New Home Laars Combi Boiler

eengelhart

Hi Everyone,

I’ve recently finished our new home build and have been experiencing issues with water pressure. I’m wondering if there’s more for me to do before calling in outside help.

Boiler: LAARS Combi Boiler 140

Propane

Heat set to 125*F

Issues: Low water pressure when showering. Water seems hot enough, just feels like more of a heavy rainfall than a shower.

I’ve adjusted the mixing valve already but I’m wondering if there’s more balancing to be done. Cold water pressure is fine, and sinks have decent hot water pressure.

It is a 3/4” supply to 1/2” branches. Upstairs shower is the one in question. Also, upstairs sink hot water takes very long to get hot.

Any help is greatly appreciated!

-Evan

Mad Dog_2

The intake screen could be clogged on the unit. Check that next. Mad Dog

Ironman

The screen on the water inlet may be clogged or the internal plate heat exchanger may be fouled from hard water.

I can’t tell for certain from your pictures, but it doesn’t appear that there are any valves provided for de-scaling the heat exchanger.

hot_rod

If it is brand new, I doubt you have scaling issues. Yet!

I don't know if that model mix valve has screens on H &C the union versions do. Check the installation manual. That is another common "choke" point, at the mix valve.

kcopp

On another note why didnt they run a combustion air intake? That would be best practice especially where the boiler is located in the laundry room…

Mad Dog_2

Kcopp..

C'mon..thats extra...ha ha... Mad Dog

psb75

Check any screens that may be in the anti-scald/mixing valve.