Change the heat exchanger if it is still warranted. All you will pay is labor and maybe shipping. But if you cannot find a tech who wants to do a little labor and only wants to sell new or if you want to spend extra money then get new. The new one will be shinny.:thumbup:
Wait in this economy you should spend spend spend. So buy new new new.:laughing:
It sickens me that HVAC professionals would flatly say replace an 11 year old furnace.:shutup:
Even janicrap should last 20 years.
You should look at other parts also venter motor blower motor etc to see if they are original or replacements.
I charge on average $400 to replace a heat exchanger plus parts. If the exchanger is under warranty the cost of shipping can be $50 to $100, if it is a Heil then I don't get charged shipping. So the total cost to ho is around $500 to $600 the cost of a new unit $2000 to $3500. I cannot think of any improvements in the last 11 years worth $1500 to $1900.Hi Guy!
The reason most HVAC guys would suggest replacing the furnace is because the amount of money to change out HT EX is a considerable portion of a new one. And in 11 years there has been so many more benefits added and improve made to current models it just makes good economic sense.
If more of us considered the HO and informed them of their options our rep. would be much better as a trade. Tomorrow I am rring an old Heil 90 I put it in 22 years ago I will replace it with a new Heil H9MPD050 I would prefer the H9MPT050 (two stage) but the HO chose (after much educating) the single stage he whanted an N series (Builder model) but I was able to upsell.10-4 Doc!!! This may not be a good thing, but I like your style.
I don't think things have changed drastically since furnaces made in the mid 90's. Everything is case by case. Sometimes it is beneficial to just replace the furnace and start afresh. Sometimes, replacing just the h.e. is justified. The key is giving the h.o. the options and letting them decide.
I charge on average $400 to replace a heat exchanger plus parts. If the exchanger is under warranty the cost of shipping can be $50 to $100, if it is a Heil then I don't get charged shipping. So the total cost to ho is around $500 to $600 the cost of a new unit $2000 to $3500. I cannot think of any improvements in the last 11 years worth $1500 to $1900.
Its not like the old days when changing a heat exchanger could take 5 or 6 Hours. I have changed primary and secondary in less then 2 hours.
I think the real issue is do most techs know how to do it.
Do we sell the customer life time warranties that we have no intention of honer ring?
yes I did post that on diy and stand buy it. I should edit that to say I have not found a case using na gas on a retroMisread your post. My bad.
So I guess you didn't post this in DIY?
Once you have subtracted these non heating fuel costs you simply take 15% if that is the efficiency difference and wella you approximate savings.
I have not found a case where the payback in my area warrants the 90 over the 80
Bare in mind we need to consider interest you will pay on financing or interest lost by withdrawing savings.
Consider how long you expect to stay in your home
I am not sure what the contradiction in the earlier post. I have never said that an 80 is always the best choiceand this one
Originally Posted by beenthere
If your getting a 90% plus, make sure they pipe it up as a direct vent.
If its properly sized, its worth the savings.
Unless you own stock in the gas company.
I was asking been if it really made that big of a difference to use two pipe (direct vent ) verses single pipe. he answered and he made the point that it would be 2% or more on the fuel bill (not the gas bill) this does not contradict my statment that a 90 is not always the best (economic) choice.
Dr. Heat Quote:
If you have combustion air in the mechanical room does a two pipe really increase efficiency by that much