What to Expect During a Heating System Replacement

A heating system replacement typically includes removing the old or broken system, conducting load calculations, sizing the system, and installing it. If you’re in the market for a new heating system, this guide will help set expectations of what happens during the replacement process. The exact project scope will vary by home and the type of equipment, but we'll walk through each stage so you know what to expect from start to finish.

Step 1: Evaluate Your Existing Heating System

Before a heating system replacement, you should first evaluate your current equipment’s condition, repair history, and performance. Are you having comfort problems at home? Struggling with uneven heating? These issues may be a reason to have the system evaluated, especially when they occur alongside repeated repairs, declining reliability, or major component problems.

Consider your existing ductwork and priorities when deciding which heating system best suits your needs. Homes with well-sealed ductwork can often use a furnace or a ducted heat pump, while homes without ductwork may use a ductless mini-split or a boiler with radiators or radiant floors.

Step 2: Determine Whether Repair or Replacement Makes More Sense

Once you’ve taken a close look at your existing heating system, you can determine whether repair or replacement is necessary. A skilled HVAC technician can provide a diagnosis for performance issues and share repair costs and how reliable it is likely to be afterward.

Sometimes, if your heating system has gone through repeated costly repairs, replacing your system can be more cost-effective. Your long-term plans matter here too. If you plan to stay in your home for many years, long-term efficiency, reliability, and operating needs may carry more weight in the decision. If you’re planning to sell your home soon, you may be able to just make targeted repairs.

Step 3: Perform a Heating Load Calculation

If you’ve decided replacement is the better option, load calculations ensure that your new system is properly sized to match your home’s heating needs, rather than a rough estimate. A heating technician will calculate how much heat your home loses on cold days and help you choose equipment to cover that demand.

They will consider your home size, insulation quality, windows, air leakage, layout, local climate, and the number of occupants in your house.

Step 4: Choose the New Heating System

Next, choose a heating setup for your home. You have many options, including a furnace, heat pump, dual-fuel system, or other compatible equipment. Your HVAC technician will help you narrow down the choices based on the results of the load calculation, your existing ductwork, and power or fuel sources.

Furnace Replacement

If you already have a furnace installed, you may want to just swap it out for a modern, more efficient system. A furnace replacement is ideal when your home’s ductwork, venting, and fuel source are all in good condition. Most of the existing infrastructure can remain in place with a like-for-like swap.

Heat Pump Replacement

A heat pump can provide both efficient heating and cooling for your home. However, you must evaluate your home’s electrical capacity to make sure the panel can handle the extra load. Heat pumps are also best for regions with mild winters, as cold-weather performance can suffer in extremely low temperatures. A technician can help with system sizing to ensure optimal year-round performance.

Step 5: Review the Installation Scope

An HVAC technician should walk you through the entire scope of your heating system replacement so there are no surprises. Depending on your home, the project may include:

• Equipment removal: The technician will disconnect and safely remove the old or broken heating system and dispose of any refrigerant or fuel connections.
• Duct modifications: Your ductwork may need modification to match the new equipment’s needs.
• Electrical work: Your new system may require some electrical work, such as updating wiring, breakers, or disconnects.
• Gas work: For gas-fired equipment, you may need to connect or modify gas lines, shutoff valves, and venting.
• Thermostat and control changes: You might need a smart or programmable thermostat that’s compatible with your new system.
• Permits: Most areas require permits and inspections for heating system replacements. The technician can typically handle the paperwork and scheduling for you.

Step 6: Remove the Old Equipment

After the scope has been confirmed, the technicians will remove your old heating system. This step should only be completed by licensed professionals since it involves handling fuel, electrical, and refrigerant connections that must be handled safely and in line with local and national codes.

The crew will prepare the area by protecting the floor. Then, they will shut off the power and fuel supply to the system. Technicians will disconnect the old equipment from its fuel, electrical, venting, and ductwork connections. Lastly, the old unit is removed from the home and the area is cleared for the new equipment.

Step 7: Install the New Heating System

Next, the technicians will install your new system according to the manufacturer's specifications and local code requirements. The new system is positioned properly to allow for airflow and accessibility. The technicians will connect the system to the ductwork and seal it. Then, they will make electrical and fuel connections, when applicable.

For high-efficiency furnaces and heat pumps, a drain line is installed to carry away condensate. A thermostat or control system will also be installed and configured to work with the new system. The team will follow local building and safety codes throughout the process and schedule required inspections.

Step 8: Test and Commission the System

Lastly, HVAC technicians will test the system to confirm it’s operating properly and safely before leaving your home. Typically, technicians will start up your equipment and run it through a full heating cycle to watch for any unusual behavior. They will check that airflow is not impaired since poor airflow can cause uneven heating and strain.

The technicians should also test to make sure your thermostat is communicating properly with the new system and that safety controls, like limit switches and shutoffs, are working as intended. They will also follow the system manufacturer's startup and commissioning steps so the installation meets warranty requirements.

How Long Does Heating System Replacement Take?

Heating system replacement timelines vary based on scope. For straightforward replacements, timelines will be shorter than projects requiring duct, electrical, fuel, or other modifications. A licensed technician can give you an estimated timeline for your unique heating replacement.

What Affects Heating System Replacement Cost?

The cost of heating system replacement depends on several factors, including:

• Equipment type: Whether you choose a ductless mini-split, gas furnace, or heat pump will impact total replacement costs.

• Capacity: The system’s size and heating capacity will also influence the price tag.
• Efficiency: Higher efficiency systems are often more expensive than standard units.
• Ductwork: If you need to modify or add ductwork, that adds another layer of cost.
• Electrical work: Electrical upgrades may be required to meet the needs of a new heat pump and increase the cost of replacement.
• Gas/venting work: Similarly, if your home needs gas line or venting work for a furnace, expect costs to go up.
• Controls: The type of thermostat you choose also plays a factor into the cost.
• Installation complexity: Straightforward swaps are less expensive than complex replacements requiring ductwork changes or gas or electrical work.

What Should Homeowners Do Before Installation Day?

To prepare for a safe installation day, you should ensure technicians have clear access to the heating system. Confirm parking is available for the crew, secure pets, and ask what technicians will need to reach beforehand. You can also discuss thermostat needs to be prepared with the right equipment.

What Happens After Installation?

After installation, the technician should complete a system walkthrough to ensure you understand how it operates. Additionally, they will provide thermostat guidance and maintenance recommendations. The technician should also provide warranty documentation, air filter replacement guidelines, and answer any questions you have.

Heating System Replacement in Olympia & Tumwater

G&G Heating offers safe heating system replacement throughout Olympia and Tumwater, WA. Whether you’re interested in a furnace, heat pump, ductless mini-split, or boiler and radiator, our team can help. We understand local homeowners’ challenges in western Washington and work to provide reliable home comfort.

Ask G&G About Heating Replacement Options

The team at G&G Heating offers years of experience and industry knowledge in heating replacement. If your HVAC is nearing the end of its life, it’s time to call G&G for heating and HVAC services. Contact us to learn more about your heating replacement options in Olympia and Tumwater.

Schedule Online(360) 499-6604