Colorado HVAC Service Agreement (Free Template + State Notes)

What Your Colorado 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 where applicable.
• Scope of Work: Repair/replace/maintain; systems covered (split/packaged, heat pumps including cold-climate, gas furnace/boiler & hydronic, mini-split, RTUs; ERV/HRV; controls).
• Service Levels: Standard vs. emergency response; after-hours rates; freeze events, snow, lightning, and high-wind rescheduling language.
• Pricing Model: Flat-rate vs. time-and-materials; trip fee policy; parts handling/mark-up.
• Materials & Parts: OEM vs. equivalent; high-altitude orifice/derating notes; low-ambient/defrost controls for heat pumps; condensate freeze protection; hail guards for exposed coils.
• Customer Responsibilities: Filters, clearances, utilities, HOA/roof access, keeping pathways clear of snow/ice for safe work.
• Warranty: Labor window; manufacturer pass-through; exclusions (misuse, neglect, freeze damage, smoke/soot, corrosion, non-payment).
• Code & Safety: Local permits/inspections; IMC/IECC-based adoption with municipal amendments; EPA refrigerant rules; rooftop fall protection; combustion air and makeup air at altitude.
• 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: Colorado law; optional county venue (Denver, El Paso, Boulder, Arapahoe, Jefferson, Larimer, etc.).
• Licensing Info: Legal business name and any required municipal mechanical/HVAC contractor registration numbers printed on the agreement; state-licensed subs for electrical/plumbing scopes where applicable.

Colorado-Specific Notes (Read Before You Sign)

Licensing/registration: Colorado does not have one universal statewide HVAC contractor license; many jurisdictions issue their own mechanical/HVAC contractor registrations. Electrical and plumbing work is state-licensed. List your legal business name and any required city registration numbers (e.g., Denver, Boulder, Colorado Springs) on proposals and the contract.

Permits & inspections are local: Mechanical/electrical/gas permits are issued by the city/county AHJ (e.g., Denver, Aurora, Colorado Springs, Fort Collins, Lakewood, Boulder). Confirm permit needs, fees, plan review, and inspection timing before change-outs or new installs.

Energy/mechanical codes: Municipalities adopt IMC/IECC (and IRC for residential) with local amendments. If your scope triggers duct sealing/leakage testing, ventilation/HRV balancing, economizers on certain RTUs, or commissioning, reflect responsibilities and testing fees in the contract.

Altitude & combustion air: At elevation, many gas appliances require derating and adjusted combustion air. Note any orifice/pressure adjustments and verification responsibilities; coordinate with the AHJ where required.

Climate considerations: Include freeze protection for condensate and piping, hail-guard language for exposed coils, and wildfire smoke/poor AQ mitigation (filter upgrades, MERV recommendations, service call limits during hazardous AQI).

Cooling-off (in-home sales): For covered door-to-door/home solicitations, customers generally have a 3-business-day right to cancel. Attach the written notice when applicable.

Liens: Colorado recognizes mechanic’s lien rights with specific timeframes and notice steps. Keep clear payment terms and retain proof of notices/waivers as your workflow requires.

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

Example Pricing & Payment Terms (Colorado)

Flat-Rate Example

Flat-Rate Replacement: Contractor will replace the condenser fan motor on the 4-ton split system at 1701 Wynkoop St, Denver, 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 access fee may apply where 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 (Colorado)

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

Copy-Ready Clause Examples

Contractor Identification & Registration

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

Altitude/Combustion Air & Freeze Protection

Where required by code, manufacturer, or site conditions, equipment will be adjusted for altitude (e.g., orifice/pressure), provided with adequate combustion and makeup air, and protected against freezing (including condensate piping and pans).

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 Colorado. Venue for any action lies in the county where the project is located, unless the parties agree otherwise in writing.

Colorado HVAC Contract — FAQs