Carrier Comfort Dual Fuel (4 Ton, D Coil)
4 Ton · Hybrid Gas/Electric · D Coil
Standard dual fuel system with heat pump and gas furnace backup
Performance ratings
How this system measures up
Cooling efficiency of the heat pump component
Heating efficiency of the heat pump component
Total system tonnage — sized for your home's load
Available rebates
Puget Sound Energy savings
Western Washington homeowners can stack these incentives on any qualifying install. We handle the paperwork for you — you just see a smaller bottom-line on your quote.
PSE heat pump conversion
Up to $1,500
For all-electric homes or heat pump to heat pump with refrigerant recycling.
Rebate eligibility is confirmed at the time of your free quote. Amounts may change seasonally based on PSE program updates.
System details
Technical specifications
Every Treat's install
What's included
Every system we install comes with the same commitment to quality and craftsmanship — no upcharges, no surprises.
- Licensed, registered & insured organization ($2M policy)
- Custom-built, air-tight, mastic-sealed ductwork transitions
- Evacuate and recycle existing refrigerant lines
- Charge refrigerant to manufacturer's specifications
- Floor savers and clean drop cloths in all work areas
- Completed start-up report meeting factory & Treat's standards
- Backed by Treat's 100% Satisfaction Guarantee
Why we recommend it
Features & highlights
What makes this tier system the right choice for your home.
- Automatic switchover between heat pump and gas furnace based on outdoor temperature
- Heat pump handles mild-weather heating for lower operating costs
- Gas furnace provides reliable backup heat during the coldest days of the year
- Smart controls balance efficiency and comfort without any action from you
- May qualify for PSE hybrid heat pump rebates when replacing an existing gas-only system
Compare tiers
Other options at this capacity
Not sure which tier is right for your home? Here's how this model stacks up against other Carrier options sized for the same load.
Carrier Infinity Dual Fuel (4 Ton, D Coil)
4 Ton · Hybrid Gas/Electric · D Coil
Carrier Infinity Dual Fuel (3 Ton, A Coil)
3 Ton · Hybrid Gas/Electric · A Coil
Carrier Infinity Dual Fuel (3 Ton, B Coil)
3 Ton · Hybrid Gas/Electric · B Coil
Ready for a free in-home estimate?
Our NATE-certified team will evaluate your home's heating and cooling needs, confirm rebate eligibility, and build a quote tailored to you — no obligation.