HVAC Services in Derry, NH
Trusted HVAC Services for Homes and Businesses in Derry.
Custom Climates installs and services heating and cooling systems throughout Derry, NH — Mitsubishi cold-climate heat pumps, oil-to-gas boiler conversions, furnaces, central air, and water heaters for homes and businesses. Free quotes, financing options, and 24/7 emergency service.
Derry is one of our most active install towns — recent completed work includes an oil-to-gas combi boiler conversion and a three-zone Mitsubishi ductless system, alongside furnace, cooling, and service calls across town. From the historic roads around Robert Frost’s farm to the busy neighborhoods of New Hampshire’s fourth-largest community, every system is tailored to the property — never one-size-fits-all.
Call (603) 262-1623 or request a free quote online — we answer 24/7 for emergencies.
Residential HVAC Services in Derry
We help homeowners in Derry maintain comfortable, efficient homes year-round with services that include:
Heat Pump Installation & Repair
Energy-efficient heating and cooling designed for New Hampshire weather
Ductless Mini Split Systems
Zoned comfort solutions for targeted temperature control and lower energy use
Air Conditioning Installation & Service
Reliable cooling systems built for summer humidity and best performance
Furnace Installation & Repair
Dependable heating systems for long, cold winters
Boiler Service & Hydronic Heating
Installation, repair, and maintenance for hot water and radiant heating systems
Ventilation & Indoor Air Quality Solutions
ERVs, HRVs, filtration, and humidity control for healthier indoor air
Commercial HVAC Services in Derry
We install, service, and maintain heating and cooling systems for Derry businesses, property managers, and facility operators — offices, retail, and light commercial buildings. From system assessments and replacements to preventative maintenance contracts, we keep equipment running through peak season.
See our full commercial service overview or call (603) 262-1623 to talk through your building.
Commercial HVAC Solutions in Derry
We work with businesses, property managers, and facility operators throughout Derry to deliver dependable, commercial-grade HVAC solutions:
Commercial Heating & Cooling Systems
Installation and service for offices, retail, and light commercial buildings
Commercial Heat Pump Systems
Energy-efficient options for lower operating costs
Zoned & Multi-Area HVAC Designs
Solutions for buildings with varying comfort demands
Preventative Maintenance Contracts
Scheduled service plans focused on uptime and reliability
Emergency HVAC Repair
Responsive service for critical system failures
System Assessments & Upgrades
Evaluation and replacement of aging equipment to improve efficiency and performance
Why Property Owners in Derry Choose Custom Climates
Derry homeowners keep calling us for straightforward reasons — honest recommendations, systems sized to the building, and technicians who show up when scheduled.
We also serve nearby Salem, Londonderry, and Merrimack, plus 60+ towns across Southern New Hampshire.
Heating in Derry: Oil Conversions, Heat Pumps, and Cold Winters
Many older Derry homes still heat with oil equipment that’s expensive to run. Two upgrades we complete regularly in town: replacing aging oil boilers with high-efficiency wall-hung gas units that handle heating and hot water from one system, and installing Mitsubishi cold-climate heat pumps — built to keep heating at outdoor temperatures as low as −13°F. For homes keeping a boiler or furnace, we service and replace those too.
See furnace and boiler services or financing options for larger installs.
Recent Heating & Cooling Projects in Derry
Six completed jobs logged in Derry since December — boiler conversions, multi-zone heat pumps, and equipment replacements across town. A few examples:
Oil-to-Gas Boiler Conversion — Derry (winter 2025–26)
We removed an aging oil-fired boiler and installed a high-efficiency wall-hung unit that handles heating and domestic hot water from a single system. The job included new zoned circulator piping, a new gas line, and removal of the old exterior oil piping — wrapped up in January after a December start.
Three-Zone Mitsubishi Ductless System — Derry (spring 2026)
One Mitsubishi outdoor condenser feeding three zones — an indoor unit in the main living space and one in each of two bedrooms — giving the homeowners room-by-room heating and cooling without ductwork. Completed in May 2026.
Curious what a system like this would cost for your home? Request a free quote or call (603) 262-1623.
Schedule HVAC Service in Derry
If you’re dealing with comfort issues, rising energy costs, an aging system, or unexpected breakdowns, Custom Climates is here to help.
Call us for service or emergency assistance.
Request a consultation
Ask about maintenance plans for year-round reliability
Inquire about commercial service contracts and preventative maintenance. We look forward to helping you maintain reliable, efficient comfort in Derry, NH.
