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Book A ServiceFurnace Installation & Replacement in Salem, NH
Full-Service Furnace Installation, Repair & Replacement
When your furnace is failing, past 15 years old, or simply no longer keeping up with your home’s heating demands, we’re ready to help. At Cornerstone Services, we handle furnace installation, repair, and replacement for residential and commercial properties across Salem and southern New Hampshire. Every job is backed by our signed workmanship warranty and flat-rate pricing, so you know exactly what you’re paying before we start.
Staying ahead of breakdowns is easier with a professional inspection. Our technicians can assess your current system, explain what’s going on, and either schedule repairs or walk you through a full replacement, depending on what makes the most sense for your situation.
Don’t wait for a breakdown in the middle of winter. Call Cornerstone Services at (603) 874-1402 to schedule your furnace consultation, and we’ll work to get someone out the same day.
Furnace Installation Services in Salem, NH
A failing furnace in January isn’t just uncomfortable. It can be a genuine safety concern for your family or tenants. We can help you get ahead of that by walking you through the installation process from the first consultation to the final test run. During your initial visit, we discuss your property’s heating needs, compare furnace types and efficiency ratings, and recommend the model that fits your budget and performance priorities.
Once you’ve made your choice, we remove the old unit and install the new one cleanly and professionally. Our technicians protect your home while we work, clean up when the job is done, and don’t leave until the system is running properly and you’re satisfied with the result.
How to Choose the Right Furnace for Your Home
Choosing a furnace isn’t just about picking a brand. The right unit depends on your home’s size, fuel source, existing ductwork, and efficiency goals. We walk you through every decision rather than leaving you to sort it out on your own.
Furnace Type
Gas, electric, and oil furnaces each come with trade-offs. Gas furnaces are a popular choice and can reach AFUE ratings (Annual Fuel Utilization Efficiency, a measure of how much fuel a furnace converts into heat) of up to 98%. Oil furnaces typically fall in the 60 to 80% AFUE range, and electric models vary based on local energy costs.
Gas furnaces come in single-stage and two-stage configurations. A single-stage furnace runs at full capacity every time it cycles on. A two-stage furnace operates at a lower setting by default and only ramps up when the temperature demands it, which can improve efficiency and reduce day-to-day noise. You’ll also want to consider whether a fixed-speed or variable-speed blower fits your needs. Variable-speed blowers can distribute heat more evenly and use less energy over time.
Furnace Size
Size matters more than most homeowners realize. An undersized furnace leaves cold spots throughout the house. An oversized one cycles on and off too frequently, wears out faster, and wastes fuel. We determine the correct size by evaluating your home’s square footage, ceiling height, insulation level, and window count before making any recommendation.
Fuel Efficiency
When comparing models, focus on the AFUE rating. A higher percentage means more of the fuel you pay for actually becomes heat in your home. For most homeowners in New Hampshire, a high-efficiency gas furnace with an AFUE of 90% or above can offer strong long-term value, especially during extended cold seasons.
Furnace Repair Services in NH
A furnace that’s blowing cold air, short-cycling, or producing unfamiliar sounds needs attention before the problem escalates. Our technicians are licensed and trained to work on a wide range of furnace brands and can diagnose issues accurately rather than guessing at the fix.
Common furnace problems we address include:
- No heat output: Could indicate a malfunctioning thermostat, leaking ducts, or an internal furnace defect. We inspect the full system to find the source.
- Pilot light not blue: A yellow or orange pilot light signals ventilation issues and possible carbon monoxide buildup. This is a health and safety emergency that requires immediate professional attention.
- Unusual noises: Banging, squealing, whistling, scraping, or popping can range from a worn fan belt to a failing motor. We diagnose the cause and fix it at the source.
- Unpleasant odors: Gaseous smells may indicate a gas leak and require immediate service. Dust or debris odors can signal a fire hazard and should be cleared by a trained technician.
- Poor indoor air quality: A poorly maintained furnace can circulate allergens, dust, and bacteria throughout your home. Replacing the filter and cleaning the ductwork often helps address this.
Furnace Replacement in Salem & Southern NH
If your furnace is 12 to 15 years old, requires frequent furnace repair calls, or has caused your utility bills to spike without explanation, replacement may be the more cost-effective path. We handle the full process and make sure your new system is sized and configured correctly for your property.
Upgrading to a modern furnace can offer clear benefits:
- Greater efficiency: Today’s models can outperform units made even a decade ago, which may help reduce monthly energy bills.
- Longer service life: Modern furnaces can provide longer service with routine maintenance than older units at the same age.
- Quieter operation: Newer systems can heat your home with less disruptive noise than older furnaces are known for.
What to Expect During a Furnace Maintenance Appointment
Annual maintenance can extend the life of your furnace and help catch minor problems before they become expensive failures. Our technicians perform thorough tune-ups that cover every critical component of the system.
During a maintenance visit, our technicians will:
- Examine the vent system for leaks or blockages
- Inspect the heat exchanger for corrosion or wear
- Clean the blower and its components
- Conduct an amp-draw test on the blower motor
- Test the burner and flame sensor for proper operation
- Lubricate the unit’s moving parts
- Inspect electrical connections for signs of corrosion
- Examine the flue for blockages that could direct toxic fumes into your home
- Inspect the furnace’s safety controls
- Replace the air filter
- Test the thermostat
Schedule Furnace Service with Cornerstone Services
We’re based in Salem, NH and serve residential and commercial customers throughout southern New Hampshire and northern Massachusetts. With more than 1,250 five-star reviews across Google, HomeAdvisor, Facebook, and Yelp, our reputation reflects what we put into every job.
We offer same-day scheduling, per-job flat-rate pricing, and 24/7 availability for when heating problems can’t wait.
Call Cornerstone Services at (603) 874-1402 to schedule furnace installation, repair, replacement, or maintenance. We can give you an upfront price, show up when we say we will, and back every job with a signed workmanship warranty.
The Cornerstone Difference: Built on Trust. Backed by Service.
The service standards behind the thousands of positive experiences our customers share year after year.
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Flat-Rate Pricing
The price you're quoted before the job begins is the price you pay at completion, no hourly adjustments, no surprise charges.
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On-Time Arrival
Service vehicles are staged at multiple locations so we show up when we say we will, not hours after your window closes.
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Signed Workmanship Warranty
Every job comes with a signed warranty under our quality assurance policy. You get a written record of what the work covers.
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Background-Checked Workers
Every technician passes a background check before they step onto your property, regardless of the trade or type of job.
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Same-Day Scheduling
Call us and we'll work to get a technician out the same day. Our on-call staff is available 24 hours a day, every day of the week.
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Clean Job Sites
Your home or business will be left clean when we're done. Technicians are responsible for cleaning up after every job, no exceptions.
1,250+ Five-Star Reviews & Counting
We let our work speak for itself. From quick repairs to major installs, our customers say it best.
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Paul Quinn did electrical work for me and he was the best!Nicola Sullivan
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Michael with Cornerstone Services was excellent to work with.Jamie Fasbender
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He was very professional and explained all that he was doing.Mary Duford
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Showed up as agreed and was very informative.John Cote
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Fast response and very professional.Anne Butterworth
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On time. Thorough. Kind. Positive attitude in this awful heat.N N
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Cornerstone came promptly and fixed them.Marilyn Frank
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He and his partner PJ worked quickly and efficiently to solve a dryer vent issue we had been experiencing.Pierre Thelusma
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Took care of our electrical needs with ease!Peter Larocque
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He was quick, thorough, professional, and made sure everything was done right.Jess Nichol
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10/10 experience and so happy we got in touch with him and this company!Anthony Capozzi
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They were so neat, you would never know there was a problem.Bill Mullen
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Paul is always friendly, polite, and professional.Cindy Marcin
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Paul was efficient and expert at correcting the problem and ensuring all was well.Woodrow Cook
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He went above and beyond for me when some unforeseen issues arose with my bathtub install.Susan Hevey
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Tech was on time, friendly, and competent.Vincent JJ Balukonis
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He was very thorough and quickly corrected the issue.Gary Chisholm
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Josh was very prompt with his services and explained things clearly.Kim Mcanany
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Arnold is a pleasure to work with.Esther Bradbury
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Jason is always great and knowledgeable and friendly.Mark Duell