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Electric radiant floors are usually only cost-effective if your electric utility company offers time-of-use rates. Time-of-use rates allow you to “charge” the concrete floor with heat during off-peak hours (approximately 9 p.m. to 6 a.m.). If the floor's thermal mass is large enough, the heat stored in it will keep the house comfortable for eight to ten hours without any further electrical input. This practice saves a considerable number of energy dollars compared to heating at peak electric rates during the day.

Butterfly valve

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Because air cannot hold large amounts of heat, radiant air floors are not cost-effective in residential applications and are seldom installed.

Pressureregulating valve

Author: Dr. Sarma Pisupati, Professor, Department of Energy and Mineral Engineering, College of Earth and Mineral Sciences, The Pennsylvania State University.

Instructions: Dr. P. is doing some remodeling and needs to purchase new flooring. Assuming his home uses radiant heat, help him select the most appropriate flooring option.

Regulating valve

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Pressure regulating or reducing valves (PRVs) help control downstream water pressure in commercial and residential systems. Each water pressure regulating valve is tested for quality and efficiency before leaving our factory so you know it’s reliable under pressure. Plus, a number of our PRVs are designed with SharkBite connectors to simplify installations and repairs.

A new generation of in-floor hydronic heating that employs corrosion-proof, hot-water tubing has enjoyed widespread popularity in recent years. With this type of system, heat is evenly distributed and floors are warm under foot. A variety of heating equipment may heat water: natural gas or propane water heater or boiler, electric boiler, wood boiler, heat pump, solar collector, or even geothermal energy.

This courseware module is offered as part of the Repository of Open and Affordable Materials at Penn State. Except where otherwise noted, content on this site is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. The College of Earth and Mineral Sciences is committed to making its websites accessible to all users, and welcomes comments or suggestions on access improvements. Please send comments or suggestions on accessibility to the site editor. The site editor may also be contacted with questions or comments about this Open Educational Resource.

Waterpressure regulator

The John A. Dutton Institute for Teaching and Learning Excellence is the learning design unit of the College of Earth and Mineral Sciences at The Pennsylvania State University.

Tubing for a hydronic system may be installed in a conventional concrete slab or in a lightweight, gypsum-cement slab. It can also be stapled to the undersides of subflooring as shown in the image below:

Regulator

PressureReducing Valve

Although ceramic tile is the most common floor covering for radiant floor heating, almost any floor covering can be used. However, some perform better than others. Common floor coverings like vinyl and linoleum sheet goods, carpeting, wood, or bare concrete are often specified.

PRV valve

Hydronic radiant floor systems pump heated water from a boiler through tubing laid in a pattern underneath the floor. The temperature in each room is controlled by regulating the flow of hot water through each tubing loop via a system of zoning valves or pumps and thermostats.

Most Cash Acme water pressure regulators come preset at 45psi but can be adjusted within a specific range depending on the model. As the downstream water pressure approaches the set pressure, the valve will close off, not allowing water to pass through. As that downstream water pressure drops, typically due to water usage, the pressure regulator will open back up letting water through to recharge the system as long as the demand is needed.

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Cash Acme has been manufacturing state-of-the-art PRV valves for over 100 years. With over 150 water pressure reducing valve sizes and configurations, our inventory of water pressure regulators is more than capable of handling your commercial, residential and even agricultural product needs. Browse our complete selection of pressure control valves below.

Wet installations are the oldest form of modern radiant floor systems. In a wet installation, the tubing is embedded in the concrete foundation slab, or in a lightweight concrete slab on top of a subfloor, or over a previously poured slab.

Hydronic (liquid) systems, popular and cost-effective systems for heating-dominated climates, have been in extensive use in Europe for decades.

A new generation of hydronic heating: This photograph depicts corrosion-proof, hot-water tubing stapled to the underside of subflooring.