A problem would be keeping the heat on. It turns off after a while.

Also the heat would only come out if the cabin thermostat was calling for it, so you would need to seal the other vents to keep the cabin cold.

 

Unless you slightly open a window in the room for its air to escape to the outdoors the heated air from the vehicle will be opposed by the pressure build up in the room.

 

I wouldn't attach any ductwork to the car's outlets, because the A/C system is not designed to handle the kind of back pressure that will be presented even though your flex ducts are oversized.

 

If heating your home is the primary concern I would consider a kerosene heater.

 

This may be dangerous.

A friend of mine ended up in the ER and then a flight to a hypobaric chamber due to CO poisoning by a kerosene heater in his shop.

 

Like others have said I don’t think you’re going to get enough air flow to actually heat the house. Maybe a degree or two but nothing substantial.

I’m assuming you are in an area that doesn’t get too cold. Ie it’s been below 0 every night here for the last week. If you aren’t getting that cold, maybe an inexpensive 2k+ watt generator. A heavy duty extension cord and a space heater? I see harbor freight has one for $600 that will do 1600 watt continuous. I know they go on sale once in awhile.

 

If heating your home is the primary concern I would consider a kerosene heater.

This may be dangerous.

A friend of mine ended up in the ER and then a flight to a hypobaric chamber due to CO poisoning by a kerosene heater in his shop.

In an all electric house we have a four pack of battery powered CO detectors if we need to use combustion.

We have two kerosene heaters and fuel, and a propane Mr Heater Buddy with a stock of one pound canisters as well as an adapter hose for using a 20 pound bottle.

edit to add: crack a window in the room where combustion is occurring if you go this route.

 

Or in case of dangerous cold you could sleep in the ID4.

 

If the house is going to get that cold you need to know how to shut off the water and drain the pipes if not also the water heater, sink traps, and toilets (plunger).

 

I'm not sure, but I suspect that the number of BTU's you'll get into the house this way would be... insufficient. There would be so many losses on top of a system designed to be as small and efficient as possible.

Is it possible to get a small dual fuel inverter generator and one or two electric oil-filled radiators? The inverter generators are relatively quiet, run on propane (less worry about stale fuel), and can keep a fridge cool too.

 

Our house has no gas, solar, or battery backup system. When the power goes out, we freeze.

Don't know where you're located but north of the border that would be way too much risk. A propane tank with a backup generator would be the best option.

 

No way it can make enough heat to heat the room… Just doesn’t have the capacity…

 

Don't waste your time or energy on this plan. It will not work. The cheapest way to have backup heat for emergencies is a kerosine heater. A gas or propane powered generator and a space heater are more expensive options. Good luck.

 

Or if you don’t want to pollute or risk poisoning yourselves or star a fire, investigate a backup battery and some solar panels … then you can keep the lights on and run a heater.

There’s a ton of sales going on… BLUETTI | Portable Power Station, Solar Generator, Home Battery

Or, trade the car on on a Hyundai that has V2L function