Come, come, now. That's really asking a bit much.

CR4 is, after all, "The Engineer's Place for News and Discussion^SM", which I don't think includes free project design.

Have you tried to find out anything for yourself?

I must congratulate you for registering - if you hadn't, I suspect you'd have got very short shrift with such a question.

(might be an idea to choose a different name ).

If your willing to work for the knowledge then go here

http://www.computrols.com/

I have what you need. I am happy to send it to you. My fee is $15,000 american dollars. Let me know if you want to proceed.

http://www.watlow.com/reference/ While most of this site is for heating controls there is a lot of information on controls that can be used for heating or cooling.

Wow. JohnDG has a point. Tall order. But assuming this is for your great aunt who can't get out of bed, try this. There are a number of Windows based softwares that will work with the compatible thermostat. Look up www.homeauto.com. They have the product you need for auntie.

Good Luck,

James

Use your computer to MSN/text message your son to turn the AC on and off. You can even control it at work. No extra hardware needed.

Pineapple

That is better.

James

Brilliant!!!