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return

In finance, return is a profit on an investment. It comprises any change in value of the investment, and/or cash flows (or securities, or other investments) which the investor receives from that investment, such as interest payments, coupons, cash dividends, stock dividends or the payoff from a derivative or structured product. It may be measured either in absolute terms (e.g., dollars) or as a percentage of the amount invested. The latter is also called the holding period return.
A loss instead of a profit is described as a negative return, assuming the amount invested is greater than zero.
To compare returns over time periods of different lengths on an equal basis, it is useful to convert each return into a return over a period of time of a standard length. The result of the conversion is called the rate of return.Typically, the period of time is a year, in which case the rate of return is also called the annualized return, and the conversion process, described below, is called annualization.
The return on investment (ROI) is return per dollar invested. It is a measure of investment performance, as opposed to size (c.f. return on equity, return on assets, return on capital employed).

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  1. G

    Secondary return problem

    Had a customer contact me today. They have brought a property that has an unvented cylinder with a secondary return. The property has been extended the hot taps in the original side of the house work ok but the hot taps in the extension side run hot for a few seconds then go cold. The run is...
    • Gav692
    • Thread
    • america problem return secondary usa
    • Replies: 2
    • Forum: USA
  2. elvis80

    PEX-AL-PEX for hot water return (manifold system)

    (Bear with me this is my first post on here...) We're putting in a manifold system for the H+C in the bathrooms of our new house (self-build). What are everyone's opinions on using PEX-AL-PEX pipe for our hot water return system, please? Good or bad idea? The pipe says: Tmax 95 degrees C / 10...
    • elvis80
    • Thread
    • america hot hot water return system usa water
    • Replies: 20
    • Forum: USA
  3. eagleeye

    Pump and m/valves on return

    New Vaillant heat only boiler install to replace old Kingfisher floor standing gravity hot water / pumped heating boiler. Boiler on ground floor and dual elson tank in loft. So the new boiler has gone in the position of the old boiler with also with the pump, m/valves and wiring centre. They...
  4. B

    Secondary Return Pump Noise / Air ?

    Hi, Recently I noticed that we were running out of HW more than expected, perhaps it’s people are taking more baths but I wanted to check out if the pair of Vaillant uniSTOR’s were both heating, thinking that maybe I had a problem with one of the Zone Valves were not heating one of the tanks...
  5. B

    Non return valve necessary?

    Hi I’m in the process of redoing my bathroom and adding a exposed thermostatic shower mixer I have a Potterton Titanium 33 (ErP) Combi Boiler My question is do I need to add non return valves to the hot and cold feeds to the mixer ? If necessary what is the maximum distance from the mixer that...
    • Bob beach
    • Thread
    • america necessary return usa valve
    • Replies: 7
    • Forum: USA
  6. gingalig

    Non return valve on unvented

    Hi, thanks in advance for any advice, I've come to change a manifold for the ufh, I have noticed a non return valve on the main dhw outlet on the unvented cylinder Is this acceptable ? 1570704464 My thoughts are no it's not.
  7. M

    Secondary Hot Water Return on Pumped Shower supply.

    New Shower being installed - thermo mixer - new shower is around 60 feet from HW cyclinder, multiple swept 90 deg bends plus around 10 feet of vertical rise, so negative head - 22mm pipe is installed (15mm last 1 meter) - without pump - dribble so intend fitting dedicated Salmander 3 bar pump...
  8. mgw

    Pump on return is there a problem?

    I know years ago before the TRV the pump went on the return, but new house to me, all TRV's on radiators except for bathroom which does not really count as that is thermo syphon, not worried about boiler as thermo syphon domestic hot water with no motorised valve, but am worried about pump, will...
  9. Scott_D

    Horizontal unvented - secondary return

    Is it true that a horizontal unvented must have a secondary return pump fitted for destratification? @chris watkins
  10. M

    Location of secondary return pump and return pipe for underfloor heating.

    I am fitting a secondary return on a system, tank will be in the loft. All the pipework goes up to the loft at the back of a cupboard, I would like the pump to go on the return pipe in here so it is easily accessable for maintenance. My collegue says he thinks it should go to as near to the tank...
  11. B

    15mm flow and return, plate exchanger blockage?

    The combi boiler has 22mm flow and return outlets but they are immediately reduced to 15mm as they come out the boiler. After the pipes come out of the boiler, they split off into 3 branches. Branch 1 is for a single radiator only. Branch 2 feeds about 9000BTU diownstairs and branch 3 feeds...
  12. M

    Adding a secondary return to a system

    Hi, what do people a think is the best way to add a secondary return to an unvented cylinder install. The scenario is I am quoting to replace a gravity system with an unvented. The bathroom furthest away takes around 2 minutes to get hot water. The problem is all the floors are glued and...
  13. M

    Self assessment return advice?

    hi folks. I'm attempting to do a self assessment as part of last year I worked as a subby for 6 months. I'm struggling with a couple of bits. Can any of you guys offer any guidance ??
  14. D

    Non return valve- Hot water bath?!

    Hi (System is header tank in loft, indirect hot water tank) After the hot water isolation valve under my bath, there is a non return valve between the isolation valve and the hot water tap. When I switch the hot water (mixer tap) on in the bath nothing happens until I flick the SINK mixer...
  15. G

    Non Return Valve on low pressure system

    Hi, Previously wrote on here as the tank in the attic was overflowing due to mains pressure back flow up the hot water tank fed pipes. Resolved this issue with a NRV on the hot pipe coming from my twin pump. (See pic) Solved my issue but because the NRV is spring loaded the pump doesn’t...
  16. A

    Worcester 24i Junior Return Unit By-pass Valve

    Have had to replace the pressure relief valve - unfortunately, the way the boiler was installed (pipes not far enough back away from the heat exchanger) I had to remove the return unit to be able to access the valve. This is where things went a little awry... the by-pass valve (87161064340) fell...
  17. H

    Identify Boiler Return

    Hello Forum, Please could you help confirm that Pipe 'A' is the boiler return? - Pipe 'C' confused me, but I believe it is the return from Upstairs/Downstairs heating zones. Pipe Description A Boiler Return? B Boiler Flow C Return from Upstairs/Downstairs heating zones? D...
  18. A

    Why does filling loop have to be installed to the return pipe?

    Hi all Im a gsr and just after clarification into this,as genrally manufatures state to install on return pipe of boilers. Im only asking for advise, as a senior gsr said to me that its best to install on the flow side as when flushing the system connecting to the filter, it helps filling water...
  19. D

    Underfloor heating - supply & return flow temperature question

    Hi I have a wet based underfloor heating system and I've noticed that the stone floor in our kitchen isn't warming up evenly. There is one patch that is much warmer than other areas. I have noticed that when I look at the manifold the supply temperature is running at around 50 to 55 degs but...
    • dl1973
    • Thread
    • flow heating manifold question return supply temperature temperatures ufh under floor heating underfloor underfloor heating
    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
  20. G

    Radiator problem - busted lock shield / return valve

    Hi I am not an expert so I apologise if any of my post come across as naive. I have a pretty new boiler and there is one radiator on the system that never warms up and it hasn't for a long time but have just ignored it. It is most likely the last radiator in on the system. After having a look...
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