What stays, by exact model?
A dual-fuel proposal should identify the furnace, indoor coil, outdoor unit and controls as one arrangement.
Read the dual-fuel path →
Gas to Heat PumpOperated by UniColorado Heating & CoolingKeep gas backup or replace the furnace
When the weather changes, which heat source runs?
Compare how dual-fuel and all-electric systems respond across ordinary heating, colder weather, defrost and backup calls.Keep gas as backup. A heat pump adds electric heating while the furnace remains available as a second source.
Choose a system condition
Outdoor heat pumps beside a house in snow at dusk.
SELECTED SYSTEM · OUTDOOR ROLEHeat pump
Gas furnace, indoor coil and connected ducts shown.
SELECTED SYSTEM · INDOOR ROLEFurnace blowerGas burner stays off
Shown pathOutdoor heat → refrigerant → indoor coil; the blower moves room air upward through the coil to the ducts.
See the equipment path
CONTROLThermostat
OUTSIDEHeat pumpOutdoor coil + compressor
ILLUSTRATIVE UPFLOW CABINET · AIR MOVES ↑
Indoor coilTransfers refrigerant heat to indoor air
Gas furnaceGas burner off · blower remains available
BlowerMoves indoor air
Supply ductsHeated air to rooms
GAS FUEL
REFRIGERANT HEAT TRANSFER
CONTROL SIGNAL
OUTDOOR COMMAND
SUPPLY AIR
Navy dashed control · Cyan heat / supply air · Amber dashed conditional equipment or path
Starting with a furnace only?Use the gas-only view to see the existing-home reference before a heat pump is added.
Questions for the proposal
Decide the arrangement before comparing equipment.
Which source heats, and when?
Ask how the design addresses the house load in cold weather, how backup operates and which control setting governs the transition.
Read the all-electric path →Photograph the connected system.
Include the furnace label, indoor coil area, duct transitions, thermostat, outdoor equipment and a closed electrical panel.
Photograph the starting system →Start with the connected system
Show what is indoors and outside.
A field assessment determines whether retained equipment, ducts, electrical service and installation space support the proposed arrangement.
Send system photos through PlenumSchedule an on-site assessmentYour home. Your estimate.
Show the indoor and outdoor equipment together.
Send a wide mechanical-room view, equipment labels, the outdoor unit and a closed electrical panel for UniColorado to review.
Equipment labels and a photo of the closed electrical panel help, too. Leave covers in place.
Prefer an in-person estimate?Schedule an estimate ↗
Technical references
ENERGY STAR explains pairing a heat pump with a furnace, sizing the equipment for the home and checking airflow during installation.
ENERGY STAR: Air-Source Heat PumpsENERGY STAR: Quality InstallationBosch: Heat-pump equipment manualsBosch BVA air-handler installation instructions