ALL ELECTRIC INFRASTRUCTURE
A complete building with no gas service — starting with the ADU, where there's no gas line to give up.
Minnesota homeowners don’t want to be talked out of their furnace, and an ADU doesn’t ask them to. It’s new construction with no gas service to abandon, so we simply never run one — and the house across the yard stays exactly as it is.
Gas Appliances
NONE
No flue, no combustion air, no chase through the roof, no CO risk in a tight 500 sq ft envelope
Service size:
100 A
The code minimum for a dwelling. Unmanaged, the same equipment scopes at 150 or 200 A.
Heat in an Outage?
YES
Battery-backed. A gas furnace in the same outage does nothing — its blower needs power too.
Ten components, one panel
Everything in the package hangs off a single managed panel. Select a component to see what it does, what it draws, and what it replaces.
Why the ADU goes first
This package leads with accessory dwellings because an ADU removes every objection that stops an all-electric conversion in a Minnesota house.
NOTHING TO RIP OUT
It's new construction
There's no furnace to write off, no stranded equipment. Every mechanical choice here is a first choice.
LOW STAKES
It isn't the house you sleep in
The ability to prove cold climate heat pumps before committing to the main house.
NO ULTAMATIM
The main house keeps its gas
Nobody is asked to choose. The furnace across the yard is untouched.
Frequently Asked Questions
It's Thirty Below. That Heat Pump is going to quit.
To carry the cold-climate listing a unit must deliver a COP of at least 1.75 at 5 °F — nearly two units of heat for one of electricity on a morning that cold.
NEEP CCASHP v4.0 · COP ≥ 1.75 at 5 °F
What happens when the power goes out in January?
The battery carries heat, lights, water and refrigeration while the panel sheds the oven and dryer. A gas furnace in that same outage produces nothing.
13.5 kWh · automatic transfer at the panel
Electricity costs more than natural gas here.
Per therm it does, and the comparison is still never rate to rate. Take the worst case rather than the average: at 5 °F a listed cold-climate heat pump returns at least 1.75 units of heat for every unit of electricity, while a condensing gas furnace never exceeds one unit per unit of gas, at any temperature. The heat pump on the coldest morning of the year beats the furnace on its best day. Add no gas lateral, no meter, no flue, no combustion venting, and the build cost moves before the first bill arrives.
Operating cost modeled per project, not quoted from a chart
What the package covers
INFRASTRUCTURE
100 A underground lateral
Smart panel, per-circuit metering
13.5 kWh battery
Load calc and utility coordination
CONTROLS
Neutral-wired smart switches
Metered receptacles
Backup grouping at commissioning
Handover walkthrough
HEATING & HOT WATER
1.5 ton cold-climate heat pump
Snow stand and condensate detail
Hybrid heat pump water heater
Linear electric fireplace
NOT INCLUDED
Rooftop solar — conduit pre-run
EV charging — 48 A stubbed
Main house gas service
Site work outside the footprint
KITCHEN & APPLIANCES
Induction cooktop, wall oven, ventless heat pump laundry,
ENERGY STAR fridge & dishwasher,
ERV for continuous fresh air
INCENTIVES
Utility heat pump rebate
State and federal programs
Confirmed at proposal, never concept
Cold-climate heat pump criteria are from the NEEP ccASHP Specification v4.0, effective 1 January 2023. The specification sets a COP floor at 5 °F rather than a capacity-maintenance threshold.
Why the EV circuit is stubbed rather than finished: a 48 A charger taken at nameplate pushes this package to a 150 A service at any size, so we run the conduit and leave the choice open.
Load figures use the optional dwelling calculation in NEC Article 220.82; 100 A is the code minimum service for a dwelling under Article 230.79. All figures are planning values pending a project-specific calculation.