How many 4" takeoffs?

What was the temp rise after you fired up?

There were 8 or 9, 4in conversions I did not count them, them temp rise seemed normal by feel, I did not check it. But I felt it was about right. In My years in the HVAC business I have never seen a cobbled setup that worked well, this one seemed to

1/2 the CFM the unit requires

Normal? What is normal?

Please start reading and equipping yourself with the proper tools and following installation guidelines. Temperature rise is published in the I &O manual and on the unit rating plate for a reason. I guess you donÂt set proper blower speeds ever do you?

With what you describe, I am sure the unit is firing up to and cycling on the limit. Which means overtime the unit has stressed the heat exchanger immensely. Did you check the heat exchanger for failure, or close to it?

You were the last "professional" to touch this improper install and thus are liable and most often found to be responsible should an injury or death occur.

Not to be the hard guy on this but without recommendations to correct with supporting documentation and a sign off of refusal to repair by homeowner, along with shutting system off and reporting to local authorities which may be the gas company, you are the one that will be sought after in both possibly criminal and civil actions should this bad install hurt someone.

zl700, you are probably not aware of this but iggie, the person you are giving so much of what you probably feel is valuable advice, is actually a highly respected contractor who happens to be retired and spends his time overseeing the operation of a highly successful HVAC business he has handed over to his family and also contributes a wealth of information to people in this forum. I personally have a lot of respect for iggie. I appreciate his wisdom as well as his wit and it would piss me off to no end if people like him quite logging into this forum because of unknowing donkeys like you! I believe you own this man an apology and perhaps get to know some of the regular contributors here. And maybe if you quit acting like an ass he just might decide to pass on to you some valuable information. Hey iggie, nice to see you back, I was wondering where ya been.

I, one have never seen an Iggie post so, what can I say.

With regards to my advice nothing that hasn't been said by a manufacturer, HVAC training school or in the installation manual.

When I wrote my response by the way it was at no time derogatory, just suggesting proper practices. With the info provided, should the homeowner become sick soon from a furnace problem, you are aware of the common precedent in the industry, last man to touch, no correction suggested or made. Because he is old and an old timer and put in grandpas furnace doesnÂt mean he is allowed a free pass to not perform a proper check.
A lawyer would have a field day.

With regards to his lack of concerns in my eyes as written by him on the oversized furnace and without properly checking it out (at least according to his post) as a former HVAC dist exec & manufacturers rep, I have given too many testimonies and dispositions regarding faulty installs and negligent service on behalf of customers or homeowners.

Also being a past first responder, I had the opportunity to carry a few out of situations such as this, one with a sheet over their head.

I think most reading back would agree that my post showed concern for lack of tech skills and would have been said by someone else unknowing who Iggie was. At no time did I act like an ass and you are showing your immaturity Mr HVAC and probable stupidity with such an abrasive response. Your helpful contributions are often just that then again at times I think you enjoy the games.

Mr Iggie, I meant no harm only concern for what most would read as an inexperienced tech that doesnÂt have the tools or knowledge to check and correct a probable dangerous situation.

Z700 we have plenty of the proper test equipment, however we had nothing to do with the installation, I simply replaced a bad exhaust vent fan. As to the temp rise I have been doing hvac work for over 60 years and can tell when a furnace heats normal. The work by whoever did installation seemed to be ok, though I did not check beyond making sure furnace was operating properly and not producing any carbon monoxide, the combustion was perfect, After thinking about the installation I think it works as well as it does because a 5 ton blower was used where a 4 ton is normaly used, the GUPS 120 calls for a 4 ton. The 5 ton evidently provides the etra boost needed for the large vents. The setup has been in use for almost 15 years with no problems, plus it was passed by the local hvac inspector and the gas company. I thank Z for his concern, frankly I would not allow my company to do a job like this. However, I must say work appeared well done and it works heats and cools the house to homeowners satisfaction. Don,t anyone be to hard on Z my skin is thick and I have heard it all before. Iggie

Thanks Iggie, pleasure to meet you

Sounds like an unintentional high pressure system.

I mentioned the gas officials and inspectors but, don't hold too many in high regard. Their kinda like a home inspector giving a heating appliance evaluation in their report, can only say it worked.

Z I am also happy to meet you, I agree the installer on this deal simply lucked out. My son who is now head honchoo was intrigued by the system and along with son a mechanical engineer thoroughly checked it out. They think it was simply a chance thing that the right combinations happened and the system works well, the found every thing in order. I no longer5 work on a regular basis, I simply made this call to help ease a big backlog, you know how things are the first cold spell. The lady of the house called no heat, kids you know the drill. I still hang around the office out of habit, it,s hard to quit something one has been doing 60 years, plus fixing something once in awhile make an 83 year old feel needed and worthwhile I again want to express my admiration and respect for the knowledge of those who regularly take the time to post here. Keep it up fellows Iggie