Calnan’s Energy Systems, Inc.

Calnan's Energy Systems, Inc. operates as an insulation contractor serving Waltham, Massachusetts, and holds a 4.8-star rating across 26 client reviews. The company focuses on residential insulation solutions, addressing air leakage, crawl space gaps, and energy efficiency in homes throughout the greater Waltham area. Reviewers consistently note the team's attention to detail and thorough approach to diagnosing insulation problems that other contractors overlooked.

What distinguishes this contractor is their willingness to coordinate with other trades on complex projects. One reviewer described how Rob managed an insulation job on a 70-year-old house while simultaneously working with roofers, HVAC teams, and cleaning crews. Another client mentioned the contractor identified air gaps in a crawl space that were causing noticeable drafts in an upstairs sunroom during winter months. The company appears to prioritize long-term solutions over quick fixes, with multiple reviewers noting recommendations against unnecessary work.

Reviewers frequently mention Rob by name, describing him as someone who provides honest assessments and explains why specific recommendations serve the client's best interest. One client recounted receiving a quote they considered high, then accepting Rob's suggestion to follow the original recommendation after experiencing the draft problems he predicted. The team has handled insulation projects on homes ranging from 70 to 95 years old, with reviewers noting the owner maintains a daily on-site presence. Another reviewer described the crew returning to address issues that emerged after the initial work, communicating clearly throughout the process.