Smart E-Loan – Option 1

If, like us, you believe it’s important to “keep it local” and you want to be considered for credit approval at Duncklee, Inc. through our local lending partner, CorePlus Federal Credit Union, you must meet their criteria for membership, as below.

CorePlus has been providing sound financial lending for over seventy five years to their Members. They have built a strong dependable reputation for great rates, and great service in Eastern

CT. As a local, community credit union, membership is open to anyone who lives, works, worships, or attends school in New London and Windham Counties and their immediate family members.

Loans are available from as low as $500, upwards to $40,000. Terms can vary from 60 months to 144 months. You may be required to furnish proof of income. And, as an added benefit, there is never a penalty for paying off the loan early!

CT Green Bank – in partnership with Energize CT and select local lenders and contractors – offers long-term, low-interest financing to help you upgrade your home’s energy performance with no money down.


*15 and 20 year terms are available, Lender participation varies.

*15 and 20 year terms are available, Lender participation varies.

Whether you are looking to improve the comfort of your home, lower your energy costs, or increase your home’s value, a Smart-E Loan makes it easy!

*APR=Annual Percentage Rate. Please note that the interest rates shown here are available to borrowers with a satisfactory credit history. Subject to other terms and conditions. Other restrictions may apply.

Ask any Duncklee, Inc. staff member to help you get started with your application today! If you have any questions, you can click here to contact us or visit

When filling out the CorePlus Credit Union Smart-E Loan, please make sure to select Loan Type “Personal Loan”

In the note section of the loan application please state you are working with Duncklee Cooling & Heating

Energize CT – Option 2

What is the Energize CT Heat Loan Program?

0.99% APR and up to $15,000 Financing for new Energy Efficiency Heating Systems –

If you are a residential customer of Eversource or The United Illuminating Company (UI), you may be eligible for a low-interest loan to purchase and install an energy efficient heating system.

  • Loan installment payments will be billed conveniently on your monthly electric bill
  • Loan amount of up to $15,000
  • 0.99% APR financing For Residential Heating Equipment Upgrades or Conversions for the life of the loan
  • Low monthly payments on loan terms from 3 to 10 years which will result in a monthly payment equal to or less than your projected monthly energy savings
  • Up to 90% of the heating system equipment and installation may be financed depending on projected energy savings – the greater the savings, the lower the down payment

Your monthly payment and down payment required will be based on the projected energy savings of the proposed heating system. Your annual energy savings will be calculated in accordance with the current Connecticut Program Savings Documents (PSD) for the list of qualified measures below:

Meets or exceeds specifications listed below as verified by

1) AHRI certificate

  • Oil Boilers
    • AFUE ≥ 87.00%
  • Oil Furnaces
    • AFUE ≥ 85.00%
  • Natural Gas or Propane Boiler
    • ENERGY STAR certified 95% AFUE or greater and AHRI Rated with boiler reset control
  • Natural Gas or Propane Furnace
    • ENERGY STAR certified 95% AFUE or greater and AHRI Rated with ECM air handler motor
  • Natural Gas Steam Boiler
    • AFUE ≥ 82.00%
  • Air Source Heat Pumps
    • Centrally-Ducted: ≥16 SEER, ≥9.5 HSPF, 60% Heating Capacity Ratio (17º F/47º F), and AHRI rated
    • Ducted and/or Ductless Multi-Zone: ≥16 SEER, ≥9.5 HSPF, 58% Heating Capacity Ratio (17º F/47º F), and AHRI rated
    • Ductless Single-Zone: ≥18 SEER, ≥10 HSPF, 58% Heating Capacity Ratio (17º F/47º F), and AHRI rated
  • Ground Source (Geothermal) Heat Pumps
    • Closed Loop Water to Air: 17.1 EER, 3.6 COP, and ENERGY STAR certified
    • Direct Expansion Refrigerant: 16 EER, 3.6 COP, and ENERGY STAR certified
    • Water to Water: 16.1 EER, 3.1 COP, and ENERGY STAR certified
    • ENERGY STAR ratings are the average of high/low speed on 2 systems
  • Propane Tanks (purchase only)

Who is Eligible?

  • Applicant must own the property
  • Residential rate customers of participating utilities
  • Applicant must have their electric account with Eversource or United Illuminating
  • The primary borrower must be the property owner AND be listed on the electric account.
  • Applicants must be current on their electric utility bill and have had either
    • no late payments for the most recent 6 consecutive months; or
    • no more than 2 late payments for the last 12 consecutive months
  • There are no other credit qualifications required, we will not be inquiring about your credit score

How to Apply For Energize CT Loan

Get an Estimate
You can get a estimate today by filling out our contact form by clicking here or contact us via phone by calling one of our locations that is closest to you! See our locations below.

(860) 536-2552 Mystic, CT
(860) 535-2552 Stonington, CT
(860) 447-8484 New London, CT
(860) 388-5001 Old Saybrook, CT
(860) 886-5000 Norwich, CT
(401) 596-6655 Westerly, RI

Fast Approval
Mobile-friendly, web-based tools allow your contractor to instantly quote your monthly payment and down payment based on projected energy savings of the proposed heating system. Fast and easy approval based on program guidelines and verification of electric utility bill payment history. You may apply online or by calling 1.800.992.3665.

Installation and Payment to Contractor
Your contractor sends us a copy of their estimate/proposal and Contractor Submission Sheet identifying final price and qualifying improvements. We provide you with a few simple documents to sign. We pay the contractor upon receipt of a signed Completion Certificate and verbal confirmation from you, the customer, that the work has been done to your satisfaction.