Heat Loss Calculation Help - Doing this right? Conclusion?

[NickRizzo]

A.C.H. Natural value I don't know, but after they added a few seals to the attic door etc, the hourly value was equivalent to the home square footage, so 1:1, or 4970/4970 heated area.

Hydro air is a First Co 48MBXR-4HW

As for your question about introducing air, no idea, I don't think it can. So, I just don't get the infiltration number and how/why it factors into a boiler heated home or doesn't.

Thanks

[dan sw fl]

A.C.H. Natural value I don't know, <--- 0.175
but after they added a few seals to the attic door etc,
the hourly value was equivalent to the home square footage, so 1:1,
or 4970/4970 heated area.
_____________________ 4,970 cfm50 / 4970 Square Feet Floor Area

Hydro air is a First Co 48MBXR-4HW

As for your question about introducing air, no idea, I don't think it can.

So, I just don't get the infiltration number and how/why it factors into a boiler heated home or doesn't.

Thanks

You will have to ask USBoiler for THEIR calculation basis/ methodology.
____________ PRESUME BOILER has adequate, separate combustion air.


Your residence only requires about 80 CFM mechanical ventilation. Ref. ASHRAE 62.2- 2013

ATTACHMENT

[pecmsg]

You will have to ask USBoiler for the calculation basis/ methodology.

Your residence only requires about 80 CFM mechanical ventilation. Ref. ASHRAE 62.2- 2013

ATTACHMENT

CFM or CFH

[dan sw fl]

CFM or CFM

_ - 2019
https://ashrae.iwrapper.com/ASHRAE_P.../STD_62.2_2019