NATURAL VENTILATION FOR ENCLOSED BUILDINGS IN RURAL AND GAOTHAN AREAS

摘要

The general layout of houses in gaothan & rural areas is a typical row housing style i.e. with common walls on at least two sides, in some cases even on three sides. Such sites have their width very less as compared to other dimension i.e. length .The common term used for width in rural areas is YEL. (lyel = 6 to7ft). The general size of site is about lyel to 2yel width & lOyei to 15yel lengths, for such sites there is no scope to provide windows in common enclosed walls as we provide in urban houses. Here comes in to picture a MAJOR PROBLEM with such houses, i.e. no or less ventilation. Thus the situation in such houses becomes very critical due to insufficient ventilation. Of course roof ventilation in the form of opening called as SANA is provided but such Sana"s aren"t sufficient, also they are required to be covered in monsoon season with polythene paper to prevent entry of rain water inside the building which reduces light, secondly if such openings are kept uncovered especially for bed roonis then no privacy is left for bedrooms and situation become horrible because the purpose for which such rooms are planned that will not be served. Habitants have no other alternative than to use light,.fan, coolers etc. but our MSEDCL (former MSEB) doesn"t allow us to use electricity due to load shading of 12 hrs in rural areas. To overcome above mentioned -problems an attempt has been made by us by providing a continuous strip of 0.45m to 0.60m wide opening all around a periphery and in central portion of the roof slab ( 1.2m by 1.5m ) & covering this opening with FRP sheet sloping inward to allow sufficient light. The louvered ventilators with movable louvers in the inner parapet walls are provided to allow air, breeze in the house. Thus a permanent, maintenance free lifelong solution is suggested due to which habitant of rural houses don"t have to use lights, fans, coolers right from 6a.m to 6 p.m 365 DAY"S i.e. throughout the year. Hence Electricity Bills are reduced to almost 50 % to 75%. By this technique the houses remain warm in winter and cool in summer. Natural Resources such as sun, wind, and breeze are harnessed and managed. Additional benefit of this technique is that in monsoon season Rain Water Harvesting is possible & we can store rain water which otherwise might have gone wasted. China mosaic water proofing treatment given on terrace is beneficial for reducing temperature in summer season. Temperature difference inside the building as compared to outside temperature is recorded abut 4 degrees to 6 degrees in summer as well in winter due to unexposed walls, china mosaic treatment & movable louvers.