Just got a bid from Home Depot’s rep for Trane for a new HVAC system for my 2200 sq ft home. Existing system is a Payne, 100,000btu furnace, with a 4 ton blower and 3.5 ton coil and condenser. All ductwork is plastic flex, installed in the basement and attic, with the exception of the transitions and branches, and the chase going from the basement to the second floor. The basement and attic are unconditioned spaces. There is a 14’inch line for the return; there is only 1 14x30 return at the base of the stairs to the second floor. After the tech from the company Home Depot uses looked at the system, he came up with this recommendation
Replace all plastic flex with metal flex and install dampers for balancing 6 ducts downstairs. No additions or changes, all duct is out in the open and accessible.
Resize return to 16 inch and vent to 20x30.
Add one supply vent to bonus room next to unfinished basement. Two walls fully exposed on basement side, save for insulation.
Second floor, replace all exposed plastic flex duct in attic with flex metal, add one supply vent to loft area fed off existing trunk in attic, all work areas exposed and accessible. Four existing vents, will be five when finished.He didn't have an answer to the undersized supply problem to the second floor
Equipment to be:
1 80% 2 stage variable speed nat gas furnace
2 14 SEER condenser and coil
3 1 electronic air cleaner
4 1 new line set
Now here’s the good part:
For his “better” system, consisting of all Goodman equipment he wants $way too much
For his “best” system he wants $even more way too much
Now, he made all decisions with a lot of coaching from me, asking about how we improve the airflow and all.
After I review his bid, I ask him if somebody is going to come out and do a Manual J and Manual D before we order equipment.
He got this “deer caught in the headlights” look and asked me “What’s a Manual J?
I told him that a Manual J is the calculation of proper equipment size based on construction and load, and that Manual D was the calculation of correct duct sizing. He goes, “Well, I can do a heat load, I have the sheet here somewhere.”
He looked thru his papers and couldn’t find it.
So then he says that he will match any price on a like install, and I pull out the bid for the exact same thing he is quoting and its half of his Trane bid A bid I thought was a bit much, seeing as I also have a bid for replacing like for like with new Carrier equipment at 80% and 12 SEER for a third of that. Now the one third price is less than Home Depot wants for the Goodman Furnace alone without any labor.
So if you want a real laugh, go to the Home Depot web site and see what they and Trane have to say about how they will evaluate your house and all. Then call them for the real thing. If my experience is any indication, they will not resemble each other at all.
Now, I am not looking for the cheapest bid, I just want a good system that will last. I know the old install is crap, and needs work. The major problem is airflow to the second floor loft, and subsequent stratification. I have given everybody who looked at it the same info, and told them the same thing, that is, let me know what its going to take to fix this, I am open to anything. The answers I am getting are all over the place, I was hoping that Home Depot’s contracted installer would do what the ads and Trane say they would do, that is, evaluate my situation and give me a solution.