Is this your business?
Verify your details, earn a verified badge, and start getting customer inquiries. Takes about a minute by phone.
Claim This Business FreeClaiming is free. Featured placement is optional, $99/mo.
About Loos & Sons HVAC LLC
Loos & Sons HVAC LLC operates as a residential heating and cooling specialist serving Boulder, Colorado, and surrounding communities. With a clean 5-star rating across forty-eight client reviews, the company has built a reputation for honest assessments and thorough diagnostics. Customers in the Boulder area describe the team as knowledgeable, punctual, and transparent about pricing throughout service appointments.
The contractor distinguishes itself through specialization in geothermal heating systems, a niche expertise that several reviewers specifically noted as rare among regional HVAC providers. This technical depth extends across heat pump installations, furnace repairs, and annual maintenance programs designed for Colorado's demanding seasonal temperature swings.
Customer accounts highlight specific service scenarios including same-day emergency boiler repairs arranged for property showings and comprehensive system evaluations where technicians walked homeowners through each diagnostic step. One reviewer described a situation where the team arrived at 7am to address a flooding basement boiler before a scheduled home showing. Another account mentioned the technician cleaned a neglected humidifier component during a routine furnace tune-up, going beyond the standard service scope.
What Customers Say
Forty-eight reviews form a unanimous five-star collection, with geothermal expertise and transparent pricing cited across multiple testimonials. Several reviews specifically mention emergency response capability and same-day availability.
Services
Furnace Repair & Maintenance
Annual tune-ups, igniter replacement, flame sensor cleaning, and pressure switch diagnostics to restore heating function.
Boiler Emergency Repair
Same-day response for leaking or malfunctioning boilers, with reviewer accounts of weekend emergency availability.
Heat Pump Service
Installation and repair for residential heat pump systems, with one reviewer specifically praising heat pump expertise.
Geothermal System Expertise
Specialized knowledge in geothermal heating and cooling systems, a noted competency distinguishing this contractor.
AC Repair & Maintenance
Cooling system diagnostics and annual maintenance to ensure summer performance reliability.
Humidifier Cleaning & Service
Reviewer account confirms humidifier cleaning and inspection during furnace maintenance visits.