Serving Crystal Lake, IL and surrounding areas
Angi Approved
In business since 2005
Free estimates
Emergency services offered
"Josh was very professional throughout the installation process and ensured my tenant on-site understood the basics. In addition, Josh sent Miguel the same day to ensure the humidifier was working properly."
+61
Serving Crystal Lake, IL and surrounding areas
Angi Approved
In business since 2003
Free estimates
Emergency services offered
"Service was prompt, professional and well done."
Serving Crystal Lake, IL and surrounding areas
Angi Approved
In business since 1904
Free estimates
Emergency services offered
"The technician arrived precisely on schedule and performed a thorough checkup of the heating system, using state-of-the-art diagnostic tools. He also explained the condition of the furnace and helpfully forecasted its likely future."
Serving Crystal Lake, IL and surrounding areas
Angi Approved
In business since 1971
Free estimates
Emergency services offered
"They are opportunist and unethical."
Serving Crystal Lake, IL and surrounding areas
Angi Approved
Super Service Award Winner
Free estimates
Emergency services offered
Warranties offered
"I had a great experience with their HVAC services. They repaired my electrical baseboard heater quickly and made sure everything was working perfectly before leaving. The team was professional, punctual, and very knowledgeable. They also installed our new central A/C system smoothly with no issues at all. Communication was clear throughout the process, and the pricing was fair. Highly satisfied with the quality of work and customer service. I would definitely recommend them for any heating or cooling needs."
+20
Serving Crystal Lake, IL and surrounding areas
Angi Approved
In business since 2024
Credit card accepted
Offers commercial services
"I was happy with the service. They were efficient and professional. I would hire them again. I highly recommend "
Serving Crystal Lake, IL and surrounding areas
Angi Approved
In business since 2006
Free estimates
Credit card accepted
"Very nice to work with and did a great job!"
Serving Crystal Lake, IL and surrounding areas
Angi Approved
Free estimates
Emergency services offered
Warranties offered
"It was excellent. They did a great job. It was cool and nice. The price was good. I was totally happy with the work. They cleaned up their mess."
+19
Serving Crystal Lake, IL and surrounding areas
Angi Approved
Warranties offered
Small jobs welcome
Offers commercial services
Semper Fidelis Services brings military-grade discipline to HVAC and plumbing. Founded on the principle of being "Always Faithful" our team offers 10+ years of technical experience, including an AAS in HVAC/R and Universal EPA certification. We specialize in high-quality, reliable residential and commercial services with a strict commitment to doing the job right the first time.
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