New Hampshire HVAC Service Agreement (Free Template + State Notes)

What Your New Hampshire HVAC Contract Should Include

The builder formats these into a clean, professional agreement:

• Parties & Premises: Legal names, service address, site contact, access windows; attic/roof access if applicable.
• Scope of Work: Repair/replace/maintain; split/packaged systems, cold-climate heat pumps, gas/oil furnace & hydronic/boiler, mini-split/VRF, RTUs; ERV/HRV; controls/BAS.
• Service Levels: Standard vs. emergency; after-hours; snow/ice/freezing and high-wind rescheduling language (especially rooftops).
• Pricing Model: Flat-rate vs. time-and-materials; trip fee; parts handling/mark-up.
• Materials & Parts: OEM or equivalent; low-ambient/defrost kits; condensate freeze protection & overflow safeties for attic AHUs; curb adapters & hail/wind guards for RTUs; corrosion-resistant hardware for Seacoast jobs.
• Customer Responsibilities: Filters, clearances, utilities, HOA/condo approvals, roof access, snow removal for safe access.
• Warranty: Labor window; manufacturer pass-through; exclusions (misuse, neglect, freeze/wind/salt-air corrosion/water damage, non-payment).
• Code & Safety: Local permits/inspections; NH-adopted mechanical/energy provisions (IMC/IECC-based) with municipal administration; EPA refrigerant rules; rooftop fall protection.
• Change Orders: Written/e-signed authorization for hidden conditions and price changes.
• Payment Terms: Deposits/milestones; due-on-completion; late fees.
• Termination: For convenience vs. cause; cure periods; demobilization costs.
• Dispute & Venue: New Hampshire law; optional county venue (Hillsborough, Rockingham, Merrimack, Strafford, Grafton, Cheshire, Carroll, Belknap, Sullivan, Coos).
• Licensing/Registration: Show your legal business name and any applicable trade credentials/registrations on the agreement (e.g., gas fitting, oil-burner/electrical/plumbing where required by scope or locality).

New Hampshire–Specific Notes (Read Before You Sign)

Permits & inspections are local: Mechanical/electrical/gas permits are issued by the city/town AHJ (e.g., Manchester, Nashua, Concord, Derry, Rochester, Dover, Portsmouth, Keene). Confirm permit needs, plan review (rooftop units/wind), fees, and inspection timing before change-outs or installs.

Codes: Jurisdictions administer the state-adopted building/mechanical & energy codes (IMC/IECC-based) with local amendments. If your scope triggers duct leakage tests, ventilation/ERV balancing, economizers on certain RTUs, or commissioning/controls, spell out responsibilities and any testing fees in the contract.

Cold climate & Seacoast: Specify low-ambient/defrost controls, condensate freeze protection, snow/ice clearances, curb anchorage for rooftops, and stainless/galvanized hardware with protective coatings for coastal exposure (Portsmouth/Seabrook/Hampton/Rye).

Combustion fuels: For scopes involving gas/oil appliances, reference appropriate trade credentials and safety steps (leak checks, venting, make-up air, CO testing) in the scope.

Cooling-off (in-home sales): Covered door-to-door/home solicitations generally include a 3-business-day right to cancel. Attach the written notice when applicable.

Liens: New Hampshire recognizes mechanic’s lien rights with defined timelines and notices—keep clear payment terms and proof of required notices/waivers.

This page is general business guidance, not legal advice. Requirements can change—verify rules for your municipality and project type.

Example Pricing & Payment Terms (New Hampshire)

Flat-Rate Example

Flat-Rate Replacement: Contractor will replace the condenser fan motor on the 3.5-ton split system at 1 City Hall Plz, Manchester, for a fixed price of $535 plus applicable taxes/permit fees. Includes travel within 20 miles and standard disposal.

Time & Materials Example

Labor: $135/hour (first hour billable in full, then 30-min increments).
Materials: Cost + 25% handling.
Trip Fee: $75 per on-site visit (roof/elevator/crane billed if required).

Deposits & Late Fees (Sample)

• Deposit: 30% on acceptance for projects over $3,000; balance due on completion.
• Late Fee: 1.5%/month (or the maximum allowed by law) on past-due balances over 15 days.

Maintenance Plan Addendum (New Hampshire)

• Coverage: 2 tune-ups/year per covered system (spring cooling; fall heating) — optional mid-winter heat-pump performance check.
• Tasks: Coil cleaning as needed; condensate freeze-protection checks; electrical tighten; refrigerant check; burner/boiler safety checks where applicable; rooftop safety protocols; ERV/HRV filter & core inspection.
• Filters: Customer- or Contractor-supplied; sizes and intervals listed in annex.
• Priority: Plan members get priority scheduling and 10% labor discount on non-covered repairs.
• Exclusions: Non-maintenance repairs, code corrections, concealed defects, abuse, freeze/wind/corrosion/water damage unless otherwise stated.
• Term: 12 months; auto-renews unless canceled 30 days prior.

Copy-Ready Clause Examples

Trade License/Registration & Identification

Contractor is registered/licensed as required by the authority having jurisdiction for the work described. Contractor’s legal name and Registration/License No. NH-MECH/PG/OB-{{your_number}} appear on this agreement and related communications. Licensed subcontractors will be used for electrical/plumbing/gas-fitting scopes where required.

Cold-Climate, Seacoast Corrosion & Rooftop Wind

Where required by code, manufacturer, or site conditions, equipment will include low-ambient/defrost controls, condensate freeze protection, and rooftop anchorage/curb adapters with corrosion-resistant hardware suitable for coastal environments. Work may be postponed during snow/ice or high-wind events for safety.

Change Orders

No change in scope, parts, or price is valid unless authorized by a written or electronic change order signed by both parties.

Cooling-Off (If Sold In-Home)

If this agreement was solicited and signed at Customer’s residence, Customer may have a three (3) business-day right to cancel. If applicable, a separate cancellation notice is attached explaining how to cancel and where to send notice.

Dispute Resolution & Venue

This agreement is governed by the laws of the State of New Hampshire. Venue for any action lies in the county where the project is located, unless the parties agree otherwise in writing.

New Hampshire HVAC Contract — FAQs