Heat Pump Installation Cost in Derry and Rockingham County: 2026 Pricing Guide
Quick Answer: Heat pump installation in Derry and surrounding Rockingham County communities typically costs between $6,500 – $25,000, with larger multi-zone or ducted systems reaching $30,000 – $45,000. These are planning ranges. Actual cost depends on system type (ducted vs. ductless), home size, existing heating setup, electrical panel capacity, and whether the home qualifies for NH Saves rebates. Paul the Plumber provides upfront pricing after assessing your home.
How Much Does Heat Pump Installation Cost in Derry and Rockingham County?
Heat pump installation is increasingly popular in Derry and surrounding Rockingham County communities as homeowners seek to replace aging oil furnaces and reduce heating costs. Most complete installations run between $12,000 – $50,000, depending on whether you’re installing a ducted central heat pump, ductless mini-splits, or a hybrid dual-fuel system.
The Derry area sits in ASHRAE Climate Zone 5A with cold-humid winters (roughly 6,500–7,200 heating degree days or HDD) and moderate cooling needs. Modern cold-climate heat pumps rated to negative 13 degrees Fahrenheit or lower perform reliably here, though some homeowners pair heat pumps with existing oil or gas systems as backup for the coldest nights.
Paul the Plumber has served Derry and surrounding communities for over 22 years and specializes in heat pump sizing, installation, and cold-climate equipment selection. With a 4.8-star rating based on 2,900+ verified reviews and a BBB A+ accreditation, we help homeowners navigate the heat pump transition with confidence.
| Heat Pump Project Type | Paul’s Typical Range | Best Fit | Key Factors |
| Single-zone ductless mini-split | $6,500 – $12,000 | One room, addition, bonus room, or comfort zone | 1 indoor head, 1 outdoor unit, limited ductwork |
| Multi-zone ductless heat pump | $13,000 – $40,000 | Older homes without central ductwork, multiple comfort zones | 2–8 indoor heads, 1 outdoor unit (or multi-outdoor) |
| Ducted (central) heat pump | $15,000 – $19,000 | Homes with usable central ductwork, whole-home heating and cooling | Full-home air handler, outdoor condenser, existing ducts |
| Cold-climate heat pump (single or multi-zone) | $6,600 – $50,000 | Derry-area heating priority, designed for Zone 5A winters | Specialized equipment (Mitsubishi, Fujitsu, Bosch, Carrier cold-climate models) |
What Factors Affect Heat Pump Installation Cost in Derry?
Ducted vs. Ductless
Ducted (central) heat pumps use existing ductwork and are ideal for homes with well-maintained ducts. Ductless mini-splits require no ductwork and work well in older Derry homes where ductwork is absent, inaccessible, or damaged. Each approach has cost and comfort tradeoffs.
Number of Zones
Single-zone mini-splits (one room or addition) cost less than multi-zone systems. A whole-home ductless setup with 3–4 indoor heads can run $10,000 – $18,000 before rebates, offering flexibility for room-by-room comfort.
Cold-Climate Equipment Selection
The Derry area requires equipment engineered for winter performance. Cold-climate heat pumps from brands like Mitsubishi Hyper Heat, Fujitsu XLTH, Bosch IDS, and Carrier Infinity cold-climate series cost more than standard models but operate efficiently at negative 13°F and below. Equipment choice directly affects winter reliability.
Existing Heating System
- Oil-to-heat-pump conversion: Includes electrical panel upgrade, oil tank removal (or abandonment), new circuit work, and sometimes new ductwork. Typically the most expensive scenario ($12,000 – $22,000+).
- Gas-to-heat-pump: Lower secondary costs but still requires electrical work.
- All-electric to heat pump: Usually only requires new outdoor units and electrical upgrades.
- Hybrid dual-fuel: Keep the existing furnace as backup for the coldest nights. Lowest upfront cost but still requires coordination.
Home Layout & Ductwork
Capes, farmhouses, and multi-story homes with complex layouts often need custom ductwork or multiple zones. Derry’s older homes sometimes have limited attic or basement space, affecting installation labor.
Electrical Capacity
Many Derry homes have 100-amp electrical service. A heat pump typically requires 200-amp service, new circuits, disconnect switches, and possibly a subpanel. Electrical upgrades can add $2,000 – $5,000 to the project.
Rebate Eligibility
NH Saves heat pump rebates can substantially reduce out-of-pocket cost. See the rebate section below for 2026 details.
Derry Area Heat Pump Considerations: Repair vs. Replace vs. Supplement
Can a Heat Pump Replace Both Heating and Cooling?
Yes, for most Derry-area homes. A well-sized cold-climate heat pump provides both heating and cooling. Some homeowners keep an existing oil or gas furnace as a backup for the coldest 5–10 nights per year (dual-fuel strategy).
Should I Replace My Oil Furnace with a Heat Pump?
Heating oil at $4.00 – $4.50 per gallon costs $2,800 – $3,150 per year for a 700-gallon user. A cold-climate heat pump typically cuts heating costs by 40–60% on an electric-per-Btu basis. Combined with NH Saves rebates, payback often falls in the 7–12 year range.
Our recommendation is to always go with the dual fuel strategy, so you have the back up fuel option on the really cold nights. Living in New Hampshire I never recommend anyone to go fully electric heat.
Ductless vs. Ducted for Derry Homes?
- Ductless mini-split: Better for older homes without ductwork or with aging ducts. Easier to zone individual rooms. Higher per-ton cost but more flexible.
- Ducted central heat pump: Works if your existing ductwork is in good condition. Lower per-ton cost for whole-home coverage.
Many Derry homes benefit from a hybrid: ducted mini-splits in the main living area (modern addition, renovated section) plus a traditional mini-split in an older wing.
NH Saves Rebates for Heat Pump Installation in 2026
NH Saves is the statewide program that offers substantial rebates for cold-climate heat pump installations.
Standard Tier (switching from oil, gas, or propane):
- $250 per ton of installed capacity
- A typical 4-ton whole-home system qualifies for $1,000
- A 5-ton system caps at $1,250
Enhanced Tier (switching from electric resistance heat):
- $2,000 per ton for installations from March 23 through December 31, 2026 (pre-verification required)
- A 5-ton conversion qualifies for up to $10,000
- This tier is significantly more generous and requires early approval
Additional Rebates:
- Heat pump water heater: $900
- Smart thermostat (paired with qualifying heat pump): $85
Important 2026 Update:
Starting January 2026, NH Saves only rebates equipment using R-32 or R-454B refrigerant. Older R-410A systems no longer qualify. Always verify the equipment refrigerant specification before committing to a purchase.
Rebate Stack Example (Oil-to-Heat-Pump Conversion):
- Installed cost: $18,200 (4-ton ducted cold-climate system, R-454B refrigerant, HSPF2 10+)
- NH Saves Standard tier rebate: 4 tons × $250 = $1,000
- Smart thermostat rebate: $85
- Total rebates: $1,085
- Net cost: $17,115
Important Caveat: Federal tax credits (IRA Section 25C) expired December 31, 2025. Do not rely on 25C for 2026 equipment purchases. The NH Home Electrification and Appliance Rebates (HEAR) program is expected to launch mid-summer 2026 and may offer additional point-of-sale rebates for income-qualified households.
Derry Permit Requirements for Heat Pump Installation
New Hampshire requires a mechanical permit for any heat pump installation. Derry’s Building Department handles permit applications and inspections.
Derry Permit Details:
- Estimated Permit Fee: $75 – $175 (scope-dependent, higher for electrical panel upgrades)
- Typical Turnaround: 5–7 business days (longer if electrical work requires separate licensing)
- Required: Contractor license, equipment specs, refrigerant type, electrical plans (if panel upgrade)
- Inspection: Required after installation
Paul the Plumber includes permit costs in quotes and handles all paperwork. If electrical upgrades are needed, we coordinate with licensed electricians and ensure all inspections pass.
Pre-Purchase QA Checklist for Heat Pump Installation
Before signing any contract:
- Paul The Plumber has explained the system type (ducted vs. ductless) and why it fits your home
- Warranty details are clear: standard 2 years parts and labor; 3 years for Paul’s Promise Plan members
- Contractor license and insurance are verified
- Refrigerant type (R-32 or R-454B) is confirmed
- Electrical work (panel upgrade, new circuits, disconnect) is listed separately with labor and materials
- Oil tank removal or abandonment (if applicable) is included
- Start and completion dates are confirmed
- You understand the startup process: system testing, refrigerant charge verification, thermostat programming
- Follow-up maintenance plan (seasonal check, filter changes) is discussed
Frequently Asked Questions
How much does heat pump installation cost in Derry and surrounding areas?
For Paul the Plumber customers, heat pump installation typically costs between $6,500-50,000 depending on system type (ducted or ductless), home size, existing heating system, and electrical upgrades needed. Oil-to-heat-pump conversions run higher due to electrical panel work and tank removal. Ductless multi-zone systems offer flexibility. With NH Saves rebates, net cost can be substantially lower.
Do heat pumps work in Derry winters?
Yes, for most of the year. Modern cold-climate heat pumps rated to negative 13°F or lower (like Mitsubishi Hyper Heat or Fujitsu XLTH) perform reliably through Zone 5A winters. On the coldest 5–10 nights per year (below negative 13°F), homeowners may rely on backup heat (existing furnace or electric resistance strip). Equipment selection and sizing matter more than in milder climates.
Is a ductless mini-split cheaper than a ducted heat pump?
Not always. A single-zone mini-split can cost less than a whole-home ducted system, but multi-zone ductless setups (3–4 indoor heads) can total $10,000 – $18,000 before rebates. Ducted systems offer whole-home comfort at lower per-ton cost if ductwork is already in place. The best choice depends on your home layout and comfort priorities.
Can a heat pump replace both my AC and heating?
Yes. A heat pump provides both cooling in summer and heating in winter. For Derry homeowners, this means you can replace a furnace and separate AC with a single integrated system. Some choose to keep an existing oil or gas furnace as backup for the coldest nights (dual-fuel).
What is the payback period for an oil-to-heat-pump conversion in Derry?
For a homeowner burning 700 gallons of oil per year at $4.25 per gallon (annual cost: ~$2,975), a cold-climate heat pump typically cuts heating costs by 40–60%. Combined with NH Saves Standard tier rebates ($1,000–$1,250) or Enhanced tier rebates (up to $10,000 if switching from electric resistance), payback often lands in the 7–12 year range, excluding the added value of summer cooling.
What is the difference between R-410A, R-32, and R-454B refrigerants?
R-410A was the standard for many years. R-32 and R-454B are newer, lower-GWP (global warming potential) refrigerants. As of January 2026, NH Saves only rebates equipment using R-32 or R-454B. If a contractor quotes a legacy R-410A heat pump, it will not qualify for any rebate. Always confirm refrigerant type before purchasing.
Does Paul the Plumber handle electrical panel upgrades?
Yes. Many heat pump installations require 200-amp electrical service, new circuits, and disconnect work. Paul The Plumber has an electrical department that handles the full project, including permits and inspections.
Can I keep my existing oil furnace as backup?
Yes. This “dual-fuel” strategy keeps your oil furnace as a supplement for the coldest nights. The heat pump runs most of the heating season (80–90% of the time), cutting fuel costs significantly, and the furnace activates automatically during extreme cold. This is a common choice for Derry homeowners who want reliability insurance.
Schedule Your Heat Pump Installation Estimate
Paul the Plumber will assess your current heating system, home layout, electrical service, and long-term goals. We’ll explain your options—ducted, ductless, or dual-fuel—and provide a clear estimate with rebate details.
Call Paul the Plumber at (603) 437-7039
Or schedule online at paultheplumbernh.com
Monday–Friday: 7:30 AM–4:30 PM
Serving Derry, Londonderry, Windham, Hampstead, Salem, Sandown, Pelham, and surrounding Rockingham County communities.
Learn More About Your Heat Pump Options
Ductless Mini-Split Systems:
Flexible, zone-by-zone heating and cooling for older homes without central ductwork. Quieter operation, individual room control, easy installation in many Derry properties.
Ducted Central Heat Pumps:
Whole-home heating and cooling using existing ductwork. Most efficient for well-maintained duct systems. Works well in newer Derry homes or recently renovated older ones.
Dual-Fuel Heat Pump + Furnace:
Heat pump as primary (80–90% of season), oil or gas furnace as backup for extreme cold. Best for homeowners who want reliability insurance and lower upfront cost.
