A bigger system isn’t always better; a contractor should size the heating and cooling system based on the size of your house, level of insulation, and windows.
The correct information that a quality HVAC contractor will need to collect to help determine the proper size of the equipment needed for your house would relate to the number of windows in the house, the direction in which they face, the state of insulation of the house etc.
These would enable him to accurately calculate the load, to determine suitable heating/cooling equipment needed for installation.
Beware of any contractor who uses the “rule of the thumb” method for calculations or relies on the specifications of the earlier installed equipment for submitting an estimate.
A quality contractor will not offer price as the only consideration. While it is a major factor, there often are valid reasons for price differences. Consider the efficiency and warranty as a part of the price consideration.
HVACR stands for heating, ventilating and air conditioning/ refrigeration (HVACR). Sometimes you see it listed as HVAC heating, ventilating and air conditioning.
The 1-800 number was created and used when the association originally was formed. It was believed that it was (still is) a number that is easy to remember. 1-800-395-WARM (9276).