Here are some other websites you might find useful:

Home Improvements

• Totally Home Improvement - daily news and information about Home Improvement Ideas with tips and tools to help with your DIY projects.
• Ask The Builder - loads of information and advice on all kinds of home projects
• Do It Yourself - heaps of great project ideas for around the home
• Smart Thermostat Comparison - select all the features of your HVAC system and this comparison engine will recommend the thermostats which are best for your home.

Health Information

• CDC - information on Carbon Monoxide Poisoning and Prevention
• Wikipedia - Carbon monoxide poisoning

Smoke Alarms

• Amazon.com - they sell a comprehensive range of smoke alarms
• U.S. Fire Administration - comprehensive guide to using smoke alarms