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Claim This BusinessDiBacco Plumbing, Heating & Cooling has anchored its presence in Nashua since 1993, amassing 58 verified reviews that converge on a 4.9-star average, this cluster of feedback signals consistency over decades rather than a flash-in-the-pan reputation. The company operates as a family-owned entity alongside brother shops in Chelmsford and surrounding New Hampshire communities, fielding a licensed and insured crew that manages furnace installations, boiler replacements, AC tune-ups, and whole-home generator setups. Their office hours run Monday through Friday from 8:30 AM to 5 PM, with Saturday and Sunday designated for emergency call-ups when systems fail catastrophically.
What distinguishes DiBacco from regional competitors is their hands-on involvement with utility rebate programs, specifically the Mass Save process for heat-pump and water-heater upgrades, which opens 0% financing pathways that most independent contractors merely mention but fail to execute. They also handle piping diagnostics and repiping projects that require coordinating with municipal inspectors in Chelmsford, a step often skipped by fly-by-night operators. Their website explicitly lists Lennox, Carrier, and Mitsubishi equipment tiers, giving homeowners a clear brand pathway rather than generic equipment promises.
Reviewer Stephanie DesMarais credits technicians Ralph, Michael, Lesco, and Kyle with arriving the day after her furnace and AC system failed simultaneously, completing a full install before temperatures dipped again, with vent sealing thrown in at no additional cost. Deborah R's review names Ralph again, noting he replaced her hot water heater, scheduled the municipal inspection personally, andconfirmed all work met code requirements. Dean A specifically praises their rebate-tracking approach, while M Arella highlights a Monday-morning arrival after a weekend boiler failure, leveraging Mass Save financing to install a tankless gas system within two business days.
Four named customers, Stephanie, Deborah, Dean, and M Arella, all award 5 stars, with three explicitly naming technician Ralph for his code compliance rigor and scheduling follow-through. The word 'reasonable' appears in Dean's pricing praise, while Stephanie's account details same-day diagnostic arrival and vent-sealing upgrades at no extra charge.
| Sunday | Closed |
| Monday | 8:30 AM–5 PM |
| Tuesday | 8:30 AM–5 PM |
| Wednesday | 8:30 AM–5 PM |
| ThursdayToday | 8:30 AM–5 PM |
| Friday | 8:30 AM–5 PM |
| Saturday | Closed |
Replacement and maintenance for aging furnace systems, including next-day install options for emergency failures.
Boiler repairs, tankless gas installations, and ductless mini-split heat pump setups with Mass Save rebates.
AC repair, installation, and replacement for residential systems, includingdiagnostics and refrigerant handling.
Piping diagnostics, water line repairs, and full repiping projects for aging residential plumbing.
Water heater replacement, reviewers note tankless gas installations and inspector scheduling.
Electrical generator installation for backup power during outages.
Whole-house water treatment and filtration for improved water quality.