I recently renovated a home and installed a new weil mclaen high eficiency boiler with 5 zones. 2 zones continue to shut down. After purging they work for a few days to a week and then they shut down again. No visible leaks anywhere. Recently we discovered that the pressure relief valve was bad....

Have a two zone heating system and both not working. AT first only 2nd floor was getting heat. Someone suggested replacing the circulating pump. I changed it, bled the pipes and now both zones are not getting heat. What can be the problem?

Definition for salt water life zone

Need to cool two areas of my house. The main downstairs area is 2200 sq ft, and the upstairs is 1000 sq ft. The first contractor thinks that it is better to install two separate systems because it can be a challenge to balance zones properly with add-on rooms. His suggestion is a 5 ton and...