HI, new here... we're renovating a ~4500 sqft. house, going with:
- Radiant floor heat (Eco Warm panels under hardwood) on floors 1 and 2
- Keeping the the radiators on floor 3
- Secondary radiators for the two sun/sitting rooms
- Adding two radiators in the basement in lieu of the old oversized iron, to be removed.
Existing boiler: Viessmann Vitogas 100 GS10-72
Circulating pump: Astro 230
Secondary pumps: Grundfos Alpha2 15-55F
Controls: Tekmar thermostats for each zone w/ 315s and 402s to make it work
I had an engineer put together plans and a design for everything. According to them, the design is relying on injection mixing... but I've got a few concerns (maybe it's just that I know enough to be dangerous):
- It doesn't seem to be consistent with injection mixing designs I've seen (no primary/secondary loop, parallel or otherwise).
- The radiators and floor heat can't run on separate temps.
- The secondary loops will not be able to manage delta T (flow) separately from the actual Tsupply.
- The radiators in the sun/sitting rooms can't necessarily be run independently of the other radiators when they're supposed to be second stage heat for their respective rooms.
So, please let me know what you think, or if you have any questions.
Appreciate the input!(the removed zone (manifold 3) will be combined with manifold 1)