[bobcowan]

The first car I built had a heater. Worked great sitting at lights or moving in slow city traffic. But with anything over about 45-50mph, it was pretty useless. For the second car I didn't install a heater at all.

A firend of mine put a velcro strip along the bottom of his dash. And he has a blanket with a matching velcro strip. He attaches the blanket to the bottom of the dash, and tucks it aorund his and the passengers waist. That traps the hot air around their legs and lower torso. He says it works great in some pretty cold temps.

I bought my wife a battery powered vest. It really keeps her warm; and she can use it outside of the car. I have a pair of battery powered gloves from Gerbing that work well in a lot of situations and vehicles. The vest and gloves will easily last 5-6 hours on a single charge. I have a power outlet in the trunk, so it's easy to charge spare batteries while we're driving.

Personally, I don't feel the cold that much. I wear 1-2 layers and a good pair of gloves, and I'm good to about 20*.