
When it's time to replace your old furnace or install a new heating system, Northwoods Heating LLC delivers the expert craftsmanship and honest guidance northern New Hampshire homeowners deserve. Our certified technicians specialize exclusively in oil furnace installation, bringing over two decades of focused expertise to every project.
We understand that a new furnace is a significant investment—and in our harsh New Hampshire winters, it's one you can't afford to get wrong. That's why we take the time to properly size your system, recommend the most efficient options for your home, and ensure every installation meets strict safety and code requirements. From selecting the right equipment to meticulous installation and testing, we're with you every step of the way.

Most oil furnaces last 15-20 years. If yours is approaching or past this age, it's time to consider replacement before it fails during the coldest weeks of winter.
If you're calling for repairs multiple times per season, those costs can quickly exceed the value of your aging furnace. A new, efficient system often pays for itself.
Older furnaces lose efficiency over time. If your oil consumption has increased despite similar usage, a new high-efficiency furnace could significantly reduce your fuel costs.
Some rooms too hot, others too cold? Your furnace may be struggling to distribute heat properly—a sign it's losing capacity or wasn't sized correctly in the first place.
Short cycling (turning on and off repeatedly) or running non-stop both indicate your furnace is failing or undersized for your heating needs.
Banging, rumbling, squealing, or rattling sounds often signal serious mechanical problems that may not be worth repairing in an older system.
A healthy oil burner flame should be steady and blue. A yellow or unstable flame indicates incomplete combustion and potential safety issues.
Adding insulation, new windows, or expanding your living space? Now is the perfect time to reassess your heating needs and upgrade to a properly sized system.

Step 1: Free Consultation & System Assessment
We start by evaluating your home's heating needs, existing system, and your comfort goals. We'll discuss your budget, explain your options, and help you select the right furnace for your home—no pressure, just honest guidance from a local heating expert.
Step 2: Detailed Proposal & Scheduling
You'll receive a clear, written proposal outlining the work, equipment specifications, timeline, and cost. Once approved, we schedule your installation at a time that works for you, typically within 1-2 weeks.
Step 3: Professional Installation
Our certified technicians arrive on time and work efficiently to minimize disruption to your home. We handle all aspects of the installation including removing your old furnace, installing the new system, connecting fuel lines and ductwork, running all electrical and control wiring, and ensuring proper venting and code compliance.
Step 4: Testing, Calibration & Walkthrough
Before we leave, we thoroughly test your new furnace to ensure it's operating at peak efficiency and safety. We'll walk you through how to operate your system, adjust your thermostat, and maintain your investment. You'll have our number for any questions.
And surrounding northern New Hampshire communities.
Not sure if we service your area? Give us a call at (603) 348-4251.
Most residential oil furnace installations are completed in one day, typically 6-8 hours depending on the complexity of your home's setup. We'll give you a specific timeline during your consultation. Our goal is to have you back to full heat as quickly as possible.
Furnace installation costs vary based on system size, efficiency rating, and your home's specific requirements. Most residential installations in northern NH range from $4,500 to $8,000 including equipment, labor, and permits. We provide transparent, written quotes with no hidden fees.
We perform a professional heat load calculation that factors in your home's square footage, insulation levels, window quality, ceiling heights, and northern New Hampshire's climate. Proper sizing is critical—we never guess. An oversized furnace wastes fuel and wears out faster, while an undersized system can't keep up on the coldest days.
We install quality oil furnaces from trusted manufacturers known for reliability and efficiency in northern climates. During your consultation, we'll recommend specific models that fit your needs and budget. We only recommend equipment we'd install in our own homes.
Yes, removal of your existing furnace and proper disposal is included in our installation service. We'll also clean up completely before we leave—you won't even know we were there except for your new, efficient heating system.
We recommend annual maintenance, ideally in early fall before heating season begins. Regular tune-ups keep your warranty valid, maintain efficiency, prevent breakdowns, and extend your furnace's lifespan. We'll send you reminders each year.
