Furnace Installation in Dedham, MA

Your Furnace Fails, We Fix It Fast

Professional gas furnace installation that keeps your Dedham home warm all winter long.

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Gas Furnace Installer Dedham

Reliable Heat When You Need It

Your old furnace picked the worst possible time to quit. It’s 15 degrees outside, the kids are asking why the house is so cold, and you’re wondering how much this is going to cost.

Here’s what happens when we install your new furnace correctly. You stop worrying about whether your heat will work when you wake up tomorrow. Your energy bills drop because modern furnaces actually use fuel efficiently instead of burning money. The house heats evenly instead of leaving some rooms freezing while others feel like saunas.

You get a system that works reliably for the next 15-20 years. No more emergency repair calls at midnight. No more space heaters running up your electric bill. Just consistent, dependable heat that keeps your family comfortable through every Massachusetts winter.

Dedham Furnace Installation Experts

We Know Norfolk County Heating

Dempsey Energy has been installing furnaces for Dedham families who need heating systems that actually work. We understand Massachusetts winters don’t give you a second chance when your furnace fails.

Our team handles the complete installation process, from sizing your new system correctly to pulling permits and scheduling inspections. Our customer base has grown to over 12,000 homeowners due to our consistent punctuality and commitment to completing the job correctly on the first attempt.

When you join our Dempsey Comfort Club, you get ongoing maintenance that keeps your new furnace running efficiently year after year. We’re not just installing equipment and disappearing—we’re your long-term heating partner.

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New Furnace Installation Process

Here's How We Install Your Furnace

First, we assess your current system and calculate the right size furnace for your home. Too small and you’ll never stay warm. Too big and you’ll waste money on energy bills. We measure your space, check your ductwork, and recommend the most efficient system for your specific situation.

Next, we handle all the paperwork. Permits, utility notifications, and inspection scheduling—we take care of the bureaucratic headaches so you don’t have to figure out Massachusetts building codes.

Installation day starts with protecting your floors and furniture. We remove your old system, install the new furnace, connect all gas lines and electrical components, and test everything thoroughly. Before we leave, we walk you through your new system’s operation and maintenance requirements. You’ll know exactly how everything works and what to expect from your investment.

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Complete Furnace Installation Service

What's Included in Your Installation

Your furnace installation includes complete system sizing, professional installation of all components, gas line connections, electrical hookups, and thorough testing. We handle permit applications and coordinate required inspections with local authorities.

We also evaluate your existing ductwork during installation. If your ducts are leaking or poorly designed, we’ll identify those issues and explain how they affect your new furnace’s performance. Many Dedham homes have ductwork problems that waste energy and reduce comfort.

After installation, you receive warranty coverage on both the equipment and our installation work. Our Dempsey Comfort Club membership gives you priority scheduling for maintenance and repairs, plus discounts on future service calls. We stay connected with our customers because your heating system needs attention throughout its lifespan.

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Most furnace installations in Dedham take 4-8 hours for a transparent replacement. If we’re upgrading your gas lines, modifying ductwork, or dealing with older home complications, it might extend to a full day or require a second visit. We’ll give you a realistic timeline upfront based on your specific situation. Factors that affect timing include the location of your current furnace, accessibility for removing the old unit, and whether your electrical panel needs updates to handle the new system’s requirements.
Furnace sizing depends on your home’s square footage, insulation quality, window efficiency, and ceiling height. Many Dedham homes need 80,000-120,000 BTU systems, but we calculate the exact requirement using Manual J load calculations. Installing an oversized furnace wastes energy and creates uneven heating. An undersized system will run constantly and never keep you comfortable. We measure your space, assess insulation levels, and factor in Massachusetts climate data to determine the right capacity for efficient operation.
Yes, we install high-efficiency gas furnaces with AFUE ratings up to 96%. These systems extract more heat from every dollar of natural gas, which matters during expensive Massachusetts winters. During installation, we take care of the condensate drainage and special venting needed for high-efficiency models. The upfront cost is higher, but you’ll see the difference in your monthly gas bills. We’ll calculate potential energy savings based on your current usage to help you decide if the efficiency upgrade makes financial sense for your situation.
Dedham requires mechanical permits for furnace installation, and you’ll need electrical permits if we’re upgrading your electrical connections. We handle all permit applications and scheduling required inspections with the town. The process typically takes a few days to get approval, which is why we recommend scheduling your installation in advance rather than waiting for an emergency. Gas line work also requires utility notification and pressure testing. We coordinate all these requirements so your installation meets local codes and passes inspection.
Absolutely. We evaluate your existing ductwork during the installation assessment and identify any repairs or modifications needed for optimal performance. Leaky ducts waste up to 30% of your heating energy, so fixing them makes your new furnace more efficient. Common issues in Norfolk County homes include disconnected joints, inadequate insulation, and improperly sized return air ducts. We can handle ductwork repairs as part of your furnace installation project or recommend prioritizing the most critical fixes if budget is a concern.
You receive manufacturer warranty coverage on the furnace equipment itself, typically 10-20 years depending on the model and components. Our installation work is covered by our labor warranty, which protects you if installation-related issues develop. We also offer extended warranty options through our Dempsey Comfort Club membership, which includes priority service scheduling and discounted repairs. If problems arise with your new system, we’ll diagnose whether it’s a manufacturing defect covered by the equipment warranty or an installation issue covered by our workmanship guarantee.