this post was submitted on 30 Oct 2024
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With winter coming up, I have two options for home heating.

Central unit

  • I can use the central unit and close/open vents throughout the house to heat up only the individual rooms I want. This would heat up rooms very quickly. However, to make this work, the living room with the thermostat will also need to be heated so that the thermostat reads the proper temperature. The living room is by far the largest space at about 2.5 times the size of the largest room.

Oil-filled radiator

  • I can use an oil-filled radiator to heat up an individual room. This would be much slower, but I wouldn't have to heat up the entire living room. However, the oil-filled heater might not be as efficient as the central unit. I don't know. I plan to rarely heat up the living, no more than once per month.

Edit: The central heating unit is actually a heating kit made up of a few coils that is added to the central a/c.

Edit 2: Where I live, it might freeze once per year over night for a few hours.

Which would be more efficient on the electrical bill, and would t be considerable or negligible?

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[–] spankmonkey@lemmy.world 3 points 19 hours ago (1 children)

How cold does it get where you live and which sides are the room and living room on compared to the coldest wind?

If the room you use is on the north side and the cold wind comes from the north, that electric heater is going to get a workout and you lose the advantage of the house having a heat mass that can even out the need to hwat the one room.

If the room is on the south side away from the wind the rest of the house would be a bit of a buffer, making heating only that room less of an energy simk. The number of windows and other ways to lose heat will matter too. If the living room has a lot of windows and other ways to leak heat then not heating it could be an advantage.

If it gets to freezing where you are at I would suggest a combined solution if possible. Set the central heat to a temp a bit above freezing to keep the pipes from bursting (around 55 F) and shut the ducts to rooms you don't care about. The difference in temp to the outside temp is what uses the most energy, and closing that difference has a huge difference on energy costs. Then use the space heater in the room you do care about to reach the temp you want.

This will result in the central unit doing a lot less work than it would to bring the whole house up to temp, but the portable unit wouldn't need to heat the the room and the interior walls nearly as much becuae it would be heating the difference between the central unit at the desired temp. This will probably be the most comfortable/consistent arrangement and likely close in cost to just doing the room by itself.

[–] BackOnMyBS@lemmy.autism.place 2 points 19 hours ago (1 children)

It might freeze once per year...maybe. My area is surrounded by trees, so I think wind hitting the house is negligible.

[–] spankmonkey@lemmy.world 2 points 19 hours ago (1 children)

In that case, I still recommend turning on the main thermostat but setting it very low so it only kicks on during extremely low temps as this can help with comfort without much cost at all. The space heater would then do the job in the room you care about to save costs.

One other thing that I haven't seen mentioned elsewhere and I forgot myself is humidity. While a heater isn't going to change the humidity like an air conditioner that is cooling does, the fan in the unit can even out the humidity in the house and humidity can have a big impact on how the temp feels. Depending on the size of the room and how much air gets circulated, your presence could have a significant impact on the humidity levels.

I would recommend that whether you run the central at a low temp or not, running the fan for a bit once in a while would be a huge benefit to the home. You don't even need to turn on the heat for that, just the blower. This will help to reduce any damage from condensation throughout the house, and you don't need to open your room to get the benefit. Within the room you are using it might be a good idea to check the humidity levels and look up what the best humidity is for the temp you are aiming for. While that might mean getting a humidifier or dehumidifier if the room is way off, that will most likely be a lot less expensive than the heating cost and you might even find a slightly lower temp comfortable and save more than you spent on adjusting the humidity.

[–] BackOnMyBS@lemmy.autism.place 3 points 18 hours ago

Great suggestions! I will definitely do them. For now, I'm guessing that I'll prolly set the central heater at ~62*F. That will make sure it kicks on when it gets too cold and will also move the air about the house. Once I try this out, I can see if I'd like it to be set at a different temperature.