Durablow MFB M1 Stainless Steel 304 Crawl Space Foundation Fan Ventilator+ Freeze Protection Thermostat Dimensions L x W x H: 14-3/8" x 6-7/8" x 2".  Powered one-fan ventilator, seven leaves AC axial fan. (without 3-prong plug head) This item requires power switch or de-humidistat (not included) provided by installer, hardwired. Multiple MFB M1 ventilators can be controlled by a single power switch or de-humidistat, like Durablow outlet model # MDT2P. Freeze protection thermostat.  UL listed parts used. DURABLE, QUIET, & SAFE. REAL All Stainless Steel 304 panel and housing for longer life in humid environment. <span class="a-text-bold">Components:</span>T304 has a minimum of 10 percent chromium, 8 percent nickel, a maximum of 0.8 percent carbon, and more than 50 percent iron. The exact proportions of these and other trace elements depend on the specific uses planned for end product. <span class="a-text-bold">Rust Resistant:</span>An important characteristic of T304 that makes it suitable for damp place use is that it is corrosion-resistant. Chromium binds oxygen on the surface and protects the iron component from oxidation (rust). <span class="a-text-bold">Long-Lasting:</span>The first use of T304 was in brewing and milk production but it was adopted rapidly throughout the food processing and building industry. T304 products will last several human lifetimes when properly maintained. <span class="a-text-bold">Dimensions:</span> 14 3/8&#034; x 6 7/8&#034; x 2&#034; <span class="a-text-bold">Ratings:</span>120 Volts ~ 50/60 Hz, 0.30 Amps MAX. <span class="a-text-bold">Built-in Dehumidistat:</span> None. <span class="a-text-bold">Thermostat protection:</span>Shuts off power when Temperature drops below 32 or 0 <span class="a-text-bold">100% Stainless Steel 430</span>Grade panel &amp; housing box <span class="a-text-bold">Standard:</span>All UL listed components. <span class="a-text-bold">Noise level:</span>45-55 dB. <span class="a-text-bold">Power cord:</span>At least 6.5 feet. <span class="a-text-bold">Air Flow:</span>110 CFM