Boilers & Hydronics

Facts + Figures: Air-Source Heat Pump Shipments Up 19 Percent in December

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Industry figures are estimates that are derived from the best available figures supplied by a sample of AHRI member companies.  


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My Day as a Potted Plant

A Tale of Corporate Misunderstanding and Embarrassing New Suits
By Dan Holohan
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The year I served as the potted plant, Sheraton was building a hotel out on Lawn Guyland. This is where things got tricky. 


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2014 AHR Expo: HVAC Commercial Equipment

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The NEWS was very busy at the AHR Expo in New York City, visiting as many booths as possible in search of new products. Below is a comprehensive list of all the HVAC commercial equipment we found on the show floor.


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Bosch Celebrates 20-Million Milestone

Portugal Plant Produces Gas-Fired Water Heaters
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Bosch Termotecnologia S.A.’s Aveiro plant, 70 kilometers south of Porto in the northwest region of Portugal, passed the 20 million mark in production of gas-fired water heaters this past fall. 


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Bradford White Corp.: Boilers and Volume Water Heaters

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The Brute™ Series is a line of gas-fired boilers and volume water heaters. 


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Bosch Thermotechnology Corp.: Modulating Gas Condensing Boiler

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With four models supplying from 84,800-214,800 Btuh, and cascades of up to 16 units for even higher outputs, the Buderus GB142 modulating gas condensing boiler can provide sufficient heating comfort for any type and size of home or small to medium business, said the company.


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Boilers, Water Heaters Efficiently Evolve

Manufacturers Aim For Higher Efficiencies, Smaller Footprints
By Matt Bishop
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When it comes to boilers and water heaters, manufacturers are sensing an ongoing trend — the move to higher-efficiency models.


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Boilers, Water Heaters’ Efficiencies Rise

Manufacturers Aim for Efficiency, Ease of Use
By Matt Bishop
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Water heater and boiler manufacturers are diligently introducing high-efficiency systems into the marketplace with the goal of making life easier for both the contractor and the consumer. 


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Contractors Discuss Strategies to Sell Boilers

System Knowledge, Return on Investment Headline the Selling Process
By Matt Bishop
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These days, it’s not just going into a house and installing a cast-iron boiler. Today’s units offer consumers multiple choices regarding efficiency and performance. 


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Heat Transfer: Nature Versus Math

Formulas and Assumptions Don’t Always Predict what Happens
By John Siegenthaler, PE
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The following formula has been around the North American hydronics industry for a long time: Btuh = 500 x gpm x delta T. It can be used to estimate the rate of heat transfer into or out of a device that has a stream of water flowing through it at a known flow rate, and with a measured temperature change between the inlet and outlet of that water stream.


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2014 Energy Efficiency Forum

Highlights from the 25th annual Energy Efficiency Forum in Washington, D.C.

Podcasts

NEWSMakers: Jeremy Begley

Jeremy Begley, home-performance specialist and Web and social media manager with National Heating and Air Conditioning Co. in Cincinnati discusses how and why you should add home-performance philosophies to your contracting repertoire. Posted on Sept. 12.

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2014 September 15

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Venting R-22

The NEWS reported that a man received prison time for venting R-22. Should EPA step up enforcement?
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2014 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

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