Recent content by MThomas

Yes it's heat only. It has 2 pumps on it one pushing the water and one pulling the water..

It is a Navien NHB-055H NG and the pipes are all copper..

1/2 inch pipe coming off of the 1 inch pipe up to the rad the 1/2 inch pipe coming off the other end of the rad down to the 1 inch pipe, he put a 1 inch shut off between the 2 1/2 inch pipes to force the water through the rads.

With shut off valve between each rad to force the water through the rads, they are about half closed...

Yes

8 rads on the main floor and 4 rads in the basement, system was probably built in the 1950's or 60's. That main pipes are all 1 inch and where they branch off they are 1/2 inch.

Hello Everyone, I had a new Navien boiler installed to replace and old gravity feed system and we have had nothing but problems with it. We had to install shutoffs at every rad to force the water to go through all the rads. The boiler keeps shutting down every week or two with an error 302-00...