In Whiteout Survival, the Furnace is one of the most important buildings in your settlement. It’s the first structure you unlock and plays a major role in keeping your people alive during the harshest conditions. Whether you’re just starting out or planning serious upgrades in this strategy game, understanding how the Furnace works is key to ensuring your city’s survival and growth. Here’s a full breakdown of what the Furnace does, how to upgrade it, and the requirements you’ll need to meet along the way.

What the Furnace Does

The Furnace acts as the heart of your town in Whiteout Survival, and it serves two critical functions. First, it generates heat, keeping your Survivors warm during the day, night, and brutal snowstorms. Without enough heat, your people risk falling ill, which lowers productivity and slows down resource gathering and building progression. Second, the Furnace controls the maximum level other buildings can reach. You can’t upgrade structures like the Sawmill, Shelter, or Hero Hall beyond the current level of your Furnace, and higher Furnace levels also unlock new facilities and troops as you progress deeper into the game.

Upgrading the Furnace not only improves heat output but also boosts your overall Power, making it easier to rise in rankings and participate in more advanced content. It’s a building that ties directly into both your city’s stability and its future expansion, making it a top priority for all players.

How to Upgrade the Furnace

Upgrading the Furnace in Whiteout Survival requires a careful mix of building prerequisites, different resources like Wood, Coal, Iron, and Meat, plus a fair amount of time investment. Early on, Furnace upgrades mainly cost Wood and take just minutes to complete. However, as you push toward higher levels, the demands sharply increase, adding Coal, Iron, and later Meat to the list of materials needed. The construction time also grows significantly, turning into multi-day projects as you aim for Levels 20 and above.

Here’s the full breakdown of Furnace upgrade requirements from Level 1 to Level 30:

Furnace Level	Required Buildings	Resources Needed	Construction Time
1 → 2	Sawmill Lv.1	180 Wood	6 seconds
2 → 3	Shelter 1 Lv.2	805 Wood	1 minute
3 → 4	Coal Mine Lv.3	1.8k Wood, 360 Coal	3 minutes
4 → 5	Hero Hall Lv.3, Shelter 3 Lv.3	7.6k Wood, 1.5k Coal	10 minutes
5 → 6	Iron Mine Lv.5	19k Wood, 3.8k Coal, 960 Iron	30 minutes
6 → 7	Hunter’s Hut Lv.6	69k Wood, 13k Coal, 3.4k Iron	1 hour
7 → 8	Infantry Camp Lv.7	120k Wood, 25k Coal, 6.3k Iron	2 hours 30 minutes
8 → 9	Embassy Lv.8, Infirmary Lv.1	260k Wood, 52k Coal, 13k Iron	4 hours 30 minutes
9 → 10	Marksman Camp Lv.9, Research Center	460k Wood, 92k Coal, 23k Iron	6 hours
10 → 11	Embassy Lv.10, Lancer Camp Lv.10	1.3M Wood, 260k Coal, 65k Iron, 1.3M Meat	7 hours 30 minutes
11 → 12	Embassy Lv.11, Command Center Lv.1	1.6M Wood, 330k Coal, 84k Iron, 1.6M Meat	9 hours
12 → 13	Embassy Lv.12, Infantry Camp Lv.12	2.3M Wood, 470k Coal, 110k Iron, 2.3M Meat	11 hours
13 → 14	Embassy Lv.13, Marksman Camp Lv.13	3.1M Wood, 630k Coal, 150k Iron, 3.1M Meat	14 hours
14 → 15	Embassy Lv.14, Lancer Camp Lv.14	4.6M Wood, 930k Coal, 230k Iron, 4.6M Meat	18 hours
15 → 16	Embassy Lv.15, Research Center Lv.15	5.9M Wood, 1.1M Coal, 290k Iron, 5.9M Meat	1 day 6h 28m
16 → 17	Embassy Lv.16, Infantry Camp Lv.16	9.3M Wood, 1.8M Coal, 480k Iron, 9.3M Meat	1 day 12h 34m
17 → 18	Embassy Lv.17, Marksman Camp Lv.17	12M Wood, 2.5M Coal, 620k Iron, 12M Meat	1 day 19h 53m
18 → 19	Embassy Lv.18, Lancer Camp Lv.18	15M Wood, 3.1M Coal, 780k Iron, 15M Meat	2 days 17h 50m
19 → 20	Embassy Lv.19, Research Center Lv.19	21M Wood, 4.3M Coal, 1M Iron, 21M Meat	3 days 10h 18m
20 → 21	Embassy Lv.20, Infantry Camp Lv.20	27M Wood, 5.4M Coal, 1.3M Iron, 27M Meat	4 days 10h 59m
21 → 22	Embassy Lv.21, Marksman Camp Lv.21	36M Wood, 7.2M Coal, 1.8M Iron, 36M Meat	6 days 16h 29m
22 → 23	Embassy Lv.22, Lancer Camp Lv.22	44M Wood, 8.9M Coal, 2.2M Iron, 44M Meat	9 days 8h 40m
23 → 24	Embassy Lv.23, Research Center Lv.23	60M Wood, 12M Coal, 3M Iron, 60M Meat	13 days 2h 33m
24 → 25	Embassy Lv.24, Infantry Camp Lv.24	81M Wood, 16M Coal, 4M Iron, 81M Meat	18 days 8h 22m
25 → 26	Embassy Lv.25, Marksman Camp Lv.25	100M Wood, 21M Coal, 5.2M Iron, 100M Meat	21 days 2h 26m
26 → 27	Embassy Lv.26, Lancer Camp Lv.26	140M Wood, 24M Coal, 7.4M Iron, 140M Meat	25 days 7h 43m
27 → 28	Embassy Lv.27, Research Center Lv.27	190M Wood, 39M Coal, 9.9M Iron, 190M Meat	29 days 2h 52m
28 → 29	Embassy Lv.28, Infantry Camp Lv.28	240M Wood, 49M Coal, 12M Iron, 240M Meat	33 days 11h 42m
29 → 30	Embassy Lv.29, Marksman Camp Lv.29	300M Wood, 60M Coal, 15M Iron, 300M Meat	40 days 4h 27m

Efficient players tend to play on BlueStacks for all the automation and optimization tools that our Android app player offers. They also synchronize their building upgrades with the Furnace schedule, making sure that critical support buildings are upgraded right before the next Furnace tier becomes available. Managing your materials wisely and prioritizing the right upgrades can save you a lot of time and frustration as you grow your settlement.

The Furnace is far more than just a source of heat in Whiteout Survival; it’s the backbone of your entire city’s progress. Keeping it upgraded ensures that your Survivors stay healthy, your economy stays productive, and your military forces stay competitive against increasingly difficult challenges. Since the Furnace also dictates the level cap of your other buildings, treating it as your main upgrade priority will set you up for success throughout every stage of the game. Focus on balancing your upgrades, gathering enough resources early, and staying ahead of the cold — because when the next blizzard comes, your Survivors will be counting on you. Enjoy playing Whiteout Survival on PC or laptop with BlueStacks!