How to Hire a Quality HVAC Contractor
Installing a new HVAC system can be very expensive, so it is essential for consumers to make sure they are getting the best value for their dollar. Cheaper is only sometimes better, and sometimes the more expensive bid offers a better value per dollar based on the services provided. Here is an in-depth checklist that will help you compare contractors to ensure you get a “quality installation” in compliance with ACCA.
Performing a Heating and Cooling Load Calculation
To install the right size unit, contractors need to know
the home’s heating and cooling requirements, contributing factors are the size of the home, type of windows, insulation amounts, direction the house faces, etc. McDowell & Son uses specialized software to get the most accurate results. Too many contractors incorrectly size the equipment based on only the home’s square footage. Also, basing replacement equipment on the size of the original system could lead to problems since the original equipment size may have been incorrect.
Manufacturers Performance Data and Third Party Certification
The load calculation (from item 1) guides proper equipment selection. A too-big (oversized) unit may have a higher upfront cost, raise utility costs, remove less humidity, and fail more quickly. On the other hand, a unit sized too small will not be sufficient to heat and cool your home. Third-party certification (AHRI Certification), of the equipment being installed. If the contractor correctly matches the equipment, it will deliver the promised high-efficiency performance.
Inspect duct system (Does not apply to mini-splits)
Leaky ducts can cause health problems and waste energy. Also, if the ducts are too small, they will cause the HVAC system to use more energy and/or deliver less comfort. Small ducts may also lead to early equipment failure.
Evacuation & Refrigerant Charge
Incorrect refrigerant levels can lower efficiency by 5 to 20 percent and cause premature component failure, resulting in costly repairs. With an ENERGY STAR Quality Installation, your contractor will verify that the refrigerant level in the system is correct. Before charging a new system, the proper installation process requires a complete purge and cleaning of the refrigerant lines (whether or not they are new) and a full evacuation of non-condensable (anything except pure refrigerant). When brazing the new connections, nitrogen should also be used to prevent carbon/soot from forming inside the lines.
Optimizing Airflow
You may face comfort issues and increased utility costs if the airflow in your heating and cooling system is too high or too low. With a quality installation, your contractor will evaluate the airflow and make any necessary modifications for the best performance. Selecting energy-efficient goods when buying heating and cooling equipment is a good idea.