We are getting bids to replace our HVAC system in a small1908 bungalow. First bid was $12,000. That includes a new furnace, hot water heater and central air conditioning unit. When we had this work done 15 years ago it was $7,000. We're having our local utility company bid on it this week because they will divide the cost into our monthly gas bill. $12,000 seems excessive but everything is so much more expensive these days. I'm sure glad I don't have to heat or cool a tit-too!