Home - 4Therm Mechanical, Inc.

Reliable Heating, Cooling & Plumbing — Done Right the First Time

Local, licensed, and insured services for homeowners across Longmont and surrounding communities. With over 10 years of experience, 4Therm focuses on honest repairs, clear communication, and solutions you actually need — not unnecessary upsells.

Heating & Cooling Services

We keep your home comfortable year-round.

Plumbing Services

Reliable plumbing solutions to keep your home running smoothly.

Why Homeowners Choose 4Therm

Repair-First Approach
We prioritize fixing your equipment whenever possible — no pressure to replace systems that still have life left in them.
Over 10 Years of Experience
Hands-on experience across heating, cooling, and plumbing systems in Colorado homes.
Licensed & Insured
Professional, compliant, and done right — for your peace of mind.
Local, Friendly Service
We live and work in the same communities we serve.
Flexible Scheduling
Available outside of standard business hours when needed.

Our Service Area

Proudly serving homeowners in:
Longmont, Loveland, Johnstown, Firestone, Frederick, Mead, Berthoud, Platteville, and surrounding areas.

If you’re nearby, chances are we can help — just ask.