diff --git a/client/app.js b/client/app.js
index c6f0749..c938854 100644
--- a/client/app.js
+++ b/client/app.js
@@ -5,7 +5,6 @@ import React from 'react';
 import ReactDOM from 'react-dom';
 import Layout from './dashboard/layout/layout';
 
-
 ReactDOM.render(
   React.createElement(Layout),
   document.getElementById('root')
diff --git a/client/config/db.js b/client/config/db.js
new file mode 100644
index 0000000..c974c4b
--- /dev/null
+++ b/client/config/db.js
@@ -0,0 +1,9 @@
+import Loki from 'lokijs';
+
+var db = new Loki('spike');
+
+db.addCollection('PowerData');
+db.addCollection('EnergyData');
+db.addCollection('Houses');
+
+export default
diff --git a/client/lib/model.js b/client/lib/model.js
new file mode 100644
index 0000000..0a61b40
--- /dev/null
+++ b/client/lib/model.js
@@ -0,0 +1,9 @@
+import Loki from 'lokijs';
+
+
+class Model {
+
+
+
+
+}
diff --git a/client/models/house.js b/client/models/house.js
index 8bc04c6..ef105a7 100644
--- a/client/models/house.js
+++ b/client/models/house.js
@@ -1,4 +1,5 @@
 import extend from 'extend';
+import Loki from 'loki';
 
 import PowerDatum from './power_datum';
 import EnergyDatum from './energy_datum';
@@ -18,6 +19,8 @@ class House {
     house.power_data = [];
     house.energy_data_store = new Map();
     house.power_data_store = new Map();
+
+    house.initDatabase();
   }
 
   get react_key(){
@@ -29,32 +32,14 @@ class House {
       start_date: undefined,
       end_date: undefined
     }, opts || {});
-    var house = this,
-      date_range = Array.from(house.power_data_store.keys()),
-      min_date = Math.min(date_range),
-      max_date = Math.max(date_range),
-      query_ranges, cache;
+    var house = this;
 
-    if (date_range.length === 0){
-      return house.getPowerData({dates: [[opts.start_date, opts.end_date]]});
-    }
-
-    query_ranges = MathUtil.minusRange([opts.start_date, opts.end_date], [min_date, max_date]);
-    if (!query_ranges) return Promise.resolve(house.power_data);
-
-    cache = ArrayUtil.selectMap(date_range, (datum_time)=>{
-      return ArrayUtil.all(query_ranges, (query_range)=>{
-        !MathUtil.inRange(datum_time, query_range);
-      });
-    }, (datum_time)=>{
-      return house.power_data_store.get(datum_time);
+    // check mins and maxes.
+    house.initCollection(PowerDatum.NAME).then(()=>{
+      house.power_datum_collection.
     });
 
-    if (query_ranges.length > 0){
-      return house.getPowerData({dates: query_ranges}).then((new_power_data)=>{
-        return new_power_data.concat(cache);
-      });
-    } else return Promise.resolve(cache);
+    return Promise.resolve(cache);
   }
 
   getPowerData(params){
@@ -62,8 +47,10 @@ class House {
     params.house_id = house.data.id;
     return PowerDataApi.index(params).then((power_data)=>{
       return power_data.map((power_datum_data)=>{
+        // save new power data into db
+        // update mins and maxes.
         var power_datum = PowerDatum.updateOrInitialize(power_datum_data, house);
-        house.power_data_store.set(power_datum.data.time, power_datum);
+        house.power_data_collection.set(power_datum.data.time, power_datum);
         house.power_data.push(power_datum);
         return power_datum;
       });
@@ -126,26 +113,63 @@ class House {
     return house || new House(data, data)
   }
 
-  static ensureHouses(ids){
-    var required_ids, cached_houses = [];
-    if (ids){
-      required_ids = ArrayUtil.diff(ids, House.store.keys());
-      cached_houses = ArrayUtil.diff(ids, required_ids).map((id)=>{ return House.store.get(id); });
-    }
-    if (required_ids && required_ids.length == 0) return Promise.resolve([]);
-
-    return House.getHouses(required_ids).then((new_houses)=>{
-      // if these need to be ordered, then concatenation needs to be merged in order.
-      return new_houses.concat(cached_houses);
+  static accessDb(){
+    return new Promise((fnResolve, fnReject){
+      if (!this.db) {
+        this.db = new Loki('houses', adapter: '');
+        this.db.loadDatabase({}, ()=>{
+          fnResolve(this.db);
+        });
+      } else { fnResolve(this.db); }
     });
   }
 
-  static getHouses(ids){
-    return HousesApi.index({id: ids}).then((houses_data)=>{
-      return houses_data.map((house_data)=>{
-        return new House(house_data);
+  static closeDb(){
+    if (this.db){
+      this.db.save();
+      this.db.close();
+      this.db = undefined;
+    }
+  }
+
+  static collection(){
+    return House.accessDb()
+      .then((db)=>{
+        var house_collection = db.getCollection('houses')
+        if (!house_collection){
+          house_collection = db.addCollection('houses', {indices: ['id']});
+        }
+        return house_collection;
+      });
+  }
+
+  static ensureHouses(ids){
+    House.collection()
+      .then((house_collection)=>{
+        houses = house_collection.find({id: {$in: ids}});
+        if (houses.length !== ids.length){
+          required_ids = ArrayUtil.diff(ids, houses.map((house)=>{ return house.id; }));
+          return House.getHouses(required_ids)
+            .then((required_houses){
+              return houses.concat(required_houses);
+            });
+        } else { return houses; }
+      }).then((house_data)=>{
+        return houses_data.map((house_data)=>{ return new House(house_data); })
+      });
+  }
+
+  static getHouses(ids){
+    return HousesApi.index({id: ids})
+      .then((houses_data)=>{
+        return House.collection()
+          .then((house_collection)=>{
+            houses_data.forEach((house_data)=>{
+              house_collection.insert(house_data);
+            });
+            return houses_data;
+          });
       });
-    });
   }
 
 }
diff --git a/package.json b/package.json
index fc3fb2d..1922ea9 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,8 @@
     "moment-timezone":"0.5.0",
     "yargs": "3.32.0",
     "extend": "3.0.0",
-    "through2": "2.0.1"
+    "through2": "2.0.1",
+    "lokijs": "1.3.11"
   },
   "devDependencies": {
     "gulp": "^3.9.0",