A cartridge (1900; 2204) for a vaporizer device, the cartridge (1900; 2204) comprising: a reservoir housing (1902; 2205) including a reservoir chamber (2006; 2106; 1906; 2234) configured to selectively hold a vaporizable material; and an atomizer (2004; 2104; 1904; 2228) in fluid communication with the reservoir chamber (2006; 2106; 1906; 2234), the atomizer (2004; 2104; 1904; 2228) comprising, a porous substrate (1908; 2230) comprising a plurality of voids, configured to draw the vaporizable material from the reservoir chamber (2006; 2106; 1906; 2234), and comprising at least one vent (2010; 2110; 1910; 2236) extending through the porous substrate (1908; 2230), the at least one vent (2010; 2110; 1910; 2236) being configured to allow the passage of air into the reservoir chamber (2006; 2106; 1906; 2234) in response to the withdrawal of at least a portion of the vaporizable material from the reservoir chamber (2006; 2106; 1906; 2234), and at least one surface heater (1912; 2226) configured to heat at least a portion of vaporizable material drawn into the porous substrate (1908; 2230) into a vaporized vaporizable material, the at least one surface heater (1912; 2226) comprising at least one electrically conductive layer deposited on a portion of the porous substrate (1908; 2230). a reservoir housing (1902; 2205) including a reservoir chamber (2006; 2106; 1906; 2234) configured to selectively hold a vaporizable material; and an atomizer (2004; 2104; 1904; 2228) in fluid communication with the reservoir chamber (2006; 2106; 1906; 2234), the atomizer (2004; 2104; 1904; 2228) comprising, a porous substrate (1908; 2230) comprising a plurality of voids, configured to draw the vaporizable material from the reservoir chamber (2006; 2106; 1906; 2234), and comprising at least one vent (2010; 2110; 1910; 2236) extending through the porous substrate (1908; 2230), the at least one vent (2010; 2110; 1910; 2236) being configured to allow the passage of air into the reservoir chamber (2006; 2106; 1906; 2234) in response to the withdrawal of at least a portion of the vaporizable material from the reservoir chamber (2006; 2106; 1906; 2234), and at least one surface heater (1912; 2226) configured to heat at least a portion of vaporizable material drawn into the porous substrate (1908; 2230) into a vaporized vaporizable material, the at least one surface heater (1912; 2226) comprising at least one electrically conductive layer deposited on a portion of the porous substrate (1908; 2230). a porous substrate (1908; 2230) comprising a plurality of voids, configured to draw the vaporizable material from the reservoir chamber (2006; 2106; 1906; 2234), and comprising at least one vent (2010; 2110; 1910; 2236) extending through the porous substrate (1908; 2230), the at least one vent (2010; 2110; 1910; 2236) being configured to allow the passage of air into the reservoir chamber (2006; 2106; 1906; 2234) in response to the withdrawal of at least a portion of the vaporizable material from the reservoir chamber (2006; 2106; 1906; 2234), and at least one surface heater (1912; 2226) configured to heat at least a portion of vaporizable material drawn into the porous substrate (1908; 2230) into a vaporized vaporizable material, the at least one surface heater (1912; 2226) comprising at least one electrically conductive layer deposited on a portion of the porous substrate (1908; 2230). <EOS>