[Fischer_76_911S]

[/QUOTE]Bob:

What would you charge for complete install of two systems, one 3 ton, the other 3.5 ton, with 50KBTU natural gas heaters? Assume the copper line sets do not need to be replaced. Do add in the thermostat upgrades needed.[/QUOTE]


Quotes vary so much from job to job it's impossible to quote over the phone/keyboard. I flush the copper lines and use a whole tank of Nitrogen purging the system. Unless the lines are short and readily accessible there is really no need to replace them unless they are sized incorrectly.


As far as the comment about ductwork - There is no such thing as sizing for variable speed systems. You size for airflow and constant static pressure. I have designed hundreds of jobs for TVA and Georgia Power as well as hundreds more for "cash" customers. That is how I started in this biz. Variable speed systems generally operate at lower static pressures and will actually push many times harder than a standard system if needed. They usually correct for duct design flaws and the low speed continuous fan settings do wonders for keeping the air moving throughout the house and keeping it filtered while adding roughly a few dollars per month to your power bill.

As far as replacing the system before I sell - it will be 7 years before I sell. Hard to sell a house with a 24 year old system even if it is running perfect, especially when I am in the field. I get the enjoyment, comfort and power savings for 7 years (when I sell) and it will still be under warranty and the low power bills will be a selling bonus. I have over 3400 square feet, a bonus room with 19 windows and two doors (in that 3400 figure) + I am cooling a 28x34 garage with a 42 SEER Carrier ductless mini-split. We are a family of 4 with the washer and dryer always going. My rates are 10 cents per kW/h and my last bill was $95 before all the taxes and "fees" were added. It is so low I wouldn't believe it myself.

My opinion only.
Bob