Connecticut Geothermal
77 verified programs, updated 2026-08-08. 3 incentive types.
Sales and Use Tax Exemption for Solar and Geothermal Systems
Sales Tax IncentiveSeptember 26, 2025
100% exemption
(Electric and Gas) Residential New Construction Program
Rebate ProgramUtility, Residential, Multifamily ResidentialMay 29, 2024
Tier 1 (HERS Index of 51-60) Multifamily: $1,500 Single Family Attached: $3,000 Single Family: $7,500 Tier 2 (HERS Index of 41-50) Multifamily: $2,500 Single Family Attached: $4,000 Single Family: $10,000 Tier 3 (HERS Index of 40 and below) Multifamily: $3,500 Single Family Attached: $5,000 Single Family: $12,500 Air-Source Heat Pump: Multifamily: $75/ton (Up to $300) Single Family Attached: $125/ton (Up to $500) Single Family: $125/ton (Up to $500) Ground Source Heat Pump Multifamily: $125/ton (Up to $500) Single Family Attached: $250/unit (Up to $1,000) Single Family: $250/unit (Up to $1,000) Bonus Rebates Multifamily: $250 - $1,500 Single Family Attached: $250 - $1,500 Single Family: $500 - $1,000
Energize Connecticut Residential and Commercial Rebates
Rebate ProgramUtility, Commercial, Multifamily ResidentialAugust 19, 2024
Advanced Duct Sealing: Up to $1,750 Residential Advanced Power Strips: Up to $40 Residential Boiler Circulator Pump: $35 C&I Prescriptive Weatherization Attic Insulation: $0.035/sq. ft. Wall Insulation: $0.145/sq. ft. Air Sealing: $80/hour Commercial Air Conditioner: Up to $150/ton Commercial Air Purifier: Up to $40/unit Commercial Air Source Heat Pump: $1,500/ton Commercial Broiler: Up to $3,000/unit Commercial Clothes Washer: Up to $200/unit Commercial Dishwasher: Up to $250/unit Commercial Electric Ice Machine: Up to $300/unit Commercial Fryer: Up to $900/unit Commercial Gas Condensing Storage Water Heater: $8/input MBH Commercial Natural Gas Condensing Water Heater: $8/Input MBH Commercial Griddles: Up to $650/unit Commercial Ground Source Heat Pump: Up to $4,000 Commercial Heat Pump Water Heater: Up to $1,400 Commercial Hot Food Holding Cabinet: Up to $750/unit Commercial Induction Cooktop: Up to $500/unit Commercial Lab Equipment: Up to $2,000/unit Commercial Natural Gas Boiler: $5/ MBH Commercial On Demand Wrapping Machine: Up to $125/unit Commercial Ovens & Range: Up to $4,000/unit Commercial Refrigerated Chef Bases: Up to $500 Commercial Refrigerators and Freezer: Up to $300/refrigerator and $250/freezer Commercial Steamers: $2,000/unit Commercial Tankless Gas Water Heater: $5/Input MBH Commercial Thermostat: $85/unit Commercial Vending Misers: Up to $75/unit Commercial Variable Refrigerant Flow Heat Pump: Up to $2,100/ton Commercial Natural Gas Infrared Heater Incentive: Up to $850/unit Residential Pool Pumps: Up to $100/unit Residential Air Purifiers: Up to $40 Residential Air Source Heat Pump: $750/ton Residential Gas Condensing Water Heater: $300 instant discount Residential Ground Source Heat Pump: $1,500/ton Residential Heat Pump Water Heater: $650 Residential Insulation: Up to $1.70 per square foot Residential Natural Gas Boiler: $750 Residential Natural Gas Furnace: $650 Residential Tankless Gas Water Heater: $300 instant discount Residential Thermostat: Up to $85 Residential Triple Pane Window: $100/window
(Electric and Gas) Residential Rebate Program
Rebate ProgramUtility, ResidentialMay 30, 2024
Heat Pumps Air Source Heat Pumps: $750/ton (Up to $15,000) Geothermal Heat Pumps: $1,500 (Up to $15,000) Pool Pump: Up to $100 Other HVAC Boiler Circulator Pump: $35 Programmable Thermostat: Up to $85 Natural Gas (NG) Boiler: $750 NG Furnace: $650 Water Heating Heat Pump Water Heater: $650/ Gas Condensing Water Heater: $300 Tankless Water Heater: Up to $300 Home Comfort Advanced Power Strip: Up to $40 Air Purifier: Up to $40 Ducting Sealing: $350 - $1,750 Insulation: Up to $1.70/sq.ft. (Up to $10,000) Windows: $100/unit Triple-Pane Window: $100 Lighting: Varies, contact program admin. Appliances: Varies, contact program admin.
Home Energy Solutions Micro-Loan Program
Loan ProgramConstruction, Residential, Multifamily ResidentialJuly 3, 2025
Up to $5000
Multifamily Navigator Pre-Development Energy Loan Program
Loan ProgramMultifamily ResidentialAugust 5, 2025
Up to $999999.9999
Low-Income Multifamily Energy Loan Program
Loan ProgramMultifamily ResidentialAugust 5, 2025
Up to 20 Years