Replacing an HVAC System – What to Expect? – Modernize

HVAC Replacement Preparations

If youre considering HVAC replacement, chances are that this is your first time facing such a project and youre not quite sure what to expect. Thats why weve come up with all the helpful information youll need, from working with an HVAC contractor and installer to tips that will help you prepare your home before the HVAC replacement project begins.

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Before you start the replacement, its recommended that you get up to four HVAC replacement installation cost estimates from reputable HVAC contractors or companies. Upon arriving at your property, the HVAC contractor will measure square footage and perform load calculations based on your areas climate, the size of your property and condition of the structures envelope, or its ability to contain conditioned air. After completing the assessment, the contractor will recommend the size and type of HVAC system, as well as any necessary repairs to your current ductwork and/or exterior envelope. The recommended AC installation may include upgrading attic or crawl space insulation, resealing of windows and doors, or repairing breaches in exterior walls where conditioned air might escape. Your HVAC installation contractor may recommend the best air conditioner for your home based on tops brands, your budget, and the energy efficiency rating you are hoping to find in a new AC unit.

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It is recommended when replacing one part of the system, whether the HVAC compressor or the air handler, to update both systems and, at a minimum, have the ductwork inspected in case it needs replacing. Although only one part of your system may need replacing, its recommended that you replace the entire system to maintain maximum system efficiency. Replacing the entire HVAC system means spending more money upfront but youll save money in the long run because your entire HVAC unit will be in sync.

The following chart is an estimation for tonnage coverage based on the square footage of your property. Youll also want to take into consideration the climate where your property is located to ensure you have appropriate tonnage to handle the varying temperatures in your area. A qualified HVAC contractor will be able to figure this out for you more accurately, bu here is a helpful chart so you can know what to expect:

Before buying for HVAC replacement, do your research on the best type and size unitfor your property. Purchasing a unit that is too large or too small for the square footage of your home or business is not energy efficient, which results in higher utility bills. Check the energy efficiency ratings on the label and whether the product is certified by Energy Star to ensure you buy the system that will work at maximum efficiency, year-round, and save you money throughout the lifespan of the system.

Youll want to know these terms before deciding on the best replacement HVAC unit for your home.

* Keep in mind when shopping for a new HVAC, while units with a higher HSPF and SEER rating than the current standard will cost more, you will have a better return youll have on your investment over time

There are several things you can do before the installation crew arrives that can speed up the process. Move valuables such as antiques and irreplaceable objects to a safe location. Many contractors are uncomfortable when asked to move expensive items from work areas, as they do not want to be liable in the case of an accident. In addition, if you have pets, move them to a safe, quiet location away from expected work areas.

Now that the estimate is complete and you have chosen an HVAC contractor and new system based on their recommendations, youre ready to move forward with the installation. While most HVAC system replacements can be completed within a day, some more advanced additions could extend the installation into the next day. Upon arriving at your property, the HVAC contractor and crewusually one or two assistantswill assess the job site and begin setting up their work areas.

First, the crew will protect all flooring in applicable work areas by laying drop cloths and/or protective paper. Next, they should move furniture and other household belongings near the work areas to a safe location and out of the way. Because there may be some dust created during the installation, heavy furniture and other household items that cannot be moved should be covered with plastic for protection. After ensuring all flooring and household items are protected, the crew will bring in their tools and begin the project.

Before replacing your new HVAC system, the crew must first replace the old equipment with your new air conditioner and heating unit. This may involve gaining access to attic areas, crawl spaces, and basements that typically house the HVAC system. After cutting the power to the HVAC unit, the crew will remove any refrigerant from the AC system and begin disassembling and removing the old equipment.

Depending on the scope of your project, duct work repairand/or replacement may be involved. One or two crew members will typically begin this work, while the lead installer begins assembling the new equipment. If major ductwork is involved in your HVAC project, you can expect to have crew members negotiating their way through attics and crawl spaces to make the repairs or modifications necessary for the new equipment. In addition, major ductwork could prolong the completion of the HVAC replacement, so plan accordingly.

After repairing or modifying the existing ductwork, the crew will begin installing the new equipment to manufacturers specifications. Depending on the type of system you choose, the equipment may be installed both inside and outside your home. The components installed may include the inside air handler or evaporator, outside compressor or condensing unit, new refrigerant supply lines, thermostat, condensate drain lines, and the condensate pump when applicable. In addition, while most HVAC contractors can upgrade wiring and circuit breakers during a typical HVAC installation, major changes to the propertys electrical system and circuitry may require the services of a licensed electrical contractor.

As with many home improvement projects, unexpected repairsin addition to your written estimatecan pop up that are necessary to complete the project. These might include replacing damaged ductwork, rotten wall studs, electrical upgrades, and drywall repairs that are not included in your estimate. While most HVAC contractors will try to cover all the bases in the initial estimate, there are things that cannot be assessed until the project has started.

Upon completing HVACreplacement installation, pressure and vacuum tests are performed before charging the system with new refrigerant. After a complete inspection of the new HVAC system, refrigerant is added and the system is activated and retested to ensure all components are working properly.

After all testing is complete, your HVAC contractor should go over proper operation of the new system and warranty information as well as answer any questions. Then youll be ready to reap the benefits of a more comfortable home.

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Replacing an HVAC System - What to Expect? - Modernize