Best Of
Re: correct gpm for open loop geothermal
2.2 gpm per ton is a temperature change of 11F.
1 gpm per ton is a temperature change of 24F.
For heating, in many places that 24F drop would freeze up. Even at 2.2 gpm your source water can't be below 43F or you risk freezing.
Re: How to prevent hydronic piping from freezing?
There is a timer called ThermGuard that connects across your thermostat and will turn on your boiler for a programable set amont of time and a programable number of times per hour. It has a defult setting of turning on the boiler for 5 minutes every half hour. I purchased one for an area in the home that I didnt plan to heat but never installed it so I cant say anything about its reliability.
TomS
Re: How to prevent hydronic piping from freezing?
A word of caution, if there is any interface between your domestic hot water and the circulating heat system, then you must use only propylene glycol, never ethylene.
akjim
Re: correct gpm for open loop geothermal
Is this system a water furnace? How deep is the well, how far away is the dump point?
Check the gas pressure first before you do anything.
The well water is going to be cold 52 degrees or less so please keep that in mind when looking at the whole picture.
I guess you could flush the exchanger with strong vinegar and see how much build up is in it, you may very well have no restriction of flow.
leonz
Re: Plate heat exchanger
On the glycol side you want an air purger, pressure gauge, relief valve and expansion tank also
Maybe an Axiom fill tank
hot_rod
Re: Plate heat exchanger
I presume a brazed one? Gasketed likes constant temperatures.
Also you can think about filters for both sides. Not easy to clean brazed plate exchanger.
I'd just get an electric heater for that bathroom.
jumper
Re: Difficulty in Properly Sizing Equipment - 2140 Sq Ft New Construction Spray Foam House
For new construction, done to current code, in your climate, 2140 square feet, 39K heating and 29K cooling actually sounds kind of high.
Re: Difficulty in Properly Sizing Equipment - 2140 Sq Ft New Construction Spray Foam House
minis have low static ducted units that are 1-Ton or less.
Please
2 stories
2 systems.
pecmsg
Re: Sanity check plan new zone
sounds like you need to shop for a better brand of zone valves.😉
There is not a lot of difference between a zone valve and a zone actuator on a manifold. Often they are the exact same operator as one another
Zone valves with a short life span are often short cycling themselves to death
On the average a ZV cycles 5000 times a heating season. Quality valves, gear trains, motors and switches are designed for 100,000 cycles. Or 20 years of service.
hot_rod