Wilton, NH Heating System Replacement Costs — HVAC Guide

Estimated Read Time: 9 minutes

Homeowners search for furnace replacement cost because no one wants surprises. Here is the straight talk on furnace replacement cost in New Hampshire, so you can plan with confidence and choose the right system for your home. We will cover price ranges, what affects your final number, and how to avoid add‑ons that do not pay you back. If you are in Nashua, Manchester, or nearby, this is for you.

What Drives the Cost of Furnace Replacement

Several factors build your total investment:

• Equipment efficiency and brand tier.
• Correct size for your home based on a load calculation.
• Venting, gas or oil line updates, and electrical work.
• Ductwork condition or modifications.
• Thermostat, filtration, and indoor air quality upgrades.
• Warranty coverage and contractor workmanship.

Smart tip: ask for a line‑item quote that separates equipment, labor, materials, permits, and add‑ons. This prevents scope drift and protects your budget.

Typical Furnace Price Ranges in New Hampshire

Every home is different, but these brackets help you set expectations for a standard, code‑compliant install by a licensed team:

• 80% AFUE gas furnace: entry to mid tier equipment and install.
• 95% to 97% AFUE high‑efficiency gas furnace with direct venting: mid to upper range.
• Two‑stage or modulating gas furnace with advanced controls: upper range.
• Oil furnace replacement with new tank connections and venting: varies based on oil line and venting requirements.
• Electric furnace or air handler: equipment is often less, but operating cost can be higher depending on electric rates.

Price ranges shift with duct repairs, venting routes, and local code requirements. A site visit is the only way to finalize the number.

Sizing Matters: Why a Manual J Load Calculation Saves Money

Oversized furnaces short cycle, cause comfort swings, and waste fuel. Undersized equipment runs longer and can fail early. Your contractor should perform a Manual J heat load calculation. This factors in square footage, insulation, window type, orientation, and air leakage. Correct sizing protects your comfort and your equipment warranty.

What to ask for:

1. A documented load report or a summary of the inputs used.
2. The selected furnace output compared to the required load.
3. Any assumptions about future insulation or window upgrades.

Ductwork, High‑Velocity, and Ductless Options

If your ducts are leaky, undersized, or contaminated, replacing a furnace alone will not deliver results. Sealing, balancing, or resizing may be needed. Older homes in Portsmouth or Dover may lack space for standard ducts. Two proven options:

• High‑velocity HVAC: small, flexible ducts that fit tight spaces with even temperature distribution and quiet operation. Our licensed team designs, installs, and maintains these systems.
• Ductless mini splits: targeted heating zones with no ducts and efficient operation. Great for additions, third floors, or homes with limited ductwork.

Discuss these paths if your current ducts are failing or if you want zoning.

Installation Complexity: The Hidden Drivers

The fastest way to blow a budget is ignoring the jobsite details. A quality install includes:

• Venting: proper intake and exhaust clearances with safe routing through the rim joist or roof.
• Fuel lines: gas or oil lines sized and secured to code, with shutoffs and drip legs where required.
• Electrical: a dedicated circuit, correct breaker size, and clean low‑voltage wiring.
• Condensate management for high‑efficiency furnaces with neutralizer if required.
• Permits and inspections where applicable.

Hard fact: Paul The Plumber backs all installs with a 2‑year parts and labor warranty, extendable to 3 years with our club. BBB A+ accreditation reflects consistent code‑compliant work.

Add‑Ons That Are Worth It

Not every upgrade belongs in your quote. These usually are smart investments:

• Programmable or smart thermostat for staging, comfort, and fuel savings.
• High‑MERV or media filtration that protects the heat exchanger and your lungs.
• Fresh‑air intake or ventilating strategies if your home is tight.
• Zoning or balancing for multi‑level homes in Londonderry, Derry, or Salem.

Ask your tech to quantify benefits in comfort, air quality, and maintenance savings.

Labor, Warranty, and Why Contractor Quality Changes Price

Two identical furnaces can perform very differently. The difference is the install. Look for:

1. Licensed, background‑checked technicians who follow manufacturer specs.
2. Photos of plumb, level, and labeled work.
3. Clear warranty terms in writing. Our standard is 2 years parts and labor, with 3 years for club members.
4. Upfront, line‑item pricing so you understand the total.

Reputable installers cost more but protect you from repeat service calls and premature failure.

Rebates and Tax Credits

There may be federal and utility incentives for high‑efficiency furnaces and controls. Federal tax credits have been available for qualifying ENERGY STAR equipment, subject to yearly program rules and caps. Local utility programs in New Hampshire change often. Ask your estimator to confirm current rebates and complete paperwork. We help customers navigate these so you do not leave money on the table.

Timeline: What to Expect on Install Day

Most replacements take one day. Complex oil or venting projects can take longer. A professional crew will:

• Protect floors and walkways.
• Remove and dispose of the old unit.
• Set the new furnace, connect venting and fuel lines, wire controls, and pressure test.
• Start up, check combustion, and balance airflow.
• Train you on operation and maintenance.

In winter emergencies we can provide temporary heat to keep your family safe while work is completed.

Budgeting and Avoiding Surprise Costs

Stop surprises by asking for these details in writing:

• Exact model numbers and efficiency ratings.
• All venting, electrical, and fuel line work included.
• Duct changes and who pays for patching or carpentry.
• Permit and inspection fees.
• Warranty terms and maintenance requirements.
• Lead times for equipment and parts.

If a quote is vague, request a revision before you sign.

Repair vs. Replace: A Simple Rule of Thumb

Consider replacement when:

• Your furnace is 12 to 20 years old and needs a major repair.
• The repair exceeds 30 to 40 percent of a new system cost.
• Your heat exchanger is cracked or the unit is unsafe.
• Comfort is poor in key rooms even after repairs and balancing.

A quick diagnostic will reveal if a repair can buy you safe time or if replacement is smarter.

What a Firm Quote Should Include

Ask your estimator to deliver a clear proposal with:

1. System overview, model numbers, and efficiency.
2. Scope of work, materials, and disposal.
3. Ductwork and venting details.
4. Permits, inspections, and code compliance.
5. Warranty coverage and service plan options.
6. Final price with any coupons or rebates applied.

This protects your budget and sets quality expectations for the crew.

Local Pricing Notes for Southern New Hampshire

Homes in Nashua, Merrimack, and Hudson often have finished basements and tighter venting paths. Portsmouth and Dover homes can be older with limited duct space, which may favor high‑velocity or ductless solutions. These differences affect labor time and material cost. A short site visit lets us tailor the quote to your home.

Ownership Costs After the Install

Prevent avoidable repairs and keep efficiency high with maintenance. Our checklist is transparent and thorough:

"Cleaning: We clean all components of your heating system, including the burners, heat exchanger, and blower. Inspection: Our technicians inspect your heating system for any signs of wear and tear or potential problems. Tune-Up: We tune up your heating system to ensure it is running at peak efficiency. Safety Check: We perform a safety check to ensure your heating system is operating safely and not posing any risks to your family."

Members of Paul’s Promise Plan get priority service, exclusive savings, and an extended warranty. The plan keeps your system reliable through New Hampshire winters and documents care for warranty protection.

Why Homeowners Choose Paul The Plumber

• BBB accredited with an A+ rating.
• Thousands of verified 5‑star reviews and a 4.8 average on Google.
• Licensed, background‑checked technicians who respect your home.
• Upfront pricing with written, line‑item proposals.
• 2‑year parts and labor warranty, extendable to 3 years for club members.

If you want a furnace that is sized right, installed cleanly, and supported locally, we are ready to help.

Special Offers on Heating Services

• Special Offer: Save $200 on furnace installation or replacement. Use offer "$200 OFF FURNACE INSTALLS" before 12/31/2025. Mention this offer when booking.
• Special Offer: Save $50 on furnace repair. Use offer "$50 OFF FURNACE REPAIR" before 12/31/2025. Mention this offer when booking.
• Special Offer: Save $200 on heating system installation or replacement. Use offer "$200 OFF HEATING SYSTEM INSTALLATION OR REPLACEMENT" before 12/31/2025. Mention this offer when booking.

Fine print: Coupons and special offers cannot be combined. Valid on standard pricing only. Limit one per household. Present and mention the coupon prior to job start.

What Homeowners Are Saying

"Paul The Plumber installed an entirely new heating system in my 100-year-old historic home, including removal of original radiators and installation of new forced hot water heat throughout the house... They did an excellent job with a very challenging project and treated my property with extreme care."
–Dianne C., Heating System Installation

"The team did a fabulous job installing our new boiler... It was a three day job and PTP supplied a number of space heaters to keep us warm and a temporary hot water heater so we could shower and use the dishwasher... When the job was completed, Keith patiently explained all we needed to know."
–Norm K., Boiler Installation

"Contacted ptp for a yearly insp and cleaning of our heating system and plumbing and it could not have been better. Mike, Ben, and Kyle showed up on time and were very professional."
–Papa B., Annual Heating Maintenance

Frequently Asked Questions

How much does a furnace replacement cost in New Hampshire?

Final price depends on efficiency, venting, ductwork, and labor. A site visit is the only way to confirm. Ask for a line‑item quote that includes equipment, labor, permits, and any add‑ons.

Do I need new ductwork when replacing my furnace?

Not always. If ducts are sized, sealed, and clean, you may reuse them. Repairs or balancing can boost comfort. Older homes may benefit from high‑velocity or ductless solutions.

Are rebates or tax credits available for new furnaces?

Often yes for qualifying high‑efficiency systems. Federal and utility incentives change. We will check current programs, confirm eligibility, and help with paperwork.

How long does furnace installation take?

Most straight replacements finish in one day. Complex venting, oil line work, or control upgrades can add time. Your estimator will outline the schedule before work begins.

What warranties come with a new furnace from Paul The Plumber?

We provide upfront pricing and a 2‑year parts and labor warranty. Club members can extend to 3 years. Ask for all warranty terms in writing with your quote.

In Summary

Now you know what truly drives furnace replacement cost and how to avoid surprises. If you need furnace replacement cost guidance in Southern New Hampshire, we will deliver a precise, line‑item quote and a clean, code‑compliant install. Ready for a no‑pressure estimate? Call (603) 541-7986 or visit https://www.paultheplumbernh.com/. Mention "$200 OFF FURNACE INSTALLS" before 12/31/2025 to save on your project.

Get Your Firm, Line‑Item Quote Today

• Call: (603) 541-7986
• Schedule online: https://www.paultheplumbernh.com/
• Current offers: $200 OFF FURNACE INSTALLS and $50 OFF FURNACE REPAIR through 12/31/2025. Mention the offer when booking.

Ask us for a free comfort assessment, a Manual J load calculation, and a written scope with permits, warranties, and rebates applied. We serve Nashua, Manchester, Concord, Derry, Salem, Merrimack, and nearby.

About Paul The Plumber

Paul The Plumber is a family‑owned, BBB A+ rated HVAC team serving Southern New Hampshire. Our licensed, background‑checked technicians deliver upfront pricing and clean, code‑compliant installs. We back our work with a 2‑year parts and labor warranty, extendable to 3 years for club members. Thousands of verified 5‑star reviews prove our focus on service, safety, and reliability. From high‑efficiency furnaces to high‑velocity and ductless systems, we tailor solutions to your home and budget.