To insist on coat or blanket from car seat to house with 6 month baby?

Whats the connection between the immune system and a short hop outside?

Incorrect.

The WHO suggests 20 degrees as the ideal temperature for the old, young or unwell. For healthy adults, you should heat your home to a room temperature that feels comfortable.

Feeling a blast of cold air for 5-10 seconds is hardly harmful is it…

If it's that cold, surely your baby needs to be wearing more inside the house. No vest? Is your house very warm?
A house over 19° is not healthy in winter. The air will be very dry. It's better to wear layers and have a cooler house. 18° is optimal.
Carrying a baby 20m to the car even in freezing temps will have no ill effects but obviously you need their coat/blanket in case of breakdown, same as adults.

And exactly how would a 5-10 second jaunt in the cold have adversely affected him? How would having a coat put on him have ‘built up his immune system.’ Sleep and food are the top priorities for a good immune system - not remaining warm at all times

Because he didn’t want to wake him. Seems quite sensible.

Seen your update - I definitely wouldn’t risk waking a sleeping baby - first rule of parenting.
I would have suggested just draping a blanket - would take seconds, baby wouldn’t notice and it would have kept the cold off.

I wouldn’t have had the baby dressed in that little to begin with. Vest, babygro, maybe a woolly of some kind and folded over blanket for the car. And a hat.

I’m with you OP. 7c is pretty chilly. I’d use a blanket and a hat for baby to and from the car. I walked from the kerbside to the front door in 7c today while carrying my jacket. I was wearing a tee shirt and jumper and I still felt a blast of cold air.

I wonder if your husband walks about outdoors in 7c wearing just a single layer of cotton.

The thing is he was holding the baby and he said no to the coat. You then stepped in and you started the argument. A chest infection can't be picked up in a 30 second run to the car. That's not how infections work.

Because why do you get the final say

Because you made it an argument. It’s 20m not 20 miles, you’re being ridiculous.

But your husband was right , it was a 20 second walk outside and a coat , hat , blanket is unnecessary. The only person arguing is you , what makes your opinion right and your husbands wrong ?

'why not just let me do it as his mum?'
Why not just let DH do it as his Dad? Problem was you both thought you were right, you both could be. However, you didn't mention baby was sleeping in your op so I'd be of the no faff let's get him in the car option.
I'd spend more time thinking why dint you have a clean vest avaiable or even a top you could've put on underneath instead or cardi over the top especially especially if youre so worried about illness.

I think you need to turn this question on yourself. Why did you feel the need to turn it into an argument? Your last line is absolutely correct, it didn’t need to be combative but you made it so but trying to overrule DH when actually he was being very reasonable.

It seems crazy to me to wake a sleeping baby to put a coat on then to walk from the warm car to the warm house. Just drape the coat over their lap if you're that concerned.

Doubly not worth it for a sleeping baby. I think you might have made a thing over something that wasn’t a big deal. I know it’s awful when they’re sick and can be quite frightening but I’m sure your wee one was ok without a coat for a couple of minutes.

YADNBU

I would have put a blanket over him.

He’s only 6 months old and it’s obvious he needs to build up his immune system.

I can’t believe the comments you’re getting on here.

A chest infection is a disease you don’t get that unless you are in contact with the germs and being outside lessens the risk. No idea why they had no vest on, as that is an issue but no need to fuss about a blanket for that short distance.

You made it an argument? He said no, it’s a tiny walk, unnecessary and the baby will wake up. You then turned it into an argument by insinuating he couldn’t be bothered or was wrong and that you’d have to do it yourself? During all this debate and the potential dressing the baby you could have got inside.

I had a sort of footmuff thing for the car seat so it could be open in the car and then done up when outside.

I would have quickly draped a blanket over the baby to keep the chill off.
As an adult or older child, you can brace yourself for the short burst of cold. A baby cannot do this and whilst nothing bad will happen, it is just a bit of consideration and kindness that only takes a moment to do.
I know if was asleep in my pjs and someone suddenly wheeled me outside for 30sec in 7degree weather without warning then I would be very upset.

I agree. I think a vest would be advisable. A cotton onesie is summer wear.

I would have used a blanket to be honest for that journey but what we used to do was have a thin fleecy jumper that dc wore in the car. it takes while for a car to warm up and this worked for us.

I’d probably have had him in an extra layer (rule of thumb is one more than you, so a vest under a onesie for a baby is ideal) but you’re definitely overthinking the walk to the house, it’s seconds and it’ll cause no bother at all!