AReCoS

Product brief

AReCoS residential heat pump

Up to 5 tons · all-electric, or dual-fuel with the home’s gas furnace · ground-ready.

  • Controller: U.S. Patent 12,768,557, under test in a research agreement (CRADA) with UT-Battelle, LLC, which manages Oak Ridge National Laboratory for the U.S. Department of Energy
  • Air–water heat exchanger: patent pending
  • Patent and CRADA record
Reserve a place in the first unitsDownload the residential heat pump brief PDF
Residential heat pump: air source first, ground loop later An outdoor heat pump unit beside a house draws heat from the outside air, with two refrigerant lines running to the house. A dashed pipe below the unit shows a ground loop that could be added later; the unit is designed to connect to it without being replaced. Same air–water heat exchanger as the rooftop unit First: air source Later: add a ground loop
Air today, the gas furnace kept if you like, a ground loop later, in a 1:51 explainer: an illustrated explainer with captions, not test footage. Prototype design.
  • WinterDesigned to hold at least 70% of its 47 °F rated capacity at 0 °F, 5 °F colder than the usual cold-climate point for home heat pumps.

Residential heat pump, ground-ready

Up to 5 tons · all-electric, or dual-fuel with the home's gas furnace

The rooftop unit's platform in a home size.

Prototype design, to be updated during certification

  • 23.8SEER2
  • 10.9HSPF2

5-ton ducted split.

A home with a gas furnace, one cold weekday, hour by hour A time-of-use electricity price, low overnight, high in a morning and an evening peak and moderate at midday. Below it, two units heat the same building through the day. A conventional heat pump with a furnace hands the heat to the furnace at one outdoor temperature, so the furnace burns gas through the cheap night hours and the heat pump runs into the evening peak. The AReCoS controller is designed to weigh, every hour, what heat costs from the heat pump and from the furnace, and run the cheaper: the heat pump through the cheap hours, pre-heating before the morning peak, and the furnace through the two peaks. A panel shows the two costs at the hour the playhead has reached. HEAT PUMP GAS FURNACE PEAK PEAK PRICE FURNACE BELOW ONE OUTDOOR TEMPERATURE AReCoS: THE CHEAPER HEAT, HOUR BY HOUR 12 AM PRE-HEAT NOON 6 PM 12 AM AReCoS CONTROLLER: COST OF HEAT AT 6 PM HEAT PUMP STANDBY FURNACE RUNS
Illustrative, not a measured result: a home with a gas furnace, one cold weekday on a time-of-use rate. The AReCoS controller is designed to hand the furnace the hours where its heat costs less.

Keep your furnace, add the heat pump

The heat pump is designed to heat whenever that costs less than gas, and it cools in summer.

Modeled for ten typical Minnesota homes, even with a simple changeover at 14 °F (−10 °C): about 32% lower heating emissions and about 19% lower heating bills than a furnace-only home, where the home qualifies for a utility’s residential space-heating rate. Assumes a clean, frost-free coil: an upper-bound case, not field results. Modeled, not measured (how).

Same three reasons as the rooftop unit:no defrost stopsone controller, picking heat pump or furnace by the hourground-ready: on a loop sized for the whole winter, designed to need no gas, with the furnace as a safety backup

Planned pilot retrofit: a new outdoor unit and the required valve and control changes, aiming to keep the home’s furnace and ducts. Indoor-coil, refrigerant and control compatibility will be confirmed for each site. No gas at home? The all-electric version is designed to heat with a small electric backup instead.

Residential: prototype; pilots targeted for late 2027.

Let's talk.

Pilot sites for the AReCoS heat pump RTU, manufacturing partners for the first builds, the controller for your refrigeration system, or the EV heat pump for your vehicle program.

Email info@arecos.net
625 Kenmoor Ave SE, Suite 350
Grand Rapids, Michigan 49546