Caswell & Son Corporation

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Our Services

Residential Services

Heating Systems
We understand that no other single system in your home plays a larger role in your comfort or how much your utility bill will be than your heating system. That's why we specialize in comfortable, cost-effective heating solutions, including furnaces, boilers, and heat pumps. We also provide annual maintenance agreements and assess your heating system to evaluate its energy-efficiency.

Air Conditioning
We can help you maintain and repair the system you have, or replace it completely. As factory-trained technicians, we can provide routine periodic inspections, licensed warranty and post-warranty repairs, and immediate emergency response.

Air Quality
Indoor air pollution can actually be worse for you than outdoor pollution! We can help supply and install air purifiers and humidifiers, and offer custom duct system design and installation.  We also perform indoor air quality testing. 

Commercial Services

Operations and Maintenance
We provide full-service maintenance, with dedicated staff to ensure on-going system maintenance and quick repair.

Installation
We provide full and partial HVAC system replacement, as well as brand new ground-up installations.

Systems Design and Project Management
We specialize in retrofitting older buildings with new heating and cooling systems. We’ll also take on the installation of systems in new buildings from the ground up.

Advanced Technology & Efficiency

You can get 30% energy efficiency savings in offices up to 20,000 feet with new HVAC systems. Ask us about the latest technology for your particular needs.

Lakes Region Counties in NH including:

  • Belknap
  • Merrimac
  • Carroll
  • Grafton