What if you could heat and cool your entire home - and never worry about rate hikes again?
Most Connecticut homeowners are overpaying their utility company every single month - and they don't even realize there's a way out. The Keen Heat Pump, installed by CellSun Home, changes that - with Energize CT rebates and CT Green Bank Smart-E financing at 1.99% APR for 5 years on qualifying projects through December 31, 2026.
Be honest with yourself for a moment: How much did you spend on heating and cooling last year?
Most homeowners we sit down with are shocked when they add it up. Between rising electric rates, aging furnaces, and window AC units running all summer - the number is usually much higher than they expected. And here's the uncomfortable part: next year, it's going to be even more.
Sound Familiar?
These Are the Problems Nobody Else Will Talk to You About
Other HVAC companies want to sell you equipment. We'd rather help you understand what's actually costing you money - and why.
You're Being Forced to Pay Rate Hikes
Connecticut has some of the highest electricity rates in the country - and they keep climbing. Every year you wait, you're choosing to pay more.
Your System Can't Keep Up
Freezing in January. Sweating in July. That one room that's always the wrong temperature. It's not just uncomfortable - it's costing you in wasted energy.
Two Systems. Twice the Headache.
A furnace for winter. An AC for summer. Two maintenance schedules, two sets of repairs, two potential failures you shouldn't have to deal with.
You're Burning Fossil Fuels On-Site
If you have a gas or oil furnace, you're combusting fuel inside your home. Beyond the environmental impact, you're tethered to volatile fuel prices.
The Keen Heat Pump
One System. Year-Round Comfort. Engineered for Connecticut.
What if instead of two aging systems fighting against New England weather, you had one all-electric system that heats in winter, cools in summer, and dramatically lowers your energy bills?
- Replaces both your furnace and air conditioner with one unit
- Moves heat instead of generating it - up to 500% more efficient
- 100% electric - no gas, no oil, no combustion in your home
- Whisper-quiet operation even in bedrooms and living spaces
- Mix & match ducted, ductless, wall, floor, and ceiling units
- Qualifies for Energize CT rebates + CT Green Bank Smart-E financing
What happens if you don't do anything?
Let's look at what staying with your current system actually costs you. Not someday. Right now.
$2,400+
Avg. Annual Heating/Cooling Cost
For CT homeowners on old systems
4–6%
Annual Rate Hike (Avg.)
That compounds every single year
$30K+
10-Year Cost of Doing Nothing
Money you'll never get back
Every month you wait, you're choosing to keep writing bigger checks to your utility company. The question isn't whether you can afford to switch - it's whether you can afford not to.
Side by Side
Keen Heat Pump vs. Your Current System
We believe in honest information - not sales pitches. Here's what the switch actually looks like.
| Feature | Traditional | Keen Heat Pump |
|---|---|---|
| Heating & Cooling | Two separate systems | One all-electric system |
| Energy Efficiency | 80–98% (gas furnace) | 300–500% (moves heat) |
| Fuel Source | Gas, oil, propane + electric | 100% electric - zero combustion |
| Cold Climate | Furnace works; AC off in winter | Heats efficiently below freezing |
| Zone Control | Single thermostat / limited | Room-by-room comfort |
| Noise Level | Furnace blower + compressor | Whisper-quiet operation |
| Incentives | Limited | Energize CT rebates + Smart-E Loan |
| Emissions | Burns fossil fuels on-site | Zero on-site emissions |
| Financing | Standard rates (6–12%+) | 1.99% Smart-E Loan, $0 down |
Where KEEN Sits in the CellSun Lineup
CellSun installs three heat pump lines. KEEN is the one we reach for most, and it is worth saying plainly why.
Gree costs less and, for a home with good ductwork and a dying oil furnace, it is often the right answer. Mitsubishi Hyper-Heating goes colder and quieter, and for a 1920s house with no ducts and a bedroom that has never been warm, nothing else comes close.
KEEN sits in the middle because of what wraps around it. It is the line CellSun monitors, which means we can often see a system drifting out of spec before you notice the house is not holding temperature. It is the line the Comfort Plan is built around. And it is the line we size and commission with solar in mind, because a heat pump moves your heating onto your electric bill and that is only a win if the electric bill is covered.
If your project is a heat pump and nothing else, ask us to price all three. If your project is a heat pump and solar together, this is the one.
Energize CT pays $1,500 per ton
Connecticut's residential Energy Optimization incentive pays $1,500 per ton, up to $10,000 in combined incentives, at the rate in effect September 1 through December 31, 2026. The rate was $1,000 per ton from January through August and moved up on September 1. CellSun participates in the Energize Connecticut Heat Pump Installer Network and applies the rebate at install.
CT Green Bank Smart-E Loan
1.99% APR Heat Pump Financing. $0 Down. No Catch.
August 1 through December 31, 2026, the Connecticut Green Bank Smart-E Loan offers 1.99% fixed APR on 5-year loans up to $25,000 for qualifying heat pump projects. No money down, no prepayment penalties, available to qualified Connecticut homeowners. A blended rate applies to loans over $25,000 (maximum $50,000) or projects including non-heat pump measures.
5 yr
Promo Term
1.99% APR (5-year term only)
1.99%
Interest Rate
Fixed APR through 12/31/2026
$25K
Max Loan
Special offer amount
$0
Down Payment
No prepayment penalties
Eligibility Requirements
- Connecticut homeowners
- Eversource or Avangrid (United Illumination) electricity customer
- Approved for an EnergizeCT Heat Pump Rebate
- Air source heat pumps, mini splits, geothermal, heat pump water heaters
- Equipment on the Energize CT Heat Pump Qualified Product List
- Full displacement of the existing heating system for the full rate. Partial displacement is a separate path requiring qualified integrated controls.
- Post installation inspections are random and mandatory. Failing to complete one forfeits the rebate.
The Home Electrification Experts
Why Connecticut Homeowners Trust CellSun Home
We're not a call center. We're not a national chain. We're your neighbors in Glastonbury - and we treat every home like our own.
20+ Years in the Industry
With over 4 million watts sold and a $30M operation managed, our team brings deep, proven expertise to every project.
Education-First. No Pressure.
We don't knock on doors. We don't hard-sell. We educate you honestly - and if it doesn't make sense, we'll be the ones to tell you.
30/40-Year Labor Warranty in CT
No other Connecticut installer offers this level of labor coverage on all components - directly from us, not through a third party.
Solar, Roofing & HVAC - One Team
Heat pumps, premium solar, roof replacements - all handled under one roof. No juggling contractors.
Quality Over Quotas
Unlike high-volume installers chasing sales targets, we're a boutique operation focused on premium solutions tailored to your home.
Central Connecticut Focus
We live and work in the Greater Hartford area - Glastonbury, West Hartford, Manchester, South Windsor, and beyond.
Your Path to Comfort
Three Simple Steps. We Handle the Rest.
You have enough on your plate. Here's exactly how the process works - no surprises, no runaround.
Free Consultation
We sit down together, review your energy usage, evaluate your home, and give you honest answers about whether a Keen Heat Pump makes sense for you. No pressure. No obligation.
Custom Design + Financing
We design the right Keen configuration for your home and walk you through the Smart-E Loan and available rebates. You'll know exactly what you're paying before you commit.
White-Glove Installation
Our team handles everything - permits, installation (typically one day), and system activation. Then we make sure you're comfortable with how everything works.
Real Homeowners. Real Results.
What Our Clients Actually Say
"The education and understanding they provided was unlike any other company. They let the technology speak for itself - no pressure, no gimmicks."
Verified CT Homeowner
EnergySage
"In stark contrast to other companies that sell aggressively, CellSun answered every question with expertise that made me feel informed as a customer. The whole process was very smooth."
Verified CT Homeowner
EnergySage
"They truly listened to my needs and helped me get a system within my budget. Took care of absolutely everything and showed remarkable patience while I finalized financing."
Verified CT Homeowner
EnergySage
Honest Answers
The Questions You're Actually Thinking
Your Free Consultation
Let's figure out together if this makes sense for your home.
No pitch. No pressure. Just an honest conversation about your energy situation, your goals, and whether a Keen Heat Pump is the right move for your family. If it's not, we'll tell you.
Prefer to call?
(203) 427-7489