ᐅ Fireplace - Fresh Air Supply Through the Basement or via the Chimney?

Hello,
we are currently in the final planning phase of our semi-detached house and want to install a room-sealed storage stove in the living room.
So far, the combustion air supply was planned to come through the chimney (a so-called LAS, air-flue gas system).
The stove installer has now recommended that instead the air supply should come through a pipe that exits at the bottom of the stove and runs horizontally along the basement ceiling to the outside. According to him, the advantages are:

1. It is easier to light the stove because the air does not have to be "pulled" down from above but comes in horizontally.
2. There is no need to transport cold winter air down two floors to the ground floor, which would cool the upper rooms. It is better to supply through the basement, which is unoccupied.

The house builder, on the other hand, is concerned because such a pipe along the basement ceiling would become very cold and cause condensation.

My question: Has anyone had experience with either option? Can such a pipe be insulated well enough to prevent condensation?
Or conversely: Do you have the impression that the rooms through which the chimney passes cool down when the stove is in use?

I have a two-flue ERLUS premium ceramic LAS chimney. Both the room air-independent gas condensing boiler and the room air-independent wood-burning stove in the living room draw fresh air from above. This works perfectly, and the wood-burning stove is also easy to light.

I can only agree with your home construction company.

My parents have the second option with ground-level air intake. The draft is good, but I cannot compare if it is better than with LAS. They do not have any issues with condensation, but I would have concerns myself and will not implement it that way.

We also have Erlus LAS. Overall, the chimney tends to be more warm than cold. It is unlikely that the rooms cool down. It is also said to be an advantage that the combustion air is preheated in the LAS.

When you want to light the fireplace, it is usually cold outside, and cold air naturally flows down without needing to be "sucked in." Therefore, I find the argument about lighting to be unconvincing.