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  1. #1
    Join Date
    Aug 2008
    Posts
    35

    Default Slant Fin Boiler Good or Bad?

    I'm looking to replace my 30+ year old boiler with a Slant Fin Bobcat 120. A 1,500 sq ft home with less than 100 ft of baseboard. I was advised I need at least an 60,000 BTU unit. Anyone have experience with this boiler. I read a lot of good about it but I'd like to hear from someone who has used or installed one.
    Last edited by rwhnze; 10-11-2008 at 05:52 PM.

  2. #2
    Join Date
    Oct 2008
    Posts
    6

    Smile Re: Slant Fin Boiler Good or Bad?

    ok , first of all SlantFin is a good Amarican , US built company and back their products.
    Now for the problem. I installed a bobcat 120 in june 08. It was constantly failing with code A01
    I had to reset it. SlantFin replaced the electronics and then I had what can be described as "delayed Ignition" A loud band between ignition failures. The new control board did not require a reset because it was now auto reset. SlantFin then sent an engineer to my house. They recommended the exhaust be redesigned from a combo to individual plastic pipes.. two days later more delayed ignite issues.

    Today the first day of heating, the fan that increases the gas flame temp started to sound like a fan rubbing on something with a clicking noise. So now I will be calling Monday to inform them of the new issue.
    Now donít misunderstand me. They have been very responsive. I have friends who have purchased WeilMclane, Burnam and others . All feel they made a mistake and even though I have some issues they are considering replacing with a SLantFin. The Bobcat is a very nice boiler and Iím sure will be a real money saver when I get it corrected. I have a affinity for problems. I asked for other slantfin customers and received a list from a distributor( SlantFin did not know about this ) and could not find anyone else who had issues so I guess I would recommend buying the Bobcat

    I have the same size house as you.

    2011 edit updateThis is a follow-up to the Bobcat I installed in 2008. I initially had some issues but they apparently all related to the igniter design. Slantfin engineers replaced the original design with one that allows the spark to as other suggested ďnot jump aroundĒ it has a much shorter length. Anyway the problems are non existent now and the boiler runs perfect ( hope I donít jinx it). The Oil boiler I had used about 1000 gallons of oil a year. Ran during the summer for hot water. The cost was about $3100 in 2008. The Bobcat cost about $7500 to install complete with all new . The cost to run the Bobcat for hot water runs about $35 for a family of 4 a month. Heating runs about $180 during the winter keeping the thermostat at 70 during the day and 66 at night. So all in all I would say it was a good investment.

    .
    Last edited by tsac00; 10-02-2011 at 07:04 PM. Reason: update 2011

  3. #3
    Join Date
    Oct 2008
    Posts
    2

    Default Re: Slant Fin Boiler Good or Bad?

    tsac00,

    I was wondering if you wouldn't mind sharing your total cost for installation of the B-120. I've been shopping around for a condensing boiler to replace our 25yr old oil boiler, and the Bobcat is near the top of our list.

    I'm hoping the problems you had were just a fluke, as I've also read many good things about the product. Did you also install an external storage tank? I know the unit holds 1 gallon, but I wasn't sure if that was enough to get instant dhw, or if you needed a secondary tank. Thanks for any info.

  4. #4
    Join Date
    Aug 2008
    Posts
    35

    Default Re: Slant Fin Boiler Good or Bad?

    I have had mine in operation for a week and there have been no issues. Knock on wood. I do not use a DHW tank with the unit. The only change I made was the compensation slope from the default 1.0 to 2.0. I thought the water was not hot enough with an outside temp of 46. I have the PVC vent and intake both running 36' up my chimney.

  5. #5
    Join Date
    Dec 2008
    Posts
    4

    Smile Re: Slant Fin Boiler Good or Bad?

    I installed a Field Test model of the Bobcat about a couple of years ago before they came on the market. I too had the "A-1" ignition problem and an off reading with the outdoor sensor. Don't forget this was a test model. I got a new control module which took care of the sensor problem. There was also an ignitor problem which I think they have taken care of. My boiler has been running fine since then. Also have taken about 30% off my heating bill from the 20 year old boiler I had. I will be installing an indirect water tank when my gas water heater goes. That should also add some gas bill savings.

    Just a note, If you go with an indirect, use the slant fin indirect, or a super store, and make sure you get the "sensor" for temperature control, not an aquastat control. Make sure you use a Taco 0011 pump for the indirect and use one inch piping.

    I have used Slant Fin products since they bought out National Boilers. I'm talking since the 70's. Rarely ever had a problem. The best part is when I did have a problem, they were very responsive.

    The best way to rate a company is to see how they respond to the worst scenerio. In this light Slant Fin Shines.

  6. #6
    Join Date
    Dec 2008
    Posts
    2

    Default Re: Slant Fin Boiler Good or Bad?

    On October 27,2008 I converted from a Weil Mclain **** Series oil boiler to a natural gas Slant Fin BOBCAT 120. My home is 1980 square feet colonial. Much like the others i too had a situation with this system. That dreaded A 01 error left me in the cold. I did however call Slant Fin and they immediately resolved the situation sending me a updated ignitor(very easy to replace i didso myself). So far it is working better than what i expected . i would recommend the BOBCAT 120 to anyone looking for a new boiler. it is now fully functional with no errors to report. Im free to answer any questions regarding this system.

  7. #7
    Join Date
    Feb 2014
    Posts
    2

    Default Re: Slant Fin Boiler Good or Bad?

    [QUOTE=tsac00;38916]ok , first of all SlantFin is a good Amarican , US built company and back their products.
    Now for the problem. I installed a bobcat 120 in june 08. It was constantly failing with code A01
    I had to reset it. SlantFin replaced the electronics and then I had what can be described as "delayed Ignition" A loud band between ignition failures. The new control board did not require a reset because it was now auto reset. SlantFin then sent an engineer to my house. They recommended the exhaust be redesigned from a combo to individual plastic pipes.. two days later more delayed ignite issues.

    Today the first day of heating, the fan that increases the gas flame temp started to sound like a fan rubbing on something with a clicking noise. So now I will be calling Monday to inform them of the new issue.
    Now donít misunderstand me. They have been very responsive. I have friends who have purchased WeilMclane, Burnam and others . All feel they made a mistake and even though I have some issues they are considering replacing with a SLantFin. The Bobcat is a very nice boiler and Iím sure will be a real money saver when I get it corrected. I have a affinity for problems. I asked for other slantfin customers and received a list from a distributor( SlantFin did not know about this ) and could not find anyone else who had issues so I guess I would recommend buying the Bobcat

    I have the same size house as you.

    2011 edit updateThis is a follow-up to the Bobcat I installed in 2008. I initially had some issues but they apparently all related to the igniter design. Slantfin engineers replaced the original design with one that allows the spark to as other suggested ďnot jump aroundĒ it has a much shorter length. Anyway the problems are non existent now and the boiler runs perfect ( hope I donít jinx it). The Oil boiler I had used about 1000 gallons of oil a year. Ran during the summer for hot water. The cost was about $3100 in 2008. The Bobcat cost about $7500 to install complete with all new . The cost to run the Bobcat for hot water runs about $35 for a family of 4 a month. Heating runs about $180 during the winter keeping the thermostat at 70 during the day and 66 at night. So all in all I would say it was a good investment.

    Could you please let me know if a Slant-Fin Bobcat is a good choice for a gas boiler? Does anyone know if there is a bobcat that is available for a 100,000 btu. I was interested originally in the Weil McLain CGI-4 but so many bad reviews on Weil McLain. Confused...do not know which way to go....please help...thanks...iannilin

  8. #8
    Join Date
    Dec 2009
    Posts
    1

    Default Re: Slant Fin Boiler Good or Bad?

    I installed a Slant Fin Bobcat B120 Boiler in Sept. of 2008. I had numerous start problems, all giving me the A01 code. (ignition failure) I would have to manually reset the boiler almost all of the time. Finally, received a new style igniter, and the new controller. This seem to solve the problem.
    I started the boiler on 21 Oct. 2009 and began to notice that the boiler was going thru multiple start attempts before finally starting. Until this morning (2 Dec. 2009 Wed.) the boiler always started. This morning I had a hard lockout A01. Manual reset was able to finally start the boiler. It went thru 5 tries after the manual reset. I get a strong spark, and a good light off, and the gas valve closes, and the start is aborted. Spoke with Slant Fin, Bob in Tech Support, and he asked if I was using propane. I am, and he asked me to look at the controller and see if PROPANE was marked on the top of it. It was not. They are sending me a new controller,and a new igniter tomorrow. They think that the problem is the characteristics of Propane. I now have to use the reset button a number of times. It took 15 tries to light the last time
    (12-10-2009)
    I have installed the new controller and a new igniter and a new ignition harness, and so far, the boiler lights on the very first try. The controller was programed for propane. The plumber also raised the propane pressure at the regulating vale. With all propane appliances running (Hot Water and Boiler) the inlet pressure is 9.6 Slant Finn states that 9.5 or higher is best.
    Last edited by n35tr; 12-10-2009 at 08:34 AM. Reason: Update

  9. #9
    Join Date
    Dec 2008
    Posts
    4

    Default Re: Slant Fin Boiler Good or Bad?

    I think you will find that the problem with the Bobcat was a very simple one. It was the ignitor itself. The igniter consists of two rods. One shaped like a capital "L". That one is fine. The other one ends up less than an 1/8 of an inch away from the "L" shaped one. The end of that electrode is cut off flat. I changed a half dozen of these, and a couple of controls. The new ignitors are exactly the same except they cut the second electrode to a point which concentrates the ignition spark. Since I installed it, NO MORE PROBLEMS! Get the right ignitor and you got it.

  10. #10
    Join Date
    Jun 2010
    Posts
    93

    Default Alum Heat Exchanger

    Alum heat exchangers are good for heat transfer but it ends there. Weil, Buderus taught alum hx's. Weil started including what I call magic potion with the boilers. It basically coats the inside of the hx to help slow down the corrosion process. Buderus has also seen leakers. Burnham is no longer offering the Freedom which has an alum hx.

    I would take a look at the Viessmann Vitodens 100. www.viessmann-us.com. Its a simple no thrills condensing boiler that will provide 95%AFUE with a limted lifetime warranty on the hx. 10 years full and then 90% after year 11. It's basically the same warranty as a traditional cast iron boiler.

    Its a great boiler for fin tube jobs. That 60K sounds a little high for a 1,500 sqft house. I would ask for a heat loss be done of the home. Heat emitter measurement is also necessary to be match to the loss so you can set a heating curve.

    Sold hundreds of Vitodens in the past couple of years. Avg fuel savings is 35-50% if properly installed and set up.

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