The WallClick here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Best Of
Re: Indirect Controls
Caleffi Legiomix is available from 3/4 to 3". It may be more $$ then you want to spend.
Really, any low lead 3 way motorized valve would work, as long as you have a control to tell the actuator what to do.
The Caleffi takes a floating 24VDC, tekmar 360 still has that output.
Really, any low lead 3 way motorized valve would work, as long as you have a control to tell the actuator what to do.
The Caleffi takes a floating 24VDC, tekmar 360 still has that output.
Re: Multifamily - replacing an old oil system with gas - single system or separate?
The indirect, operating with a gas boiler, will be much cheaper to operate.
Re: Multifamily - replacing an old oil system with gas - single system or separate?
With BTU meters every tenant pays for exactly the amount of heat or hot water they desire. A single boiler and a 120 indirect with a large coil, or dual coil for quick recovery.
I can't imagine anyone showering with 15 psi out of a 1.5 showerhead? But if so, you should not go thru a lot of HW
I can't imagine anyone showering with 15 psi out of a 1.5 showerhead? But if so, you should not go thru a lot of HW
Re: Combustion analyzer tolerances
I was quite surprised by the plus minus allowable error on O2 and every number derived from it.
Re: Only six zones?
Most of the water heater manufacturers have formulas for sizing DHW.
Back when, we assumed 20 gallons per person per day. Or 20 for the first 15 for additional family members. With low flow faucets I'd guess more like 15 per day, 10 for additional. This was for tank sizing.
Tank temperature matters. running a tank at 140 or 150 and mixing to 110 will extend drawdown. it also shortens tank life expectancy!
Any high flow faucet or multiple shower sprays will throw a wrench in the works for combi or instantanous type dhw appliances. I think code compliant showers are 1.5 gpm now. A couple high flow heads or body sprays could use the entire tankless or combi output.
At some point the occupants get used to the amount of dhw that is provided
Back in my ski bum days, 6 of us got by with a 40 gallon tank in the rental homes.
Back when, we assumed 20 gallons per person per day. Or 20 for the first 15 for additional family members. With low flow faucets I'd guess more like 15 per day, 10 for additional. This was for tank sizing.
Tank temperature matters. running a tank at 140 or 150 and mixing to 110 will extend drawdown. it also shortens tank life expectancy!
Any high flow faucet or multiple shower sprays will throw a wrench in the works for combi or instantanous type dhw appliances. I think code compliant showers are 1.5 gpm now. A couple high flow heads or body sprays could use the entire tankless or combi output.
At some point the occupants get used to the amount of dhw that is provided
Back in my ski bum days, 6 of us got by with a 40 gallon tank in the rental homes.
Re: indirect heat hot water tank vs. tankless coil heated on demand hot water - oil
I did not have a lot of experience with System 2000 or Energy Kinetics during my career in oil heat. However, I was impressed with the design. They were somewhat more costly back then but the lower operating cost was a reason to consider them. I did finally have the opportunity to install one several years ago... and was impressed.
Their new Ascent Combi- boiler looks like a good choice if there is a servicing dealer near you. They advertise a competitive cost to install one.
Their new Ascent Combi- boiler looks like a good choice if there is a servicing dealer near you. They advertise a competitive cost to install one.
Re: indirect heat hot water tank vs. tankless coil heated on demand hot water - oil
gnagyg said:https://energykinetics.com/ascent-combi-boiler/ Most efficient oil fired DHW:-) will be installed on August 13.
You will not be disappointed. Make sure the installed installs a scale stopper and sets up the burner with a digital combustion analyzer. The fuel savings from going from a boiler with a tankless coil will be huge. This is a fantastic boiler in my opinion.
Re: Understanding the Taco 007e
Hi there
you're right, the 007, and 007e are fundamentally variable flow, net flow is dictated by the system resistance. first step in sizing the pump, is knowing the amount of BTU's that have to get delivered to load. Next the piping has to be sized adequately to accommodate the flow rate required based on Load. quick rule of thumb for a 20 degree delta T, is approximately 1 GPM per 10,000 BTUs. the resistance through the selected length of pipe and diameter will give you the two variables necessary (Flow & Head), to size a pump. Here's where your analysis compares, the flow rate through 250 lineal feet of 1/2" pipe is the pressure drop the pump is pumping against and dictates where the pump operates on it's curve. This is true with both types as Jamie Hall so eloquently explains in this tread. There's a great video on tacocomfort.com called understanding ECM circulators. For your convenience, I provided a link.
http://www.tacocomfort.com/products/variable_speed_products/007e/index.html
great way to understand why electronically commputated motors, ECM are more efficient, in comparison to PSC type AC motors.
Please reach out to Taco Tech support at 401-942-8000 is you have additional questions regarding any Taco products.
you're right, the 007, and 007e are fundamentally variable flow, net flow is dictated by the system resistance. first step in sizing the pump, is knowing the amount of BTU's that have to get delivered to load. Next the piping has to be sized adequately to accommodate the flow rate required based on Load. quick rule of thumb for a 20 degree delta T, is approximately 1 GPM per 10,000 BTUs. the resistance through the selected length of pipe and diameter will give you the two variables necessary (Flow & Head), to size a pump. Here's where your analysis compares, the flow rate through 250 lineal feet of 1/2" pipe is the pressure drop the pump is pumping against and dictates where the pump operates on it's curve. This is true with both types as Jamie Hall so eloquently explains in this tread. There's a great video on tacocomfort.com called understanding ECM circulators. For your convenience, I provided a link.
http://www.tacocomfort.com/products/variable_speed_products/007e/index.html
great way to understand why electronically commputated motors, ECM are more efficient, in comparison to PSC type AC motors.
Please reach out to Taco Tech support at 401-942-8000 is you have additional questions regarding any Taco products.
