B-3 - 58,000 BTU Output Oil Boiler w/ Riello Burner Zoom

B-3 - 58,000 BTU Output Oil Boiler w/ Riello Burner


Brand: Biasi

Qty Price
/ each
Non-Stock ItemAllow 5-7 Days to Ship Out



Fuel Type: Oil
System Type: Hydronic (Water)
Depth (Inches): 15-1/2"
IBR Rating:
DOE Rating:
Vent Type: Type B Vent (Chimney)
Width (Inches): 18-3/4"
Height (Inches): 29.75
Vent Size: 6"
Water Connection: 3/4"

Description for Biasi B-3

Note: Product Title reflects this boiler's IBR Net Output Rating

The B-10 boiler systems have been heating residential and commercial buildings throughout the world for years. It has proven its fuel efficiency and durability in countries where fuel can cost up to four times as much as in the U.S. The same fuel saving technology is now available here in North America. With the three pass boiler design and low water content, heat is quickly supplied for your heating zones and hot water needs. Combined with an outdoor reset control, you can achieve a fuel savings of up to 40% over conventional single pass boilers. You will also have peace of mind since the B-10 boiler package complies with ASME and UL standards and is IBR rated. The B-10 boiler system is the cost-competitive heat and hot water system of choice.

  • Comes with F-3 Riello Burner
  • Heating Capacity : 67,000 BTU
  • Gross Input Burner Capacity : .55 GPH, 80 MBH
  • Net Output : 58 MBH
  • AFUE Efficiency : 86.6%
  • Water Content : 3.7 Gals.
  • Length (L) : 15.5 inches

PLEASE NOTE: The product weighs 247 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.

B-3 - 58,000 BTU Output Oil Boiler w/ Riello Burner

Q&A: Ask the Questions, share answers

Do you have questions about this product?

get answers from real customers and in-house experts with AnswerBox.

2 Questions | 2 Answers
Displaying questions 1-2
  • B-3 - 58,000 BTU Output Oil Boiler w/ Riello Burner


    A question out of curiosity. Your website says that Input heat is 80,000 BTU and output heat is 58,000 BTU. When I divide these numbers I get 58,000 / 80,000 = 72.5%. This should be the effriciency. Why do you say it is 86.7% efficient ?

    Thank you, Pavel
    Asked on 8/29/2012 by Pavel from Long Island, NY

    1 answer



      AFUE efficiency ratings (86.7% for this boiler) use DOE output ratings and an input below the maximum. This boiler has a DOE output rating of 67,000 BTUs. DOE ratings assume that a boiler is installed in a heated space and that any heat that comes off the boiler jacket and surrounding piping goes toward satisfying the heating load. The 58,000 I=B=R rating assumes that this heat is wasted. The AFUE efficiency rating uses The DOE rating and an output of approximately 77,300 BTUs (slightly below the 80,000 maximum) in order to achieve the 86.7% number.

      Answered on 8/29/2012 by PexSupply Staff from NY
  • B-3 - 58,000 BTU Output Oil Boiler w/ Riello Burner


    do i need a water tank
    Asked on 3/17/2011 by ben from griswold ct

    1 answer



      This unit cannot produce hot water without the use of an indirect water heater. It does require an expansion tank.

      Answered on 3/18/2011 by PexSupply Staff from NY
Displaying questions 1-2

Do you have a question about this product?