efficiency - Hot Water Gas Boiler - Direct Vent
Model: 383500738
Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 399K BTU Gross Input, 365K BTU DOE Capacity, 317K BTU Net IBR Capacity. Includes Circulator.
23% Buy This
(2)
$7,309.00
Factory-Direct
Free Shipping & Lift Gate
×
Free Shipping & Lift Gate
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Weil-McLain Ultra 230 - 207K BTU - 94.1% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383500736
Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 230K BTU Gross Input, 207K BTU DOE Capacity, 183K BTU Net IBR Capacity. Includes Circulator.
15% Buy This
(2)
$4,199.00
Only 2 In-Stock
Free Shipping & Lift Gate
×
Free Shipping & Lift Gate
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Weil-McLain Ultra 80 - 71K BTU - 93.5% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383500732
Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 80K BTU Gross Input, 71K BTU DOE Capacity, 62K BTU Net IBR Capacity. Includes Circulator.
8% Buy This
(2)
$2,759.00
Factory-Direct
Free Shipping & Lift Gate
×
Free Shipping & Lift Gate
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Weil-McLain Ultra 80 - 71K BTU - 93.5% AFUE - Hot Water Propane Boiler - Direct Vent
Model: 383500733
Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 80K BTU Gross Input, 71K BTU DOE Capacity, 62K BTU Net IBR Capacity. Includes Circulator.
8% Buy This
(2)
$2,759.00
Factory-Direct
Free Shipping & Lift Gate
×
Free Shipping & Lift Gate
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Weil-McLain Ultra 105 - 94K BTU - 94% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383500734
Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 105K BTU Gross Input, 94K BTU DOE Capacity, 81K BTU Net IBR Capacity. Includes Circulator.
8% Buy This
(2)
$2,889.00
Only 3 In-Stock
Free Shipping & Lift Gate
×
Free Shipping & Lift Gate
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Weil-McLain Ultra 299 - 270 BTU - 92.5% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383500737
Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 299K BTU Gross Input, 270K BTU DOE Capacity, 234K BTU Net IBR Capacity. Includes Circulator.
8% Buy This
(2)
$5,799.00
Factory-Direct
Free Shipping & Lift Gate
×
Free Shipping & Lift Gate
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Weil-McLain Ultra 299 CT - 270K BTU - 92.5% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383500725
Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 299K BTU Gross Input, 270K BTU DOE Capacity, 234K BTU Net IBR Capacity. Includes Circulator.
(5)
Q&A
(1)
$7,509.00
Factory-Direct
Free Shipping & Lift Gate
×
Free Shipping & Lift Gate
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
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