New heating and cooling system

Question

I am in need of a new heating and cooling system for my home. I need to know what to ask the contractor that is coming today so i get the best value. What questions do I need to ask the contractor about the unit. How do I know that it is big enough for my home when the last one didn't seem to cool/heat enough.

Answer 1

The size equipment needed for your home should be determined by a Manual J heat loss/load calculation. NEVER use "x amount of square feet per ton" sizing.  If your contractor can't supply a Manual J calculation, move on to the next one.

Brands don't matter much. Most manufacturers have excellent warranties now. Your biggest concern should be the contractor. Get references and call them. Check the BBB for complaints.  

Answer 2

you know what size heater and cooler U now have,,its tagged on the sides of the units. So order a larger one of each. Its not thier decision what you install in your home,,,its yours.

It is also your decision what brands of units you want. So meet with the contractor and write everything down on paper and tell him you will get bak to him. Do not let anyone get you to sign a contract on the first meeting,,,,ever,,,,,for anything. you need time to decide and also to meet other contractors. ( that is your little ''secret'')

Answer 3

A tip on size 400-500 sf per ton of A/C, returns sized around 150sq in per ton, the better the seer the more energy savings. Attic insulation do you have enough. Does the duct work leak? The line set is it the right size for the equipment? You want a programmable thermostat!

Will they install a factory hard start kit on condenser?Will they use a micron gauge with the vacuum pump to make sure no leaks and all water and air out of lines. Will they adjust freon charge once house is at proper temp not 90 degrees! Will they install drain line switch? how many returns in the home, hot and cold rooms can I add more returns to solve rooms that are to hot or cold? You want a air handler with a ECM motor to save energy. If air handler is in unair conditioned space will they seal the high voltage lines and tape all seams in cabinet to stop air loss? Is the return air sealed not pulling air from between walls?What is the condition of the old evap coil? What temp is the liquid line now 85-90 is normal and what temp is the liquid line after new equipment is installed? Will you check circuit breakers to make sure that they are ok and will not damage the new equipment? Hope this helps!