<div id="home-middle" class="home-middle widget-area"><div class="wrap"><section id="featured-page-2" class="widget featured-content featuredpage"><div class="widget-wrap"><article class="post-11 page type-page status-publish entry" aria-label="Home"><div class="entry-content"><div class="wp-block-image"> <figure class="aligncenter size-full is-resized"><img data-attachment-id="2447" data-permalink="https://rogergriffith.com/griffith-011-compressed/" data-orig-file="https://mlaswucanzbr.i.optimole.com/w:auto/h:auto/q:mauto/https://rogergriffith.com/wp-content/uploads/2020/11/griffith-011-compressed.jpg" data-orig-size="450,299" data-comments-opened="1" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"}" data-image-title="griffith 011, compressed" data-image-description="" data-image-caption="" data-medium-file="https://mlaswucanzbr.i.optimole.com/w:300/h:199/q:mauto/https://rogergriffith.com/wp-content/uploads/2020/11/griffith-011-compressed.jpg" data-large-file="https://mlaswucanzbr.i.optimole.com/w:auto/h:auto/q:mauto/https://rogergriffith.com/wp-content/uploads/2020/11/griffith-011-compressed.jpg" loading="lazy" src="https://mlaswucanzbr.i.optimole.com/w:auto/h:auto/q:mauto/https://rogergriffith.com/wp-content/uploads/2020/11/griffith-011-compressed.jpg" alt="" class="wp-image-2447" width="600" height="400"/></figure></div> <p>Roger W. Griffith, P.E. provides forensic engineering investigations, litigation support, and expert witness testimony in cases related to mechanical/plumbing/piping system design, hot water systems/scalding, carbon monoxide poisoning, gas appliance venting, fuel gas fires & explosions, legionella outbreaks, and failures involving mechanical/plumbing/sprinkler systems. He represents plaintiffs and defendants and has provided testimony at depositions, arbitration hearings, and trials.</p> <p>Mr. Griffith has over 37 years of experience in designing plumbing, piping, HVAC, and sprinkler systems. He is a licensed professional engineer in 24 states. As the founder and principal engineer of <a href="http://www.griffithengineering.net/">Griffith Engineering & Consulting</a>, his design experience with commercial and industrial projects includes convention centers, schools, office buildings, condominiums, apartment buildings, hotels, churches, manufacturing facilities, medical buildings, restaurants, historic buildings, dormitories, fire halls, and maintenance facilities.</p> <p>Prior to founding Griffith Engineering and Consulting, Mr. Griffith worked for the Tennessee Valley Authority, an electric utility, for 14 years as a mechanical engineer with experience in the design, maintenance, and operation of pumps, piping, valves, heat exchangers, and boilers. He also had extensive training and experience in problems -solving investigations, root cause analysis, and failure analysis, teaching many courses on these subjects throughout the company.</p></div></article></div></section> <section id="featured-page-4" class="widget featured-content featuredpage"><div class="widget-wrap"><h4 class="widget-title widgettitle">Areas of Expertise</h4> <article class="post-232 page type-page status-publish entry" aria-label="Hot Water Scalding"><a href="https://rogergriffith.com/engineering/hot-water-scalding/" class="alignleft" aria-hidden="true" tabindex="-1"><img width="150" height="150" src="https://mlaswucanzbr.i.optimole.com/w:150/h:150/q:mauto/rt:fill/g:ce/https://rogergriffith.com/wp-content/uploads/2015/04/washing-hands.jpg" class="entry-image attachment-page" alt="" loading="lazy" data-attachment-id="234" data-permalink="https://rogergriffith.com/engineering/hot-water-scalding/washing-hands/" data-orig-file="https://mlaswucanzbr.i.optimole.com/w:auto/h:auto/q:mauto/https://rogergriffith.com/wp-content/uploads/2015/04/washing-hands.jpg" data-orig-size="400,267" data-comments-opened="1" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"}" data-image-title="washing hands" data-image-description="" data-image-caption="" data-medium-file="https://mlaswucanzbr.i.optimole.com/w:300/h:200/q:mauto/https://rogergriffith.com/wp-content/uploads/2015/04/washing-hands.jpg" data-large-file="https://mlaswucanzbr.i.optimole.com/w:auto/h:auto/q:mauto/https://rogergriffith.com/wp-content/uploads/2015/04/washing-hands.jpg" /></a><header class="entry-header"><h2 class="entry-title"><a href="https://rogergriffith.com/engineering/hot-water-scalding/">Hot Water Scalding</a></h2></header></article></div></section> <section id="featured-page-5" class="widget featured-content featuredpage"><div class="widget-wrap"><article class="post-239 page type-page status-publish entry" aria-label="Carbon Monoxide Poisoning"><a href="https://rogergriffith.com/carbon-monoxide-poisoning/" class="alignleft" aria-hidden="true" tabindex="-1"><img width="150" height="150" src="https://mlaswucanzbr.i.optimole.com/w:150/h:150/q:mauto/rt:fill/g:ce/https://rogergriffith.com/wp-content/uploads/2015/04/CO-poisoning.jpg" class="entry-image attachment-page" alt="" loading="lazy" data-attachment-id="241" data-permalink="https://rogergriffith.com/carbon-monoxide-poisoning/co-poisoning/" data-orig-file="https://mlaswucanzbr.i.optimole.com/w:auto/h:auto/q:mauto/https://rogergriffith.com/wp-content/uploads/2015/04/CO-poisoning.jpg" data-orig-size="385,256" data-comments-opened="1" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"}" data-image-title="CO poisoning" data-image-description="" data-image-caption="" data-medium-file="https://mlaswucanzbr.i.optimole.com/w:300/h:199/q:mauto/https://rogergriffith.com/wp-content/uploads/2015/04/CO-poisoning.jpg" data-large-file="https://mlaswucanzbr.i.optimole.com/w:auto/h:auto/q:mauto/https://rogergriffith.com/wp-content/uploads/2015/04/CO-poisoning.jpg" /></a><header class="entry-header"><h2 class="entry-title"><a href="https://rogergriffith.com/carbon-monoxide-poisoning/">Carbon Monoxide Poisoning</a></h2></header></article></div></section> <section id="featured-page-6" class="widget featured-content featuredpage"><div class="widget-wrap"><article class="post-243 page type-page status-publish has-post-thumbnail entry" aria-label="Legionella"><a href="https://rogergriffith.com/engineering/legionella-2/" class="alignleft" aria-hidden="true" tabindex="-1"><img width="150" height="150" src="https://mlaswucanzbr.i.optimole.com/w:150/h:150/q:mauto/rt:fill/g:ce/https://rogergriffith.com/wp-content/uploads/2015/05/legionella.jpeg" class="entry-image attachment-page" alt="" loading="lazy" data-attachment-id="278" data-permalink="https://rogergriffith.com/engineering/legionella-2/legionella-2-2/" data-orig-file="https://mlaswucanzbr.i.optimole.com/w:auto/h:auto/q:mauto/https://rogergriffith.com/wp-content/uploads/2015/05/legionella.jpeg" data-orig-size="213,160" data-comments-opened="1" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"}" data-image-title="legionella" data-image-description="" data-image-caption="" data-medium-file="https://mlaswucanzbr.i.optimole.com/w:auto/h:auto/q:mauto/https://rogergriffith.com/wp-content/uploads/2015/05/legionella.jpeg" data-large-file="https://mlaswucanzbr.i.optimole.com/w:auto/h:auto/q:mauto/https://rogergriffith.com/wp-content/uploads/2015/05/legionella.jpeg" /></a><header class="entry-header"><h2 class="entry-title"><a href="https://rogergriffith.com/engineering/legionella-2/">Legionella</a></h2></header></article></div></section> <section id="featured-post-3" class="widget featured-content featuredpost"><div class="widget-wrap"></div></section> </div></div><div id="home-bottom" class="home-bottom widget-area"><div class="wrap"><section id="featured-post-4" class="widget featured-content featuredpost"><div class="widget-wrap"><h4 class="widget-title widgettitle">MOST RECENT POST</h4> <article class="post-318 post type-post status-publish format-standard has-post-thumbnail category-hot-water-systems category-plumbing category-recentposts category-water-heaters tag-thermal-expansion-tanks entry" aria-label="Thermal Expansion Tanks: Part 2 – Sizing"><a href="https://rogergriffith.com/thermal-expansion-tanks-part-2/" class="alignnone" aria-hidden="true" tabindex="-1"><img width="150" height="150" src="https://mlaswucanzbr.i.optimole.com/w:150/h:150/q:mauto/rt:fill/g:ce/https://rogergriffith.com/wp-content/uploads/2015/06/thermal-expansion-tank.gif" class="entry-image attachment-post" alt="" loading="lazy" data-attachment-id="296" data-permalink="https://rogergriffith.com/thermal-expansion-tanks-part-1/thermal-expansion-tank/" data-orig-file="https://mlaswucanzbr.i.optimole.com/w:auto/h:auto/q:mauto/https://rogergriffith.com/wp-content/uploads/2015/06/thermal-expansion-tank.gif" data-orig-size="201,154" data-comments-opened="1" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"}" data-image-title="thermal expansion tank" data-image-description="" data-image-caption="" data-medium-file="https://mlaswucanzbr.i.optimole.com/w:auto/h:auto/q:mauto/https://rogergriffith.com/wp-content/uploads/2015/06/thermal-expansion-tank.gif" data-large-file="https://mlaswucanzbr.i.optimole.com/w:auto/h:auto/q:mauto/https://rogergriffith.com/wp-content/uploads/2015/06/thermal-expansion-tank.gif" /></a><header class="entry-header"><h2 class="entry-title"><a href="https://rogergriffith.com/thermal-expansion-tanks-part-2/">Thermal Expansion Tanks: Part 2 – Sizing</a></h2></header><div class="entry-content"><p>How To Size Thermal Expansion Tanks For Hot Water Systems In Part 1 of this series, we looked at where thermal expansion tanks are needed. When it is determined that a tank should be included […]</p> </div></article><article class="post-332 post type-post status-publish format-standard has-post-thumbnail category-hot-water-systems category-plumbing category-recentposts category-water-heaters tag-thermal-expansion-tanks entry" aria-label="Thermal Expansion Tanks: Part 3"><a href="https://rogergriffith.com/thermal-expansion-tanks-part-3/" class="alignnone" aria-hidden="true" tabindex="-1"><img width="150" height="150" src="https://mlaswucanzbr.i.optimole.com/w:150/h:150/q:mauto/rt:fill/g:ce/https://rogergriffith.com/wp-content/uploads/2015/08/thermal-expansion-tank-support.jpeg" class="entry-image attachment-post" alt="" loading="lazy" data-attachment-id="336" data-permalink="https://rogergriffith.com/thermal-expansion-tanks-part-3/thermal-expansion-tank-support/" data-orig-file="https://mlaswucanzbr.i.optimole.com/w:auto/h:auto/q:mauto/https://rogergriffith.com/wp-content/uploads/2015/08/thermal-expansion-tank-support.jpeg" data-orig-size="259,194" data-comments-opened="1" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"}" data-image-title="thermal expansion tank support" data-image-description="" data-image-caption="" data-medium-file="https://mlaswucanzbr.i.optimole.com/w:auto/h:auto/q:mauto/https://rogergriffith.com/wp-content/uploads/2015/08/thermal-expansion-tank-support.jpeg" data-large-file="https://mlaswucanzbr.i.optimole.com/w:auto/h:auto/q:mauto/https://rogergriffith.com/wp-content/uploads/2015/08/thermal-expansion-tank-support.jpeg" /></a><header class="entry-header"><h2 class="entry-title"><a href="https://rogergriffith.com/thermal-expansion-tanks-part-3/">Thermal Expansion Tanks: Part 3</a></h2></header><div class="entry-content"><p>Selection and Installation of Thermal Expansion Tanks See Part 2 for calculating the expansion tank volumes. Now, using the calculated acceptance volume and total volume for the tank, select an expansion tank from the manufacturer’s […]</p> </div></article><article class="post-341 post type-post status-publish format-standard has-post-thumbnail category-hot-water-systems category-legionella category-plumbing category-recentposts entry" aria-label="Designing Plumbing Systems To Minimize Legionella"><a href="https://rogergriffith.com/how-to-design-plumbing-systems-to-minimize-legionella/" class="alignnone" aria-hidden="true" tabindex="-1"><img width="150" height="150" src="https://mlaswucanzbr.i.optimole.com/w:150/h:150/q:mauto/rt:fill/g:ce/https://rogergriffith.com/wp-content/uploads/2015/08/legionella.jpeg" class="entry-image attachment-post" alt="" loading="lazy" data-attachment-id="344" data-permalink="https://rogergriffith.com/how-to-design-plumbing-systems-to-minimize-legionella/legionella/" data-orig-file="https://mlaswucanzbr.i.optimole.com/w:auto/h:auto/q:mauto/https://rogergriffith.com/wp-content/uploads/2015/08/legionella.jpeg" data-orig-size="240,160" data-comments-opened="1" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"}" data-image-title="legionella" data-image-description="" data-image-caption="" data-medium-file="https://mlaswucanzbr.i.optimole.com/w:auto/h:auto/q:mauto/https://rogergriffith.com/wp-content/uploads/2015/08/legionella.jpeg" data-large-file="https://mlaswucanzbr.i.optimole.com/w:auto/h:auto/q:mauto/https://rogergriffith.com/wp-content/uploads/2015/08/legionella.jpeg" /></a><header class="entry-header"><h2 class="entry-title"><a href="https://rogergriffith.com/how-to-design-plumbing-systems-to-minimize-legionella/">Designing Plumbing Systems To Minimize Legionella</a></h2></header><div class="entry-content"><p>The recent outbreak of legionnaires’ disease in New York City has brought renewed attention to the inherent risks from legionella bacteria in HVAC and plumbing systems. 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