Caswell & Son Corporation

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We take pride in the work that we do and it shows on every job. We're Caswell & Son Corporation, and we're here to help with the heating and cooling systems in your home or office. We have been providing quality services for over sixty years. We offer 24 hour emergency service to ensure peace of mind for our customers.

Our Service, Repair and Installation Include:

  • Heating
  • Air Conditioning
  • Ventilation
  • Installations
  • Custom Sheet Metal Fabrication
  • Radiant infloor heat systems
  • High-efficiency gas and oil boiler systems
  • On demand hot water heaters
  • Gas fireplaces, Log inserts & Hearth stoves
  • Split ductless air conditioners and Heat pumps
  • Duel fuel "hybrid" heating systems
  • Air filtration and Air quality tests
  • Whole home humidification and dehumidification

Why Caswell & Sons?

  • Comfort Club Maintenance Agreements
  • New Hampshire state licensed gas pipe technicians
  • Owens Corning AttiCat Expanding Blown in Insulation
  • Lennox Dealers

Service In the event that your equipment needs servicing, you have peace of mind knowing we're only a phone call away. We offer emergency service and free estimates.

Installation We can install or design any type of heating or cooling system required in your home or light commercial building. We install high-efficiency comfort systems designed to be the most cost-effective on the market and geared to your particular property.

Advanced Technology and 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.

Prevention To save on utility bills and service calls, we urge you to take a preventive approach to heating and cooling. All of your heating and cooling systems should be included in a regular inspection and maintenance.

Whether you own a commercial or residential building, whether you need installation or service, our goal is to provide you with key environmental systems expertise. You should be at ease and in control — a feeling of confidence and comfort that we are happy to help you establish and maintain.

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