eBook - Energy Saving Home Improvements from A to Z

ESHI - Water Heating - Drain Water Heat Recovery - Energy Saving Home Improvements From A to Z

 

Drain Water Heat Recovery

Any hot water that goes down your drain carries away energy with it. Drain water heat recovery systems save energy by using the heat in drains to preheat water coming into the water heater. Estimates based on the DOE test procedure for water heaters indicate that the equivalent of 350 billion kWh worth of hot water is discarded annually through drains, and a large portion of this energy is, in fact, recoverable. To capture and put to use heat from wastewater produced by all sources in a dwelling would require a regenerator-type, double-walled heat exchanger, one that can capture heat from wastewater generated by one fixture or appliance (e.g., a clothes washer) and apply this heat to assist another hot water demand that may occur at a later time. If wastewater generation is concurrent with the need for hot water (e.g., a shower), a nonregenerative, straightforward heat exchanger can be used. Heat exchanger systems of each type are available for use in buildings.

Related Article...

1491 - First it's bad earnings reports. Then questionable news on inflation. Regardless of the effects investors wish these tidbits would have on the financial markets, a single word of poor news seems to be sending the Dow Jones Industrial Average and, especially, the Nasdaq into a tailspin. But not so for real estate stocks, which continue to prove their mettle in trying financial times. In particular, the lodging and resorts segment of the market has turned in excellent performance, both on Main Street and Wall Street. So far this year, stocks for lodging and resort firms are up more than 9 percent. That's consistent with last year's performance, which saw lodging issues up more than 50 percent at a time when most other market indices were going down the tubes. So what's behind this run-up? Two simple and irrefutable factors. First, these stocks were undervalued at the beginning of last year. And secondly, continued excelled quarterly results almost consistently across the board have prompted prices of lodging stocks to rise accordingly. Case in point: John Q. Hammons Hotels, Inc. (AMEX: JQH) last week announced fourth quarter earnings up 7 percent over fourth quarter results the previous year. Read this Nemmar Real Estate Training article at Tenants, Landlords, Multifamily, Commercial

 

Real Estate Investing Advice FSBO Realtor Agent Broker Home Buyers Sellers

Figure 41: Drain Water Heat Recovery: This system captures waste heat through heat exchange from the wastewater drains.

Discuss this article

Real Estate From A to Z  -  Nemmar Real Estate Training. House Exterior Interior Structure Roofing Plumbing Insulation Heating Electrical Air Conditioning Construction Repair Home Improvement Renovation Home Inspection Appraisal Market Value

Nemmar Real Estate Training
Nemmar Business and Computer Consulting